Peotone Weather
National Weather Service Forecast for: 2 Miles SE Peotone, IL
Issued by: National Weather Service Chicago/Romeoville, IL
Updated: Mon, 03-Oct-2022 2:15pm CDT

Peotone, IL
This Afternoon: Sunny

Tuesday: Sunny

Wednesday: Partly Sunny
Partly Sunny

Thursday: Chance Rain Showers
Chance Rain Showers

Friday: Mostly Sunny
Mostly Sunny

Saturday: Widespread Frost then Sunny
Widespread Frost then Sunny

Sunday: Areas Of Frost then Sunny
Areas Of Frost then Sunny
Hi 69 °F ↓ Hi 72 °F ↓ Hi 75 °F Hi 70 °F Hi 51 °F Hi 55 °F Hi 60 °F  

Tonight: Mostly Clear
Mostly Clear
Tuesday Night: Partly Cloudy
Partly Cloudy
Wednesday Night: Slight Chance Rain Showers
Slight Chance Rain Showers
Thursday Night: Chance Rain Showers then Partly Cloudy
Chance Rain Showers then Partly Cloudy
Friday Night: Mostly Clear then Widespread Frost
Mostly Clear then Widespread Frost
Saturday Night: Mostly Clear then Areas Of Frost
Mostly Clear then Areas Of Frost
Sunday Night: Partly Cloudy
Partly Cloudy
Lo 38 °F Lo 43 °F Lo 52 °F Lo 39 °F Lo 31 °F Lo 33 °F Lo 40 °F  


This Afternoon
Sunny. High near 69, with temperatures falling to around 67 in the afternoon. East northeast wind around 5 mph.
Mostly clear, with a low around 38. East wind 0 to 5 mph.
Sunny. High near 72, with temperatures falling to around 68 in the afternoon. South wind 0 to 5 mph.
Tuesday Night
Partly cloudy, with a low around 43. South southeast wind 0 to 5 mph.
Partly sunny, with a high near 75. South southwest wind 0 to 5 mph, with gusts as high as 15 mph.
Wednesday Night
A slight chance of rain showers after 7pm. Mostly cloudy, with a low around 52. Chance of precipitation is 20%.
A chance of rain showers. Mostly sunny, with a high near 70. Chance of precipitation is 30%.
Thursday Night
A chance of rain showers before 7pm. Partly cloudy, with a low around 39.
Mostly sunny, with a high near 51.
Friday Night
Widespread frost after midnight. Mostly clear, with a low around 31.
Widespread frost before 9am. Sunny, with a high near 55.
Saturday Night
Areas of frost after 1am. Mostly clear, with a low around 33.
Areas of frost before 8am. Sunny, with a high near 60.
Sunday Night
Partly cloudy, with a low around 40.


Forecast from NOAA-NWS for 2 Miles SE Peotone, IL.

FXUS63 KLOT 031940

Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
240 PM CDT Mon Oct 3 2022

Issued at 210 PM CDT Mon Oct 3 2022

Through Tuesday night...

Rinse and repeat with the pleasant fall weather through the short
term, featuring pleasantly warm and dry conditions at peak heating
on Tuesday and seasonably cool to slightly below normal low temps
(especially tonight-early Tuesday). High pressure will stationed
overhead tonight, so another favorable radiational cooling setup
for upper 30s-low 40s outside of Chicago and patchy mid 30s readings.
Can`t rule out some patchy frost and shallow patchy ground fog in
the pre-dawn hours through a bit past sunrise Tuesday.

Strengthening land-lake temperature differential and light winds
in the column will allow the lake breeze to gradually push inland
during the afternoon. Climo of progged 925 mb temps accounting for
the dry soils and full sun supports highs solidly around 70/low
70s inland with a smattering of 74F readings, while the onshore
flow keeps lakeside locations (and a bit inland) in the mid-upper
60s. Increasing southwesterly flow aloft and some high clouds
filtering in from the northwest Tuesday night should keep low
temps a bit above tonight/early Tuesday forecast lows, in the
low-mid 40s outside of Chicago and upper 40s-low 50s in and near
the city.



Issued at 237 PM CDT Mon Oct 3 2022

Wednesday through Monday...

The main focus during the long term portion of the forecast
continues to be on a robust cold front passage Thursday--with
latest model trends hinting at a slightly later arrival--followed
by the threat for widespread frost/freeze conditions Friday
evening and overnight into Saturday morning.

Wednesday will feature increasing high and mid-level cloud cover
through day as a fairly robust shortwave (pinwheeling across
eastern Montana early this afternoon) translates almost directly
overhead. Initial cirrus cloud canopy should be pretty transparent
and think this will allow sufficient insolation to support
temperatures rising to meet the 925 mb climo values in the mid 70s
south of I-80. Cloud cover will thicken with time, however, and
there`s some potential that things saturate low enough to support
a few sprinkles late in the afternoon as fairly robust forcing for
ascent in the form of enhanced upper jet divergence and system-
preceding DCVA occurs. Not enough to put in the forecast right
now, but blended offering of slight chance PoPs for showers into
Wednesday evening looks good.

Attention will then shift to a much more potent PV anomaly which
will be pressing rapidly south of the International border
Thursday morning. This feature will send a sharp cold front
(arctic in origin) sweeping across the Plains and Upper Midwest.
Guidance seems to have trended perhaps a smidge slower with the
arrival of this feature, with the core of low-level cold advection
arriving into our northwest CWA through the early afternoon on
Thursday, and then across our south through the late afternoon and
evening. Given a robust isallobaric response and decreasing low-
level static stability with the arrival of the main CAA push,
think there will be a notable "pop" in the winds as the front
arrives with a brief period where gusts could approach 35 mph.

The depth of the saturated layer with this front looks to be
pretty shallow, so currently not expecting widespread shower
coverage (likely more widely scattered and light in nature). While
the post-frontal subsidence inversion will be characterized by
very warm/dry air above 800 mb, the arrival of below freezing air
at 850 mb atop the mid 60 degree lake will support lake-induced
ELs climbing to around 10 kft with sufficient resultant CAPE to
squeeze out lake effect showers, especially into northwest
Indiana. Potential that the blended offering of 30 percent PoPs
near the lake remain too low given the thermodynamics.

While temperatures will plunge Thursday night behind the front,
winds should remain elevated enough to preclude widespread frost
development. Highs come Friday will struggle to make meaningful
progress into the low 50s. Friday night/Saturday morning continue
to look like the coldest of the bunch as a mid 1030s mb high
builds just to our south. There`s some potential that winds on the
northern periphery of the high stay up just enough to keep the
bottom from really falling out on overnight lows, and have also
noted a subtle trend towards slightly "warmer" solutions in recent
model runs. Still, it looks cold either way, with subfreezing
temperatures likely in our coldest spots. Additional frost is
probable Saturday night/Sunday morning before a gradual
moderation in temperatures takes place into next week with return
flow developing on Sunday.



Issued at 1230 PM CDT Mon Oct 3 2022
For the 18Z TAFs...

Only items of note:

* BCFG/MIFG possible late tonight/early Tuesday outside of Chicago

* Wind shift to ESE late day Tuesday for MDW and possibly ORD

Surface high pressure has continued light and VRB winds through
mid day. Expecting a light east-northeast wind to prevail at ORD,
MDW, and GYY for the balance of this afternoon due to lake influence.
Conditions at the TAF sites will be mostly VFR, though can`t rule
out brief reduced VSBY in BR early Tuesday at outlying airports.
Light southwest winds will probably allow a lake breeze to push
inland Tuesday afternoon, with a 22z wind shift timing indicated
at MDW. ORD may see a shift toward 00z, so no mention in the TAF.





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NWS LOT Office Area Forecast Discussion