963
FNUS53 KLOT 211045
FWFLOT
FIRE WEATHER PLANNING FORECAST FOR NORTHERN IL AND NORTHWEST IN
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
545 AM CDT FRI AUG 21 2026
DISCUSSION
SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED THIS AFTERNOON
AND EVENING AHEAD OF A COLD FRONT. A FEW STORMS COULD BECOME
SEVERE WITH DAMAGING WINDS AND LARGE HAIL THE MAIN THREATS. DRIER
CONDITIONS ARE EXPECTED THIS WEEKEND INTO EARLY NEXT WEEK,
HOWEVER, THERE IS A LOW CHANCE (15-20%) FOR ISOLATED SHOWERS AND
STORMS SATURDAY AFTERNOON. OTHERWISE, BREEZY NORTH-NORTHWEST WINDS
GUSTING 20-30 MPH ARE EXPECTED SATURDAY AFTERNOON WITH GUSTS TO
AROUND 15-20 MPH ON SUNDAY. MIXING HEIGHTS THIS WEEKEND INTO EARLY
NEXT WEEK ARE FORECAST TO BE AROUND 4000-5000 FT WITH AFTERNOON RH
VALUES AROUND 50-60%.
THERE IS ANOTHER CHANCE FOR SHOWERS AND THUNDERSTORMS TOWARDS THE
MIDDLE OF NEXT WEEK WITH ANOTHER COLD FRONT. THOUGH, CONFIDENCE ON
EXACT TIMING AND COVERAGE IS LOW AT THIS TIME.
ILZ014-212115-
COOK-
INCLUDING THE CITIES OF CHICAGO, SCHAUMBURG, EVANSTON, OAK LAWN,
LEMONT, ORLAND PARK, AND PARK FOREST
545 AM CDT FRI AUG 21 2026
TODAY TONIGHT SAT SAT NIGHT
CLOUD COVER PCLDY PCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 40 60 20 10
MAX TEMP (24HR TREND) 79 (+1) 79
MIN RH % (24HR TREND) 54 (+7) 53
MIN TEMP (24HR TREND) 63 (+2) 59
MAX RH % (24HR TREND) 96 (+7) 91
20FT WIND AM (MPH) LGT/VAR NW 9-10
20FT WIND PM (MPH) SW 4-7 SW 6 NW 9-10 NW 5-6
PEAK WIND GUSTS (MPH) 19
PRECIP AMOUNT (IN) 0.05-0.10 0.05-0.10 0.01-0.05 0.00
11 AM MIXING HGT (FT) 2000 3500
MAX MIXING HGT (FT) 3300 6200
TRANSPORT WND (MPH) SW 9 NW 16
VENT RATE (MPH-FT) 29700 99200
VENT RATE CATEGORY POOR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
SUNDAY
SUNNY. HIGHS IN THE MID 70S. NORTH WINDS 5 TO 10 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. LIGHT WINDS,
BECOMING NORTH AROUND 5 MPH IN THE AFTERNOON.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. NORTHEAST
WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTH WINDS
AROUND 5 MPH.
TUESDAY NIGHT
MOSTLY CLOUDY. LOWS IN THE MID 60S. SOUTH WINDS
AROUND 5 MPH.
WEDNESDAY
PARTLY SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE AFTERNOON. HIGHS IN THE LOWER 80S. SOUTHWEST WINDS AROUND
5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 60S. SOUTHWEST
WINDS AROUND 5 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST WINDS
AROUND 5 MPH, BECOMING NORTH IN THE AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 60S. NORTH WINDS
AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
ILZ006-212115-
LAKE IL-
INCLUDING THE CITIES OF WAUKEGAN, BUFFALO GROVE, MUNDELEIN,
AND GURNEE
545 AM CDT FRI AUG 21 2026
TODAY TONIGHT SAT SAT NIGHT
CLOUD COVER MCLDY PCLDY PCLDY CLEAR
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 60 60 20 10
MAX TEMP (24HR TREND) 76 (-2) 78
MIN RH % (24HR TREND) 59 (+15) 56
MIN TEMP (24HR TREND) 62 (+3) 56
MAX RH % (24HR TREND) 99 (+6) 94
20FT WIND AM (MPH) SW 6-8 NW 10-11
20FT WIND PM (MPH) SW 6-8 SW 6 NW 10-11 NW 5-6
PEAK WIND GUSTS (MPH) 15 19
PRECIP AMOUNT (IN) 0.05-0.10 0.10-0.25 0.01-0.05 0.00
11 AM MIXING HGT (FT) 1500 2900
MAX MIXING HGT (FT) 2600 5200
TRANSPORT WND (MPH) SW 10 NW 16
VENT RATE (MPH-FT) 26000 83200
VENT RATE CATEGORY POOR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
SUNDAY
SUNNY. HIGHS IN THE MID 70S. NORTH WINDS AROUND 10 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. NORTH WINDS AROUND
5 MPH.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTH WINDS
AROUND 5 MPH.
TUESDAY NIGHT
MOSTLY CLOUDY. A CHANCE OF SHOWERS AFTER
MIDNIGHT. LOWS IN THE LOWER 60S. SOUTH WINDS AROUND 5 MPH.
WEDNESDAY
PARTLY SUNNY. A CHANCE OF SHOWERS IN THE AFTERNOON.
HIGHS AROUND 80. SOUTHWEST WINDS AROUND 5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. WEST
WINDS AROUND 5 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST WINDS
AROUND 5 MPH.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT
WINDS.
INZ001-212115-
LAKE IN-
INCLUDING THE CITIES OF GARY, HAMMOND, AND MERRILLVILLE
545 AM CDT FRI AUG 21 2026
TODAY TONIGHT SAT SAT NIGHT
CLOUD COVER PCLDY PCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 30 50 20 10
MAX TEMP (24HR TREND) 79 (+2) 77
MIN RH % (24HR TREND) 58 (+7) 61
MIN TEMP (24HR TREND) 63 (+3) 57
MAX RH % (24HR TREND) 99 (+2) 100
20FT WIND AM (MPH) LGT/VAR NW 9-10
20FT WIND PM (MPH) SW 3-5 LGT/VAR N 9-10 LGT/VAR
PEAK WIND GUSTS (MPH) 19
PRECIP AMOUNT (IN) 0.01-0.05 0.05-0.10 0.01-0.05 0.00
11 AM MIXING HGT (FT) 2000 3300
MAX MIXING HGT (FT) 3100 4700
TRANSPORT WND (MPH) SW 6 N 14
VENT RATE (MPH-FT) 21700 70500
VENT RATE CATEGORY POOR FAIR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
SUNDAY
SUNNY. HIGHS IN THE MID 70S. NORTH WINDS AROUND 10 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. LIGHT WINDS.
MONDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS,
BECOMING NORTH AROUND 5 MPH IN THE AFTERNOON.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTH WINDS
AROUND 5 MPH.
TUESDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE LOWER 60S. SOUTH WINDS AROUND 5 MPH.
WEDNESDAY
PARTLY SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE AFTERNOON. HIGHS IN THE UPPER 70S. SOUTHWEST WINDS AROUND
5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S.
SOUTHWEST WINDS AROUND 5 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST WINDS
AROUND 5 MPH, BECOMING NORTH IN THE AFTERNOON.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT
WINDS.
INZ002-212115-
PORTER-
INCLUDING THE CITIES OF PORTAGE, VALPARAISO, AND CHESTERTON
545 AM CDT FRI AUG 21 2026
TODAY TONIGHT SAT SAT NIGHT
CLOUD COVER PCLDY PCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 20 40 20 10
MAX TEMP (24HR TREND) 78 (0) 76
MIN RH % (24HR TREND) 60 (+11) 64
MIN TEMP (24HR TREND) 63 (+3) 58
MAX RH % (24HR TREND) 98 (+2) 100
20FT WIND AM (MPH) LGT/VAR NW 9-11
20FT WIND PM (MPH) LGT/VAR LGT/VAR N 9-11 LGT/VAR
PEAK WIND GUSTS (MPH) 21
PRECIP AMOUNT (IN) 0.00 0.01-0.05 0.01-0.05 0.00
11 AM MIXING HGT (FT) 2000 2700
MAX MIXING HGT (FT) 3000 3600
TRANSPORT WND (MPH) SW 6 NW 16
VENT RATE (MPH-FT) 21000 57600
VENT RATE CATEGORY POOR FAIR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
SUNDAY
SUNNY. HIGHS IN THE LOWER 70S. NORTH WINDS AROUND
10 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. LIGHT WINDS.
MONDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS,
BECOMING WEST AROUND 5 MPH IN THE AFTERNOON.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHEAST WINDS
AROUND 5 MPH.
TUESDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE LOWER 60S. SOUTH WINDS AROUND 5 MPH.
WEDNESDAY
PARTLY SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE AFTERNOON. HIGHS IN THE UPPER 70S. SOUTH WINDS AROUND
5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. A CHANCE OF SHOWERS IN THE
EVENING. LOWS IN THE LOWER 60S. SOUTHWEST WINDS AROUND 5 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST WINDS
AROUND 5 MPH.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT
WINDS.
ILZ013-212115-
DUPAGE-
INCLUDING THE CITIES OF NAPERVILLE, WHEATON, DOWNERS GROVE,
LOMBARD, AND CAROL STREAM
545 AM CDT FRI AUG 21 2026
TODAY TONIGHT SAT SAT NIGHT
CLOUD COVER PCLDY PCLDY PCLDY CLEAR
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 50 60 20 10
MAX TEMP (24HR TREND) 79 (-1) 79
MIN RH % (24HR TREND) 55 (+13) 53
MIN TEMP (24HR TREND) 63 (+3) 58
MAX RH % (24HR TREND) 97 (+10) 93
20FT WIND AM (MPH) LGT/VAR NW 9-10
20FT WIND PM (MPH) SW 4-8 SW 6 NW 9-10 LGT/VAR
PEAK WIND GUSTS (MPH) 19
PRECIP AMOUNT (IN) 0.05-0.10 0.10-0.25 0.01-0.05 0.00
11 AM MIXING HGT (FT) 1700 3300
MAX MIXING HGT (FT) 3300 5900
TRANSPORT WND (MPH) S 9 NW 18
VENT RATE (MPH-FT) 29700 106200
VENT RATE CATEGORY POOR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
SUNDAY
SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST WINDS 5 TO
10 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
MONDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS,
BECOMING WEST AROUND 5 MPH IN THE AFTERNOON.
MONDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. NORTHEAST WINDS
AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTH WINDS
AROUND 5 MPH.
TUESDAY NIGHT
MOSTLY CLOUDY. LOWS IN THE MID 60S. SOUTH WINDS
AROUND 5 MPH.
WEDNESDAY
PARTLY SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE AFTERNOON. HIGHS AROUND 80. SOUTHWEST WINDS 5 TO 10 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 60S. WEST WINDS
AROUND 5 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST WINDS
AROUND 5 MPH.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. NORTH
WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
ILZ012-212115-
KANE-
INCLUDING THE CITIES OF AURORA AND ELGIN
545 AM CDT FRI AUG 21 2026
TODAY TONIGHT SAT SAT NIGHT
CLOUD COVER PCLDY PCLDY PCLDY CLEAR
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 60 60 20 10
MAX TEMP (24HR TREND) 78 (-2) 78
MIN RH % (24HR TREND) 63 (+21) 59
MIN TEMP (24HR TREND) 62 (+3) 56
MAX RH % (24HR TREND) 98 (+8) 93
20FT WIND AM (MPH) SW 5-7 NW 9-11
20FT WIND PM (MPH) SW 5-7 SW 6 NW 9-11 LGT/VAR
PEAK WIND GUSTS (MPH) 20
PRECIP AMOUNT (IN) 0.10-0.25 0.05-0.10 0.01-0.05 0.00
11 AM MIXING HGT (FT) 1300 2600
MAX MIXING HGT (FT) 3100 5100
TRANSPORT WND (MPH) SW 10 NW 19
VENT RATE (MPH-FT) 31000 102000
VENT RATE CATEGORY POOR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
SUNDAY
SUNNY. HIGHS IN THE MID 70S. NORTHWEST WINDS 5 TO
10 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. LIGHT WINDS.
MONDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS,
BECOMING WEST AROUND 5 MPH IN THE AFTERNOON.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTH WINDS
AROUND 5 MPH.
TUESDAY NIGHT
MOSTLY CLOUDY. A CHANCE OF SHOWERS AFTER
MIDNIGHT. LOWS IN THE LOWER 60S. SOUTH WINDS AROUND 5 MPH.
WEDNESDAY
PARTLY SUNNY. A CHANCE OF SHOWERS IN THE AFTERNOON.
HIGHS IN THE UPPER 70S. SOUTHWEST WINDS 5 TO 10 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. WEST
WINDS AROUND 5 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST WINDS
AROUND 5 MPH.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. NORTH
WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
ILZ005-212115-
MCHENRY-
INCLUDING THE CITIES OF CRYSTAL LAKE, ALGONQUIN, MCHENRY,
AND WOODSTOCK
545 AM CDT FRI AUG 21 2026
TODAY TONIGHT SAT SAT NIGHT
CLOUD COVER MCLDY PCLDY PCLDY CLEAR
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 60 60 20 10
MAX TEMP (24HR TREND) 76 (-3) 78
MIN RH % (24HR TREND) 65 (+25) 57
MIN TEMP (24HR TREND) 61 (+2) 55
MAX RH % (24HR TREND) 98 (+5) 93
20FT WIND AM (MPH) SW 5-8 NW 9-11
20FT WIND PM (MPH) SW 5-8 SW 5-6 NW 9-11 LGT/VAR
PEAK WIND GUSTS (MPH) 18 19
PRECIP AMOUNT (IN) 0.10-0.25 0.05-0.10 0.01-0.05 0.00
11 AM MIXING HGT (FT) 1400 2600
MAX MIXING HGT (FT) 2800 5100
TRANSPORT WND (MPH) SW 12 NW 19
VENT RATE (MPH-FT) 36400 102000
VENT RATE CATEGORY POOR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
SUNDAY
SUNNY. HIGHS IN THE MID 70S. NORTHWEST WINDS 5 TO
10 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. LIGHT WINDS.
MONDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS,
BECOMING WEST AROUND 5 MPH IN THE AFTERNOON.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTH WINDS
AROUND 5 MPH.
TUESDAY NIGHT
MOSTLY CLOUDY. A CHANCE OF SHOWERS AFTER
MIDNIGHT. LOWS IN THE LOWER 60S. SOUTH WINDS AROUND 5 MPH.
WEDNESDAY
PARTLY SUNNY. A CHANCE OF SHOWERS IN THE AFTERNOON.
HIGHS AROUND 80. SOUTHWEST WINDS AROUND 5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. WEST
WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST WINDS
AROUND 5 MPH.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT
WINDS.
ILZ004-212115-
BOONE-
INCLUDING THE CITY OF BELVIDERE
545 AM CDT FRI AUG 21 2026
TODAY TONIGHT SAT SAT NIGHT
CLOUD COVER MCLDY PCLDY PCLDY CLEAR
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 60 60 20 10
MAX TEMP (24HR TREND) 78 (-1) 78
MIN RH % (24HR TREND) 64 (+24) 56
MIN TEMP (24HR TREND) 60 (+1) 54
MAX RH % (24HR TREND) 96 (-1) 93
20FT WIND AM (MPH) SW 5-7 NW 9-11
20FT WIND PM (MPH) SW 5-7 SW 5 NW 9-11 LGT/VAR
PEAK WIND GUSTS (MPH) 19
PRECIP AMOUNT (IN) 0.25-0.50 0.05-0.10 0.01-0.05 0.00
11 AM MIXING HGT (FT) 1500 2800
MAX MIXING HGT (FT) 2600 5600
TRANSPORT WND (MPH) SW 11 NW 19
VENT RATE (MPH-FT) 31200 112000
VENT RATE CATEGORY POOR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
SUNDAY
SUNNY. HIGHS IN THE MID 70S. NORTHWEST WINDS 5 TO
10 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 50S. LIGHT
WINDS.
MONDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. LIGHT WINDS.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTH WINDS
AROUND 5 MPH.
TUESDAY NIGHT
MOSTLY CLOUDY. A CHANCE OF SHOWERS AFTER
MIDNIGHT. LOWS IN THE LOWER 60S. SOUTH WINDS AROUND 5 MPH.
WEDNESDAY
MOSTLY SUNNY. HIGHS AROUND 80. SOUTHWEST WINDS 5 TO
10 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. WEST
WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST WINDS
AROUND 5 MPH.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. LIGHT WINDS.
ILZ011-212115-
DE KALB-
INCLUDING THE CITIES OF DEKALB AND SYCAMORE
545 AM CDT FRI AUG 21 2026
TODAY TONIGHT SAT SAT NIGHT
CLOUD COVER PCLDY PCLDY MCLEAR CLEAR
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 60 60 20 10
MAX TEMP (24HR TREND) 79 (+1) 78
MIN RH % (24HR TREND) 63 (+20) 57
MIN TEMP (24HR TREND) 61 (+3) 55
MAX RH % (24HR TREND) 97 (+4) 93
20FT WIND AM (MPH) SW 5-8 NW 10-11
20FT WIND PM (MPH) SW 5-8 SW 6 NW 10-11 LGT/VAR
PEAK WIND GUSTS (MPH) 15 20
PRECIP AMOUNT (IN) 0.25-0.50 0.01-0.05 0.01-0.05 0.00
11 AM MIXING HGT (FT) 1500 2700
MAX MIXING HGT (FT) 3100 5300
TRANSPORT WND (MPH) SW 11 NW 19
VENT RATE (MPH-FT) 37200 106000
VENT RATE CATEGORY POOR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
SUNDAY
SUNNY. HIGHS IN THE MID 70S. NORTHWEST WINDS 5 TO
10 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 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 IN THE UPPER 50S. LIGHT
WINDS, BECOMING EAST AROUND 5 MPH AFTER MIDNIGHT.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTH WINDS
AROUND 5 MPH.
TUESDAY NIGHT
MOSTLY CLOUDY. A CHANCE OF SHOWERS AND
THUNDERSTORMS AFTER MIDNIGHT. LOWS IN THE LOWER 60S. SOUTH WINDS
AROUND 5 MPH.
WEDNESDAY
PARTLY SUNNY. HIGHS AROUND 80. SOUTHWEST WINDS 5 TO
10 MPH.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 60S. WEST
WINDS AROUND 5 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST WINDS
AROUND 5 MPH.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. NORTHWEST
WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
ILZ003-212115-
WINNEBAGO-
INCLUDING THE CITY OF ROCKFORD
545 AM CDT FRI AUG 21 2026
TODAY TONIGHT SAT SAT NIGHT
CLOUD COVER MCLDY PCLDY MCLEAR CLEAR
PRECIP TYPE TSTMS TSTMS NONE NONE
CHANCE PRECIP (%) 60 50 20
MAX TEMP (24HR TREND) 78 (-2) 79
MIN RH % (24HR TREND) 65 (+29) 53
MIN TEMP (24HR TREND) 60 (0) 53
MAX RH % (24HR TREND) 96 (+8) 93
20FT WIND AM (MPH) SW 6-8 NW 9-11
20FT WIND PM (MPH) SW 6-8 SW 5 NW 9-11 LGT/VAR
PEAK WIND GUSTS (MPH) 16 19
PRECIP AMOUNT (IN) 0.25-0.50 0.01-0.05 0.00 0.00
11 AM MIXING HGT (FT) 1800 2900
MAX MIXING HGT (FT) 2600 5800
TRANSPORT WND (MPH) SW 12 NW 19
VENT RATE (MPH-FT) 33800 116000
VENT RATE CATEGORY POOR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
SUNDAY
SUNNY. HIGHS IN THE MID 70S. NORTHWEST WINDS 5 TO
10 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 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 IN THE MID 50S. LIGHT WINDS.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTH WINDS
AROUND 5 MPH.
TUESDAY NIGHT
MOSTLY CLOUDY. A CHANCE OF SHOWERS AND
THUNDERSTORMS AFTER MIDNIGHT. LOWS IN THE LOWER 60S. SOUTH WINDS
AROUND 5 MPH.
WEDNESDAY
MOSTLY SUNNY. HIGHS AROUND 80. WEST WINDS 5 TO
10 MPH.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 50S. WEST
WINDS AROUND 5 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST WINDS
AROUND 5 MPH.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
ILZ008-212115-
OGLE-
INCLUDING THE CITIES OF ROCHELLE, OREGON, AND BYRON
545 AM CDT FRI AUG 21 2026
TODAY TONIGHT SAT SAT NIGHT
CLOUD COVER PCLDY PCLDY MCLEAR CLEAR
PRECIP TYPE TSTMS TSTMS NONE NONE
CHANCE PRECIP (%) 60 50 20
MAX TEMP (24HR TREND) 79 (0) 79
MIN RH % (24HR TREND) 66 (+31) 55
MIN TEMP (24HR TREND) 61 (+2) 54
MAX RH % (24HR TREND) 96 (+3) 93
20FT WIND AM (MPH) SW 6-8 NW 8-11
20FT WIND PM (MPH) SW 6-8 SW 5 NW 8-11 LGT/VAR
PEAK WIND GUSTS (MPH) 18 19
PRECIP AMOUNT (IN) 0.25-0.50 0.01-0.05 0.00 0.00
11 AM MIXING HGT (FT) 1800 2800
MAX MIXING HGT (FT) 2800 5500
TRANSPORT WND (MPH) SW 12 NW 19
VENT RATE (MPH-FT) 36400 110000
VENT RATE CATEGORY POOR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
SUNDAY
SUNNY. HIGHS IN THE MID 70S. NORTH WINDS 5 TO 10 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 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 IN THE UPPER 50S. LIGHT
WINDS.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTH WINDS
AROUND 5 MPH.
TUESDAY NIGHT
MOSTLY CLOUDY. A CHANCE OF SHOWERS AND
THUNDERSTORMS AFTER MIDNIGHT. LOWS IN THE LOWER 60S. SOUTH WINDS
AROUND 5 MPH.
WEDNESDAY
PARTLY SUNNY. HIGHS AROUND 80. SOUTHWEST WINDS 5 TO
10 MPH.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS AROUND 60. WEST WINDS
AROUND 5 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST WINDS
AROUND 5 MPH.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS AROUND 60. LIGHT WINDS.
ILZ010-212115-
LEE-
INCLUDING THE CITY OF DIXON
545 AM CDT FRI AUG 21 2026
TODAY TONIGHT SAT SAT NIGHT
CLOUD COVER PCLDY PCLDY MCLEAR CLEAR
PRECIP TYPE TSTMS TSTMS NONE NONE
CHANCE PRECIP (%) 60 60 20
MAX TEMP (24HR TREND) 79 (0) 79
MIN RH % (24HR TREND) 66 (+31) 59
MIN TEMP (24HR TREND) 61 (+2) 55
MAX RH % (24HR TREND) 95 (+1) 92
20FT WIND AM (MPH) SW 5-7 NW 9-11
20FT WIND PM (MPH) SW 5-7 SW 5 NW 9-11 LGT/VAR
PEAK WIND GUSTS (MPH) 19
PRECIP AMOUNT (IN) 0.25-0.50 0.01-0.05 0.00 0.00
11 AM MIXING HGT (FT) 1800 2200
MAX MIXING HGT (FT) 3100 5000
TRANSPORT WND (MPH) SW 13 NW 17
VENT RATE (MPH-FT) 43400 85000
VENT RATE CATEGORY POOR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
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
MOSTLY SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS,
BECOMING SOUTH AROUND 5 MPH IN THE AFTERNOON.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS, BECOMING SOUTHEAST AROUND 5 MPH AFTER MIDNIGHT.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHEAST WINDS
AROUND 5 MPH.
TUESDAY NIGHT
MOSTLY CLOUDY. A CHANCE OF SHOWERS AND
THUNDERSTORMS AFTER MIDNIGHT. LOWS IN THE LOWER 60S. SOUTH WINDS
AROUND 5 MPH.
WEDNESDAY
PARTLY SUNNY. HIGHS AROUND 80. SOUTHWEST WINDS 5 TO
10 MPH.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 60S. WEST
WINDS AROUND 5 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST WINDS
AROUND 5 MPH.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 60S. LIGHT
WINDS.
ILZ019-212115-
LA SALLE-
INCLUDING THE CITIES OF OTTAWA, STREATOR, LA SALLE, MENDOTA,
AND MARSEILLES
545 AM CDT FRI AUG 21 2026
TODAY TONIGHT SAT SAT NIGHT
CLOUD COVER PCLDY PCLDY MCLEAR CLEAR
PRECIP TYPE TSTMS TSTMS NONE NONE
CHANCE PRECIP (%) 50 60 20
MAX TEMP (24HR TREND) 80 (+1) 79
MIN RH % (24HR TREND) 61 (+21) 60
MIN TEMP (24HR TREND) 63 (+4) 57
MAX RH % (24HR TREND) 97 (0) 88
20FT WIND AM (MPH) LGT/VAR NW 9-10
20FT WIND PM (MPH) SW 3-6 SW 5 NW 9-10 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) 1700 2300
MAX MIXING HGT (FT) 3500 4700
TRANSPORT WND (MPH) SW 11 NW 18
VENT RATE (MPH-FT) 42000 84600
VENT RATE CATEGORY POOR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
SUNDAY
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. LIGHT WINDS,
BECOMING SOUTH AROUND 5 MPH IN THE AFTERNOON.
MONDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. LIGHT WINDS.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHEAST WINDS
AROUND 5 MPH.
TUESDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE MID 60S. SOUTH WINDS AROUND 5 MPH.
WEDNESDAY
PARTLY SUNNY. HIGHS IN THE LOWER 80S. SOUTHWEST
WINDS AROUND 5 MPH.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 60S. WEST
WINDS AROUND 5 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS AROUND 80. NORTHWEST WINDS AROUND
5 MPH.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 60S. LIGHT
WINDS.
ILZ020-212115-
KENDALL-
INCLUDING THE CITIES OF OSWEGO, YORKVILLE, AND PLANO
545 AM CDT FRI AUG 21 2026
TODAY TONIGHT SAT SAT NIGHT
CLOUD COVER PCLDY PCLDY PCLDY CLEAR
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 50 60 20 10
MAX TEMP (24HR TREND) 79 (-1) 79
MIN RH % (24HR TREND) 62 (+23) 60
MIN TEMP (24HR TREND) 63 (+4) 57
MAX RH % (24HR TREND) 98 (+3) 92
20FT WIND AM (MPH) LGT/VAR NW 9-10
20FT WIND PM (MPH) SW 4-6 SW 5 NW 9-10 LGT/VAR
PEAK WIND GUSTS (MPH) 19
PRECIP AMOUNT (IN) 0.10-0.25 0.01-0.05 0.01-0.05 0.00
11 AM MIXING HGT (FT) 1400 2500
MAX MIXING HGT (FT) 3200 4600
TRANSPORT WND (MPH) SW 10 NW 18
VENT RATE (MPH-FT) 32000 82800
VENT RATE CATEGORY POOR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
SUNDAY
SUNNY. HIGHS IN THE UPPER 70S. NORTH WINDS 5 TO 10 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. LIGHT WINDS.
MONDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS,
BECOMING SOUTH AROUND 5 MPH IN THE AFTERNOON.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTH WINDS
AROUND 5 MPH.
TUESDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE LOWER 60S. SOUTH WINDS AROUND 5 MPH.
WEDNESDAY
PARTLY SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE AFTERNOON. HIGHS AROUND 80. SOUTHWEST WINDS 5 TO 10 MPH.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 60S. WEST
WINDS AROUND 5 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS AROUND 80. NORTHWEST WINDS AROUND
5 MPH.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. NORTHWEST
WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
ILZ021-212115-
GRUNDY-
INCLUDING THE CITIES OF MORRIS, COAL CITY, AND MINOOKA
545 AM CDT FRI AUG 21 2026
TODAY TONIGHT SAT SAT NIGHT
CLOUD COVER PCLDY PCLDY PCLDY CLEAR
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 40 50 20 10
MAX TEMP (24HR TREND) 80 (0) 79
MIN RH % (24HR TREND) 62 (+22) 61
MIN TEMP (24HR TREND) 64 (+5) 58
MAX RH % (24HR TREND) 97 (-2) 91
20FT WIND AM (MPH) LGT/VAR NW 9-10
20FT WIND PM (MPH) SW 3-5 SW 5 NW 9-10 LGT/VAR
PEAK WIND GUSTS (MPH) 18
PRECIP AMOUNT (IN) 0.10-0.25 0.05-0.10 0.01-0.05 0.00
11 AM MIXING HGT (FT) 1600 2300
MAX MIXING HGT (FT) 3500 4500
TRANSPORT WND (MPH) SW 9 NW 18
VENT RATE (MPH-FT) 31500 81000
VENT RATE CATEGORY POOR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
SUNDAY
SUNNY. HIGHS IN THE UPPER 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. LIGHT WINDS,
BECOMING SOUTH AROUND 5 MPH IN THE AFTERNOON.
MONDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 60. LIGHT WINDS.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHEAST WINDS
AROUND 5 MPH.
TUESDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE MID 60S. LIGHT WINDS, BECOMING SOUTH
AROUND 5 MPH AFTER MIDNIGHT.
WEDNESDAY
PARTLY SUNNY. HIGHS IN THE LOWER 80S. SOUTHWEST
WINDS AROUND 5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT
WINDS.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 80S. NORTHWEST WINDS
AROUND 5 MPH.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT
WINDS.
ILZ022-212115-
WILL-
INCLUDING THE CITIES OF JOLIET, BOLINGBROOK, AND WILMINGTON
545 AM CDT FRI AUG 21 2026
TODAY TONIGHT SAT SAT NIGHT
CLOUD COVER PCLDY PCLDY PCLDY CLEAR
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 40 50 20 10
MAX TEMP (24HR TREND) 79 (-1) 79
MIN RH % (24HR TREND) 61 (+18) 60
MIN TEMP (24HR TREND) 63 (+4) 57
MAX RH % (24HR TREND) 98 (+4) 96
20FT WIND AM (MPH) LGT/VAR NW 9-10
20FT WIND PM (MPH) SW 3-5 SW 5 NW 9-10 LGT/VAR
PEAK WIND GUSTS (MPH) 19
PRECIP AMOUNT (IN) 0.05-0.10 0.05-0.10 0.01-0.05 0.00
11 AM MIXING HGT (FT) 1600 2800
MAX MIXING HGT (FT) 3200 5000
TRANSPORT WND (MPH) SW 9 NW 17
VENT RATE (MPH-FT) 28800 85000
VENT RATE CATEGORY POOR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
SUNDAY
SUNNY. HIGHS IN THE MID 70S. NORTHWEST WINDS 5 TO
10 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 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.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHEAST WINDS
AROUND 5 MPH.
TUESDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE LOWER 60S. SOUTH WINDS AROUND 5 MPH.
WEDNESDAY
PARTLY SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE AFTERNOON. HIGHS AROUND 80. SOUTHWEST WINDS AROUND 5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. WEST
WINDS AROUND 5 MPH.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST WINDS
AROUND 5 MPH.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. NORTHWEST
WINDS AROUND 5 MPH IN THE EVENING, BECOMING LIGHT.
ILZ032-212115-
LIVINGSTON-
INCLUDING THE CITIES OF PONTIAC, DWIGHT, AND FAIRBURY
545 AM CDT FRI AUG 21 2026
TODAY TONIGHT SAT SAT NIGHT
CLOUD COVER PCLDY PCLDY MCLEAR CLEAR
PRECIP TYPE TSTMS TSTMS NONE NONE
CHANCE PRECIP (%) 30 50 20
MAX TEMP (24HR TREND) 81 (+2) 80
MIN RH % (24HR TREND) 61 (+17) 60
MIN TEMP (24HR TREND) 64 (+5) 57
MAX RH % (24HR TREND) 97 (0) 93
20FT WIND AM (MPH) LGT/VAR NW 8-10
20FT WIND PM (MPH) LGT/VAR LGT/VAR NW 8-10 LGT/VAR
PEAK WIND GUSTS (MPH) 19
PRECIP AMOUNT (IN) 0.10-0.25 0.05-0.10 0.00 0.00
11 AM MIXING HGT (FT) 2000 2100
MAX MIXING HGT (FT) 3900 4600
TRANSPORT WND (MPH) SW 9 NW 18
VENT RATE (MPH-FT) 35100 82800
VENT RATE CATEGORY POOR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
SUNDAY
SUNNY. HIGHS IN THE UPPER 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. LIGHT WINDS.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHEAST WINDS
AROUND 5 MPH.
TUESDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE MID 60S. LIGHT WINDS, BECOMING SOUTH
AROUND 5 MPH AFTER MIDNIGHT.
WEDNESDAY
PARTLY SUNNY. HIGHS IN THE LOWER 80S. SOUTHWEST
WINDS AROUND 5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT
WINDS.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 80S. NORTHWEST WINDS
AROUND 5 MPH.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT
WINDS.
ILZ023-212115-
KANKAKEE-
INCLUDING THE CITIES OF KANKAKEE, BOURBONNAIS, AND BRADLEY
545 AM CDT FRI AUG 21 2026
TODAY TONIGHT SAT SAT NIGHT
CLOUD COVER PCLDY PCLDY PCLDY CLEAR
PRECIP TYPE TSTMS TSTMS TSTMS NONE
CHANCE PRECIP (%) 30 50 20 10
MAX TEMP (24HR TREND) 79 (-1) 78
MIN RH % (24HR TREND) 59 (+13) 62
MIN TEMP (24HR TREND) 63 (+5) 57
MAX RH % (24HR TREND) 98 (+2) 98
20FT WIND AM (MPH) LGT/VAR NW 8-10
20FT WIND PM (MPH) LGT/VAR LGT/VAR NW 8-10 LGT/VAR
PEAK WIND GUSTS (MPH) 17
PRECIP AMOUNT (IN) 0.05-0.10 0.05-0.10 0.01-0.05 0.00
11 AM MIXING HGT (FT) 1800 2400
MAX MIXING HGT (FT) 3500 4600
TRANSPORT WND (MPH) SW 5 NW 17
VENT RATE (MPH-FT) 21000 78200
VENT RATE CATEGORY POOR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
SUNDAY
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. LIGHT WINDS.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHEAST WINDS
AROUND 5 MPH.
TUESDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT WINDS, BECOMING SOUTH
AROUND 5 MPH AFTER MIDNIGHT.
WEDNESDAY
PARTLY SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE AFTERNOON. HIGHS AROUND 80. SOUTHWEST WINDS AROUND 5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT
WINDS.
THURSDAY
MOSTLY SUNNY. HIGHS AROUND 80. NORTHWEST WINDS AROUND
5 MPH.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT
WINDS.
ILZ039-212115-
FORD-
INCLUDING THE CITIES OF PAXTON AND GIBSON CITY
545 AM CDT FRI AUG 21 2026
TODAY TONIGHT SAT SAT NIGHT
CLOUD COVER PCLDY PCLDY PCLDY CLEAR
PRECIP TYPE NONE TSTMS NONE NONE
CHANCE PRECIP (%) 20 50 10
MAX TEMP (24HR TREND) 80 (0) 79
MIN RH % (24HR TREND) 58 (+9) 60
MIN TEMP (24HR TREND) 64 (+5) 58
MAX RH % (24HR TREND) 96 (+4) 94
20FT WIND AM (MPH) LGT/VAR NW 9-11
20FT WIND PM (MPH) LGT/VAR LGT/VAR NW 9-11 LGT/VAR
PEAK WIND GUSTS (MPH) 19
PRECIP AMOUNT (IN) 0.00 0.10-0.25 0.00 0.00
11 AM MIXING HGT (FT) 2400 2200
MAX MIXING HGT (FT) 4000 4300
TRANSPORT WND (MPH) SW 5 NW 18
VENT RATE (MPH-FT) 24000 77400
VENT RATE CATEGORY POOR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
SUNDAY
SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST WINDS AROUND
5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. LIGHT WINDS.
MONDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHEAST WINDS
AROUND 5 MPH.
TUESDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE LOWER 60S. SOUTHEAST WINDS AROUND
5 MPH.
WEDNESDAY
PARTLY SUNNY. HIGHS IN THE LOWER 80S. SOUTHWEST
WINDS AROUND 5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. WEST
WINDS AROUND 5 MPH.
THURSDAY
SUNNY. HIGHS IN THE LOWER 80S. NORTHWEST WINDS AROUND
5 MPH.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 60S. LIGHT
WINDS.
ILZ033-212115-
IROQUOIS-
INCLUDING THE CITIES OF WATSEKA AND GILMAN
545 AM CDT FRI AUG 21 2026
TODAY TONIGHT SAT SAT NIGHT
CLOUD COVER PCLDY PCLDY PCLDY CLEAR
PRECIP TYPE NONE TSTMS TSTMS NONE
CHANCE PRECIP (%) 20 40 20 10
MAX TEMP (24HR TREND) 80 (0) 79
MIN RH % (24HR TREND) 57 (+8) 60
MIN TEMP (24HR TREND) 63 (+5) 57
MAX RH % (24HR TREND) 97 (+4) 96
20FT WIND AM (MPH) LGT/VAR NW 8-10
20FT WIND PM (MPH) LGT/VAR LGT/VAR NW 8-10 LGT/VAR
PEAK WIND GUSTS (MPH) 18
PRECIP AMOUNT (IN) 0.00 0.10-0.25 0.01-0.05 0.00
11 AM MIXING HGT (FT) 2100 2300
MAX MIXING HGT (FT) 3700 4500
TRANSPORT WND (MPH) SW 5 NW 18
VENT RATE (MPH-FT) 22200 81000
VENT RATE CATEGORY POOR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
SUNDAY
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. LIGHT WINDS.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHEAST WINDS
AROUND 5 MPH.
TUESDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT WINDS.
WEDNESDAY
PARTLY SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE AFTERNOON. HIGHS IN THE LOWER 80S. SOUTHWEST WINDS AROUND
5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT
WINDS.
THURSDAY
MOSTLY SUNNY. HIGHS AROUND 80. WEST WINDS AROUND
5 MPH.
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT
WINDS.
INZ010-212115-
NEWTON-
INCLUDING THE CITIES OF ROSELAWN, KENTLAND, AND MOROCCO
545 AM CDT FRI AUG 21 2026
TODAY TONIGHT SAT SAT NIGHT
CLOUD COVER PCLDY PCLDY PCLDY MCLEAR
PRECIP TYPE NONE TSTMS TSTMS NONE
CHANCE PRECIP (%) 20 40 20 10
MAX TEMP (24HR TREND) 78 (-1) 78
MIN RH % (24HR TREND) 56 (+4) 63
MIN TEMP (24HR TREND) 63 (+6) 57
MAX RH % (24HR TREND) 97 (0) 99
20FT WIND AM (MPH) LGT/VAR NW 8-10
20FT WIND PM (MPH) LGT/VAR LGT/VAR NW 8-10 LGT/VAR
PEAK WIND GUSTS (MPH) 18
PRECIP AMOUNT (IN) 0.00 0.05-0.10 0.01-0.05 0.00
11 AM MIXING HGT (FT) 1700 2700
MAX MIXING HGT (FT) 3500 4600
TRANSPORT WND (MPH) SW 4 NW 18
VENT RATE (MPH-FT) 17500 82800
VENT RATE CATEGORY POOR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
SUNDAY
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. LIGHT WINDS.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. LIGHT WINDS,
BECOMING SOUTH AROUND 5 MPH IN THE AFTERNOON.
TUESDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT WINDS.
WEDNESDAY
PARTLY SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE AFTERNOON. HIGHS IN THE UPPER 70S. SOUTHWEST WINDS AROUND
5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT
WINDS.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. WEST WINDS
AROUND 5 MPH.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 60S. LIGHT
WINDS.
INZ011-212115-
JASPER-
INCLUDING THE CITIES OF RENSSELAER AND DEMOTTE
545 AM CDT FRI AUG 21 2026
TODAY TONIGHT SAT SAT NIGHT
CLOUD COVER PCLDY PCLDY PCLDY MCLEAR
PRECIP TYPE NONE TSTMS TSTMS NONE
CHANCE PRECIP (%) 20 40 20 10
MAX TEMP (24HR TREND) 78 (-1) 77
MIN RH % (24HR TREND) 58 (+6) 63
MIN TEMP (24HR TREND) 63 (+6) 56
MAX RH % (24HR TREND) 97 (-2) 100
20FT WIND AM (MPH) LGT/VAR NW 8-10
20FT WIND PM (MPH) LGT/VAR LGT/VAR NW 8-10 LGT/VAR
PEAK WIND GUSTS (MPH) 19
PRECIP AMOUNT (IN) 0.00 0.05-0.10 0.01-0.05 0.00
11 AM MIXING HGT (FT) 1800 2700
MAX MIXING HGT (FT) 3400 4600
TRANSPORT WND (MPH) SW 5 NW 16
VENT RATE (MPH-FT) 20400 73600
VENT RATE CATEGORY POOR FAIR
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
SUNDAY
SUNNY. HIGHS IN THE MID 70S. NORTHWEST WINDS 5 TO
10 MPH.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. LIGHT WINDS.
MONDAY
MOSTLY SUNNY. HIGHS IN THE MID 70S. LIGHT WINDS,
BECOMING WEST AROUND 5 MPH IN THE AFTERNOON.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. LIGHT WINDS.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHEAST WINDS
AROUND 5 MPH.
TUESDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT WINDS, BECOMING SOUTH
AROUND 5 MPH AFTER MIDNIGHT.
WEDNESDAY
PARTLY SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE AFTERNOON. HIGHS IN THE UPPER 70S. SOUTHWEST WINDS AROUND
5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. A CHANCE OF SHOWERS IN THE
EVENING. LOWS IN THE LOWER 60S. LIGHT WINDS.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. NORTHWEST WINDS
AROUND 5 MPH.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 60S. LIGHT
WINDS.
INZ019-212115-
BENTON-
INCLUDING THE CITIES OF FOWLER AND OXFORD
645 AM EDT FRI AUG 21 2026
TODAY TONIGHT SAT SAT NIGHT
CLOUD COVER PCLDY PCLDY PCLDY MCLEAR
PRECIP TYPE NONE TSTMS TSTMS NONE
CHANCE PRECIP (%) 10 40 20 10
MAX TEMP (24HR TREND) 79 (-1) 78
MIN RH % (24HR TREND) 57 (+4) 63
MIN TEMP (24HR TREND) 63 (+5) 58
MAX RH % (24HR TREND) 97 (+3) 96
20FT WIND AM (MPH) LGT/VAR NW 8-10
20FT WIND PM (MPH) LGT/VAR LGT/VAR NW 8-10 LGT/VAR
PEAK WIND GUSTS (MPH) 19
PRECIP AMOUNT (IN) 0.00 0.05-0.10 0.01-0.05 0.00
11 AM MIXING HGT (FT) 2300 2200
MAX MIXING HGT (FT) 3500 4400
TRANSPORT WND (MPH) W 4 NW 17
VENT RATE (MPH-FT) 17500 74800
VENT RATE CATEGORY POOR GOOD
FORECAST FOR DAYS 3 THROUGH 7
(WINDS ARE 20 FT LEVEL)
SUNDAY
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. LIGHT WINDS.
MONDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 50S. LIGHT
WINDS.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHEAST WINDS
AROUND 5 MPH IN THE MORNING, BECOMING LIGHT.
TUESDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. LOWS IN THE LOWER 60S. LIGHT WINDS.
WEDNESDAY
PARTLY SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE AFTERNOON. HIGHS IN THE UPPER 70S. SOUTHWEST WINDS AROUND
5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY. A CHANCE OF SHOWERS IN THE
EVENING. LOWS IN THE LOWER 60S. LIGHT WINDS.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. WEST WINDS
AROUND 5 MPH.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 60S. LIGHT
WINDS.
YACK
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