FXUS63 KILX 230504
AFDILX

Area Forecast Discussion
National Weather Service Lincoln IL
1204 AM CDT Sun Aug 23 2026

.KEY MESSAGES...

- Relatively benign weather is on tap for the upcoming week,
  with the primary chance for any rain around mid week.

- Temperatures will not be out of the ordinary for this time of
  year, with high temperatures near 80 degrees Sunday and Monday
  creeping upward a bit through the week.

&&

.UPDATE...
Issued at 838 PM CDT Sat Aug 22 2026

Spotty showers associated with an outflow boundary have all but
come to an end as they reached along and south of I-70. The rest
of the night will feature benign conditions as light northerly
breezes continue. Cloud cover will be minimal as lows dip into
the upper 50s to lower 60s. An unusually comfortable August night
is in store.

&&

.DISCUSSION...
Issued at 222 PM CDT Sat Aug 22 2026

Diurnal cumulus development has been increasing across the
northern CWA early this afternoon. While surface CAPE's in that 
area are around 2000 J/kg, mid level lapse rates are fairly low.
Between that and dew points only in the low-mid 60s, any 
precipitation this afternoon should mainly be in the form of 
sprinkles. The dry air will result in a couple of pleasant 
nights, with lows around 60 tonight and mid-upper 50s Sunday 
night. 

The overall upper pattern over the next several days will favor
a northwest flow into the Midwest, which will keep any significant
heat or moisture surges at bay. The most interesting feature of
note will be a shortwave diving southeast around mid week. With
most of the available moisture near the Great Lakes, rain 
chances this far south will be more questionable, with 20-30% 
chances mainly centered on Wednesday night. Temperatures creep
upward and are expected to reach the mid 80s by mid week, with
enough moisture in place to get the heat index to around 90 in a
few places.

&&

.AVIATION /06Z TAFS THROUGH 06Z MONDAY/...
Issued at 1203 AM CDT Sun Aug 23 2026

High pressure over the Upper Midwest tonight will slowly spread to 
central Illinois by Sunday evening. A light northwest wind under 10 
kt will prevail across central Illinois through the day Sunday, then 
will give way to light and variable winds under the ridge axis 
Sunday night. Outside of an off chance for some patchy fog that 
reduces visibility early Sunday morning, VFR conditions are 
expected to prevail across central Illinois through the 
period.

&&

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

&&

$$

KEY MESSAGES...Geelhart
UPDATE...Shimon
DISCUSSION...Geelhart
AVIATION...Deubelbeiss