Sherman Weather weather

000
FLUS43 KILX 201905
HWOILX

Hazardous Weather Outlook
National Weather Service Lincoln IL
205 PM CDT Tue Oct 20 2026

ILZ027>031-036>038-040>057-061>063-066>068-071>073-211915-
Knox-Stark-Peoria-Marshall-Woodford-Fulton-Tazewell-McLean-Schuyler-
Mason-Logan-De Witt-Piatt-Champaign-Vermilion-Cass-Menard-Scott-
Morgan-Sangamon-Christian-Macon-Moultrie-Douglas-Coles-Edgar-Shelby-
Cumberland-Clark-Effingham-Jasper-Crawford-Clay-Richland-Lawrence-
205 PM CDT Tue Oct 20 2026

This Hazardous Weather Outlook is for central Illinois, east 
central Illinois, southeast Illinois and west central Illinois.

.DAY ONE...Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated tonight.

$$

25

000
FXUS63 KILX 201733
AFDILX

Area Forecast Discussion
National Weather Service Lincoln IL
1233 PM CDT Tue Oct 20 2026

.KEY MESSAGES...

- Dry conditions and tranquil weather prevail across central and
  southeast Illinois through this weekend.

- Above normal temperatures will dominate the region, with
  afternoon highs climbing into the mid to upper 70s.

&&

.DISCUSSION...
Issued at 1233 PM CDT Tue Oct 20 2026

Expansive surface high pressure centered south of James Bay 
extends southwest into the mid and lower Mississippi Valley 
this afternoon. Broad subsidence and very dry air below 500 mb
will lead to clear skies through tonight. High temperatures to 
peak in the lower 70s today, followed by overnight lows in the
mid 40s.

A moderating trend begins Wednesday and continues through 
this weekend as upper level ridging amplifies overhead. Suite of
model guidance indicates 850 hPa temperatures warming to +11C 
to +13C through this period. Afternoon mix-down of this air will
lead to daily highs in the mid 70s through Friday, then upper
70s to around 80F this weekend when southwest low level flow
becomes better established. Forecast soundings show daytime 
boundary layer mixing reducing afternoon dewpoints into the 40s,
yielding minimum relative humidity values between 30 and 40 
percent. Normally in late October this would result in an
enhanced risk of fire spread, but a weak MSLP gradient will
promote light winds under 10 mph through Friday.

A transition in the upper air pattern begins Monday into 
Tuesday as a potent upper-level trough traverses the northern 
Plains and lifts toward the Upper Midwest. The ECMWF-AI and 
operational ECMWF-Ens have remained consistent with a slightly 
slower frontal passage than the GEFS members, bringing the 
attendant cold front into western Illinois Monday evening and 
clearing southeast Illinois Tuesday afternoon. The NBM 
introduces slight chance PoPs (15 percent) west of the Illinois
River Monday afternoon. With a lack of upper level support and
projected dry airmass, models generally show a dry frontal
passage for the remainder of the CWA.  
 
&&

.AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/...
Issued at 1233 PM CDT Tue Oct 20 2026

VFR/SKC and light winds 5 kt or less through Wed morning.

&&

.ILX WATCHES/WARNINGS/ADVISORIES...
None.

&&

$$

KEY MESSAGES...25
DISCUSSION...25
AVIATION...25