199
FNUS53 KLOT 180943
FWFLOT
FIRE WEATHER PLANNING FORECAST FOR NORTHERN IL AND NORTHWEST IN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
443 AM CDT MON MAY 18 2026
DISCUSSION
SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP EAST ACROSS THE
AREA THIS MORNING, LIKELY BECOMING MORE NUMEROUS ALONG AND SOUTH
OF THE I-80 CORRIDOR LATE MORNING INTO THIS AFTERNOON. A FEW
STRONG TO SEVERE STORMS WILL BE POSSIBLE MAINLY IN THAT AREA, WITH
GUSTY WINDS AND LARGE HAIL THE MAIN SEVERE WEATHER THREATS.
SHOWERS AND STORMS MAY LINGER ALONG THE U.S. 24 CORRIDOR INTO THIS
EVENING. ANOTHER ROUND OF STORMS IS EXPECTED TO MOVE INTO THE
AREA FROM THE WEST EARLY TUESDAY MORNING, IN A SIMILAR FASHION TO
THIS MORNING'S ACTIVITY. A COLD FRONT WILL MOVE ACROSS THE AREA
TUESDAY AFTERNOON AND EVENING, WITH A FEW STRONG TO SEVERE STORMS
POSSIBLE AT THAT TIME. OUTSIDE OF STORMS, IT WILL REMAIN WARM AND
BREEZY WITH GENERALLY SOUTH WINDS GUSTING AS HIGH AS 25 TO 30 MPH
AT TIMES BOTH TODAY AND TUESDAY.
DRY AND COOLER WEATHER WILL ARRIVE BEHIND THE COLD FRONT FOR
WEDNESDAY AND THURSDAY. DAYTIME HIGHS WILL GENERALLY BE IN THE
60S, THOUGH ONSHORE WINDS OFF OF LAKE MICHIGAN WILL HOLD
TEMPERATURES TO THE 50S NEAR THE SHORE, WITH LIMITED MIXING
HEIGHTS AS WELL. MILDER WEATHER WILL RETURN FRIDAY INTO THE
WEEKEND, WITH SOME OCCASIONAL CHANCES FOR SCATTERED SHOWERS AND
THUNDERSTORMS.
ILZ014-182115-
COOK-
INCLUDING THE CITIES OF CHICAGO, SCHAUMBURG, EVANSTON, OAK LAWN,
LEMONT, ORLAND PARK, AND PARK FOREST
443 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLDY PCLDY MCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 70 50 60 20
MAX TEMP (24HR TREND) 81 (-5) 80
MIN RH % (24HR TREND) 63 (+17) 57
MIN TEMP (24HR TREND) 67 (-2) 49
MAX RH % (24HR TREND) 88 (+19) 78
20FT WIND AM (MPH) SW 10-15 SW 15-20
20FT WIND PM (MPH) SW 10-15 S 10-15 W 15-20 NW 10
PEAK WIND GUSTS (MPH) 29 29 30 19
PRECIP AMOUNT (IN) 0.10-0.25 0.01-0.05 0.01-0.05 0.01-0.05
11 AM MIXING HGT (FT) 2400 3500
MAX MIXING HGT (FT) 2700 4400
TRANSPORT WND (MPH) SW 23 W 28
VENT RATE (MPH-FT) 62100 127600
VENT RATE CATEGORY FAIR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 50S. NORTH WINDS
AROUND 10 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 40S. NORTHEAST
WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 60S. NORTHEAST WINDS
AROUND 10 MPH.
THURSDAY NIGHT
MOSTLY CLOUDY. LOWS IN THE UPPER 40S. NORTHEAST
WINDS 5 TO 10 MPH.
FRIDAY
MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE MORNING.
HIGHS IN THE UPPER 60S. EAST WINDS AROUND 10 MPH.
FRIDAY NIGHT
MOSTLY CLOUDY. A CHANCE OF SHOWERS AFTER
MIDNIGHT. LOWS IN THE LOWER 50S. EAST WINDS AROUND 5 MPH.
SATURDAY
PARTLY SUNNY. HIGHS IN THE LOWER 70S. NORTHEAST WINDS
AROUND 5 MPH.
SATURDAY NIGHT
MOSTLY CLOUDY IN THE EVENING, THEN BECOMING
PARTLY CLOUDY. LOWS IN THE MID 50S. NORTH WINDS AROUND 5 MPH IN
THE EVENING, BECOMING LIGHT.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. SOUTHEAST WINDS
AROUND 5 MPH.
ILZ006-182115-
LAKE IL-
INCLUDING THE CITIES OF WAUKEGAN, BUFFALO GROVE, MUNDELEIN,
AND GURNEE
443 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLDY MCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 70 60 50
MAX TEMP (24HR TREND) 81 (-2) 78
MIN RH % (24HR TREND) 62 (+6) 54
MIN TEMP (24HR TREND) 66 (+1) 47
MAX RH % (24HR TREND) 90 (+13) 79
20FT WIND AM (MPH) SW 10-15 SW 15-20
20FT WIND PM (MPH) SW 10-15 S 15-20 W 15-20 NW 9-10
PEAK WIND GUSTS (MPH) 28 29 30 21
PRECIP AMOUNT (IN) 0.10-0.25 0.01-0.05 0.01-0.05 0.00
11 AM MIXING HGT (FT) 1900 3600
MAX MIXING HGT (FT) 2800 3700
TRANSPORT WND (MPH) SW 21 SW 28
VENT RATE (MPH-FT) 61600 107300
VENT RATE CATEGORY FAIR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 50S. NORTH WINDS
AROUND 10 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 40S.
NORTHEAST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 50S. NORTHEAST WINDS
AROUND 10 MPH.
THURSDAY NIGHT
MOSTLY CLOUDY. LOWS IN THE UPPER 40S. NORTHEAST
WINDS 5 TO 10 MPH.
FRIDAY
MOSTLY CLOUDY. HIGHS IN THE MID 60S. EAST WINDS AROUND
10 MPH.
FRIDAY NIGHT
MOSTLY CLOUDY. LOWS AROUND 50. EAST WINDS AROUND
5 MPH.
SATURDAY
PARTLY SUNNY. HIGHS IN THE LOWER 70S. NORTHEAST WINDS
AROUND 5 MPH.
SATURDAY NIGHT
MOSTLY CLOUDY IN THE EVENING, THEN BECOMING
PARTLY CLOUDY. LOWS IN THE LOWER 50S. NORTH WINDS AROUND 5 MPH IN
THE EVENING, BECOMING LIGHT.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTHWEST WINDS
AROUND 5 MPH, BECOMING EAST IN THE AFTERNOON.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. SOUTHEAST
WINDS AROUND 5 MPH.
INZ001-182115-
LAKE IN-
INCLUDING THE CITIES OF GARY, HAMMOND, AND MERRILLVILLE
443 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLDY PCLDY MCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 70 40 70 30
MAX TEMP (24HR TREND) 80 (-6) 81
MIN RH % (24HR TREND) 66 (+21) 63
MIN TEMP (24HR TREND) 66 (-1) 49
MAX RH % (24HR TREND) 92 (+22) 85
20FT WIND AM (MPH) SW 10-15 SW 15-20
20FT WIND PM (MPH) SW 10-15 S 10-15 W 15-20 NW 9-10
PEAK WIND GUSTS (MPH) 27 28 29 21
PRECIP AMOUNT (IN) 0.25-0.50 0.01-0.05 0.05-0.10 0.01-0.05
11 AM MIXING HGT (FT) 2700 3200
MAX MIXING HGT (FT) 2700 4400
TRANSPORT WND (MPH) SW 25 SW 29
VENT RATE (MPH-FT) 67500 132000
VENT RATE CATEGORY FAIR VERY GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 50S. NORTH WINDS
AROUND 15 MPH.
WEDNESDAY NIGHT
MOSTLY CLOUDY IN THE EVENING, THEN BECOMING
PARTLY CLOUDY. LOWS IN THE LOWER 40S. NORTH WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE MID 60S. NORTHEAST WINDS
AROUND 10 MPH.
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE UPPER 40S. NORTHEAST WINDS 5 TO
10 MPH.
FRIDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. HIGHS IN THE
UPPER 60S. EAST WINDS 5 TO 10 MPH.
FRIDAY NIGHT
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS IN
THE LOWER 50S. EAST WINDS AROUND 5 MPH.
SATURDAY
PARTLY SUNNY. HIGHS IN THE MID 70S. EAST WINDS AROUND
5 MPH.
SATURDAY NIGHT
MOSTLY CLOUDY IN THE EVENING, THEN BECOMING
PARTLY CLOUDY. LOWS IN THE MID 50S. SOUTHWEST WINDS AROUND 5 MPH.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHWEST WINDS
AROUND 5 MPH, BECOMING NORTH IN THE AFTERNOON.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. EAST WINDS
AROUND 5 MPH, BECOMING SOUTH AFTER MIDNIGHT.
INZ002-182115-
PORTER-
INCLUDING THE CITIES OF PORTAGE, VALPARAISO, AND CHESTERTON
443 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLDY PCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 70 30 70 40
MAX TEMP (24HR TREND) 80 (-5) 81
MIN RH % (24HR TREND) 65 (+23) 64
MIN TEMP (24HR TREND) 66 (-1) 48
MAX RH % (24HR TREND) 92 (+21) 87
20FT WIND AM (MPH) SW 10-15 SW 15-20
20FT WIND PM (MPH) SW 10-15 S 10-15 W 15-20 NW 9-11
PEAK WIND GUSTS (MPH) 27 28 29 21
PRECIP AMOUNT (IN) 0.50-0.75 0.01-0.05 0.05-0.10 0.01-0.05
11 AM MIXING HGT (FT) 2700 3200
MAX MIXING HGT (FT) 2700 4600
TRANSPORT WND (MPH) SW 25 SW 28
VENT RATE (MPH-FT) 67500 133400
VENT RATE CATEGORY FAIR VERY GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 50S. NORTH WINDS
AROUND 15 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 40S. NORTH
WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE MID 60S. NORTHEAST WINDS
AROUND 10 MPH.
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE UPPER 40S. EAST WINDS 5 TO 10 MPH.
FRIDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. HIGHS AROUND
70. EAST WINDS AROUND 10 MPH.
FRIDAY NIGHT
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS IN
THE LOWER 50S. EAST WINDS AROUND 5 MPH.
SATURDAY
PARTLY SUNNY WITH A CHANCE OF SHOWERS. HIGHS IN THE
LOWER 70S. SOUTHEAST WINDS AROUND 5 MPH, BECOMING NORTH IN THE
AFTERNOON.
SATURDAY NIGHT
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS IN THE
EVENING, THEN PARTLY CLOUDY AFTER MIDNIGHT. LOWS IN THE MID 50S.
SOUTHWEST WINDS AROUND 5 MPH.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. SOUTHWEST WINDS
AROUND 5 MPH, BECOMING NORTH IN THE AFTERNOON.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. SOUTHEAST
WINDS AROUND 5 MPH.
ILZ013-182115-
DUPAGE-
INCLUDING THE CITIES OF NAPERVILLE, WHEATON, DOWNERS GROVE,
LOMBARD, AND CAROL STREAM
443 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLDY PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 70 50 50 10
MAX TEMP (24HR TREND) 81 (-5) 80
MIN RH % (24HR TREND) 65 (+18) 56
MIN TEMP (24HR TREND) 66 (-2) 49
MAX RH % (24HR TREND) 92 (+21) 78
20FT WIND AM (MPH) SW 10-15 SW 15-20
20FT WIND PM (MPH) SW 10-15 S 10-15 W 15-20 NW 9-11
PEAK WIND GUSTS (MPH) 27 28 30 19
PRECIP AMOUNT (IN) 0.10-0.25 0.01-0.05 0.01-0.05 0.00
11 AM MIXING HGT (FT) 2000 3300
MAX MIXING HGT (FT) 2600 3900
TRANSPORT WND (MPH) SW 23 SW 27
VENT RATE (MPH-FT) 59800 109200
VENT RATE CATEGORY FAIR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 60S. NORTH WINDS
AROUND 10 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 40S. NORTHEAST
WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE MID 60S. NORTHEAST WINDS
AROUND 10 MPH.
THURSDAY NIGHT
MOSTLY CLOUDY. LOWS IN THE UPPER 40S. EAST
WINDS 5 TO 10 MPH.
FRIDAY
MOSTLY CLOUDY. HIGHS AROUND 70. EAST WINDS AROUND
10 MPH.
FRIDAY NIGHT
MOSTLY CLOUDY. LOWS IN THE LOWER 50S. EAST WINDS
AROUND 5 MPH.
SATURDAY
PARTLY SUNNY. HIGHS IN THE MID 70S. NORTHEAST WINDS
AROUND 5 MPH, BECOMING SOUTHWEST IN THE AFTERNOON.
SATURDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN CLEARING.
LOWS IN THE MID 50S. WEST WINDS AROUND 5 MPH.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 80S. NORTH WINDS
AROUND 5 MPH, BECOMING SOUTH IN THE AFTERNOON.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. SOUTHEAST
WINDS AROUND 5 MPH.
ILZ012-182115-
KANE-
INCLUDING THE CITIES OF AURORA AND ELGIN
443 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLDY PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 70 60 60
MAX TEMP (24HR TREND) 81 (-4) 78
MIN RH % (24HR TREND) 66 (+17) 56
MIN TEMP (24HR TREND) 65 (-2) 47
MAX RH % (24HR TREND) 95 (+17) 80
20FT WIND AM (MPH) SW 15-20 SW 15-20
20FT WIND PM (MPH) SW 15-20 S 15-20 W 15-20 NW 9-11
PEAK WIND GUSTS (MPH) 28 29 31 19
PRECIP AMOUNT (IN) 0.10-0.25 0.05-0.10 0.01-0.05 0.00
11 AM MIXING HGT (FT) 1700 3200
MAX MIXING HGT (FT) 2700 3500
TRANSPORT WND (MPH) SW 21 SW 28
VENT RATE (MPH-FT) 59400 101500
VENT RATE CATEGORY FAIR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 60S. NORTH WINDS
AROUND 10 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 40S.
NORTHEAST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE MID 60S. EAST WINDS AROUND
10 MPH.
THURSDAY NIGHT
MOSTLY CLOUDY. LOWS IN THE UPPER 40S. EAST
WINDS 5 TO 10 MPH.
FRIDAY
MOSTLY CLOUDY. HIGHS IN THE UPPER 60S. EAST WINDS
AROUND 10 MPH.
FRIDAY NIGHT
MOSTLY CLOUDY. LOWS IN THE LOWER 50S. EAST WINDS
AROUND 5 MPH.
SATURDAY
PARTLY SUNNY. HIGHS IN THE MID 70S. NORTHEAST WINDS
AROUND 5 MPH, BECOMING SOUTHWEST IN THE AFTERNOON.
SATURDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN CLEARING.
LOWS IN THE MID 50S. WEST WINDS AROUND 5 MPH, BECOMING SOUTHWEST
AFTER MIDNIGHT.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 80S. NORTH WINDS
AROUND 5 MPH, BECOMING SOUTH IN THE AFTERNOON.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. SOUTHEAST
WINDS AROUND 5 MPH.
ILZ005-182115-
MCHENRY-
INCLUDING THE CITIES OF CRYSTAL LAKE, ALGONQUIN, MCHENRY,
AND WOODSTOCK
443 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLDY MCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 70 70 50
MAX TEMP (24HR TREND) 81 (-3) 77
MIN RH % (24HR TREND) 66 (+17) 55
MIN TEMP (24HR TREND) 65 (-2) 46
MAX RH % (24HR TREND) 92 (+11) 81
20FT WIND AM (MPH) SW 10-15 SW 15-20
20FT WIND PM (MPH) SW 10-15 S 15-20 W 15-20 NW 9-10
PEAK WIND GUSTS (MPH) 28 29 30 20
PRECIP AMOUNT (IN) 0.10-0.25 0.05-0.10 0.01-0.05 0.00
11 AM MIXING HGT (FT) 1800 3200
MAX MIXING HGT (FT) 2900 3400
TRANSPORT WND (MPH) SW 21 W 21
VENT RATE (MPH-FT) 63800 74800
VENT RATE CATEGORY FAIR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 60S. NORTH WINDS
AROUND 10 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 40S.
NORTHEAST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 60S. EAST WINDS
AROUND 10 MPH.
THURSDAY NIGHT
MOSTLY CLOUDY. LOWS IN THE MID 40S. EAST WINDS
5 TO 10 MPH.
FRIDAY
MOSTLY CLOUDY. HIGHS IN THE UPPER 60S. EAST WINDS
AROUND 10 MPH.
FRIDAY NIGHT
MOSTLY CLOUDY. LOWS AROUND 50. EAST WINDS AROUND
5 MPH.
SATURDAY
PARTLY SUNNY. HIGHS IN THE MID 70S. NORTHEAST WINDS
AROUND 5 MPH, BECOMING SOUTHEAST IN THE AFTERNOON.
SATURDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 50S. NORTH
WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
SUNDAY
MOSTLY SUNNY. HIGHS AROUND 80. SOUTHWEST WINDS AROUND
5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. SOUTHEAST
WINDS AROUND 5 MPH.
ILZ004-182115-
BOONE-
INCLUDING THE CITY OF BELVIDERE
443 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLDY MCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 70 70 50
MAX TEMP (24HR TREND) 81 (-3) 76
MIN RH % (24HR TREND) 64 (+15) 52
MIN TEMP (24HR TREND) 65 (-1) 46
MAX RH % (24HR TREND) 94 (+12) 82
20FT WIND AM (MPH) S 10-15 SW 15-20
20FT WIND PM (MPH) SW 10-15 S 15-20 W 15-20 NW 9-10
PEAK WIND GUSTS (MPH) 27 28 30 19
PRECIP AMOUNT (IN) 0.05-0.10 0.05-0.10 0.01-0.05 0.00
11 AM MIXING HGT (FT) 1900 3000
MAX MIXING HGT (FT) 2900 3700
TRANSPORT WND (MPH) SW 21 W 21
VENT RATE (MPH-FT) 63800 81400
VENT RATE CATEGORY FAIR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 60S. NORTH WINDS
AROUND 10 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 40. NORTHEAST WINDS
5 TO 10 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 60S. EAST WINDS
AROUND 10 MPH.
THURSDAY NIGHT
MOSTLY CLOUDY. LOWS IN THE MID 40S. EAST WINDS
5 TO 10 MPH.
FRIDAY
MOSTLY CLOUDY. HIGHS IN THE UPPER 60S. EAST WINDS
AROUND 10 MPH.
FRIDAY NIGHT
MOSTLY CLOUDY. LOWS IN THE UPPER 40S. EAST WINDS
AROUND 5 MPH.
SATURDAY
PARTLY SUNNY. HIGHS IN THE MID 70S. EAST WINDS AROUND
5 MPH, BECOMING SOUTH IN THE AFTERNOON.
SATURDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN CLEARING.
LOWS IN THE LOWER 50S. WEST WINDS AROUND 5 MPH IN THE EVENING,
BECOMING LIGHT.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 80S. SOUTH WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. SOUTHEAST
WINDS AROUND 5 MPH.
ILZ011-182115-
DE KALB-
INCLUDING THE CITIES OF DEKALB AND SYCAMORE
443 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLDY PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 70 60 50
MAX TEMP (24HR TREND) 81 (-4) 77
MIN RH % (24HR TREND) 64 (+13) 54
MIN TEMP (24HR TREND) 64 (-2) 46
MAX RH % (24HR TREND) 95 (+14) 81
20FT WIND AM (MPH) S 15-20 SW 15-20
20FT WIND PM (MPH) SW 15-20 S 15-20 W 15-20 NW 10-11
PEAK WIND GUSTS (MPH) 27 29 31 19
PRECIP AMOUNT (IN) 0.10-0.25 0.05-0.10 0.01-0.05 0.00
11 AM MIXING HGT (FT) 1700 3200
MAX MIXING HGT (FT) 2900 3600
TRANSPORT WND (MPH) SW 24 W 21
VENT RATE (MPH-FT) 69600 79200
VENT RATE CATEGORY FAIR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE MID 60S. NORTH WINDS
AROUND 10 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 40S.
NORTHEAST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE MID 60S. EAST WINDS AROUND
10 MPH.
THURSDAY NIGHT
MOSTLY CLOUDY. LOWS IN THE MID 40S. EAST WINDS
AROUND 10 MPH.
FRIDAY
MOSTLY CLOUDY. HIGHS IN THE UPPER 60S. EAST WINDS
AROUND 10 MPH.
FRIDAY NIGHT
MOSTLY CLOUDY. LOWS AROUND 50. EAST WINDS AROUND
5 MPH.
SATURDAY
PARTLY SUNNY. HIGHS IN THE MID 70S. NORTHEAST WINDS
AROUND 5 MPH, BECOMING SOUTH IN THE AFTERNOON.
SATURDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN CLEARING.
LOWS IN THE LOWER 50S. WEST WINDS AROUND 5 MPH, BECOMING
SOUTHWEST AFTER MIDNIGHT.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 80S. NORTH WINDS
AROUND 5 MPH, BECOMING SOUTH IN THE AFTERNOON.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. SOUTHEAST
WINDS AROUND 5 MPH.
ILZ003-182115-
WINNEBAGO-
INCLUDING THE CITY OF ROCKFORD
443 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLDY MCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 70 70 40
MAX TEMP (24HR TREND) 81 (-3) 76
MIN RH % (24HR TREND) 61 (+10) 48
MIN TEMP (24HR TREND) 65 (-2) 45
MAX RH % (24HR TREND) 94 (+11) 80
20FT WIND AM (MPH) S 10-15 SW 15-20
20FT WIND PM (MPH) SW 10-15 S 15-20 W 15-20 NW 9-10
PEAK WIND GUSTS (MPH) 26 29 29 19
PRECIP AMOUNT (IN) 0.05-0.10 0.10-0.25 0.01-0.05 0.00
11 AM MIXING HGT (FT) 1900 2800
MAX MIXING HGT (FT) 3100 3700
TRANSPORT WND (MPH) SW 23 NW 23
VENT RATE (MPH-FT) 71300 85100
VENT RATE CATEGORY FAIR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE MID 60S. NORTH WINDS
AROUND 10 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 40. NORTHEAST WINDS
AROUND 5 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE MID 60S. EAST WINDS AROUND
10 MPH.
THURSDAY NIGHT
MOSTLY CLOUDY. LOWS IN THE MID 40S. EAST WINDS
5 TO 10 MPH.
FRIDAY
PARTLY SUNNY. HIGHS IN THE UPPER 60S. EAST WINDS AROUND
10 MPH.
FRIDAY NIGHT
MOSTLY CLOUDY. LOWS IN THE UPPER 40S. EAST WINDS
AROUND 5 MPH.
SATURDAY
PARTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHEAST WINDS
AROUND 5 MPH, BECOMING SOUTH IN THE AFTERNOON.
SATURDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN CLEARING.
LOWS IN THE LOWER 50S. WEST WINDS AROUND 5 MPH IN THE EVENING,
BECOMING LIGHT.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 80S. SOUTH WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. SOUTHEAST
WINDS AROUND 5 MPH.
ILZ008-182115-
OGLE-
INCLUDING THE CITIES OF ROCHELLE, OREGON, AND BYRON
443 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLDY PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 70 70 50
MAX TEMP (24HR TREND) 81 (-4) 76
MIN RH % (24HR TREND) 63 (+13) 49
MIN TEMP (24HR TREND) 64 (-2) 46
MAX RH % (24HR TREND) 95 (+10) 80
20FT WIND AM (MPH) S 10-15 SW 15-20
20FT WIND PM (MPH) SW 10-15 S 15-20 W 15-20 NW 9-10
PEAK WIND GUSTS (MPH) 27 29 30 19
PRECIP AMOUNT (IN) 0.10-0.25 0.10-0.25 0.01-0.05 0.00
11 AM MIXING HGT (FT) 1800 2800
MAX MIXING HGT (FT) 2900 3700
TRANSPORT WND (MPH) SW 21 NW 21
VENT RATE (MPH-FT) 63800 81400
VENT RATE CATEGORY FAIR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE MID 60S. NORTH WINDS
AROUND 10 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 40S.
NORTHEAST WINDS AROUND 5 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE MID 60S. EAST WINDS AROUND
10 MPH.
THURSDAY NIGHT
MOSTLY CLOUDY. LOWS IN THE MID 40S. EAST WINDS
5 TO 10 MPH.
FRIDAY
MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE MORNING.
HIGHS AROUND 70. EAST WINDS AROUND 10 MPH.
FRIDAY NIGHT
MOSTLY CLOUDY. LOWS AROUND 50. EAST WINDS AROUND
5 MPH.
SATURDAY
PARTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHEAST WINDS
AROUND 5 MPH, BECOMING SOUTH IN THE AFTERNOON.
SATURDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN CLEARING.
LOWS IN THE LOWER 50S. WEST WINDS AROUND 5 MPH IN THE EVENING,
BECOMING LIGHT.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 80S. EAST WINDS AROUND
5 MPH, BECOMING SOUTH IN THE AFTERNOON.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. SOUTH WINDS
AROUND 5 MPH.
ILZ010-182115-
LEE-
INCLUDING THE CITY OF DIXON
443 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLDY PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 70 70 50
MAX TEMP (24HR TREND) 81 (-4) 76
MIN RH % (24HR TREND) 63 (+15) 52
MIN TEMP (24HR TREND) 64 (-2) 47
MAX RH % (24HR TREND) 96 (+12) 82
20FT WIND AM (MPH) S 10-15 SW 15-20
20FT WIND PM (MPH) SW 10-15 S 15-20 W 15-20 NW 10-11
PEAK WIND GUSTS (MPH) 27 28 30 19
PRECIP AMOUNT (IN) 0.10-0.25 0.10-0.25 0.01-0.05 0.00
11 AM MIXING HGT (FT) 1800 3000
MAX MIXING HGT (FT) 2900 3800
TRANSPORT WND (MPH) SW 24 W 21
VENT RATE (MPH-FT) 69600 83600
VENT RATE CATEGORY FAIR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE MID 60S. NORTH WINDS
AROUND 10 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 40S.
NORTHEAST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE MID 60S. EAST WINDS AROUND
10 MPH.
THURSDAY NIGHT
MOSTLY CLOUDY. LOWS IN THE UPPER 40S. EAST
WINDS AROUND 10 MPH.
FRIDAY
MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE MORNING.
HIGHS AROUND 70. EAST WINDS AROUND 10 MPH.
FRIDAY NIGHT
MOSTLY CLOUDY. LOWS IN THE LOWER 50S. EAST WINDS
AROUND 5 MPH.
SATURDAY
PARTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHEAST WINDS
AROUND 5 MPH, BECOMING SOUTH IN THE AFTERNOON.
SATURDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN CLEARING.
LOWS IN THE MID 50S. WEST WINDS AROUND 5 MPH, BECOMING SOUTH
AFTER MIDNIGHT.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 80S. NORTH WINDS
AROUND 5 MPH, BECOMING SOUTH IN THE AFTERNOON.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. SOUTH WINDS
AROUND 5 MPH.
ILZ019-182115-
LA SALLE-
INCLUDING THE CITIES OF OTTAWA, STREATOR, LA SALLE, MENDOTA,
AND MARSEILLES
443 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLDY PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 70 60 60 10
MAX TEMP (24HR TREND) 81 (-5) 80
MIN RH % (24HR TREND) 63 (+14) 53
MIN TEMP (24HR TREND) 66 (-2) 49
MAX RH % (24HR TREND) 90 (+15) 77
20FT WIND AM (MPH) SW 10-15 SW 15-20
20FT WIND PM (MPH) SW 10-15 S 10-15 W 15-20 NW 9-10
PEAK WIND GUSTS (MPH) 27 27 30 19
PRECIP AMOUNT (IN) 0.25-0.50 0.05-0.10 0.01-0.05 0.00
11 AM MIXING HGT (FT) 1800 3000
MAX MIXING HGT (FT) 2500 3600
TRANSPORT WND (MPH) SW 24 W 26
VENT RATE (MPH-FT) 60000 93600
VENT RATE CATEGORY FAIR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE MID 60S. NORTH WINDS
AROUND 10 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 40S. NORTHEAST
WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 60S. EAST WINDS
AROUND 10 MPH.
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE UPPER 40S. EAST WINDS AROUND 10 MPH.
FRIDAY
MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE MORNING.
HIGHS IN THE LOWER 70S. EAST WINDS AROUND 10 MPH.
FRIDAY NIGHT
MOSTLY CLOUDY. A CHANCE OF SHOWERS AFTER
MIDNIGHT. LOWS IN THE LOWER 50S. EAST WINDS AROUND 5 MPH.
SATURDAY
PARTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHEAST WINDS
AROUND 5 MPH, BECOMING SOUTH IN THE AFTERNOON.
SATURDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. WEST WINDS
AROUND 5 MPH, BECOMING SOUTH AFTER MIDNIGHT.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 80S. NORTH WINDS
AROUND 5 MPH, BECOMING SOUTH IN THE AFTERNOON.
SUNDAY NIGHT
PARTLY CLOUDY. A CHANCE OF SHOWERS IN THE
EVENING. LOWS IN THE UPPER 50S. SOUTH WINDS AROUND 5 MPH.
ILZ020-182115-
KENDALL-
INCLUDING THE CITIES OF OSWEGO, YORKVILLE, AND PLANO
443 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLDY PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 70 50 60 10
MAX TEMP (24HR TREND) 81 (-6) 79
MIN RH % (24HR TREND) 67 (+20) 58
MIN TEMP (24HR TREND) 65 (-3) 48
MAX RH % (24HR TREND) 94 (+18) 81
20FT WIND AM (MPH) SW 10-15 SW 15-20
20FT WIND PM (MPH) SW 10-15 S 10-15 W 15-20 NW 9-10
PEAK WIND GUSTS (MPH) 28 26 30 19
PRECIP AMOUNT (IN) 0.25-0.50 0.05-0.10 0.01-0.05 0.00
11 AM MIXING HGT (FT) 1700 3000
MAX MIXING HGT (FT) 2400 3800
TRANSPORT WND (MPH) SW 23 SW 27
VENT RATE (MPH-FT) 55200 106400
VENT RATE CATEGORY FAIR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE MID 60S. NORTH WINDS
AROUND 10 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 40S.
NORTHEAST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE MID 60S. EAST WINDS AROUND
10 MPH.
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE UPPER 40S. EAST WINDS 5 TO 10 MPH.
FRIDAY
MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE MORNING.
HIGHS IN THE LOWER 70S. EAST WINDS AROUND 10 MPH.
FRIDAY NIGHT
MOSTLY CLOUDY. LOWS IN THE LOWER 50S. EAST WINDS
AROUND 5 MPH.
SATURDAY
PARTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHEAST WINDS
AROUND 5 MPH, BECOMING SOUTH IN THE AFTERNOON.
SATURDAY NIGHT
MOSTLY CLOUDY IN THE EVENING THEN CLEARING.
LOWS IN THE MID 50S. WEST WINDS AROUND 5 MPH, BECOMING SOUTHWEST
AFTER MIDNIGHT.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 80S. SOUTH WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. SOUTH WINDS
AROUND 5 MPH.
ILZ021-182115-
GRUNDY-
INCLUDING THE CITIES OF MORRIS, COAL CITY, AND MINOOKA
443 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLDY PCLDY MCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 70 50 70 10
MAX TEMP (24HR TREND) 81 (-6) 81
MIN RH % (24HR TREND) 68 (+22) 59
MIN TEMP (24HR TREND) 67 (-2) 50
MAX RH % (24HR TREND) 90 (+16) 80
20FT WIND AM (MPH) SW 10-15 SW 15-20
20FT WIND PM (MPH) SW 10-15 S 10-15 W 15-20 NW 9-10
PEAK WIND GUSTS (MPH) 29 26 30 18
PRECIP AMOUNT (IN) 0.25-0.50 0.01-0.05 0.01-0.05 0.00
11 AM MIXING HGT (FT) 1800 3200
MAX MIXING HGT (FT) 2300 3800
TRANSPORT WND (MPH) SW 23 W 28
VENT RATE (MPH-FT) 52900 110200
VENT RATE CATEGORY FAIR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE MID 60S. NORTH WINDS
AROUND 10 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 40S. NORTHEAST
WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 60S. EAST WINDS
AROUND 10 MPH.
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE UPPER 40S. EAST WINDS 5 TO 10 MPH.
FRIDAY
MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE MORNING.
HIGHS IN THE LOWER 70S. EAST WINDS 5 TO 10 MPH.
FRIDAY NIGHT
MOSTLY CLOUDY. A CHANCE OF SHOWERS AFTER
MIDNIGHT. LOWS IN THE MID 50S. EAST WINDS AROUND 5 MPH.
SATURDAY
PARTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHEAST WINDS
AROUND 5 MPH, BECOMING SOUTHWEST IN THE AFTERNOON.
SATURDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. WEST WINDS
AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 80S. NORTH WINDS
AROUND 5 MPH, BECOMING SOUTH IN THE AFTERNOON.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. SOUTHEAST WINDS
AROUND 5 MPH.
ILZ022-182115-
WILL-
INCLUDING THE CITIES OF JOLIET, BOLINGBROOK, AND WILMINGTON
443 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLDY PCLDY MCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 70 40 70 20
MAX TEMP (24HR TREND) 80 (-7) 81
MIN RH % (24HR TREND) 69 (+21) 63
MIN TEMP (24HR TREND) 66 (-2) 49
MAX RH % (24HR TREND) 93 (+21) 82
20FT WIND AM (MPH) SW 10-15 SW 15-20
20FT WIND PM (MPH) SW 10-15 S 10-15 W 15-20 NW 9-10
PEAK WIND GUSTS (MPH) 29 28 29 19
PRECIP AMOUNT (IN) 0.25-0.50 0.01-0.05 0.05-0.10 0.01-0.05
11 AM MIXING HGT (FT) 2400 3100
MAX MIXING HGT (FT) 2400 4000
TRANSPORT WND (MPH) S 23 W 29
VENT RATE (MPH-FT) 55200 120000
VENT RATE CATEGORY FAIR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 60S. NORTH WINDS
AROUND 10 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 40S.
NORTHEAST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE MID 60S. EAST WINDS AROUND
10 MPH.
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE UPPER 40S. NORTHEAST WINDS 5 TO
10 MPH.
FRIDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. HIGHS IN THE
LOWER 70S. EAST WINDS AROUND 10 MPH.
FRIDAY NIGHT
MOSTLY CLOUDY. A CHANCE OF SHOWERS AFTER
MIDNIGHT. LOWS IN THE LOWER 50S. EAST WINDS AROUND 5 MPH.
SATURDAY
PARTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHEAST WINDS
AROUND 5 MPH, BECOMING SOUTHWEST IN THE AFTERNOON.
SATURDAY NIGHT
MOSTLY CLOUDY IN THE EVENING, THEN BECOMING
PARTLY CLOUDY. LOWS IN THE MID 50S. WEST WINDS AROUND 5 MPH.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 80S. NORTH WINDS
AROUND 5 MPH, BECOMING SOUTH IN THE AFTERNOON.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. SOUTHEAST
WINDS AROUND 5 MPH.
ILZ032-182115-
LIVINGSTON-
INCLUDING THE CITIES OF PONTIAC, DWIGHT, AND FAIRBURY
443 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLDY PCLDY MCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 70 50 70 20
MAX TEMP (24HR TREND) 81 (-6) 82
MIN RH % (24HR TREND) 67 (+19) 60
MIN TEMP (24HR TREND) 67 (-2) 51
MAX RH % (24HR TREND) 92 (+17) 83
20FT WIND AM (MPH) SW 10-15 SW 15-20
20FT WIND PM (MPH) SW 10-15 S 10-15 W 15-20 NW 9-10
PEAK WIND GUSTS (MPH) 28 27 30 18
PRECIP AMOUNT (IN) 0.25-0.50 0.01-0.05 0.05-0.10 0.01-0.05
11 AM MIXING HGT (FT) 2000 3000
MAX MIXING HGT (FT) 2200 4000
TRANSPORT WND (MPH) SW 25 W 27
VENT RATE (MPH-FT) 55000 112000
VENT RATE CATEGORY FAIR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 60S. NORTH WINDS
AROUND 10 MPH.
WEDNESDAY NIGHT
MOSTLY CLOUDY IN THE EVENING, THEN BECOMING
PARTLY CLOUDY. LOWS IN THE LOWER 40S. NORTHEAST WINDS 5 TO
10 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS AROUND 70. NORTHEAST WINDS AROUND
10 MPH.
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE UPPER 40S. EAST WINDS AROUND 10 MPH.
FRIDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. HIGHS IN THE
MID 70S. EAST WINDS AROUND 10 MPH.
FRIDAY NIGHT
MOSTLY CLOUDY. A CHANCE OF SHOWERS AFTER
MIDNIGHT. LOWS IN THE MID 50S. EAST WINDS AROUND 5 MPH.
SATURDAY
PARTLY SUNNY. HIGHS AROUND 80. NORTH WINDS AROUND
5 MPH, BECOMING SOUTHWEST IN THE AFTERNOON.
SATURDAY NIGHT
MOSTLY CLOUDY IN THE EVENING, THEN BECOMING
PARTLY CLOUDY. LOWS IN THE UPPER 50S. WEST WINDS AROUND 5 MPH,
BECOMING SOUTH AFTER MIDNIGHT.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 80S. SOUTH WINDS AROUND
5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. SOUTH WINDS AROUND
5 MPH.
ILZ023-182115-
KANKAKEE-
INCLUDING THE CITIES OF KANKAKEE, BOURBONNAIS, AND BRADLEY
443 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLDY PCLDY MCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 70 40 70 20
MAX TEMP (24HR TREND) 81 (-6) 82
MIN RH % (24HR TREND) 67 (+21) 62
MIN TEMP (24HR TREND) 65 (-3) 49
MAX RH % (24HR TREND) 93 (+21) 85
20FT WIND AM (MPH) SW 10-15 SW 15-20
20FT WIND PM (MPH) SW 10-15 S 10-15 W 15-20 NW 9-10
PEAK WIND GUSTS (MPH) 28 27 29 18
PRECIP AMOUNT (IN) 0.25-0.50 0.01-0.05 0.10-0.25 0.01-0.05
11 AM MIXING HGT (FT) 2700 3100
MAX MIXING HGT (FT) 2700 4200
TRANSPORT WND (MPH) S 24 SW 28
VENT RATE (MPH-FT) 64800 121800
VENT RATE CATEGORY FAIR VERY GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 60S. NORTH WINDS
AROUND 10 MPH.
WEDNESDAY NIGHT
MOSTLY CLOUDY IN THE EVENING, THEN BECOMING
PARTLY CLOUDY. LOWS IN THE LOWER 40S. NORTHEAST WINDS 5 TO
10 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 60S. EAST WINDS
AROUND 10 MPH.
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE UPPER 40S. EAST WINDS 5 TO 10 MPH.
FRIDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. HIGHS IN THE
LOWER 70S. EAST WINDS AROUND 5 MPH.
FRIDAY NIGHT
MOSTLY CLOUDY. A CHANCE OF SHOWERS AFTER
MIDNIGHT. LOWS IN THE LOWER 50S. EAST WINDS AROUND 5 MPH.
SATURDAY
PARTLY SUNNY. HIGHS IN THE UPPER 70S. EAST WINDS
AROUND 5 MPH, BECOMING SOUTHWEST IN THE AFTERNOON.
SATURDAY NIGHT
MOSTLY CLOUDY IN THE EVENING, THEN BECOMING
PARTLY CLOUDY. LOWS IN THE MID 50S. WEST WINDS AROUND 5 MPH IN
THE EVENING, BECOMING LIGHT.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 80S. SOUTH WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. SOUTH WINDS
AROUND 5 MPH.
ILZ039-182115-
FORD-
INCLUDING THE CITIES OF PAXTON AND GIBSON CITY
443 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLDY PCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 70 40 70 30
MAX TEMP (24HR TREND) 81 (-5) 82
MIN RH % (24HR TREND) 66 (+18) 64
MIN TEMP (24HR TREND) 67 (-1) 51
MAX RH % (24HR TREND) 92 (+19) 82
20FT WIND AM (MPH) SW 15-20 SW 15-20
20FT WIND PM (MPH) SW 15-20 S 10-15 W 15-20 NW 10
PEAK WIND GUSTS (MPH) 29 28 31 17
PRECIP AMOUNT (IN) 0.25-0.50 0.01-0.05 0.10-0.25 0.01-0.05
11 AM MIXING HGT (FT) 2200 2800
MAX MIXING HGT (FT) 2300 4000
TRANSPORT WND (MPH) SW 27 SW 26
VENT RATE (MPH-FT) 64400 104000
VENT RATE CATEGORY FAIR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
PARTLY SUNNY. HIGHS IN THE MID 60S. NORTH WINDS
AROUND 10 MPH.
WEDNESDAY NIGHT
MOSTLY CLOUDY IN THE EVENING, THEN BECOMING
PARTLY CLOUDY. LOWS IN THE LOWER 40S. NORTHEAST WINDS AROUND
10 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 60S. NORTHEAST WINDS
AROUND 10 MPH.
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE UPPER 40S. EAST WINDS AROUND 10 MPH.
FRIDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. HIGHS IN THE
LOWER 70S. EAST WINDS AROUND 10 MPH.
FRIDAY NIGHT
MOSTLY CLOUDY. A CHANCE OF SHOWERS AFTER
MIDNIGHT. LOWS IN THE MID 50S. EAST WINDS AROUND 5 MPH.
SATURDAY
PARTLY SUNNY WITH A CHANCE OF SHOWERS. HIGHS IN THE
UPPER 70S. NORTHWEST WINDS AROUND 5 MPH, BECOMING SOUTHWEST IN
THE AFTERNOON.
SATURDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. SOUTHWEST
WINDS AROUND 5 MPH.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 80S. SOUTH WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. SOUTH WINDS AROUND
5 MPH.
ILZ033-182115-
IROQUOIS-
INCLUDING THE CITIES OF WATSEKA AND GILMAN
443 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLDY PCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 70 40 70 40
MAX TEMP (24HR TREND) 81 (-5) 83
MIN RH % (24HR TREND) 63 (+11) 62
MIN TEMP (24HR TREND) 66 (-2) 51
MAX RH % (24HR TREND) 89 (+18) 81
20FT WIND AM (MPH) SW 10-15 SW 15-20
20FT WIND PM (MPH) SW 10-15 S 10-15 W 15-20 NW 9-10
PEAK WIND GUSTS (MPH) 28 27 28 18
PRECIP AMOUNT (IN) 0.25-0.50 0.01-0.05 0.10-0.25 0.01-0.05
11 AM MIXING HGT (FT) 2900 2800
MAX MIXING HGT (FT) 2900 4100
TRANSPORT WND (MPH) SW 26 SW 26
VENT RATE (MPH-FT) 75400 106600
VENT RATE CATEGORY GOOD GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
PARTLY SUNNY. HIGHS IN THE MID 60S. NORTH WINDS
AROUND 10 MPH.
WEDNESDAY NIGHT
MOSTLY CLOUDY IN THE EVENING, THEN BECOMING
PARTLY CLOUDY. LOWS IN THE LOWER 40S. NORTHEAST WINDS 5 TO
10 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 60S. NORTHEAST WINDS
AROUND 10 MPH.
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE UPPER 40S. EAST WINDS AROUND 5 MPH.
FRIDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. HIGHS IN THE
LOWER 70S. EAST WINDS AROUND 5 MPH.
FRIDAY NIGHT
MOSTLY CLOUDY. A CHANCE OF SHOWERS AFTER
MIDNIGHT. LOWS IN THE MID 50S. EAST WINDS AROUND 5 MPH IN THE
EVENING, BECOMING LIGHT.
SATURDAY
PARTLY SUNNY WITH A CHANCE OF SHOWERS. HIGHS IN THE
UPPER 70S. NORTH WINDS AROUND 5 MPH, BECOMING SOUTHWEST IN THE
AFTERNOON.
SATURDAY NIGHT
MOSTLY CLOUDY IN THE EVENING, THEN BECOMING
PARTLY CLOUDY. LOWS IN THE MID 50S. SOUTHWEST WINDS AROUND 5 MPH
IN THE EVENING, BECOMING LIGHT.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 80S. SOUTH WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. SOUTH WINDS AROUND
5 MPH.
INZ010-182115-
NEWTON-
INCLUDING THE CITIES OF ROSELAWN, KENTLAND, AND MOROCCO
443 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLDY PCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 70 30 70 40
MAX TEMP (24HR TREND) 81 (-5) 82
MIN RH % (24HR TREND) 65 (+18) 63
MIN TEMP (24HR TREND) 66 (-1) 50
MAX RH % (24HR TREND) 93 (+20) 85
20FT WIND AM (MPH) SW 10-15 SW 15-20
20FT WIND PM (MPH) SW 10-15 S 10-15 SW 15-20 NW 9-10
PEAK WIND GUSTS (MPH) 28 28 29 19
PRECIP AMOUNT (IN) 0.25-0.50 0.01-0.05 0.10-0.25 0.01-0.05
11 AM MIXING HGT (FT) 2900 2900
MAX MIXING HGT (FT) 2900 4200
TRANSPORT WND (MPH) SW 27 SW 26
VENT RATE (MPH-FT) 81200 109200
VENT RATE CATEGORY GOOD GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
PARTLY SUNNY. HIGHS IN THE LOWER 60S. NORTH WINDS
10 TO 15 MPH.
WEDNESDAY NIGHT
MOSTLY CLOUDY IN THE EVENING, THEN BECOMING
PARTLY CLOUDY. LOWS IN THE LOWER 40S. NORTH WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 60S. EAST WINDS
AROUND 10 MPH.
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE UPPER 40S. EAST WINDS AROUND 5 MPH.
FRIDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. HIGHS IN THE
LOWER 70S. EAST WINDS AROUND 5 MPH.
FRIDAY NIGHT
MOSTLY CLOUDY. LOWS IN THE LOWER 50S. EAST WINDS
AROUND 5 MPH.
SATURDAY
PARTLY SUNNY WITH A CHANCE OF SHOWERS. HIGHS IN THE
UPPER 70S. SOUTHEAST WINDS AROUND 5 MPH, BECOMING SOUTHWEST IN
THE AFTERNOON.
SATURDAY NIGHT
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS IN THE
EVENING, THEN PARTLY CLOUDY AFTER MIDNIGHT. LOWS IN THE MID 50S.
SOUTHWEST WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 80S. SOUTHWEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. SOUTH WINDS
AROUND 5 MPH.
INZ011-182115-
JASPER-
INCLUDING THE CITIES OF RENSSELAER AND DEMOTTE
443 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLDY PCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 70 30 70 50
MAX TEMP (24HR TREND) 81 (-4) 82
MIN RH % (24HR TREND) 64 (+20) 64
MIN TEMP (24HR TREND) 66 (-1) 50
MAX RH % (24HR TREND) 92 (+19) 85
20FT WIND AM (MPH) SW 10-15 SW 15-20
20FT WIND PM (MPH) SW 10-15 S 10-15 SW 15-20 NW 9-10
PEAK WIND GUSTS (MPH) 27 28 29 20
PRECIP AMOUNT (IN) 0.25-0.50 0.01-0.05 0.10-0.25 0.01-0.05
11 AM MIXING HGT (FT) 2800 2900
MAX MIXING HGT (FT) 3100 4200
TRANSPORT WND (MPH) SW 26 SW 26
VENT RATE (MPH-FT) 80600 109200
VENT RATE CATEGORY GOOD GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
PARTLY SUNNY. HIGHS IN THE LOWER 60S. NORTH WINDS
10 TO 15 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 40S. NORTH
WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE MID 60S. EAST WINDS AROUND
10 MPH.
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE UPPER 40S. EAST WINDS 5 TO 10 MPH.
FRIDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. HIGHS IN THE
LOWER 70S. EAST WINDS AROUND 5 MPH.
FRIDAY NIGHT
A CHANCE OF SHOWERS IN THE EVENING. MOSTLY
CLOUDY. LOWS IN THE MID 50S. EAST WINDS AROUND 5 MPH.
SATURDAY
PARTLY SUNNY WITH A CHANCE OF SHOWERS. HIGHS IN THE
MID 70S. SOUTHEAST WINDS AROUND 5 MPH, BECOMING SOUTHWEST IN THE
AFTERNOON.
SATURDAY NIGHT
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS IN THE
EVENING, THEN PARTLY CLOUDY AFTER MIDNIGHT. LOWS IN THE MID 50S.
SOUTHWEST WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
SUNDAY
MOSTLY SUNNY. HIGHS AROUND 80. SOUTHWEST WINDS AROUND
5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. SOUTH WINDS
AROUND 5 MPH.
INZ019-182115-
BENTON-
INCLUDING THE CITIES OF FOWLER AND OXFORD
543 AM EDT MON MAY 18 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER PCLDY PCLDY PCLDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 70 20 70 60
MAX TEMP (24HR TREND) 81 (-3) 82
MIN RH % (24HR TREND) 64 (+12) 64
MIN TEMP (24HR TREND) 67 (+1) 53
MAX RH % (24HR TREND) 88 (+14) 80
20FT WIND AM (MPH) SW 10-15 SW 15-20
20FT WIND PM (MPH) SW 10-15 S 10-15 SW 15-20 NW 9
PEAK WIND GUSTS (MPH) 28 28 29 20
PRECIP AMOUNT (IN) 0.25-0.50 0.01-0.05 0.10-0.25 0.05-0.10
11 AM MIXING HGT (FT) 2900 2400
MAX MIXING HGT (FT) 2900 3400
TRANSPORT WND (MPH) SW 27 SW 26
VENT RATE (MPH-FT) 81200 88400
VENT RATE CATEGORY GOOD GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
PARTLY SUNNY. HIGHS IN THE MID 60S. NORTH WINDS
10 TO 15 MPH.
WEDNESDAY NIGHT
MOSTLY CLOUDY IN THE EVENING, THEN BECOMING
PARTLY CLOUDY. LOWS IN THE MID 40S. NORTH WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 60S. EAST WINDS
AROUND 10 MPH.
THURSDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE UPPER 40S. EAST WINDS AROUND 5 MPH.
FRIDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. HIGHS IN THE
LOWER 70S. EAST WINDS AROUND 5 MPH.
FRIDAY NIGHT
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS IN
THE MID 50S. EAST WINDS AROUND 5 MPH.
SATURDAY
A CHANCE OF SHOWERS IN THE MORNING. MOSTLY CLOUDY.
HIGHS IN THE UPPER 70S. SOUTHEAST WINDS AROUND 5 MPH, BECOMING
SOUTHWEST IN THE AFTERNOON.
SATURDAY NIGHT
PARTLY CLOUDY. A CHANCE OF SHOWERS IN THE
EVENING. LOWS IN THE UPPER 50S. SOUTHWEST WINDS AROUND 5 MPH.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 80S. SOUTHWEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE LOWER 60S. SOUTH WINDS AROUND 5 MPH.
RATZER
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