Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Central Illinois
Issued by NWS Central Illinois
687
FNUS53 KILX 180758
FWFILX
Fire Weather Planning Forecast for Central/Southeast Illinois
National Weather Service Lincoln IL
258 AM CDT Tue Aug 18 2026
.DISCUSSION...
Light and variable winds with poor ventilation rates in place
today and tomorrow. Rain returns to the forecast late this
afternoon into late Wednesday afternoon. RH will be 60-70%.
ILZ027>031-036>038-182115-
Knox-Stark-Peoria-Marshall-Woodford-Fulton-Tazewell-McLean-
Including the cities of Galesburg, Toulon, Peoria, Lacon, Eureka,
Canton, Pekin, Bloomington, and Normal
258 AM CDT Tue Aug 18 2026
Today Tonight Wed
Cloud Cover Pcldy Pcldy Pcldy
Precip Type None Tstms Tstms
Chance Precip (%) 0 40 30
Chance of Thunder (%) 0 20 20
Temp (24h trend) 80 (-2) 65 (+4) 79
RH % (24h trend) 70 (+12) 100 (+1) 71
Wind 20ft/early(mph) Lgt/Var Lgt/Var Lgt/Var
Wind 20ft/late(mph) SW 6 Lgt/Var Lgt/Var
Precip Amount 0.00 0.14 0.04
Precip Duration 2 1
Precip Begin 6 PM Continuing
Precip End Continuing 6 PM
Mixing Hgt(ft-agl) 3070 3470
1700ft Mixing Temp 78 78
Transport Wnd (mph) SW 13 N 8
Vent Rate (mph-ft) 39910 27760
Vent Rate Category Poor Poor
Remarks...None.
.FORECAST FOR DAYS 3 THROUGH 7...
.THURSDAY...Partly cloudy. Lows in the lower 60s. Highs in the
upper 70s. Minimum RH 65 percent. Light winds.
.FRIDAY...Mostly clear. Lows in the lower 60s. Highs around 80.
Minimum RH 70 percent. Southeast winds around 5 mph.
.SATURDAY...Partly cloudy. A chance of showers. Lows in the mid
60s. Highs around 80. Minimum RH 71 percent. West winds around
5 mph.
.SUNDAY...Mostly clear. Lows in the lower 60s. Highs in the upper
70s. Minimum RH 70 percent. Northwest winds around 5 mph.
.MONDAY...Partly cloudy. Lows in the lower 60s. Highs in the
upper 70s. Minimum RH 74 percent. Southeast winds around 5 mph.
$$
ILZ040>043-047>053-182115-
Schuyler-Mason-Logan-De Witt-Cass-Menard-Scott-Morgan-Sangamon-
Christian-Macon-
Including the cities of Rushville, Havana, Lincoln, Clinton,
Beardstown, Petersburg, Winchester, Jacksonville, Springfield,
Taylorville, and Decatur
258 AM CDT Tue Aug 18 2026
Today Tonight Wed
Cloud Cover Pcldy Pcldy Mcldy
Precip Type None Tstms Tstms
Chance Precip (%) 0 50 50
Chance of Thunder (%) 0 20 20
Temp (24h trend) 84 (+2) 66 (+4) 80
RH % (24h trend) 61 (+5) 100 (+1) 71
Wind 20ft/early(mph) Lgt/Var Lgt/Var Lgt/Var
Wind 20ft/late(mph) SW 5 Lgt/Var Lgt/Var
Precip Amount 0.00 0.15 0.10
Precip Duration 1 2
Precip Begin 12 AM Continuing
Precip End Continuing Continuing
Mixing Hgt(ft-agl) 3500 2680
1700ft Mixing Temp 79 79
Transport Wnd (mph) SW 10 N 7
Vent Rate (mph-ft) 35000 18760
Vent Rate Category Poor Poor
Remarks...None.
.FORECAST FOR DAYS 3 THROUGH 7...
.THURSDAY...Partly cloudy. Lows in the lower 60s. Highs around
80. Minimum RH 64 percent. Light winds.
.FRIDAY...Mostly clear. Lows in the lower 60s. Highs in the lower
80s. Minimum RH 63 percent. Light winds.
.SATURDAY...Mostly clear. Lows in the mid 60s. Highs in the lower
80s. Minimum RH 65 percent. West winds around 5 mph.
.SUNDAY...Mostly clear. Lows in the lower 60s. Highs around 80.
Minimum RH 63 percent. North winds around 5 mph.
.MONDAY...Partly cloudy. Lows in the lower 60s. Highs around 80.
Minimum RH 67 percent. Southeast winds around 5 mph.
$$
ILZ044>046-054>057-061-182115-
Piatt-Champaign-Vermilion-Moultrie-Douglas-Coles-Edgar-Shelby-
Including the cities of Monticello, Champaign, Urbana, Danville,
Sullivan, Tuscola, Charleston, Mattoon, Paris, and Shelbyville
258 AM CDT Tue Aug 18 2026
Today Tonight Wed
Cloud Cover Pcldy Pcldy Mcldy
Precip Type None Showers Tstms
Chance Precip (%) 0 30 40
Chance of Thunder (%) 0 0 40
Temp (24h trend) 82 (+1) 65 (+3) 79
RH % (24h trend) 61 (-3) 100 (+1) 74
Wind 20ft/early(mph) Lgt/Var Lgt/Var Lgt/Var
Wind 20ft/late(mph) Lgt/Var Lgt/Var Lgt/Var
Precip Amount 0.00 0.02 0.13
Precip Duration 1 2
Precip Begin 1 AM Continuing
Precip End Continuing Continuing
Mixing Hgt(ft-agl) 3930 2490
1700ft Mixing Temp 77 78
Transport Wnd (mph) W 10 NW 7
Vent Rate (mph-ft) 39300 17430
Vent Rate Category Poor Poor
Remarks...None.
.FORECAST FOR DAYS 3 THROUGH 7...
.THURSDAY...Partly cloudy. A chance of showers. Lows in the lower
60s. Highs around 80. Minimum RH 66 percent. Northeast winds
around 5 mph.
.FRIDAY...Mostly clear. Lows around 60. Highs in the lower 80s.
Minimum RH 63 percent. Light winds.
.SATURDAY...Mostly clear. Lows in the lower 60s. Highs in the
lower 80s. Minimum RH 67 percent. West winds around 5 mph.
.SUNDAY...Mostly clear. Lows around 60. Highs in the upper 70s.
Minimum RH 64 percent. North winds around 5 mph.
.MONDAY...Partly cloudy. Lows around 60. Highs in the upper 70s.
Minimum RH 66 percent. East winds around 5 mph.
$$
ILZ062-063-066>068-071>073-182115-
Cumberland-Clark-Effingham-Jasper-Crawford-Clay-Richland-Lawrence-
Including the cities of Greenup, Marshall, Effingham, Newton,
Robinson, Flora, Olney, and Lawrenceville
258 AM CDT Tue Aug 18 2026
Today Tonight Wed
Cloud Cover Mclear Pcldy Mcldy
Precip Type None None Tstms
Chance Precip (%) 0 0 60
Chance of Thunder (%) 0 0 40
Temp (24h trend) 83 (0) 66 (+2) 82
RH % (24h trend) 53 (-9) 99 (0) 71
Wind 20ft/early(mph) Lgt/Var Lgt/Var Lgt/Var
Wind 20ft/late(mph) Lgt/Var Lgt/Var Lgt/Var
Precip Amount 0.00 0.00 0.20
Precip Duration 3
Precip Begin 6 AM
Precip End Continuing
Mixing Hgt(ft-agl) 3980 2650
1700ft Mixing Temp 78 80
Transport Wnd (mph) W 7 SW 7
Vent Rate (mph-ft) 27860 18550
Vent Rate Category Poor Poor
Remarks...None.
.FORECAST FOR DAYS 3 THROUGH 7...
.THURSDAY...Mostly cloudy. A chance of showers and thunderstorms.
Lows in the mid 60s. Highs in the lower 80s. Minimum RH
66 percent. Northeast winds around 5 mph.
.FRIDAY...Mostly clear. Lows in the lower 60s. Highs in the lower
80s. Minimum RH 58 percent. Light winds.
.SATURDAY...Mostly clear. Lows in the lower 60s. Highs in the mid
80s. Minimum RH 61 percent. West winds around 5 mph.
.SUNDAY...Mostly clear. Lows in the lower 60s. Highs in the lower
80s. Minimum RH 57 percent. North winds around 5 mph.
.MONDAY...Partly cloudy. Lows in the lower 60s. Highs in the
lower 80s. Minimum RH 59 percent. East winds around 5 mph.
$$
Copple