669
FNUS53 KLOT 180931
FWFLOT
FIRE WEATHER PLANNING FORECAST FOR NORTHERN IL AND NORTHWEST IN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
431 AM CDT TUE AUG 18 2026
DISCUSSION
A DECAYING THUNDERSTORM COMPLEX OVER THE MISSOURI RIVER EARLY THIS
MORNING IS EXPECTED TO GRADUALLY DECAY WHILE CROSSING IOWA AND
NORTHERN ILLINOIS. PLENTY OF MID-LEVEL CLOUDS AND POSSIBLY A FEW
SHOWERS ARE EXPECTED LATE MORNING THROUGH MID-AFTERNOON.
A COLD FRONT WILL BRING ISOLATED THUNDERSTORMS TO AREAS NORTH OF
I-80, AND ESPECIALLY NORTH OF I-90, SOMETIME LATE AFTERNOON
THROUGH MID EVENING. TORRENTIAL RAINFALL AND A FEW INSTANCES OF
DAMAGING WIND ARE POSSIBLE WITH THESE STORMS. THE COLD FRONT WILL
STALL OVER CENTRAL ILLINOIS ON WEDNESDAY AND MAY LEAD TO SCATTERED
SHOWERS AND A FEW THUNDERSTORMS SOUTH OF U.S. 24 DURING THE
AFTERNOON.
SHOWER AND THUNDERSTORM CHANCES WILL RETURN FRIDAY NIGHT AND
SATURDAY WITH A PAIR OF MID-LEVEL TROUGHS CROSSING THE WESTERN
GREAT LAKES. TEMPERATURES ARE EXPECTED TO REMAIN NEAR OR SLIGHTLY
BELOW NORMAL FOR MID TO LATE AUGUST WITH DAYTIME HIGHS IN THE MID
70S TO AROUND 80 THROUGH THE WEEKEND.
ILZ014-182145-
COOK-
INCLUDING THE CITIES OF CHICAGO, SCHAUMBURG, EVANSTON, OAK LAWN,
LEMONT, ORLAND PARK, AND PARK FOREST
431 AM CDT TUE AUG 18 2026
TODAY TONIGHT WED WED NIGHT
CLOUD COVER PCLDY MCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS TSTMS NONE NONE
CHANCE PRECIP (%) 50 50 10
MAX TEMP (24HR TREND) 80 (+1) 77
MIN RH % (24HR TREND) 59 (+4) 67
MIN TEMP (24HR TREND) 65 (+2) 60
MAX RH % (24HR TREND) 98 (+8) 90
20FT WIND AM (MPH) SW 8-10 LGT/VAR
20FT WIND PM (MPH) SW 8-10 SW 5-6 NE 3-5 LGT/VAR
PEAK WIND GUSTS (MPH) 21
PRECIP AMOUNT (IN) 0.05-0.10 0.25-0.50 0.00 0.00
11 AM MIXING HGT (FT) 2800 2900
MAX MIXING HGT (FT) 4000 4400
TRANSPORT WND (MPH) W 17 NE 8
VENT RATE (MPH-FT) 68000 35200
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
THURSDAY
SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS, BECOMING
NORTHEAST AROUND 5 MPH IN THE AFTERNOON.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 60S. EAST WINDS
AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHWEST WINDS
5 TO 10 MPH.
FRIDAY NIGHT
PARTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS IN
THE MID 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 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. NORTH WINDS
AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
MONDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. WEST WINDS AROUND
5 MPH, BECOMING EAST IN THE AFTERNOON.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. SOUTHEAST
WINDS AROUND 5 MPH.
ILZ006-182145-
LAKE IL-
INCLUDING THE CITIES OF WAUKEGAN, BUFFALO GROVE, MUNDELEIN,
AND GURNEE
431 AM CDT TUE AUG 18 2026
TODAY TONIGHT WED WED NIGHT
CLOUD COVER MCLDY PCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS TSTMS NONE NONE
CHANCE PRECIP (%) 50 60 10
MAX TEMP (24HR TREND) 80 (+1) 76
MIN RH % (24HR TREND) 63 (+8) 66
MIN TEMP (24HR TREND) 62 (+1) 57
MAX RH % (24HR TREND) 98 (+7) 96
20FT WIND AM (MPH) SW 9-11 LGT/VAR
20FT WIND PM (MPH) W 9-11 W 5-6 NE 3-5 LGT/VAR
PEAK WIND GUSTS (MPH) 20
PRECIP AMOUNT (IN) 0.25-0.50 0.10-0.25 0.00 0.00
11 AM MIXING HGT (FT) 2600 2800
MAX MIXING HGT (FT) 3600 4300
TRANSPORT WND (MPH) W 19 NE 8
VENT RATE (MPH-FT) 72000 34400
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
THURSDAY
SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS, BECOMING
SOUTHEAST AROUND 5 MPH IN THE AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. EAST
WINDS AROUND 5 MPH, BECOMING SOUTHWEST AFTER MIDNIGHT.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHWEST WINDS
5 TO 10 MPH.
FRIDAY NIGHT
PARTLY CLOUDY WITH A CHANCE OF SHOWERS. 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. NORTHWEST WINDS AROUND
5 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. 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.
MONDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. WEST WINDS AROUND
5 MPH, BECOMING SOUTHEAST IN THE AFTERNOON.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT
WINDS.
INZ001-182145-
LAKE IN-
INCLUDING THE CITIES OF GARY, HAMMOND, AND MERRILLVILLE
431 AM CDT TUE AUG 18 2026
TODAY TONIGHT WED WED NIGHT
CLOUD COVER PCLDY MCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS TSTMS NONE NONE
CHANCE PRECIP (%) 30 50 10
MAX TEMP (24HR TREND) 80 (+3) 75
MIN RH % (24HR TREND) 62 (+4) 79
MIN TEMP (24HR TREND) 66 (+6) 58
MAX RH % (24HR TREND) 97 (-1) 96
20FT WIND AM (MPH) SW 6-9 LGT/VAR
20FT WIND PM (MPH) SW 6-9 SW 5-6 N 3-5 LGT/VAR
PEAK WIND GUSTS (MPH) 18
PRECIP AMOUNT (IN) 0.00 0.10-0.25 0.00 0.00
11 AM MIXING HGT (FT) 2800 2000
MAX MIXING HGT (FT) 4000 3900
TRANSPORT WND (MPH) SW 14 N 8
VENT RATE (MPH-FT) 60000 31200
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
THURSDAY
SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS, BECOMING
NORTHEAST AROUND 5 MPH IN THE AFTERNOON.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS AROUND 60. 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. 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.
MONDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. WEST WINDS AROUND
5 MPH, BECOMING NORTH IN THE AFTERNOON.
MONDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. LIGHT WINDS.
INZ002-182145-
PORTER-
INCLUDING THE CITIES OF PORTAGE, VALPARAISO, AND CHESTERTON
431 AM CDT TUE AUG 18 2026
TODAY TONIGHT WED WED NIGHT
CLOUD COVER PCLDY MCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS TSTMS NONE NONE
CHANCE PRECIP (%) 30 50 10
MAX TEMP (24HR TREND) 80 (+3) 75
MIN RH % (24HR TREND) 62 (+1) 78
MIN TEMP (24HR TREND) 66 (+6) 57
MAX RH % (24HR TREND) 97 (0) 96
20FT WIND AM (MPH) SW 6-8 LGT/VAR
20FT WIND PM (MPH) SW 6-8 SW 5-6 N 4-6 LGT/VAR
PEAK WIND GUSTS (MPH) 15
PRECIP AMOUNT (IN) 0.00 0.10-0.25 0.00 0.00
11 AM MIXING HGT (FT) 3000 2000
MAX MIXING HGT (FT) 4100 3500
TRANSPORT WND (MPH) SW 14 N 8
VENT RATE (MPH-FT) 61500 28000
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
THURSDAY
SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS, BECOMING
NORTH AROUND 5 MPH IN THE AFTERNOON.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. LIGHT
WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. SOUTH 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. 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 MID 70S. NORTH WINDS AROUND
5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
MONDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. WEST WINDS AROUND
5 MPH.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
ILZ013-182145-
DUPAGE-
INCLUDING THE CITIES OF NAPERVILLE, WHEATON, DOWNERS GROVE,
LOMBARD, AND CAROL STREAM
431 AM CDT TUE AUG 18 2026
TODAY TONIGHT WED WED NIGHT
CLOUD COVER PCLDY MCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS NONE NONE
CHANCE PRECIP (%) 50 60 10
MAX TEMP (24HR TREND) 80 (-1) 77
MIN RH % (24HR TREND) 62 (+13) 67
MIN TEMP (24HR TREND) 64 (+2) 58
MAX RH % (24HR TREND) 97 (+6) 93
20FT WIND AM (MPH) SW 8-10 LGT/VAR
20FT WIND PM (MPH) SW 8-10 SW 5-6 LGT/VAR LGT/VAR
PEAK WIND GUSTS (MPH) 20
PRECIP AMOUNT (IN) 0.10-0.25 0.25-0.50 0.00 0.00
11 AM MIXING HGT (FT) 2600 2900
MAX MIXING HGT (FT) 3900 4500
TRANSPORT WND (MPH) W 18 N 6
VENT RATE (MPH-FT) 70200 31500
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
THURSDAY
SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS, BECOMING
NORTHEAST AROUND 5 MPH IN THE AFTERNOON.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 60S. NORTH
WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHWEST WINDS
5 TO 10 MPH.
FRIDAY NIGHT
PARTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS IN
THE MID 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 IN THE LOWER 60S. NORTHWEST
WINDS AROUND 5 MPH.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. NORTH WINDS AROUND
5 MPH IN THE EVENING, BECOMING LIGHT.
MONDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHWEST WINDS
AROUND 5 MPH.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. SOUTH WINDS
AROUND 5 MPH.
ILZ012-182145-
KANE-
INCLUDING THE CITIES OF AURORA AND ELGIN
431 AM CDT TUE AUG 18 2026
TODAY TONIGHT WED WED NIGHT
CLOUD COVER MCLDY MCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS NONE NONE
CHANCE PRECIP (%) 50 50 10
MAX TEMP (24HR TREND) 79 (-1) 77
MIN RH % (24HR TREND) 69 (+21) 68
MIN TEMP (24HR TREND) 63 (+2) 57
MAX RH % (24HR TREND) 97 (+3) 96
20FT WIND AM (MPH) SW 8-10 LGT/VAR
20FT WIND PM (MPH) SW 8-10 W 5-6 LGT/VAR LGT/VAR
PEAK WIND GUSTS (MPH) 20
PRECIP AMOUNT (IN) 0.10-0.25 0.25-0.50 0.00 0.00
11 AM MIXING HGT (FT) 2400 2300
MAX MIXING HGT (FT) 3500 4000
TRANSPORT WND (MPH) W 18 N 8
VENT RATE (MPH-FT) 63000 32000
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
THURSDAY
SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS, BECOMING
NORTHEAST AROUND 5 MPH IN THE AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. LIGHT WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHWEST WINDS
5 TO 10 MPH.
FRIDAY NIGHT
PARTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS IN
THE LOWER 60S. SOUTHWEST WINDS AROUND 5 MPH.
SATURDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST 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. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. NORTH WINDS
AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
MONDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. SOUTH WINDS AROUND
5 MPH.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. SOUTH WINDS
AROUND 5 MPH.
ILZ005-182145-
MCHENRY-
INCLUDING THE CITIES OF CRYSTAL LAKE, ALGONQUIN, MCHENRY,
AND WOODSTOCK
431 AM CDT TUE AUG 18 2026
TODAY TONIGHT WED WED NIGHT
CLOUD COVER MCLDY PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS NONE NONE
CHANCE PRECIP (%) 50 60 10
MAX TEMP (24HR TREND) 79 (-1) 77
MIN RH % (24HR TREND) 68 (+22) 64
MIN TEMP (24HR TREND) 61 (+1) 56
MAX RH % (24HR TREND) 97 (+4) 96
20FT WIND AM (MPH) SW 8-11 LGT/VAR
20FT WIND PM (MPH) W 8-11 LGT/VAR LGT/VAR LGT/VAR
PEAK WIND GUSTS (MPH) 20
PRECIP AMOUNT (IN) 0.25-0.50 0.10-0.25 0.00 0.00
11 AM MIXING HGT (FT) 2200 2500
MAX MIXING HGT (FT) 3300 4700
TRANSPORT WND (MPH) W 19 N 8
VENT RATE (MPH-FT) 66000 37600
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
THURSDAY
SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS, BECOMING
SOUTHEAST AROUND 5 MPH IN THE AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. LIGHT WINDS.
FRIDAY
MOSTLY SUNNY. A CHANCE OF SHOWERS IN THE AFTERNOON.
HIGHS IN THE UPPER 70S. SOUTHWEST WINDS 5 TO 10 MPH.
FRIDAY NIGHT
PARTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS IN
THE LOWER 60S. SOUTHWEST WINDS AROUND 5 MPH.
SATURDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST 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.
MONDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS,
BECOMING SOUTHWEST AROUND 5 MPH IN THE AFTERNOON.
MONDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. LIGHT WINDS.
ILZ004-182145-
BOONE-
INCLUDING THE CITY OF BELVIDERE
431 AM CDT TUE AUG 18 2026
TODAY TONIGHT WED WED NIGHT
CLOUD COVER MCLDY PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS NONE NONE
CHANCE PRECIP (%) 50 50 10
MAX TEMP (24HR TREND) 79 (0) 77
MIN RH % (24HR TREND) 68 (+18) 62
MIN TEMP (24HR TREND) 61 (+1) 55
MAX RH % (24HR TREND) 97 (+2) 96
20FT WIND AM (MPH) SW 8-11 LGT/VAR
20FT WIND PM (MPH) W 8-11 LGT/VAR LGT/VAR LGT/VAR
PEAK WIND GUSTS (MPH) 20
PRECIP AMOUNT (IN) 0.25-0.50 0.10-0.25 0.00 0.00
11 AM MIXING HGT (FT) 2200 2100
MAX MIXING HGT (FT) 3300 5000
TRANSPORT WND (MPH) W 18 N 8
VENT RATE (MPH-FT) 59400 40000
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
THURSDAY
SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
FRIDAY
MOSTLY SUNNY. A CHANCE OF SHOWERS IN THE AFTERNOON.
HIGHS IN THE UPPER 70S. SOUTHWEST WINDS 5 TO 10 MPH.
FRIDAY NIGHT
PARTLY CLOUDY. A CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING. LOWS IN THE LOWER 60S. SOUTHWEST
WINDS AROUND 5 MPH.
SATURDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST 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. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. LIGHT WINDS.
MONDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. SOUTH WINDS AROUND
5 MPH.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
ILZ011-182145-
DE KALB-
INCLUDING THE CITIES OF DEKALB AND SYCAMORE
431 AM CDT TUE AUG 18 2026
TODAY TONIGHT WED WED NIGHT
CLOUD COVER MCLDY MCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS NONE NONE
CHANCE PRECIP (%) 50 50 10
MAX TEMP (24HR TREND) 79 (0) 77
MIN RH % (24HR TREND) 69 (+17) 65
MIN TEMP (24HR TREND) 63 (+3) 56
MAX RH % (24HR TREND) 98 (+4) 96
20FT WIND AM (MPH) SW 8-10 LGT/VAR
20FT WIND PM (MPH) SW 8-10 LGT/VAR LGT/VAR LGT/VAR
PEAK WIND GUSTS (MPH) 20
PRECIP AMOUNT (IN) 0.10-0.25 0.10-0.25 0.00 0.00
11 AM MIXING HGT (FT) 2400 2000
MAX MIXING HGT (FT) 3300 4100
TRANSPORT WND (MPH) W 19 N 8
VENT RATE (MPH-FT) 66000 32800
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
THURSDAY
SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS, BECOMING
NORTHEAST AROUND 5 MPH IN THE AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. LIGHT WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHWEST WINDS
5 TO 10 MPH.
FRIDAY NIGHT
A CHANCE OF THUNDERSTORMS IN THE EVENING. PARTLY
CLOUDY WITH A CHANCE OF SHOWERS. LOWS IN THE LOWER 60S. SOUTHWEST
WINDS AROUND 5 MPH.
SATURDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST WINDS
AROUND 10 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. 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. NORTHWEST
WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
MONDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. SOUTH WINDS AROUND
5 MPH.
MONDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. SOUTH WINDS AROUND
5 MPH.
ILZ003-182145-
WINNEBAGO-
INCLUDING THE CITY OF ROCKFORD
431 AM CDT TUE AUG 18 2026
TODAY TONIGHT WED WED NIGHT
CLOUD COVER MCLDY PCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS TSTMS NONE NONE
CHANCE PRECIP (%) 50 50
MAX TEMP (24HR TREND) 79 (-2) 78
MIN RH % (24HR TREND) 66 (+22) 59
MIN TEMP (24HR TREND) 61 (+1) 54
MAX RH % (24HR TREND) 97 (+3) 98
20FT WIND AM (MPH) SW 8-11 LGT/VAR
20FT WIND PM (MPH) SW 8-11 LGT/VAR LGT/VAR LGT/VAR
PEAK WIND GUSTS (MPH) 19
PRECIP AMOUNT (IN) 0.25-0.50 0.05-0.10 0.00 0.00
11 AM MIXING HGT (FT) 2300 2000
MAX MIXING HGT (FT) 3300 4900
TRANSPORT WND (MPH) W 19 NW 8
VENT RATE (MPH-FT) 66000 39200
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
THURSDAY
SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS, BECOMING
SOUTHEAST AROUND 5 MPH IN THE AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS, BECOMING SOUTH AROUND 5 MPH AFTER MIDNIGHT.
FRIDAY
MOSTLY SUNNY. A CHANCE OF SHOWERS IN THE AFTERNOON.
HIGHS IN THE UPPER 70S. SOUTHWEST WINDS 5 TO 10 MPH.
FRIDAY NIGHT
PARTLY CLOUDY. A CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING. LOWS IN THE LOWER 60S. SOUTHWEST
WINDS AROUND 5 MPH.
SATURDAY
PARTLY SUNNY IN THE MORNING THEN CLEARING. HIGHS IN
THE UPPER 70S. NORTHWEST WINDS 5 TO 10 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS IN THE MID 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.
MONDAY
PARTLY SUNNY. HIGHS IN THE MID 70S. SOUTH WINDS AROUND
5 MPH.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
ILZ008-182145-
OGLE-
INCLUDING THE CITIES OF ROCHELLE, OREGON, AND BYRON
431 AM CDT TUE AUG 18 2026
TODAY TONIGHT WED WED NIGHT
CLOUD COVER MCLDY PCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS TSTMS NONE NONE
CHANCE PRECIP (%) 50 50
MAX TEMP (24HR TREND) 79 (-1) 78
MIN RH % (24HR TREND) 67 (+20) 63
MIN TEMP (24HR TREND) 62 (+2) 55
MAX RH % (24HR TREND) 97 (+1) 98
20FT WIND AM (MPH) SW 8-10 LGT/VAR
20FT WIND PM (MPH) SW 8-10 LGT/VAR LGT/VAR LGT/VAR
PEAK WIND GUSTS (MPH) 19
PRECIP AMOUNT (IN) 0.10-0.25 0.10-0.25 0.00 0.00
11 AM MIXING HGT (FT) 2200 1800
MAX MIXING HGT (FT) 3100 4600
TRANSPORT WND (MPH) SW 18 NW 8
VENT RATE (MPH-FT) 55800 36800
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
THURSDAY
SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. LIGHT WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHWEST WINDS
5 TO 10 MPH.
FRIDAY NIGHT
PARTLY CLOUDY. A CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING. LOWS IN THE LOWER 60S. SOUTHWEST
WINDS AROUND 5 MPH.
SATURDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST 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.
MONDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. SOUTH WINDS AROUND
5 MPH.
MONDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. LIGHT WINDS.
ILZ010-182145-
LEE-
INCLUDING THE CITY OF DIXON
431 AM CDT TUE AUG 18 2026
TODAY TONIGHT WED WED NIGHT
CLOUD COVER MCLDY PCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS TSTMS NONE NONE
CHANCE PRECIP (%) 50 50 10
MAX TEMP (24HR TREND) 79 (-1) 78
MIN RH % (24HR TREND) 70 (+22) 65
MIN TEMP (24HR TREND) 63 (+3) 57
MAX RH % (24HR TREND) 98 (+2) 99
20FT WIND AM (MPH) SW 8-10 LGT/VAR
20FT WIND PM (MPH) SW 8-10 LGT/VAR LGT/VAR LGT/VAR
PEAK WIND GUSTS (MPH) 19
PRECIP AMOUNT (IN) 0.10-0.25 0.10-0.25 0.00 0.00
11 AM MIXING HGT (FT) 2300 1800
MAX MIXING HGT (FT) 2900 4100
TRANSPORT WND (MPH) W 17 N 8
VENT RATE (MPH-FT) 49300 32800
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
THURSDAY
SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS AROUND 60. LIGHT WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHWEST WINDS
5 TO 10 MPH.
FRIDAY NIGHT
A CHANCE OF THUNDERSTORMS IN THE EVENING. PARTLY
CLOUDY WITH A CHANCE OF SHOWERS. LOWS IN THE LOWER 60S. SOUTHWEST
WINDS AROUND 5 MPH.
SATURDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST 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. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS, BECOMING SOUTHEAST AROUND 5 MPH AFTER MIDNIGHT.
MONDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. SOUTH WINDS AROUND
5 MPH.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. SOUTHEAST
WINDS AROUND 5 MPH.
ILZ019-182145-
LA SALLE-
INCLUDING THE CITIES OF OTTAWA, STREATOR, LA SALLE, MENDOTA,
AND MARSEILLES
431 AM CDT TUE AUG 18 2026
TODAY TONIGHT WED WED NIGHT
CLOUD COVER MCLDY PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS NONE NONE
CHANCE PRECIP (%) 40 50 10
MAX TEMP (24HR TREND) 79 (-2) 78
MIN RH % (24HR TREND) 68 (+16) 67
MIN TEMP (24HR TREND) 65 (+4) 58
MAX RH % (24HR TREND) 97 (+1) 95
20FT WIND AM (MPH) SW 7-9 LGT/VAR
20FT WIND PM (MPH) SW 7-9 LGT/VAR LGT/VAR LGT/VAR
PEAK WIND GUSTS (MPH) 18
PRECIP AMOUNT (IN) 0.01-0.05 0.10-0.25 0.00 0.00
11 AM MIXING HGT (FT) 2500 1900
MAX MIXING HGT (FT) 3400 4000
TRANSPORT WND (MPH) W 16 N 6
VENT RATE (MPH-FT) 54400 28000
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
THURSDAY
SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS AROUND 60. 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 IN
THE MID 60S. SOUTHWEST WINDS AROUND 5 MPH.
SATURDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST WINDS
5 TO 10 MPH.
SATURDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 60S. NORTHWEST
WINDS AROUND 5 MPH.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. LIGHT WINDS.
MONDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTH WINDS
AROUND 5 MPH.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. SOUTHEAST
WINDS AROUND 5 MPH.
ILZ020-182145-
KENDALL-
INCLUDING THE CITIES OF OSWEGO, YORKVILLE, AND PLANO
431 AM CDT TUE AUG 18 2026
TODAY TONIGHT WED WED NIGHT
CLOUD COVER MCLDY MCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS NONE NONE
CHANCE PRECIP (%) 40 50 10
MAX TEMP (24HR TREND) 80 (-1) 78
MIN RH % (24HR TREND) 67 (+21) 68
MIN TEMP (24HR TREND) 64 (+3) 58
MAX RH % (24HR TREND) 98 (+1) 98
20FT WIND AM (MPH) SW 7-10 LGT/VAR
20FT WIND PM (MPH) SW 7-10 LGT/VAR LGT/VAR LGT/VAR
PEAK WIND GUSTS (MPH) 19
PRECIP AMOUNT (IN) 0.05-0.10 0.10-0.25 0.00 0.00
11 AM MIXING HGT (FT) 2500 2100
MAX MIXING HGT (FT) 3500 3900
TRANSPORT WND (MPH) W 17 N 6
VENT RATE (MPH-FT) 59500 27300
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
THURSDAY
SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS, BECOMING
NORTHEAST AROUND 5 MPH IN THE AFTERNOON.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS AROUND 60. LIGHT WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHWEST WINDS
5 TO 10 MPH.
FRIDAY NIGHT
PARTLY CLOUDY WITH A CHANCE OF SHOWERS. 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. NORTHWEST 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. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. NORTHWEST
WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
MONDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTH WINDS
AROUND 5 MPH.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. SOUTH WINDS
AROUND 5 MPH.
ILZ021-182145-
GRUNDY-
INCLUDING THE CITIES OF MORRIS, COAL CITY, AND MINOOKA
431 AM CDT TUE AUG 18 2026
TODAY TONIGHT WED WED NIGHT
CLOUD COVER PCLDY MCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS NONE NONE
CHANCE PRECIP (%) 30 50 10
MAX TEMP (24HR TREND) 80 (-1) 78
MIN RH % (24HR TREND) 68 (+15) 71
MIN TEMP (24HR TREND) 66 (+5) 59
MAX RH % (24HR TREND) 98 (+1) 98
20FT WIND AM (MPH) SW 6-9 LGT/VAR
20FT WIND PM (MPH) SW 6-9 LGT/VAR LGT/VAR LGT/VAR
PEAK WIND GUSTS (MPH) 17
PRECIP AMOUNT (IN) 0.01-0.05 0.10-0.25 0.00 0.00
11 AM MIXING HGT (FT) 2600 1900
MAX MIXING HGT (FT) 3600 3900
TRANSPORT WND (MPH) W 16 N 6
VENT RATE (MPH-FT) 57600 27300
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
THURSDAY
SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS AROUND 60. 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 IN
THE MID 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
MOSTLY CLEAR. LOWS IN THE LOWER 60S. LIGHT
WINDS.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. LIGHT WINDS.
MONDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTH WINDS
AROUND 5 MPH.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT
WINDS.
ILZ022-182145-
WILL-
INCLUDING THE CITIES OF JOLIET, BOLINGBROOK, AND WILMINGTON
431 AM CDT TUE AUG 18 2026
TODAY TONIGHT WED WED NIGHT
CLOUD COVER PCLDY MCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS TSTMS NONE NONE
CHANCE PRECIP (%) 40 50 10
MAX TEMP (24HR TREND) 79 (-1) 77
MIN RH % (24HR TREND) 66 (+14) 73
MIN TEMP (24HR TREND) 65 (+4) 59
MAX RH % (24HR TREND) 98 (0) 98
20FT WIND AM (MPH) SW 7-9 LGT/VAR
20FT WIND PM (MPH) SW 7-9 LGT/VAR LGT/VAR LGT/VAR
PEAK WIND GUSTS (MPH) 19
PRECIP AMOUNT (IN) 0.01-0.05 0.10-0.25 0.00 0.00
11 AM MIXING HGT (FT) 2700 2100
MAX MIXING HGT (FT) 3900 4000
TRANSPORT WND (MPH) W 16 N 6
VENT RATE (MPH-FT) 62400 28000
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
THURSDAY
SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS, BECOMING
NORTHEAST AROUND 5 MPH IN THE AFTERNOON.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS AROUND 60. 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 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 IN THE EVENING, BECOMING LIGHT.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
MONDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. SOUTHWEST WINDS
AROUND 5 MPH.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. SOUTHEAST
WINDS AROUND 5 MPH.
ILZ032-182145-
LIVINGSTON-
INCLUDING THE CITIES OF PONTIAC, DWIGHT, AND FAIRBURY
431 AM CDT TUE AUG 18 2026
TODAY TONIGHT WED WED NIGHT
CLOUD COVER PCLDY MCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS NONE
CHANCE PRECIP (%) 20 50 20 10
MAX TEMP (24HR TREND) 80 (0) 77
MIN RH % (24HR TREND) 66 (+6) 77
MIN TEMP (24HR TREND) 66 (+5) 59
MAX RH % (24HR TREND) 98 (0) 100
20FT WIND AM (MPH) SW 6-8 LGT/VAR
20FT WIND PM (MPH) SW 6-8 LGT/VAR LGT/VAR LGT/VAR
PEAK WIND GUSTS (MPH)
PRECIP AMOUNT (IN) 0.00 0.10-0.25 0.01-0.05 0.00
11 AM MIXING HGT (FT) 2600 1900
MAX MIXING HGT (FT) 3600 3800
TRANSPORT WND (MPH) W 13 N 8
VENT RATE (MPH-FT) 50400 30400
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
THURSDAY
SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS AROUND 60. 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 MID 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 AROUND 60. LIGHT WINDS.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. LIGHT WINDS.
MONDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTH WINDS
AROUND 5 MPH.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. SOUTHEAST
WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
ILZ023-182145-
KANKAKEE-
INCLUDING THE CITIES OF KANKAKEE, BOURBONNAIS, AND BRADLEY
431 AM CDT TUE AUG 18 2026
TODAY TONIGHT WED WED NIGHT
CLOUD COVER PCLDY MCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS NONE NONE
CHANCE PRECIP (%) 30 50 10
MAX TEMP (24HR TREND) 80 (+1) 76
MIN RH % (24HR TREND) 65 (+4) 78
MIN TEMP (24HR TREND) 66 (+5) 58
MAX RH % (24HR TREND) 97 (-1) 98
20FT WIND AM (MPH) SW 5-8 LGT/VAR
20FT WIND PM (MPH) SW 5-8 LGT/VAR LGT/VAR LGT/VAR
PEAK WIND GUSTS (MPH) 14
PRECIP AMOUNT (IN) 0.00 0.10-0.25 0.00 0.00
11 AM MIXING HGT (FT) 2700 1900
MAX MIXING HGT (FT) 3900 3800
TRANSPORT WND (MPH) W 14 N 6
VENT RATE (MPH-FT) 58500 26600
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
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. 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. 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
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.
MONDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. SOUTH WINDS AROUND
5 MPH.
MONDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. LIGHT WINDS.
ILZ039-182145-
FORD-
INCLUDING THE CITIES OF PAXTON AND GIBSON CITY
431 AM CDT TUE AUG 18 2026
TODAY TONIGHT WED WED NIGHT
CLOUD COVER PCLDY PCLDY MCLDY PCLDY
PRECIP TYPE NONE TSTMS TSTMS NONE
CHANCE PRECIP (%) 10 40 30 10
MAX TEMP (24HR TREND) 80 (+1) 76
MIN RH % (24HR TREND) 64 (0) 81
MIN TEMP (24HR TREND) 66 (+6) 59
MAX RH % (24HR TREND) 96 (-2) 98
20FT WIND AM (MPH) SW 5-7 LGT/VAR
20FT WIND PM (MPH) SW 5-7 LGT/VAR LGT/VAR LGT/VAR
PEAK WIND GUSTS (MPH)
PRECIP AMOUNT (IN) 0.00 0.05-0.10 0.01-0.05 0.00
11 AM MIXING HGT (FT) 2800 1600
MAX MIXING HGT (FT) 3800 3300
TRANSPORT WND (MPH) SW 12 N 8
VENT RATE (MPH-FT) 49400 26400
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
THURSDAY
SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. LIGHT
WINDS.
FRIDAY
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. 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 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. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
MONDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHEAST WINDS
AROUND 5 MPH.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. SOUTHEAST
WINDS AROUND 5 MPH.
ILZ033-182145-
IROQUOIS-
INCLUDING THE CITIES OF WATSEKA AND GILMAN
431 AM CDT TUE AUG 18 2026
TODAY TONIGHT WED WED NIGHT
CLOUD COVER PCLDY MCLDY MCLDY PCLDY
PRECIP TYPE NONE TSTMS SHOWERS NONE
CHANCE PRECIP (%) 20 40 30 10
MAX TEMP (24HR TREND) 80 (+1) 76
MIN RH % (24HR TREND) 63 (-3) 80
MIN TEMP (24HR TREND) 66 (+6) 58
MAX RH % (24HR TREND) 96 (-1) 98
20FT WIND AM (MPH) LGT/VAR LGT/VAR
20FT WIND PM (MPH) SW 4-7 LGT/VAR LGT/VAR LGT/VAR
PEAK WIND GUSTS (MPH)
PRECIP AMOUNT (IN) 0.00 0.10-0.25 0.01-0.05 0.00
11 AM MIXING HGT (FT) 2800 1600
MAX MIXING HGT (FT) 4000 3300
TRANSPORT WND (MPH) SW 12 N 6
VENT RATE (MPH-FT) 52000 23100
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
THURSDAY
SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. LIGHT
WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS.
FRIDAY NIGHT
PARTLY CLOUDY. A CHANCE OF SHOWERS AFTER
MIDNIGHT. 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 IN THE UPPER 50S. LIGHT
WINDS.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS,
BECOMING NORTHWEST AROUND 5 MPH IN THE AFTERNOON.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
MONDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS,
BECOMING SOUTH AROUND 5 MPH IN THE AFTERNOON.
MONDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. LIGHT WINDS.
INZ010-182145-
NEWTON-
INCLUDING THE CITIES OF ROSELAWN, KENTLAND, AND MOROCCO
431 AM CDT TUE AUG 18 2026
TODAY TONIGHT WED WED NIGHT
CLOUD COVER PCLDY MCLDY PCLDY PCLDY
PRECIP TYPE NONE TSTMS SHOWERS NONE
CHANCE PRECIP (%) 20 50 20 10
MAX TEMP (24HR TREND) 80 (+2) 75
MIN RH % (24HR TREND) 63 (+2) 82
MIN TEMP (24HR TREND) 66 (+6) 58
MAX RH % (24HR TREND) 97 (0) 97
20FT WIND AM (MPH) SW 5-7 LGT/VAR
20FT WIND PM (MPH) SW 5-7 LGT/VAR LGT/VAR LGT/VAR
PEAK WIND GUSTS (MPH)
PRECIP AMOUNT (IN) 0.00 0.10-0.25 0.01-0.05 0.00
11 AM MIXING HGT (FT) 2800 1800
MAX MIXING HGT (FT) 4100 3500
TRANSPORT WND (MPH) SW 13 N 6
VENT RATE (MPH-FT) 57400 24500
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
THURSDAY
SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. LIGHT
WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS.
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 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.
MONDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS,
BECOMING SOUTHWEST AROUND 5 MPH IN THE AFTERNOON.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
INZ011-182145-
JASPER-
INCLUDING THE CITIES OF RENSSELAER AND DEMOTTE
431 AM CDT TUE AUG 18 2026
TODAY TONIGHT WED WED NIGHT
CLOUD COVER PCLDY MCLDY PCLDY PCLDY
PRECIP TYPE NONE TSTMS SHOWERS NONE
CHANCE PRECIP (%) 20 50 20 10
MAX TEMP (24HR TREND) 80 (+2) 75
MIN RH % (24HR TREND) 63 (+2) 83
MIN TEMP (24HR TREND) 66 (+7) 57
MAX RH % (24HR TREND) 97 (-1) 97
20FT WIND AM (MPH) W 5-7 LGT/VAR
20FT WIND PM (MPH) SW 5-7 LGT/VAR LGT/VAR LGT/VAR
PEAK WIND GUSTS (MPH)
PRECIP AMOUNT (IN) 0.00 0.10-0.25 0.01-0.05 0.00
11 AM MIXING HGT (FT) 3000 1900
MAX MIXING HGT (FT) 4200 3500
TRANSPORT WND (MPH) SW 13 N 8
VENT RATE (MPH-FT) 58800 28000
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
THURSDAY
SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. LIGHT
WINDS.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE MID 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 MID 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. NORTHWEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. LIGHT WINDS.
MONDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. SOUTHWEST WINDS
AROUND 5 MPH.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
INZ019-182145-
BENTON-
INCLUDING THE CITIES OF FOWLER AND OXFORD
531 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED WED NIGHT
CLOUD COVER PCLDY MCLDY MCLDY PCLDY
PRECIP TYPE NONE TSTMS TSTMS NONE
CHANCE PRECIP (%) 10 40 40 10
MAX TEMP (24HR TREND) 80 (+1) 75
MIN RH % (24HR TREND) 62 (+1) 82
MIN TEMP (24HR TREND) 66 (+6) 59
MAX RH % (24HR TREND) 96 (0) 96
20FT WIND AM (MPH) LGT/VAR LGT/VAR
20FT WIND PM (MPH) SW 4-7 LGT/VAR LGT/VAR LGT/VAR
PEAK WIND GUSTS (MPH)
PRECIP AMOUNT (IN) 0.00 0.05-0.10 0.05-0.10 0.00
11 AM MIXING HGT (FT) 3000 1600
MAX MIXING HGT (FT) 4000 3100
TRANSPORT WND (MPH) SW 12 N 5
VENT RATE (MPH-FT) 52000 18600
VENT RATE CATEGORY FAIR POOR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
THURSDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. LIGHT
WINDS.
FRIDAY
SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS.
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 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.
MONDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. SOUTH WINDS AROUND
5 MPH.
MONDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. LIGHT WINDS.
KLUBER
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