Allerton, Illinois Weather Forecast Discussion

805
FXUS63 KILX 072248
AFDILX
Area Forecast Discussion...Updated Aviation
National Weather Service Lincoln IL
548 PM CDT Sun Sep 7 2025
.KEY MESSAGES...
- A warming trend will kick off after today with highs back near
  the 90 mark for the second half of the upcoming week.
- Precip chances are 10% or less over the next seven days.
&&
.DISCUSSION...
Issued at 114 PM CDT Sun Sep 7 2025
This afternoon, high pressure is centered along the mid to upper
Mississippi Valley resulting in fair weather and light winds
across central Illinois. Temps will bottom out in the low to mid
40s once more tonight under a favorable radiational cooling setup.
Surface ridge axis will begin to inch to our east Monday kicking
off a gradual warming trend that will persist into midweek.
A strong upper ridge currently centered over the western CONUS
will shift east across the Great Plains through the latter half
of the upcoming week. This will set the stage for temps to return
well above normal with some highs near or into the 90s possible
south of I-72 Wednesday and then area-wide Thursday through next
weekend. Despite the warmer temperatures, surface high shifts to
New England with ridging extending back into the southern Great
Plains which will not allow favorable low level trajectories for
any notable moisture return into the Midwest. While dew points do
recover some from the current very dry air mass, deep mixing
should generally keep surface dew points in the 50s, if not 40s at
times, through the latter half of the week. This combination of
dry air with synoptic scale subsidence under the upper ridge will
favor dry conditions across central Illinois through next weekend.
Deubelbeiss
&&
.AVIATION...  (For the 00z TAFs through 00z Monday Evening)
Issued at 548 PM CDT Sun Sep 7 2025
VFR with clear skies tonight and few diurnal cu Monday afternoon.
Light/variable winds tonight will become light southeast after
sunrise.
25
&&
.ILX WATCHES/WARNINGS/ADVISORIES...
None.
&&
$$

NWS ILX Office Area Forecast Discussion