504
FNUS53 KLOT 170953
FWFLOT
FIRE WEATHER PLANNING FORECAST FOR NORTHERN IL AND NORTHWEST IN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
453 AM CDT MON AUG 17 2026
DISCUSSION
A LAKE ENHANCED FRONT WILL MOVE INLAND THIS MORNING AND STALL OUT
NEAR THE I-294 TO I-355 CORRIDOR IN ILLINOIS AND NEAR THE
ILLINOIS-INDIANA STATE LINE FOR AREAS SOUTH OF I-80. A FEW
SHOWERS MAY DEVELOP ALONG THE BOUNDARY THIS MORNING INTO THE
AFTERNOON THOUGH MOST AREAS ARE EXPECTED TO REMAIN DRY TODAY.
INLAND OF THE BOUNDARY, WINDS WILL BE OUT OF THE NORTHWEST AND
DEEPER MIXING MAY ALLOW RELATIVE HUMIDITY VALUES TO DROP INTO THE
45 TO 55 PERCENT RANGE IN THE AFTERNOON. HIGHER HUMIDITY AND LOWER
MIXING HEIGHTS ARE EXPECTED EAST OF THE BOUNDARY AND NEAR THE
LAKE WITH WINDS OUT OF THE NORTH TO NORTHEAST.
A SLOW MOVING COLD FRONT WILL BRING THE POTENTIAL FOR SHOWERS AND
THUNDERSTORMS TUESDAY AFTERNOON AND NIGHT, SOME OF WHICH COULD BE
STRONG TO SEVERE. TORRENTIAL RAINFALL MAY ALSO LEAD TO LOCALIZED
FLOODING.
COOLER AND DRY CONDITIONS ARE THEN IN STORE WEDNESDAY AFTERNOON
THROUGH THURSDAY WITH SHOWER AND STORM CHANCES RETURNING HEADING
INTO THE WEEKEND.
ILZ014-172200-
COOK-
INCLUDING THE CITIES OF CHICAGO, SCHAUMBURG, EVANSTON, OAK LAWN,
LEMONT, ORLAND PARK, AND PARK FOREST
453 AM CDT MON AUG 17 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER PCLDY MCLEAR PCLDY MCLDY
PRECIP TYPE SHOWERS NONE TSTMS TSTMS
CHANCE PRECIP (%) 20 10 50 70
MAX TEMP (24HR TREND) 77 (-8) 80
MIN RH % (24HR TREND) 59 (-8) 63
MIN TEMP (24HR TREND) 63 (-5) 65
MAX RH % (24HR TREND) 94 (+11) 100
20FT WIND AM (MPH) N 7 SW 6-9
20FT WIND PM (MPH) NE 7 LGT/VAR SW 6-9 LGT/VAR
PEAK WIND GUSTS (MPH) 18
PRECIP AMOUNT (IN) 0.01-0.05 0.00 0.05-0.10 0.25-0.50
11 AM MIXING HGT (FT) 3200 2800
MAX MIXING HGT (FT) 4000 3800
TRANSPORT WND (MPH) NE 9 SW 13
VENT RATE (MPH-FT) 36000 53200
VENT RATE CATEGORY POOR FAIR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
PARTLY SUNNY. HIGHS IN THE MID 70S. NORTH WINDS
AROUND 5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 60S. NORTHEAST
WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTHEAST WINDS
AROUND 5 MPH.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT
WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS,
BECOMING SOUTHWEST AROUND 5 MPH IN THE AFTERNOON.
FRIDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 60S. SOUTH WINDS
AROUND 5 MPH.
SATURDAY
MOSTLY SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE AFTERNOON. HIGHS IN THE UPPER 70S. WEST WINDS AROUND
5 MPH.
SATURDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. NORTHWEST
WINDS AROUND 5 MPH.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTH WINDS AROUND
5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT
WINDS.
ILZ006-172200-
LAKE IL-
INCLUDING THE CITIES OF WAUKEGAN, BUFFALO GROVE, MUNDELEIN,
AND GURNEE
453 AM CDT MON AUG 17 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER PCLDY MCLEAR PCLDY PCLDY
PRECIP TYPE NONE NONE TSTMS TSTMS
CHANCE PRECIP (%) 10 50 60
MAX TEMP (24HR TREND) 78 (-7) 80
MIN RH % (24HR TREND) 54 (-11) 66
MIN TEMP (24HR TREND) 62 (-4) 62
MAX RH % (24HR TREND) 93 (+9) 100
20FT WIND AM (MPH) N 6 SW 7-9
20FT WIND PM (MPH) N 6 LGT/VAR W 7-9 LGT/VAR
PEAK WIND GUSTS (MPH) 17
PRECIP AMOUNT (IN) 0.00 0.00 0.05-0.10 0.10-0.25
11 AM MIXING HGT (FT) 3500 2700
MAX MIXING HGT (FT) 5100 3600
TRANSPORT WND (MPH) N 8 W 16
VENT RATE (MPH-FT) 40800 57600
VENT RATE CATEGORY POOR FAIR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTH WINDS
AROUND 5 MPH.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS AROUND 60. LIGHT WINDS.
THURSDAY
SUNNY. HIGHS IN THE MID 70S. NORTH WINDS AROUND
5 MPH, BECOMING EAST IN THE AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS,
BECOMING SOUTH AROUND 5 MPH IN THE AFTERNOON.
FRIDAY NIGHT
PARTLY CLOUDY. A CHANCE OF SHOWERS AFTER
MIDNIGHT. LOWS IN THE LOWER 60S. SOUTHWEST WINDS AROUND 5 MPH.
SATURDAY
MOSTLY SUNNY. A CHANCE OF SHOWERS IN THE AFTERNOON.
HIGHS IN THE UPPER 70S. WEST WINDS AROUND 5 MPH.
SATURDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTH WINDS AROUND
5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
INZ001-172200-
LAKE IN-
INCLUDING THE CITIES OF GARY, HAMMOND, AND MERRILLVILLE
453 AM CDT MON AUG 17 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER PCLDY MCLEAR PCLDY MCLDY
PRECIP TYPE SHOWERS NONE TSTMS TSTMS
CHANCE PRECIP (%) 20 30 70
MAX TEMP (24HR TREND) 77 (-7) 79
MIN RH % (24HR TREND) 67 (-5) 69
MIN TEMP (24HR TREND) 61 (-7) 64
MAX RH % (24HR TREND) 95 (+2) 100
20FT WIND AM (MPH) N 7 LGT/VAR
20FT WIND PM (MPH) N 7 LGT/VAR SW 4-7 LGT/VAR
PEAK WIND GUSTS (MPH)
PRECIP AMOUNT (IN) 0.01-0.05 0.00 0.01-0.05 0.25-0.50
11 AM MIXING HGT (FT) 3100 2800
MAX MIXING HGT (FT) 3300 3600
TRANSPORT WND (MPH) N 11 SW 11
VENT RATE (MPH-FT) 39600 43200
VENT RATE CATEGORY POOR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
A CHANCE OF SHOWERS IN THE MORNING. PARTLY SUNNY.
HIGHS IN THE MID 70S. NORTHWEST WINDS AROUND 5 MPH, BECOMING
NORTH IN THE AFTERNOON.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. NORTH
WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTHEAST WINDS
AROUND 5 MPH.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. LIGHT
WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS,
BECOMING SOUTH AROUND 5 MPH IN THE AFTERNOON.
FRIDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT
WINDS.
SATURDAY
MOSTLY SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE AFTERNOON. HIGHS IN THE UPPER 70S. WEST WINDS AROUND
5 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS AROUND 60. LIGHT WINDS.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTH WINDS AROUND
5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
INZ002-172200-
PORTER-
INCLUDING THE CITIES OF PORTAGE, VALPARAISO, AND CHESTERTON
453 AM CDT MON AUG 17 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER PCLDY MCLEAR PCLDY MCLDY
PRECIP TYPE NONE NONE TSTMS TSTMS
CHANCE PRECIP (%) 10 30 70
MAX TEMP (24HR TREND) 76 (-8) 78
MIN RH % (24HR TREND) 66 (-4) 69
MIN TEMP (24HR TREND) 61 (-8) 65
MAX RH % (24HR TREND) 94 (-1) 100
20FT WIND AM (MPH) N 7 LGT/VAR
20FT WIND PM (MPH) N 7 LGT/VAR SW 4-7 LGT/VAR
PEAK WIND GUSTS (MPH)
PRECIP AMOUNT (IN) 0.00 0.00 0.01-0.05 0.25-0.50
11 AM MIXING HGT (FT) 2900 2800
MAX MIXING HGT (FT) 3200 3700
TRANSPORT WND (MPH) N 12 SW 11
VENT RATE (MPH-FT) 41600 44400
VENT RATE CATEGORY POOR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
A CHANCE OF SHOWERS IN THE MORNING. PARTLY SUNNY.
HIGHS IN THE MID 70S. NORTHWEST WINDS AROUND 5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. NORTH WINDS
AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTHEAST WINDS
AROUND 5 MPH.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. LIGHT
WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS,
BECOMING SOUTHWEST AROUND 5 MPH IN THE AFTERNOON.
FRIDAY NIGHT
MOSTLY CLEAR. LOWS AROUND 60. LIGHT WINDS,
BECOMING SOUTHWEST AROUND 5 MPH AFTER MIDNIGHT.
SATURDAY
MOSTLY SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE AFTERNOON. HIGHS IN THE MID 70S. WEST WINDS AROUND 5 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS AROUND 60. LIGHT WINDS,
BECOMING NORTHWEST AROUND 5 MPH AFTER MIDNIGHT.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 70S. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
ILZ013-172200-
DUPAGE-
INCLUDING THE CITIES OF NAPERVILLE, WHEATON, DOWNERS GROVE,
LOMBARD, AND CAROL STREAM
453 AM CDT MON AUG 17 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER PCLDY MCLEAR PCLDY MCLDY
PRECIP TYPE SHOWERS NONE TSTMS TSTMS
CHANCE PRECIP (%) 20 10 50 70
MAX TEMP (24HR TREND) 78 (-7) 79
MIN RH % (24HR TREND) 57 (-12) 67
MIN TEMP (24HR TREND) 62 (-5) 65
MAX RH % (24HR TREND) 95 (+9) 99
20FT WIND AM (MPH) N 6-7 SW 6-9
20FT WIND PM (MPH) N 6-7 LGT/VAR W 6-9 LGT/VAR
PEAK WIND GUSTS (MPH) 17
PRECIP AMOUNT (IN) 0.01-0.05 0.00 0.10-0.25 0.25-0.50
11 AM MIXING HGT (FT) 3200 2700
MAX MIXING HGT (FT) 4700 3500
TRANSPORT WND (MPH) N 8 W 13
VENT RATE (MPH-FT) 37600 49000
VENT RATE CATEGORY POOR FAIR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
PARTLY SUNNY. HIGHS IN THE UPPER 70S. NORTH WINDS
AROUND 5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S.
NORTHEAST WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHEAST WINDS
AROUND 5 MPH.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT
WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS,
BECOMING SOUTHWEST AROUND 5 MPH IN THE AFTERNOON.
FRIDAY NIGHT
PARTLY CLOUDY. A CHANCE OF SHOWERS AFTER
MIDNIGHT. LOWS IN THE LOWER 60S. SOUTHWEST WINDS AROUND 5 MPH.
SATURDAY
MOSTLY SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE AFTERNOON. HIGHS IN THE UPPER 70S. WEST WINDS 5 TO 10 MPH.
SATURDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. NORTHWEST
WINDS AROUND 5 MPH.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTH WINDS AROUND
5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. LIGHT WINDS.
ILZ012-172200-
KANE-
INCLUDING THE CITIES OF AURORA AND ELGIN
453 AM CDT MON AUG 17 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER PCLDY MCLEAR PCLDY MCLDY
PRECIP TYPE NONE NONE TSTMS TSTMS
CHANCE PRECIP (%) 10 60 70
MAX TEMP (24HR TREND) 78 (-6) 78
MIN RH % (24HR TREND) 51 (-20) 73
MIN TEMP (24HR TREND) 62 (-2) 63
MAX RH % (24HR TREND) 95 (+4) 100
20FT WIND AM (MPH) N 6-7 SW 6-9
20FT WIND PM (MPH) NW 6-7 LGT/VAR W 6-9 LGT/VAR
PEAK WIND GUSTS (MPH) 18
PRECIP AMOUNT (IN) 0.00 0.00 0.10-0.25 0.25-0.50
11 AM MIXING HGT (FT) 3800 2500
MAX MIXING HGT (FT) 5200 2900
TRANSPORT WND (MPH) NW 10 SW 13
VENT RATE (MPH-FT) 52000 40600
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
PARTLY SUNNY. HIGHS IN THE UPPER 70S. NORTH WINDS
AROUND 5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. LIGHT WINDS.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS,
BECOMING EAST AROUND 5 MPH IN THE AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS,
BECOMING SOUTHWEST AROUND 5 MPH IN THE AFTERNOON.
FRIDAY NIGHT
PARTLY CLOUDY. A CHANCE OF SHOWERS AFTER
MIDNIGHT. LOWS IN THE LOWER 60S. SOUTHWEST WINDS AROUND 5 MPH.
SATURDAY
MOSTLY SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE AFTERNOON. HIGHS IN THE UPPER 70S. WEST WINDS 5 TO 10 MPH.
SATURDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. NORTHWEST
WINDS AROUND 5 MPH.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTH WINDS AROUND
5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
ILZ005-172200-
MCHENRY-
INCLUDING THE CITIES OF CRYSTAL LAKE, ALGONQUIN, MCHENRY,
AND WOODSTOCK
453 AM CDT MON AUG 17 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER PCLDY MCLEAR PCLDY PCLDY
PRECIP TYPE NONE NONE TSTMS TSTMS
CHANCE PRECIP (%) 10 60 60
MAX TEMP (24HR TREND) 79 (-5) 78
MIN RH % (24HR TREND) 48 (-22) 71
MIN TEMP (24HR TREND) 62 (-2) 61
MAX RH % (24HR TREND) 93 (+4) 100
20FT WIND AM (MPH) N 6 SW 6-9
20FT WIND PM (MPH) NW 6 LGT/VAR W 6-9 LGT/VAR
PEAK WIND GUSTS (MPH) 18
PRECIP AMOUNT (IN) 0.00 0.00 0.10-0.25 0.10-0.25
11 AM MIXING HGT (FT) 4000 2400
MAX MIXING HGT (FT) 5600 3200
TRANSPORT WND (MPH) NW 10 W 14
VENT RATE (MPH-FT) 56000 48000
VENT RATE CATEGORY FAIR FAIR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTH WINDS
AROUND 5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
THURSDAY
SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS, BECOMING
EAST AROUND 5 MPH IN THE AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS,
BECOMING SOUTHWEST AROUND 5 MPH IN THE AFTERNOON.
FRIDAY NIGHT
PARTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS IN
THE LOWER 60S. LIGHT WINDS, BECOMING SOUTHWEST AROUND 5 MPH AFTER
MIDNIGHT.
SATURDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. WEST WINDS
AROUND 5 MPH.
SATURDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTH WINDS AROUND
5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
ILZ004-172200-
BOONE-
INCLUDING THE CITY OF BELVIDERE
453 AM CDT MON AUG 17 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLEAR MCLEAR PCLDY PCLDY
PRECIP TYPE NONE NONE TSTMS TSTMS
CHANCE PRECIP (%) 60 60
MAX TEMP (24HR TREND) 79 (-5) 78
MIN RH % (24HR TREND) 47 (-25) 72
MIN TEMP (24HR TREND) 62 (0) 61
MAX RH % (24HR TREND) 93 (0) 100
20FT WIND AM (MPH) N 6 SW 6-9
20FT WIND PM (MPH) NW 6 LGT/VAR W 6-9 LGT/VAR
PEAK WIND GUSTS (MPH) 18
PRECIP AMOUNT (IN) 0.00 0.00 0.10-0.25 0.10-0.25
11 AM MIXING HGT (FT) 4200 2300
MAX MIXING HGT (FT) 5500 3300
TRANSPORT WND (MPH) NW 10 W 14
VENT RATE (MPH-FT) 55000 49500
VENT RATE CATEGORY FAIR FAIR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS,
BECOMING NORTH AROUND 5 MPH IN THE AFTERNOON.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
THURSDAY
SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. LIGHT
WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS,
BECOMING SOUTHWEST AROUND 5 MPH IN THE AFTERNOON.
FRIDAY NIGHT
PARTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS
AROUND 60. SOUTHWEST WINDS AROUND 5 MPH.
SATURDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. WEST WINDS 5 TO
10 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. LIGHT
WINDS.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTH WINDS AROUND
5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. LIGHT WINDS.
ILZ011-172200-
DE KALB-
INCLUDING THE CITIES OF DEKALB AND SYCAMORE
453 AM CDT MON AUG 17 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLEAR MCLEAR PCLDY MCLDY
PRECIP TYPE NONE NONE TSTMS TSTMS
CHANCE PRECIP (%) 60 70
MAX TEMP (24HR TREND) 79 (-5) 78
MIN RH % (24HR TREND) 50 (-21) 72
MIN TEMP (24HR TREND) 62 (-2) 63
MAX RH % (24HR TREND) 93 (-2) 100
20FT WIND AM (MPH) N 6-7 SW 6-9
20FT WIND PM (MPH) NW 6-7 LGT/VAR W 6-9 LGT/VAR
PEAK WIND GUSTS (MPH) 18
PRECIP AMOUNT (IN) 0.00 0.00 0.10-0.25 0.10-0.25
11 AM MIXING HGT (FT) 3900 2300
MAX MIXING HGT (FT) 5300 2700
TRANSPORT WND (MPH) NW 10 SW 13
VENT RATE (MPH-FT) 53000 37800
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTH WINDS
AROUND 5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. NORTH
WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
THURSDAY
SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS, BECOMING
EAST AROUND 5 MPH IN THE AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHWEST WINDS
AROUND 5 MPH.
FRIDAY NIGHT
PARTLY CLOUDY. A CHANCE OF SHOWERS AFTER
MIDNIGHT. LOWS IN THE LOWER 60S. SOUTHWEST WINDS AROUND 5 MPH.
SATURDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. WEST WINDS 5 TO
10 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. NORTHWEST
WINDS AROUND 5 MPH.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTH WINDS AROUND
5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
ILZ003-172200-
WINNEBAGO-
INCLUDING THE CITY OF ROCKFORD
453 AM CDT MON AUG 17 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLEAR MCLEAR PCLDY PCLDY
PRECIP TYPE NONE NONE TSTMS TSTMS
CHANCE PRECIP (%) 60 60
MAX TEMP (24HR TREND) 80 (-4) 79
MIN RH % (24HR TREND) 45 (-21) 70
MIN TEMP (24HR TREND) 62 (-1) 60
MAX RH % (24HR TREND) 93 (+1) 100
20FT WIND AM (MPH) N 6 SW 7-9
20FT WIND PM (MPH) NW 6 LGT/VAR W 7-9 LGT/VAR
PEAK WIND GUSTS (MPH) 17
PRECIP AMOUNT (IN) 0.00 0.00 0.10-0.25 0.10-0.25
11 AM MIXING HGT (FT) 4200 2300
MAX MIXING HGT (FT) 5700 3400
TRANSPORT WND (MPH) NW 9 W 16
VENT RATE (MPH-FT) 51300 54400
VENT RATE CATEGORY FAIR FAIR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTH WINDS
AROUND 5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
THURSDAY
SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS, BECOMING
EAST AROUND 5 MPH IN THE AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. LIGHT
WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHWEST WINDS
AROUND 5 MPH.
FRIDAY NIGHT
PARTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS
AROUND 60. SOUTHWEST WINDS AROUND 5 MPH.
SATURDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. WEST WINDS 5 TO
10 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. NORTHWEST
WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTH WINDS AROUND
5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. LIGHT WINDS.
ILZ008-172200-
OGLE-
INCLUDING THE CITIES OF ROCHELLE, OREGON, AND BYRON
453 AM CDT MON AUG 17 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLEAR MCLEAR PCLDY PCLDY
PRECIP TYPE NONE NONE TSTMS TSTMS
CHANCE PRECIP (%) 60 60
MAX TEMP (24HR TREND) 79 (-5) 78
MIN RH % (24HR TREND) 47 (-22) 73
MIN TEMP (24HR TREND) 61 (-1) 62
MAX RH % (24HR TREND) 95 (+1) 100
20FT WIND AM (MPH) N 5-6 SW 6-9
20FT WIND PM (MPH) NW 5-6 LGT/VAR W 6-9 LGT/VAR
PEAK WIND GUSTS (MPH) 18
PRECIP AMOUNT (IN) 0.00 0.00 0.10-0.25 0.10-0.25
11 AM MIXING HGT (FT) 4100 1900
MAX MIXING HGT (FT) 5500 2800
TRANSPORT WND (MPH) NW 10 W 14
VENT RATE (MPH-FT) 55000 42000
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTH WINDS
AROUND 5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
THURSDAY
SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. LIGHT
WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHWEST WINDS
AROUND 5 MPH.
FRIDAY NIGHT
PARTLY CLOUDY. A CHANCE OF SHOWERS IN THE
EVENING. LOWS AROUND 60. SOUTHWEST WINDS AROUND 5 MPH.
SATURDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. WEST WINDS 5 TO
10 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. NORTHWEST
WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTH WINDS AROUND
5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
ILZ010-172200-
LEE-
INCLUDING THE CITY OF DIXON
453 AM CDT MON AUG 17 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLEAR MCLEAR PCLDY PCLDY
PRECIP TYPE NONE NONE TSTMS TSTMS
CHANCE PRECIP (%) 60 70
MAX TEMP (24HR TREND) 79 (-5) 78
MIN RH % (24HR TREND) 51 (-19) 73
MIN TEMP (24HR TREND) 61 (-2) 63
MAX RH % (24HR TREND) 95 (-1) 100
20FT WIND AM (MPH) N 6 SW 6-9
20FT WIND PM (MPH) NW 6 LGT/VAR W 6-9 LGT/VAR
PEAK WIND GUSTS (MPH) 17
PRECIP AMOUNT (IN) 0.00 0.00 0.10-0.25 0.10-0.25
11 AM MIXING HGT (FT) 3900 2000
MAX MIXING HGT (FT) 5400 2700
TRANSPORT WND (MPH) NW 11 W 13
VENT RATE (MPH-FT) 64800 37800
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
PARTLY SUNNY. HIGHS IN THE UPPER 70S. NORTH WINDS
AROUND 5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
THURSDAY
SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS, BECOMING
EAST AROUND 5 MPH IN THE AFTERNOON.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. LIGHT
WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS,
BECOMING SOUTHWEST AROUND 5 MPH IN THE AFTERNOON.
FRIDAY NIGHT
MOSTLY CLEAR. A CHANCE OF SHOWERS IN THE EVENING.
LOWS IN THE LOWER 60S. SOUTHWEST WINDS AROUND 5 MPH.
SATURDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. WEST WINDS 5 TO
10 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. NORTHWEST
WINDS AROUND 5 MPH.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTH WINDS AROUND
5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
ILZ019-172200-
LA SALLE-
INCLUDING THE CITIES OF OTTAWA, STREATOR, LA SALLE, MENDOTA,
AND MARSEILLES
453 AM CDT MON AUG 17 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLEAR MCLEAR PCLDY MCLDY
PRECIP TYPE NONE NONE TSTMS TSTMS
CHANCE PRECIP (%) 50 70
MAX TEMP (24HR TREND) 79 (-7) 79
MIN RH % (24HR TREND) 54 (-17) 70
MIN TEMP (24HR TREND) 62 (-3) 65
MAX RH % (24HR TREND) 94 (-3) 99
20FT WIND AM (MPH) N 7 SW 5-8
20FT WIND PM (MPH) NW 7 LGT/VAR W 5-8 LGT/VAR
PEAK WIND GUSTS (MPH) 17
PRECIP AMOUNT (IN) 0.00 0.00 0.05-0.10 0.25-0.50
11 AM MIXING HGT (FT) 3200 2200
MAX MIXING HGT (FT) 4900 2800
TRANSPORT WND (MPH) NW 11 SW 12
VENT RATE (MPH-FT) 58800 36400
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
PARTLY SUNNY. HIGHS IN THE UPPER 70S. NORTH WINDS
AROUND 5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT
WINDS.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHEAST WINDS
AROUND 5 MPH.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS,
BECOMING SOUTHWEST AROUND 5 MPH IN THE AFTERNOON.
FRIDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 60S. LIGHT WINDS,
BECOMING SOUTHWEST AROUND 5 MPH AFTER MIDNIGHT.
SATURDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. WEST WINDS
AROUND 5 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 60S. NORTHWEST
WINDS AROUND 5 MPH.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTH WINDS AROUND
5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. LIGHT WINDS.
ILZ020-172200-
KENDALL-
INCLUDING THE CITIES OF OSWEGO, YORKVILLE, AND PLANO
453 AM CDT MON AUG 17 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER PCLDY MCLEAR PCLDY MCLDY
PRECIP TYPE NONE NONE TSTMS TSTMS
CHANCE PRECIP (%) 10 50 70
MAX TEMP (24HR TREND) 79 (-7) 79
MIN RH % (24HR TREND) 55 (-14) 73
MIN TEMP (24HR TREND) 62 (-3) 64
MAX RH % (24HR TREND) 95 (-4) 100
20FT WIND AM (MPH) N 6-7 SW 5-9
20FT WIND PM (MPH) NW 6-7 LGT/VAR W 5-9 LGT/VAR
PEAK WIND GUSTS (MPH) 17
PRECIP AMOUNT (IN) 0.00 0.00 0.05-0.10 0.25-0.50
11 AM MIXING HGT (FT) 3000 2300
MAX MIXING HGT (FT) 4800 2900
TRANSPORT WND (MPH) NW 10 SW 13
VENT RATE (MPH-FT) 48000 40600
VENT RATE CATEGORY POOR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
PARTLY SUNNY. HIGHS IN THE UPPER 70S. NORTH WINDS
AROUND 5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. NORTH
WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHEAST WINDS
AROUND 5 MPH.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS,
BECOMING SOUTHWEST AROUND 5 MPH IN THE AFTERNOON.
FRIDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 60S. SOUTHWEST
WINDS AROUND 5 MPH.
SATURDAY
MOSTLY SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE AFTERNOON. HIGHS IN THE UPPER 70S. WEST WINDS 5 TO 10 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS AROUND 60. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTH WINDS AROUND
5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. NORTH WINDS
AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
ILZ021-172200-
GRUNDY-
INCLUDING THE CITIES OF MORRIS, COAL CITY, AND MINOOKA
453 AM CDT MON AUG 17 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER PCLDY MCLEAR PCLDY MCLDY
PRECIP TYPE NONE NONE TSTMS TSTMS
CHANCE PRECIP (%) 10 40 70
MAX TEMP (24HR TREND) 79 (-8) 80
MIN RH % (24HR TREND) 58 (-14) 72
MIN TEMP (24HR TREND) 63 (-3) 66
MAX RH % (24HR TREND) 95 (-4) 100
20FT WIND AM (MPH) N 6-7 LGT/VAR
20FT WIND PM (MPH) NW 6-7 LGT/VAR SW 4-7 LGT/VAR
PEAK WIND GUSTS (MPH)
PRECIP AMOUNT (IN) 0.00 0.00 0.01-0.05 0.25-0.50
11 AM MIXING HGT (FT) 2700 2500
MAX MIXING HGT (FT) 4400 3200
TRANSPORT WND (MPH) NW 11 SW 11
VENT RATE (MPH-FT) 52800 38400
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
PARTLY SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS,
BECOMING NORTH AROUND 5 MPH IN THE AFTERNOON.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT
WINDS.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS,
BECOMING EAST AROUND 5 MPH IN THE AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. LIGHT WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS.
FRIDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 60S. LIGHT WINDS.
SATURDAY
MOSTLY SUNNY. A CHANCE OF SHOWERS IN THE AFTERNOON.
HIGHS IN THE UPPER 70S. WEST WINDS AROUND 5 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 60S. LIGHT
WINDS.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. LIGHT WINDS.
ILZ022-172200-
WILL-
INCLUDING THE CITIES OF JOLIET, BOLINGBROOK, AND WILMINGTON
453 AM CDT MON AUG 17 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER PCLDY MCLEAR PCLDY MCLDY
PRECIP TYPE SHOWERS NONE TSTMS TSTMS
CHANCE PRECIP (%) 20 10 30 70
MAX TEMP (24HR TREND) 77 (-9) 79
MIN RH % (24HR TREND) 65 (-4) 71
MIN TEMP (24HR TREND) 62 (-5) 65
MAX RH % (24HR TREND) 96 (-2) 100
20FT WIND AM (MPH) N 7 SW 5-8
20FT WIND PM (MPH) N 7 LGT/VAR SW 5-8 LGT/VAR
PEAK WIND GUSTS (MPH) 17
PRECIP AMOUNT (IN) 0.01-0.05 0.00 0.01-0.05 0.25-0.50
11 AM MIXING HGT (FT) 3100 2400
MAX MIXING HGT (FT) 4000 3400
TRANSPORT WND (MPH) N 9 SW 12
VENT RATE (MPH-FT) 36000 44200
VENT RATE CATEGORY POOR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
PARTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST
WINDS AROUND 5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. NORTH
WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTHEAST WINDS
AROUND 5 MPH.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS,
BECOMING SOUTHWEST AROUND 5 MPH IN THE AFTERNOON.
FRIDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT
WINDS, BECOMING SOUTHWEST AROUND 5 MPH AFTER MIDNIGHT.
SATURDAY
MOSTLY SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE AFTERNOON. HIGHS IN THE UPPER 70S. WEST WINDS AROUND
5 MPH.
SATURDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
ILZ032-172200-
LIVINGSTON-
INCLUDING THE CITIES OF PONTIAC, DWIGHT, AND FAIRBURY
453 AM CDT MON AUG 17 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER MCLEAR MCLEAR PCLDY MCLDY
PRECIP TYPE NONE NONE TSTMS TSTMS
CHANCE PRECIP (%) 20 70
MAX TEMP (24HR TREND) 79 (-8) 80
MIN RH % (24HR TREND) 57 (-17) 72
MIN TEMP (24HR TREND) 62 (-5) 66
MAX RH % (24HR TREND) 95 (-5) 100
20FT WIND AM (MPH) N 6-7 LGT/VAR
20FT WIND PM (MPH) NW 6-7 LGT/VAR SW 3-6 LGT/VAR
PEAK WIND GUSTS (MPH)
PRECIP AMOUNT (IN) 0.00 0.00 0.00 0.25-0.50
11 AM MIXING HGT (FT) 3000 2700
MAX MIXING HGT (FT) 4500 3300
TRANSPORT WND (MPH) NW 12 SW 11
VENT RATE (MPH-FT) 58500 39600
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
PARTLY SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS,
BECOMING NORTH AROUND 5 MPH IN THE AFTERNOON.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT
WINDS.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS,
BECOMING NORTHEAST AROUND 5 MPH IN THE AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
FRIDAY
SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS.
FRIDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 60S. LIGHT WINDS.
SATURDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. WEST WINDS
AROUND 5 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 60S. LIGHT
WINDS.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
ILZ023-172200-
KANKAKEE-
INCLUDING THE CITIES OF KANKAKEE, BOURBONNAIS, AND BRADLEY
453 AM CDT MON AUG 17 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER PCLDY MCLEAR PCLDY MCLDY
PRECIP TYPE SHOWERS NONE TSTMS TSTMS
CHANCE PRECIP (%) 10 10 20 70
MAX TEMP (24HR TREND) 78 (-7) 79
MIN RH % (24HR TREND) 65 (-7) 70
MIN TEMP (24HR TREND) 62 (-5) 65
MAX RH % (24HR TREND) 96 (-2) 100
20FT WIND AM (MPH) N 7 LGT/VAR
20FT WIND PM (MPH) N 7 LGT/VAR SW 3-5 LGT/VAR
PEAK WIND GUSTS (MPH)
PRECIP AMOUNT (IN) 0.00 0.00 0.00 0.25-0.50
11 AM MIXING HGT (FT) 3000 2700
MAX MIXING HGT (FT) 3800 3500
TRANSPORT WND (MPH) N 11 SW 11
VENT RATE (MPH-FT) 45600 42000
VENT RATE CATEGORY POOR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
PARTLY SUNNY. A CHANCE OF SHOWERS IN THE MORNING.
HIGHS IN THE UPPER 70S. LIGHT WINDS, BECOMING NORTH AROUND 5 MPH
IN THE AFTERNOON.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. LIGHT WINDS.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS,
BECOMING NORTHEAST AROUND 5 MPH IN THE AFTERNOON.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. LIGHT
WINDS.
FRIDAY
SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS.
FRIDAY NIGHT
MOSTLY CLEAR. LOWS AROUND 60. LIGHT WINDS.
SATURDAY
MOSTLY SUNNY. A CHANCE OF SHOWERS IN THE AFTERNOON.
HIGHS IN THE UPPER 70S. WEST WINDS AROUND 5 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. LIGHT
WINDS.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
ILZ039-172200-
FORD-
INCLUDING THE CITIES OF PAXTON AND GIBSON CITY
453 AM CDT MON AUG 17 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER PCLDY MCLEAR PCLDY MCLDY
PRECIP TYPE NONE NONE NONE TSTMS
CHANCE PRECIP (%) 10 70
MAX TEMP (24HR TREND) 79 (-7) 80
MIN RH % (24HR TREND) 62 (-13) 68
MIN TEMP (24HR TREND) 62 (-5) 66
MAX RH % (24HR TREND) 96 (-4) 100
20FT WIND AM (MPH) N 7-8 LGT/VAR
20FT WIND PM (MPH) NW 7-8 LGT/VAR SW 3-5 LGT/VAR
PEAK WIND GUSTS (MPH) 13
PRECIP AMOUNT (IN) 0.00 0.00 0.00 0.25-0.50
11 AM MIXING HGT (FT) 2800 2700
MAX MIXING HGT (FT) 4300 3500
TRANSPORT WND (MPH) NW 12 SW 10
VENT RATE (MPH-FT) 55900 35000
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE MORNING.
HIGHS IN THE UPPER 70S. LIGHT WINDS, BECOMING NORTHWEST AROUND
5 MPH IN THE AFTERNOON.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. NORTH
WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTHEAST WINDS
AROUND 5 MPH.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. NORTHEAST
WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
FRIDAY
SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS.
FRIDAY NIGHT
MOSTLY CLEAR. LOWS AROUND 60. LIGHT WINDS.
SATURDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. WEST WINDS
AROUND 5 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS AROUND 60. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY
SUNNY. HIGHS IN THE MID 70S. NORTHWEST WINDS AROUND
5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
ILZ033-172200-
IROQUOIS-
INCLUDING THE CITIES OF WATSEKA AND GILMAN
453 AM CDT MON AUG 17 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER PCLDY MCLEAR PCLDY MCLDY
PRECIP TYPE NONE NONE NONE TSTMS
CHANCE PRECIP (%) 10 10 70
MAX TEMP (24HR TREND) 79 (-6) 80
MIN RH % (24HR TREND) 63 (-10) 67
MIN TEMP (24HR TREND) 61 (-7) 65
MAX RH % (24HR TREND) 96 (-4) 100
20FT WIND AM (MPH) N 7-8 LGT/VAR
20FT WIND PM (MPH) N 7-8 LGT/VAR LGT/VAR LGT/VAR
PEAK WIND GUSTS (MPH)
PRECIP AMOUNT (IN) 0.00 0.00 0.00 0.25-0.50
11 AM MIXING HGT (FT) 2800 2700
MAX MIXING HGT (FT) 3900 3600
TRANSPORT WND (MPH) N 12 SW 10
VENT RATE (MPH-FT) 50700 36000
VENT RATE CATEGORY POOR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
A CHANCE OF SHOWERS IN THE MORNING. PARTLY SUNNY.
HIGHS IN THE UPPER 70S. LIGHT WINDS.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. LIGHT WINDS.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS,
BECOMING NORTHEAST AROUND 5 MPH IN THE AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
FRIDAY
SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS.
FRIDAY NIGHT
MOSTLY CLEAR. LOWS AROUND 60. LIGHT WINDS.
SATURDAY
MOSTLY SUNNY. A CHANCE OF SHOWERS IN THE AFTERNOON.
HIGHS IN THE UPPER 70S. WEST WINDS AROUND 5 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. LIGHT
WINDS.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
INZ010-172200-
NEWTON-
INCLUDING THE CITIES OF ROSELAWN, KENTLAND, AND MOROCCO
453 AM CDT MON AUG 17 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER PCLDY MCLEAR PCLDY MCLDY
PRECIP TYPE NONE NONE TSTMS TSTMS
CHANCE PRECIP (%) 10 10 70
MAX TEMP (24HR TREND) 77 (-6) 78
MIN RH % (24HR TREND) 66 (-11) 69
MIN TEMP (24HR TREND) 61 (-6) 65
MAX RH % (24HR TREND) 95 (-5) 100
20FT WIND AM (MPH) N 6-7 LGT/VAR
20FT WIND PM (MPH) N 6-7 LGT/VAR LGT/VAR LGT/VAR
PEAK WIND GUSTS (MPH)
PRECIP AMOUNT (IN) 0.00 0.00 0.00 0.25-0.50
11 AM MIXING HGT (FT) 3000 2700
MAX MIXING HGT (FT) 4000 3700
TRANSPORT WND (MPH) N 12 SW 9
VENT RATE (MPH-FT) 52000 33300
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
PARTLY SUNNY WITH A CHANCE OF SHOWERS. HIGHS IN THE
MID 70S. LIGHT WINDS, BECOMING NORTHWEST AROUND 5 MPH IN THE
AFTERNOON.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. LIGHT WINDS.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS,
BECOMING NORTHEAST AROUND 5 MPH IN THE AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. LIGHT
WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS.
FRIDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. LIGHT WINDS.
SATURDAY
MOSTLY SUNNY. A CHANCE OF SHOWERS IN THE AFTERNOON.
HIGHS IN THE UPPER 70S. WEST WINDS AROUND 5 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. LIGHT
WINDS.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
INZ011-172200-
JASPER-
INCLUDING THE CITIES OF RENSSELAER AND DEMOTTE
453 AM CDT MON AUG 17 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER PCLDY MCLEAR PCLDY MCLDY
PRECIP TYPE NONE NONE TSTMS TSTMS
CHANCE PRECIP (%) 10 10 70
MAX TEMP (24HR TREND) 77 (-6) 78
MIN RH % (24HR TREND) 65 (-12) 70
MIN TEMP (24HR TREND) 61 (-7) 65
MAX RH % (24HR TREND) 95 (-5) 100
20FT WIND AM (MPH) N 6-7 LGT/VAR
20FT WIND PM (MPH) N 6-7 LGT/VAR SW 3-5 LGT/VAR
PEAK WIND GUSTS (MPH)
PRECIP AMOUNT (IN) 0.00 0.00 0.00 0.25-0.50
11 AM MIXING HGT (FT) 2900 2700
MAX MIXING HGT (FT) 3900 3800
TRANSPORT WND (MPH) N 13 SW 9
VENT RATE (MPH-FT) 54600 34200
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
PARTLY SUNNY WITH A CHANCE OF SHOWERS. HIGHS IN THE
MID 70S. LIGHT WINDS, BECOMING NORTHWEST AROUND 5 MPH IN THE
AFTERNOON.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS,
BECOMING NORTHEAST AROUND 5 MPH IN THE AFTERNOON.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE MID 50S. LIGHT WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS.
FRIDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. LIGHT WINDS.
SATURDAY
MOSTLY SUNNY. A CHANCE OF SHOWERS IN THE AFTERNOON.
HIGHS IN THE MID 70S. WEST WINDS AROUND 5 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. LIGHT
WINDS.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. LIGHT WINDS.
INZ019-172200-
BENTON-
INCLUDING THE CITIES OF FOWLER AND OXFORD
553 AM EDT MON AUG 17 2026
TODAY TONIGHT TUE TUE NIGHT
CLOUD COVER PCLDY MCLEAR PCLDY MCLDY
PRECIP TYPE NONE NONE NONE TSTMS
CHANCE PRECIP (%) 70
MAX TEMP (24HR TREND) 78 (-6) 79
MIN RH % (24HR TREND) 65 (-8) 68
MIN TEMP (24HR TREND) 61 (-7) 66
MAX RH % (24HR TREND) 95 (-5) 100
20FT WIND AM (MPH) N 7-8 LGT/VAR
20FT WIND PM (MPH) N 7-8 LGT/VAR LGT/VAR LGT/VAR
PEAK WIND GUSTS (MPH) 13
PRECIP AMOUNT (IN) 0.00 0.00 0.00 0.10-0.25
11 AM MIXING HGT (FT) 2600 2800
MAX MIXING HGT (FT) 3900 3700
TRANSPORT WND (MPH) N 13 SW 9
VENT RATE (MPH-FT) 54600 33300
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
WEDNESDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. HIGHS IN THE
UPPER 70S. LIGHT WINDS.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT
WINDS.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS,
BECOMING NORTHEAST AROUND 5 MPH IN THE AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
FRIDAY
SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS.
FRIDAY NIGHT
MOSTLY CLEAR. LOWS AROUND 60. LIGHT WINDS.
SATURDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. WEST WINDS
AROUND 5 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS AROUND 60. LIGHT WINDS.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
PETR
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