Saint Peters Catholic Cemetery Illinois Weather Forecast Discussion

703
FXUS63 KLOT 141914
AFDLOT
Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
214 PM CDT Tue Oct 14 2025
.KEY MESSAGES...
- Some scattered showers expected late tonight into Wed morning,
  mainly north of I-80.
- A period of showers and possible thunderstorms is expected
  late Friday night or Saturday.
&&
.DISCUSSION...
Issued at 214 PM CDT Tue Oct 14 2025
Weak shortwave trough over Nebraska this afternoon will track
eastward across the Cornbelt and western Great Lakes tonight
into Wednesday morning. Forcing is not progged to be
particularly impressive, but mid-upper level height falls in
conjunction with some modest isentropic ascent on the 295-300K
surfaces should be enough to support some scattered showers
later tonight into Wednesday morning. Greatest coverage should
be north of I-80 and especially closer to the IL/WI border. Low
level moisture/cloudiness could get trapped beneath a sharpening
frontal inversion Wednesday, so much of the day could end up
socked in cloud cover. The cloud cover should help keep temps
noticeably cooler than today, though there could be a sharp
temperature gradient near or over our southern/southwestern CWA
where skies could clear out earlier.
While there are some differences in smaller scale details with
time, guidance is largely in agreement on a transition to a more
active, progressive and fairly amplified longwave pattern over
North America late this week through at least the first half of
next week. This should result in more frequent rain chances
along with some typical autumnal temperature swings.
As upper low and longwave trough over the West Coast today moves
eastward, look first for upper ridging to build east into the
area later this week with a warming trend Thursday and
especially into Friday. As the trough and accompanying cold
front move across the area later Friday night or Saturday, it
should be accompanied by showers and possibly a few
thunderstorms. A much cooler (though fairly seasonable) air
mass will filter into the area in the wake of the front Saturday
night through Monday.
&&
.AVIATION /18Z TAFS THROUGH 00Z THURSDAY/...
Issued at 1229 PM CDT Tue Oct 14 2025
Key Aviation Messages for the current TAF period:
- Shower chances overnight into Wednesday morning
MVFR clouds are slowly lifting. There is a chance that they
remain just a bit beyond 18Z in isolated instances, but with
the trend in lifting and clearing the TAFs prevailed VFR
through the remainder of the afternoon. Winds will stay out of
the northeast through the TAF period. Occasional gusts to 20
knots are possible through the afternoon, but not expected to be
persist to merit a mention in the TAFs.
Chances for showers will increase at area terminals after
midnight. As these showers move in overnight, northeast wind
gusts are expected to increase to around 20 knots. There is
still some uncertainty with timing, but the PROB30 was
converted to a TEMPO to highlight the window for the best
chance for showers at terminals. There is lower confidence in
the exact end time of showers as VCSH may linger. However, drier
conditions are expected around the Chicago terminals mid/late
morning. There are better chances for showers festering through
through the morning around KRFD.
Drier VFR conditions are expected on Wednesday afternoon. With
persistent northeast winds, there are some models suggesting a
MVFR cloud deck could move in late morning and linger through
the afternoon. However, confidence is lower so maintained a
SCT020 for the time being.
DK
&&
.LOT WATCHES/WARNINGS/ADVISORIES...
IL...None.
IN...None.
LM...Small Craft Advisory until 1 PM CDT Wednesday for the IL
     nearshore waters.
Small Craft Advisory from 7 PM this evening to 7 AM CDT
     Wednesday for the IN nearshore waters.
&&
$$
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NWS LOT Office Area Forecast Discussion