Peotone Weather
National Weather Service Forecast for: Peotone, IL
Issued by: National Weather Service Chicago/Romeoville, IL
Updated: Thu, 04-Mar-2021 4:15am CST

Peotone, IL

Thursday: Patchy Fog then Partly Sunny
Patchy Fog then Partly Sunny

Friday: Sunny

Saturday: Sunny

Sunday: Sunny

Monday: Mostly Sunny
Mostly Sunny

Tuesday: Partly Sunny
Partly Sunny

Wednesday: Chance Rain Showers
Chance Rain Showers
  Hi 42 °F ↓ Hi 45 °F Hi 45 °F Hi 55 °F Hi 60 °F Hi 63 °F Hi 63 °F

Overnight: Patchy Fog
Patchy Fog
Thursday Night: Mostly Clear
Mostly Clear
Friday Night: Mostly Clear
Mostly Clear
Saturday Night: Mostly Clear
Mostly Clear
Sunday Night: Partly Cloudy
Partly Cloudy
Monday Night: Partly Cloudy
Partly Cloudy
Tuesday Night: Mostly Cloudy then Chance Rain Showers
Mostly Cloudy then Chance Rain Showers
Lo 26 °F ↑ Lo 22 °F Lo 23 °F Lo 25 °F Lo 37 °F Lo 41 °F Lo 50 °F  


Patchy fog. Mostly cloudy. Low around 26, with temperatures rising to around 30 overnight. Northeast wind around 5 mph.
Patchy fog before 9am. Partly sunny. High near 42, with temperatures falling to around 35 in the afternoon. Northeast wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 22. North northeast wind 5 to 10 mph.
Sunny, with a high near 45. North wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 23. North northwest wind around 5 mph.
Sunny, with a high near 45.
Saturday Night
Mostly clear, with a low around 25.
Sunny, with a high near 55.
Sunday Night
Partly cloudy, with a low around 37.
Mostly sunny, with a high near 60.
Monday Night
Partly cloudy, with a low around 41.
Partly sunny, with a high near 63.
Tuesday Night
A chance of rain showers after midnight. Mostly cloudy, with a low around 50.
A chance of rain showers. Mostly cloudy, with a high near 63.


Forecast from NOAA-NWS for Peotone, IL.

FXUS63 KLOT 040844

Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
244 AM CST Thu Mar 4 2021

243 AM CST

Through Friday...

Hopefully you enjoyed those mid and upper 50s temperatures on
Wednesday (Midway even managed to sneak a 60 in there), with a
reinforcing cold front delivering noticeably cooler temperatures
today which will be some 15 to 20 degrees cooler across northern
Illinois and northwest Indiana. Saturation atop the frontal
inversion is resulting in the development of low stratus which
should continue to push south and westward through daybreak,
mainly near and north of I-80. Ahead of this area of low cloud
cover, clear skies and light winds have allowed dewpoint
depressions to drop with patchy shallow very light fog (freezing
fog) noted in surface observations.

There is some degree of uncertainty regarding cloud trends later
this morning and afternoon. While drier air is noted across east-
central Wisconsin by the lack of a stratus deck, additional lake-
effect clouds are developing to our north and east, with an
additional slug of moisture drifting off of Lake Superior and the
Upper Peninsula of Michigan. The thinking is that this activity
will continue to push southward this morning. While increasing
mixing should begin to help lift and scatter inland clouds, it`s
possible that immediate lakeside locales return to partly sunny
or mostly cloudy conditions after a brief clearing later this
morning. Cloud cover trends should have a big impact on
temperatures today, however, with persistent cold advection
holding highs near the lake in the upper 30s while mid and upper
40s become more prevalent with inland and southward extent into
central Illinois.

A mainly clear sky tonight with high pressure overhead will allow
temperatures to cool readily, at least away from the lake
influence where onshore winds and perhaps some lingering low cloud
cover will hold temperatures up a bit. Patchy fog and freezing
fog will once again be possible given sufficient radiational
cooling, although forecast soundings remain unsupportive of a
widespread dense fog threat.



243 AM CST

Friday night through Wednesday...

There continue to be no major weather concerns this weekend as
high  pressure begins the process of shuttling east of the
region. Temperatures will remain cooler by the lake on Saturday,
and also possibly into Sunday as light southeasterly winds
continue. That said, 925 mb temperature climatology supports mid
and upper 50s inland on Sunday as southerly flow re-develops. The
GFS remains a bit quicker with the low-level mass response ahead
of an initial shortwave, pushing a burgeoning low-level jet
overhead through Sunday afternoon and evening, while the ECMWF,
CMC, and GFSv16 remain a bit slower. The blended wind guidance
handles this generally slower solution well.

This warm southerly/southwesterly low-level flow will continue
into  the middle of next week. By Monday and especially later
Tuesday into Wednesday it looks like we`ll start injecting
appreciably more moisture into the boundary layer as stronger
poleward moisture fluxes develop ahead of the next surface low.
resulting in nocturnal stratus intrusions. As it stands
currently, Wednesday looks like a pretty breezy to windy day as
the combination of a tightening pressure gradient, decent pressure
falls, and mixing of a 50-60+ kt low-level jet materialize
through the day.

At least through Tuesday night, the precipitation potential
appears fairly limited as mid-level moisture looks to remain in
short supply. By Wednesday, however, forecast soundings support
carrying chance PoPs area-wide. Instability profiles look perhaps
a bit less impressive than they did a few days ago, with the
eastern fringes of the EML plume displaced a bit in time with this
disturbance. Have continued to just advertise showers as a
result, but there may be a window with the cold frontal passage
supportive of some brief thunderstorm chances later Wednesday and
moreso into Wednesday evening.

Much colder air sweeps in on the wings of breezy northwesterly
winds into Thursday. At this time, it looks like we`ll scour the
low-levels of moisture quickly enough to end precipitation
chances before the column cools too much, but there has been a
signal for perhaps some non-zero snow chances with this--mainly
just to our north.



For the 06Z TAFs...

Forecast concerns include...

Mvfr cigs overnight/Thursday morning.
Possible fog overnight/Thursday morning, mainly northwest IL.

An area of low mvfr cigs continues to expand across eastern WI and
central Lake Michigan. Guidance shows this cloud cover expanding/
moving southwest across the terminals during the overnight hours
and then continuing into Thursday morning. Introduced scattered
mention at 06z but cigs may develop a bit sooner and trends will
need to be monitored. These lower cigs are expected to lift and
scatter late Thursday morning into early Thursday afternoon. A mid
sct/bkn mid level deck will also move across the area overnight.

There has been some light fog near Lake Michigan in southeast WI
and now across northwest IN. This is likely going to be short
lived but confidence is low and some tempo mention may be needed,
especially for gyy. Guidance has been slowly backing away from fog
across northwest IL. Confidence is low for fog potential here, but
the potential remains so for now have only adjusted timing at rfd.

Winds will remain northeast through the period, increasing back to
10kts on Thursday. cms


LM...Small Craft Advisory...LMZ740-LMZ741-LMZ742-LMZ743-LMZ744-
     LMZ745...6 AM Thursday to 9 AM Friday.



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NWS LOT Office Area Forecast Discussion