Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Central Illinois
Issued by NWS Central Illinois
611
FNUS53 KILX 200748
FWFILX
Fire Weather Planning Forecast for Central/Southeast Illinois
National Weather Service Lincoln IL
248 AM CDT Thu Aug 20 2026
.DISCUSSION...
Light and variable winds with poor ventilation rates in place
today and tomorrow. There could be some sprinkles/light rain in
south central IL this afternoon, but rainfall amounts should be
minimal. Friday there is a 20-40% chance of additional showers. RH
will be 50-60%.
ILZ027>031-036>038-202115-
Knox-Stark-Peoria-Marshall-Woodford-Fulton-Tazewell-McLean-
Including the cities of Galesburg, Toulon, Peoria, Lacon, Eureka,
Canton, Pekin, Bloomington, and Normal
248 AM CDT Thu Aug 20 2026
Today Tonight Fri
Cloud Cover Mclear Mclear Mclear
Precip Type None None Tstms
Chance Precip (%) 0 0 30
Chance of Thunder (%) 0 0 20
Temp (24h trend) 80 (-3) 59 (-5) 82
RH % (24h trend) 56 (-15) 99 (0) 65
Wind 20ft/early(mph) Lgt/Var Lgt/Var Lgt/Var
Wind 20ft/late(mph) Lgt/Var Lgt/Var SW 5
Precip Amount 0.00 0.00 0.00
Precip Duration 1
Precip Begin 2 PM
Precip End Continuing
Mixing Hgt(ft-agl) 4130 3400
1700ft Mixing Temp 76 77
Transport Wnd (mph) N 6 W 10
Vent Rate (mph-ft) 24780 34000
Vent Rate Category Poor Poor
Remarks...None.
.FORECAST FOR DAYS 3 THROUGH 7...
.SATURDAY...Mostly clear. A chance of showers and thunderstorms.
Lows in the mid 60s. Highs around 80. Minimum RH 64 percent.
Northwest winds around 5 mph.
.SUNDAY...Mostly clear. Lows around 60. Highs in the upper 70s.
Minimum RH 59 percent. Northwest winds around 5 mph.
.MONDAY...Partly cloudy. Lows in the upper 50s. Highs in the
upper 70s. Minimum RH 60 percent. Light winds.
.TUESDAY...Partly cloudy. Lows around 60. Highs in the lower 80s.
Minimum RH 64 percent. Southeast winds around 5 mph.
.WEDNESDAY...Partly cloudy. Lows in the mid 60s. Highs in the
lower 80s. Minimum RH 68 percent. Southwest winds around 5 mph.
$$
ILZ040>043-047>053-202115-
Schuyler-Mason-Logan-De Witt-Cass-Menard-Scott-Morgan-Sangamon-
Christian-Macon-
Including the cities of Rushville, Havana, Lincoln, Clinton,
Beardstown, Petersburg, Winchester, Jacksonville, Springfield,
Taylorville, and Decatur
248 AM CDT Thu Aug 20 2026
Today Tonight Fri
Cloud Cover Mclear Mclear Mclear
Precip Type None None None
Chance Precip (%) 0 0 0
Chance of Thunder (%) 0 0 0
Temp (24h trend) 82 (0) 61 (-5) 85
RH % (24h trend) 57 (-14) 100 (+2) 57
Wind 20ft/early(mph) Lgt/Var Lgt/Var Lgt/Var
Wind 20ft/late(mph) Lgt/Var Lgt/Var Lgt/Var
Precip Amount 0.00 0.00 0.00
Precip Duration
Precip Begin
Precip End
Mixing Hgt(ft-agl) 4160 4340
1700ft Mixing Temp 79 79
Transport Wnd (mph) N 8 W 10
Vent Rate (mph-ft) 33280 43400
Vent Rate Category Poor Poor
Remarks...None.
.FORECAST FOR DAYS 3 THROUGH 7...
.SATURDAY...Mostly clear. Lows in the mid 60s. Highs in the lower
80s. Minimum RH 57 percent. West winds around 5 mph.
.SUNDAY...Mostly clear. Lows in the lower 60s. Highs around 80.
Minimum RH 51 percent. Northwest winds around 5 mph.
.MONDAY...Partly cloudy. Lows in the upper 50s. Highs around 80.
Minimum RH 53 percent. East winds around 5 mph.
.TUESDAY...Partly cloudy. Lows in the lower 60s. Highs in the
lower 80s. Minimum RH 56 percent. Southeast winds around 5 mph.
.WEDNESDAY...Partly cloudy. Lows in the mid 60s. Highs in the mid
80s. Minimum RH 59 percent. Southwest winds around 5 mph.
$$
ILZ044>046-054>057-061-202115-
Piatt-Champaign-Vermilion-Moultrie-Douglas-Coles-Edgar-Shelby-
Including the cities of Monticello, Champaign, Urbana, Danville,
Sullivan, Tuscola, Charleston, Mattoon, Paris, and Shelbyville
248 AM CDT Thu Aug 20 2026
Today Tonight Fri
Cloud Cover Mclear Mclear Mclear
Precip Type None None None
Chance Precip (%) 0 0 0
Chance of Thunder (%) 0 0 0
Temp (24h trend) 82 (0) 60 (-6) 84
RH % (24h trend) 62 (-11) 100 (+2) 56
Wind 20ft/early(mph) Lgt/Var Lgt/Var Lgt/Var
Wind 20ft/late(mph) NE 5 Lgt/Var Lgt/Var
Precip Amount 0.00 0.00 0.00
Precip Duration
Precip Begin
Precip End
Mixing Hgt(ft-agl) 3910 3730
1700ft Mixing Temp 78 77
Transport Wnd (mph) NE 9 W 9
Vent Rate (mph-ft) 35190 33570
Vent Rate Category Poor Poor
Remarks...None.
.FORECAST FOR DAYS 3 THROUGH 7...
.SATURDAY...Mostly clear. A chance of showers. Lows in the mid
60s. Highs in the lower 80s. Minimum RH 62 percent. West winds
around 5 mph.
.SUNDAY...Mostly clear. Lows around 60. Highs in the upper 70s.
Minimum RH 56 percent. Northwest winds around 5 mph.
.MONDAY...Partly cloudy. Lows in the upper 50s. Highs in the
upper 70s. Minimum RH 54 percent. Light winds.
.TUESDAY...Mostly clear. Lows in the upper 50s. Highs in the
lower 80s. Minimum RH 58 percent. East winds around 5 mph.
.WEDNESDAY...Partly cloudy. Lows in the lower 60s. Highs in the
mid 80s. Minimum RH 61 percent. Southwest winds around 5 mph.
$$
ILZ062-063-066>068-071>073-202115-
Cumberland-Clark-Effingham-Jasper-Crawford-Clay-Richland-Lawrence-
Including the cities of Greenup, Marshall, Effingham, Newton,
Robinson, Flora, Olney, and Lawrenceville
248 AM CDT Thu Aug 20 2026
Today Tonight Fri
Cloud Cover Pcldy Mclear Mclear
Precip Type None None None
Chance Precip (%) 0 0 0
Chance of Thunder (%) 0 0 0
Temp (24h trend) 83 (0) 62 (-4) 84
RH % (24h trend) 63 (-8) 100 (+1) 53
Wind 20ft/early(mph) Lgt/Var Lgt/Var Lgt/Var
Wind 20ft/late(mph) NE 5 Lgt/Var Lgt/Var
Precip Amount 0.00 0.00 0.00
Precip Duration
Precip Begin
Precip End
Mixing Hgt(ft-agl) 3750 4220
1700ft Mixing Temp 80 79
Transport Wnd (mph) NE 9 NW 8
Vent Rate (mph-ft) 33750 33760
Vent Rate Category Poor Poor
Remarks...None.
.FORECAST FOR DAYS 3 THROUGH 7...
.SATURDAY...Mostly clear. A chance of showers. Lows in the mid
60s. Highs in the mid 80s. Minimum RH 56 percent. West winds
around 5 mph.
.SUNDAY...Mostly clear. Lows in the lower 60s. Highs in the lower
80s. Minimum RH 49 percent. Northwest winds around 5 mph.
.MONDAY...Partly cloudy. Lows in the upper 50s. Highs in the
lower 80s. Minimum RH 49 percent. Light winds.
.TUESDAY...Partly cloudy. Lows in the lower 60s. Highs in the mid
80s. Minimum RH 52 percent. East winds around 5 mph.
.WEDNESDAY...Partly cloudy. Lows in the mid 60s. Highs in the mid
80s. Minimum RH 54 percent. South winds around 5 mph.
$$
Copple