510
FXUS63 KLOT 141146
AFDLOT

Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
546 AM CST Fri Nov 14 2025

.KEY MESSAGES...

- Unseasonably warm weather expected through Saturday.

- Blustery Saturday afternoon and night behind a cold front,
  then dry and much colder for Sunday.

- Precipitation chances, including the potential for some snow,
  return Monday night into Tuesday.

&&

.DISCUSSION...
Issued at 220 AM CST Fri Nov 14 2025

An expansive ridge centered across the central CONUS will bring
a unseasonably warm conditions to the region though Saturday.
Increasing low-level southwest flow today and especially tonight
will advect an already mild and seasonably moist airmass from
the southern Great Plains to the area. With the expectations for
mostly sunny skies today, thermal profiles via 500 hPa heights
and 850 hPa temps within their respective 90 percentile range
today will support max temps this afternoon ranging from the low
70s southwest to the mid and upper 60s northeast. The daily
record maximum temp of 78F (73F) for Chicago (Rockford) is
(should be) out of reach for today.

40+ knot southwest flow as low as 1-2kft tonight along with
expanding stratus over the area will promote rather mild temps
tonight with lows in the mid 50s. Thermal profiles suggest that
the stratus will be insufficiently deep to generate precip, but
cannot fully rule out a few drizzle drops late tonight given
modest low-level WAA and isentropic ascent in and above the
cloud layer.

A surface low tracking along the Canadian border will bring a
cold front across the area Saturday morning into early
afternoon. Again, the depth of moisture does not support notable
precip, but a few patches of drizzle or sprinkles are possible
with the front. Temps have the potential to match those expected
today, but the onset of post-frontal CAA and morning cloud
cover may limit warming to some extent. Otherwise, expect
northwest gusts over 30 mph at times behind the front Saturday
afternoon and night.

After a colder and blustery day on Sunday, a disorganized
upper- level low over the southwest CONUS is progged to
degenerate into a pair of highly sheared disturbances crossing
the mid-Mississippi River Valley Monday night through Tuesday.
Given the evolution of the upstream low, there remains lower
confidence than desired with respect to prospects for precip
during this time. Low-level thermal profiles will be supportive
of at least a mix of snow for northern portions of the CWA
Monday night into Tuesday as dry easterly flow yields wet-bulb
temps below freezing under a lowering cloud deck. Will need to
follow trends as to whether accumulating snow chances increase
for northern Illinois.

Quiet conditions should briefly return with a passing ridge on
Wednesday ahead of a signal for a more organized mid-latitude
cyclone in the region late next week.

Kluber

&&

.AVIATION /12Z TAFS THROUGH 18Z SATURDAY/...
Issued at 546 AM CST Fri Nov 14 2025

Key messages for the 12Z TAF period:

* A period of LLWS this evening into early Saturday

Expect SW`erlies largely below, but occasionally up around 10
kt during the day today. A low level jet building just off the
surface will provide a period of low level wind shear from mid-
evening into early Saturday morning with 40 to 45 kt of SW flow
at 2 kft AGL. Saturday morning will see W winds between 10 and
15 kt.

Additionally, a SCT sub-3kft deck is expected to move over the
terminals tonight. While coverage looks to remain scattered and
VFR is favored, it`s possible that skies could fill in enough to
foster some MVFR toward the end of the 30-hr period.

Doom

&&

.LOT WATCHES/WARNINGS/ADVISORIES...
IL...None.
IN...None.
LM...None.

&&

$$

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