FNUS53 KILX 200805 FWFILX Fire Weather Planning Forecast for Central/Southeast Illinois National Weather Service Lincoln IL 305 AM CDT Wed May 20 2026 .DISCUSSION... Vent rates will be most favorable in areas north of Interstate 70 today, where a drier airmass supports deeper mixing. By Thursday, the dry airmass spreads across the entire region, supporting deep mixing heights and good ventilation areawide. Then, as a front lifts across the region on Friday, with accompanying rainfall, low mixing heights will suppress ventilation rates. NOTE: With the conclusion of our spring fire weather season, afternoon updates to this product will be suspended until September 15th. ILZ027>031-036>038-202130- Knox-Stark-Peoria-Marshall-Woodford-Fulton-Tazewell-McLean- Including the cities of Galesburg, Toulon, Peoria, Lacon, Eureka, Canton, Pekin, Bloomington, and Normal 305 AM CDT Wed May 20 2026 Today Tonight Thu Cloud Cover Pcldy Mclear Pcldy Precip Type None None None Chance Precip (%) 0 0 0 Chance of Thunder (%) 0 0 0 Temp (24h trend) 66 (-8) 44 (-10) 69 RH % (24h trend) 42 (-32) 77 (-5) 39 Wind 20ft/early(mph) N 7 G17 NE 8 G19 E 8 G19 Wind 20ft/late(mph) NE 8 NE 6 G19 E 9 Precip Amount 0.00 0.00 0.00 Precip Duration Precip Begin Precip End Mixing Hgt(ft-agl) 4550 5140 1700ft Mixing Temp 58 61 Transport Wnd (mph) NE 15 E 17 Vent Rate (mph-ft) 68250 87380 Vent Rate Category Fair Good Remarks...None. .FORECAST FOR DAYS 3 THROUGH 7... .FRIDAY...Mostly cloudy with showers likely. Lows around 50. Highs in the mid 60s. Minimum RH 70 percent. East winds around 10 mph. .SATURDAY...Mostly cloudy. A chance of showers. Lows in the mid 50s. Highs in the mid 70s. Minimum RH 60 percent. North winds around 5 mph. .SUNDAY...Mostly cloudy. Lows in the upper 50s. Highs in the upper 70s. Minimum RH 57 percent. Northeast winds around 5 mph. .MONDAY...Mostly cloudy. Lows in the upper 50s. Highs in the lower 80s. Minimum RH 54 percent. East winds around 5 mph. .TUESDAY...Mostly cloudy. A chance of showers and thunderstorms. Lows around 60. Highs in the mid 80s. Minimum RH 53 percent. East winds around 5 mph. $$ ILZ040>043-047>053-202130- Schuyler-Mason-Logan-De Witt-Cass-Menard-Scott-Morgan-Sangamon- Christian-Macon- Including the cities of Rushville, Havana, Lincoln, Clinton, Beardstown, Petersburg, Winchester, Jacksonville, Springfield, Taylorville, and Decatur 305 AM CDT Wed May 20 2026 Today Tonight Thu Cloud Cover Pcldy Mclear Pcldy Precip Type None None None Chance Precip (%) 0 0 0 Chance of Thunder (%) 0 0 0 Temp (24h trend) 67 (-9) 46 (-9) 69 RH % (24h trend) 45 (-26) 79 (-8) 41 Wind 20ft/early(mph) N 8 G17 NE 7 G20 NE 8 G19 Wind 20ft/late(mph) NE 7 NE 6 G18 E 9 G17 Precip Amount 0.00 0.00 0.00 Precip Duration Precip Begin Precip End Mixing Hgt(ft-agl) 4210 4600 1700ft Mixing Temp 60 62 Transport Wnd (mph) NE 14 E 17 Vent Rate (mph-ft) 58940 78200 Vent Rate Category Fair Good Remarks...None. .FORECAST FOR DAYS 3 THROUGH 7... .FRIDAY...Showers and a chance of thunderstorms. Lows in the lower 50s. Highs in the upper 60s. Minimum RH 73 percent. Northeast winds around 10 mph. .SATURDAY...Mostly cloudy. A chance of showers. Lows in the mid 50s. Highs in the upper 70s. Minimum RH 58 percent. West winds around 5 mph. .SUNDAY...Mostly cloudy with a chance of showers. Lows in the upper 50s. Highs in the upper 70s. Minimum RH 57 percent. North winds around 5 mph. .MONDAY...Mostly cloudy. Lows in the upper 50s. Highs in the lower 80s. Minimum RH 54 percent. East winds around 5 mph. .TUESDAY...Mostly cloudy. A chance of showers and thunderstorms. Lows in the lower 60s. Highs in the mid 80s. Minimum RH 52 percent. East winds around 5 mph. $$ ILZ044>046-054>057-061-202130- Piatt-Champaign-Vermilion-Moultrie-Douglas-Coles-Edgar-Shelby- Including the cities of Monticello, Champaign, Urbana, Danville, Sullivan, Tuscola, Charleston, Mattoon, Paris, and Shelbyville 305 AM CDT Wed May 20 2026 Today Tonight Thu Cloud Cover Mcldy Pcldy Pcldy Precip Type Showers None None Chance Precip (%) 30 0 0 Chance of Thunder (%) 0 0 0 Temp (24h trend) 66 (-13) 46 (-11) 68 RH % (24h trend) 48 (-20) 84 (-3) 42 Wind 20ft/early(mph) N 8 NE 9 G19 E 10 G21 Wind 20ft/late(mph) NE 8 NE 7 G17 E 10 G17 Precip Amount 0.02 0.00 0.00 Precip Duration 1 Precip Begin 6 AM Precip End 2 PM Mixing Hgt(ft-agl) 3620 4210 1700ft Mixing Temp 60 61 Transport Wnd (mph) NE 16 E 16 Vent Rate (mph-ft) 57920 67360 Vent Rate Category Fair Fair Remarks...None. .FORECAST FOR DAYS 3 THROUGH 7... .FRIDAY...Showers. Lows in the lower 50s. Highs in the upper 60s. Minimum RH 74 percent. Northeast winds around 10 mph. .SATURDAY...Mostly cloudy with showers likely. Lows in the upper 50s. Highs in the upper 70s. Minimum RH 62 percent. West winds around 5 mph. .SUNDAY...Mostly cloudy with a chance of showers. Lows around 60. Highs in the upper 70s. Minimum RH 62 percent. East winds around 5 mph. .MONDAY...Mostly cloudy with a chance of showers and thunderstorms. Lows around 60. Highs in the upper 70s. Minimum RH 60 percent. East winds around 5 mph. .TUESDAY...Mostly cloudy. A chance of showers and thunderstorms. Lows in the lower 60s. Highs in the lower 80s. Minimum RH 57 percent. East winds around 5 mph. $$ ILZ062-063-066>068-071>073-202130- Cumberland-Clark-Effingham-Jasper-Crawford-Clay-Richland-Lawrence- Including the cities of Greenup, Marshall, Effingham, Newton, Robinson, Flora, Olney, and Lawrenceville 305 AM CDT Wed May 20 2026 Today Tonight Thu Cloud Cover Cloudy Pcldy Pcldy Precip Type Tstms None None Chance Precip (%) 50 0 0 Chance of Thunder (%) 20 0 0 Temp (24h trend) 64 (-18) 50 (-10) 69 RH % (24h trend) 65 (-2) 88 (-4) 52 Wind 20ft/early(mph) N 6 NE 6 G19 NE 8 G20 Wind 20ft/late(mph) N 6 NE 6 G17 NE 8 Precip Amount 0.14 0.00 0.00 Precip Duration 2 Precip Begin 6 AM Precip End 5 PM Mixing Hgt(ft-agl) 2320 3370 1700ft Mixing Temp 63 64 Transport Wnd (mph) NE 16 E 16 Vent Rate (mph-ft) 37120 53920 Vent Rate Category Poor Fair Remarks...None. .FORECAST FOR DAYS 3 THROUGH 7... .FRIDAY...Showers and a chance of thunderstorms. Lows in the mid 50s. Highs in the lower 70s. Minimum RH 76 percent. Northeast winds around 5 mph. .SATURDAY...Mostly cloudy. Showers likely. Lows in the lower 60s. Highs in the upper 70s. Minimum RH 59 percent. Southwest winds around 5 mph. .SUNDAY...Mostly cloudy with a chance of showers and thunderstorms. Lows in the lower 60s. Highs in the upper 70s. Minimum RH 60 percent. East winds around 5 mph. .MONDAY...Mostly cloudy with a chance of showers and thunderstorms. Lows in the lower 60s. Highs around 80. Minimum RH 59 percent. East winds around 5 mph. .TUESDAY...Mostly cloudy. A chance of showers and thunderstorms. Lows in the mid 60s. Highs in the lower 80s. Minimum RH 57 percent. Southeast winds around 5 mph. $$ MJA