660
FNUS53 KILX 170637
FWFILX
FIRE WEATHER PLANNING FORECAST FOR CENTRAL/SOUTHEAST ILLINOIS
NATIONAL WEATHER SERVICE LINCOLN IL
137 AM CDT THU SEP 17 2026
DISCUSSION
A FRONTAL BOUNDARY WILL LINGER OVER CENTRAL IL FOR THE NEXT FEW
DAYS. THIS WILL CAUSE PERIODS OF SHOWERS AND STORMS, AND MOSTLY
CLOUDY SKIES. IN ADDITION, WINDS WILL BE LIGHT AND VARIABLE IN THE
VICINITY OF THE FRONT. AS A RESULT, LOW MIXING HEIGHTS AND POOR
VENT RATES WILL BE COMMON.
ILZ027>031-036>038-172115-
KNOX-STARK-PEORIA-MARSHALL-WOODFORD-FULTON-TAZEWELL-MCLEAN-
INCLUDING THE CITIES OF GALESBURG, TOULON, PEORIA, LACON, EUREKA,
CANTON, PEKIN, BLOOMINGTON, AND NORMAL
137 AM CDT THU SEP 17 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 40 20 30
CHANCE OF THUNDER (%) 40 20 20
TEMP (24H TREND) 88 (+7) 65 (-3) 83
RH % (24H TREND) 66 (-15) 100 (0) 67
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR E 5
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR E 5
PRECIP AMOUNT 0.18 0.02 0.06
PRECIP DURATION 1 1 1
PRECIP BEGIN 6 AM 11 PM CONTINUING
PRECIP END 12 PM CONTINUING 1 PM
MIXING HGT(FT-AGL) 2710 3310
1700FT MIXING TEMP 85 79
TRANSPORT WND (MPH) W 8 E 9
VENT RATE (MPH-FT) 21680 29790
VENT RATE CATEGORY POOR POOR
REMARKS...NONE.
FORECAST FOR DAYS 3 THROUGH 7
SATURDAY
MOSTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE UPPER
60S. HIGHS IN THE UPPER 80S. MINIMUM RH 60 PERCENT. SOUTHEAST
WINDS AROUND 5 MPH.
SUNDAY
MOSTLY CLOUDY WITH SHOWERS LIKELY AND A CHANCE OF
THUNDERSTORMS. NOT AS WARM. LOWS IN THE UPPER 60S. HIGHS IN THE
UPPER 70S. MINIMUM RH 80 PERCENT. NORTHWEST WINDS AROUND 5 MPH.
MONDAY
MOSTLY CLOUDY WITH SHOWERS LIKELY AND A CHANCE OF
THUNDERSTORMS. LOWS AROUND 60. HIGHS AROUND 70. MINIMUM RH
80 PERCENT. NORTHEAST WINDS AROUND 10 MPH.
TUESDAY
MOSTLY CLOUDY. LOWS IN THE UPPER 50S. HIGHS IN THE
LOWER 70S. MINIMUM RH 67 PERCENT. NORTHEAST WINDS AROUND 10 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS IN THE MID 50S. HIGHS IN THE MID
70S. MINIMUM RH 64 PERCENT. NORTH WINDS AROUND 5 MPH.
ILZ040>043-047>053-172115-
SCHUYLER-MASON-LOGAN-DE WITT-CASS-MENARD-SCOTT-MORGAN-SANGAMON-
CHRISTIAN-MACON-
INCLUDING THE CITIES OF RUSHVILLE, HAVANA, LINCOLN, CLINTON,
BEARDSTOWN, PETERSBURG, WINCHESTER, JACKSONVILLE, SPRINGFIELD,
TAYLORVILLE, AND DECATUR
137 AM CDT THU SEP 17 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 20 20
CHANCE OF THUNDER (%) 0 20 20
TEMP (24H TREND) 95 (+6) 68 (-2) 91
RH % (24H TREND) 48 (-12) 100 (+1) 54
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.00 0.03 0.06
PRECIP DURATION 1 1
PRECIP BEGIN 9 PM CONTINUING
PRECIP END CONTINUING CONTINUING
MIXING HGT(FT-AGL) 3640 4320
1700FT MIXING TEMP 90 85
TRANSPORT WND (MPH) W 9 E 7
VENT RATE (MPH-FT) 32760 30240
VENT RATE CATEGORY POOR POOR
REMARKS...NONE.
FORECAST FOR DAYS 3 THROUGH 7
SATURDAY
PARTLY CLOUDY. LOWS AROUND 70. HIGHS IN THE LOWER
90S. MINIMUM RH 44 PERCENT. SOUTH WINDS AROUND 5 MPH.
SUNDAY
MOSTLY CLOUDY. A CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS IN THE UPPER 60S. HIGHS IN THE MID 80S. MINIMUM RH
60 PERCENT. WEST WINDS AROUND 5 MPH.
MONDAY
MOSTLY CLOUDY WITH SHOWERS LIKELY AND A CHANCE OF
THUNDERSTORMS. LOWS IN THE LOWER 60S. HIGHS IN THE MID 70S.
MINIMUM RH 70 PERCENT. NORTHEAST WINDS AROUND 5 MPH.
TUESDAY
MOSTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE UPPER
50S. HIGHS IN THE MID 70S. MINIMUM RH 60 PERCENT. NORTHEAST WINDS
AROUND 5 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS IN THE UPPER 50S. HIGHS IN THE
UPPER 70S. MINIMUM RH 56 PERCENT. NORTHEAST WINDS AROUND 5 MPH.
ILZ044>046-054>057-061-172115-
PIATT-CHAMPAIGN-VERMILION-MOULTRIE-DOUGLAS-COLES-EDGAR-SHELBY-
INCLUDING THE CITIES OF MONTICELLO, CHAMPAIGN, URBANA, DANVILLE,
SULLIVAN, TUSCOLA, CHARLESTON, MATTOON, PARIS, AND SHELBYVILLE
137 AM CDT THU SEP 17 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 10 30 30
CHANCE OF THUNDER (%) 10 20 30
TEMP (24H TREND) 95 (+4) 67 (-4) 89
RH % (24H TREND) 44 (-14) 100 (+3) 54
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.02 0.02 0.02
PRECIP DURATION 1 2 1
PRECIP BEGIN 6 AM 7 PM CONTINUING
PRECIP END 12 PM CONTINUING 12 PM
MIXING HGT(FT-AGL) 3920 4330
1700FT MIXING TEMP 89 83
TRANSPORT WND (MPH) W 9 NE 7
VENT RATE (MPH-FT) 35280 30310
VENT RATE CATEGORY POOR POOR
REMARKS...NONE.
FORECAST FOR DAYS 3 THROUGH 7
SATURDAY
PARTLY CLOUDY. LOWS IN THE UPPER 60S. HIGHS IN THE
LOWER 90S. MINIMUM RH 44 PERCENT. SOUTHEAST WINDS AROUND 5 MPH.
SUNDAY
MOSTLY CLOUDY. A CHANCE OF SHOWERS. LOWS AROUND 70.
HIGHS IN THE MID 80S. MINIMUM RH 56 PERCENT. WEST WINDS AROUND
5 MPH.
MONDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 60S. HIGHS IN THE UPPER 70S.
MINIMUM RH 61 PERCENT. NORTHEAST WINDS AROUND 5 MPH.
TUESDAY
MOSTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE UPPER
50S. HIGHS IN THE MID 70S. MINIMUM RH 57 PERCENT. NORTHEAST WINDS
AROUND 5 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS IN THE UPPER 50S. HIGHS IN THE
UPPER 70S. MINIMUM RH 55 PERCENT. NORTH WINDS AROUND 5 MPH.
ILZ062-063-066>068-071>073-172115-
CUMBERLAND-CLARK-EFFINGHAM-JASPER-CRAWFORD-CLAY-RICHLAND-LAWRENCE-
INCLUDING THE CITIES OF GREENUP, MARSHALL, EFFINGHAM, NEWTON,
ROBINSON, FLORA, OLNEY, AND LAWRENCEVILLE
137 AM CDT THU SEP 17 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR PCLDY MCLEAR
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 10 30
CHANCE OF THUNDER (%) 0 10 20
TEMP (24H TREND) 98 (+2) 71 (-1) 93
RH % (24H TREND) 39 (-11) 100 (+9) 46
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) W 5 LGT/VAR LGT/VAR
PRECIP AMOUNT 0.00 0.01 0.07
PRECIP DURATION 1 1
PRECIP BEGIN 7 PM CONTINUING
PRECIP END CONTINUING CONTINUING
MIXING HGT(FT-AGL) 5400 6530
1700FT MIXING TEMP 92 91
TRANSPORT WND (MPH) W 9 NW 7
VENT RATE (MPH-FT) 48600 45710
VENT RATE CATEGORY FAIR POOR
REMARKS...NONE.
FORECAST FOR DAYS 3 THROUGH 7
SATURDAY
MOSTLY CLEAR. LOWS IN THE UPPER 60S. HIGHS IN THE MID
90S. MINIMUM RH 35 PERCENT. SOUTH WINDS AROUND 5 MPH.
SUNDAY
PARTLY CLOUDY. LOWS IN THE LOWER 70S. HIGHS IN THE
LOWER 90S. MINIMUM RH 40 PERCENT. WEST WINDS AROUND 5 MPH.
MONDAY
PARTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE UPPER
60S. HIGHS IN THE MID 80S. MINIMUM RH 48 PERCENT. NORTHEAST WINDS
AROUND 5 MPH.
TUESDAY
MOSTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE LOWER
60S. HIGHS IN THE LOWER 80S. MINIMUM RH 49 PERCENT. NORTHEAST
WINDS AROUND 5 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS AROUND 60. HIGHS IN THE LOWER
80S. MINIMUM RH 48 PERCENT. NORTH WINDS AROUND 5 MPH.
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