Peotone Weather
National Weather Service Forecast for: Peotone, IL
Issued by: National Weather Service Chicago/Romeoville, IL
Updated: Sun, 21-Jul-2019 3:16am CDT

Peotone, IL
 
  Sunday

Sunday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Monday

Monday: Slight Chance Rain Showers
Slight Chance Rain Showers
Tuesday

Tuesday: Sunny
Sunny
Wednesday

Wednesday: Sunny
Sunny
Thursday

Thursday: Sunny
Sunny
Friday

Friday: Mostly Sunny
Mostly Sunny
Saturday

Saturday: Mostly Sunny then Slight Chance Showers And Thunderstorms
Mostly Sunny then Slight Chance Showers And T-Storms
  Hi 82 °F ↓ Hi 76 °F Hi 80 °F Hi 82 °F Hi 84 °F Hi 85 °F Hi 87 °F
 
Overnight

Overnight: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Sunday
Night
Sunday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Monday
Night
Monday Night: Mostly Clear
Mostly Clear
Tuesday
Night
Tuesday Night: Mostly Clear
Mostly Clear
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Friday
Night
Friday Night: Partly Cloudy
Partly Cloudy
 
Lo 73 °F Lo 65 °F Lo 57 °F Lo 60 °F Lo 59 °F Lo 63 °F Lo 65 °F  

 

Overnight
 
A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. West southwest wind 5 to 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Sunday
 
A chance of showers and thunderstorms. Mostly cloudy. High near 82, with temperatures falling to around 80 in the afternoon. North wind 5 to 10 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
 
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. North northeast wind around 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Monday
 
A slight chance of rain showers before 1pm. Partly sunny, with a high near 76. North northeast wind around 15 mph. Chance of precipitation is 20%.
Monday Night
 
Mostly clear, with a low around 57. North northwest wind 5 to 10 mph.
Tuesday
 
Sunny, with a high near 80.
Tuesday Night
 
Mostly clear, with a low around 60.
Wednesday
 
Sunny, with a high near 82.
Wednesday Night
 
Mostly clear, with a low around 59.
Thursday
 
Sunny, with a high near 84.
Thursday Night
 
Mostly clear, with a low around 63.
Friday
 
Mostly sunny, with a high near 85.
Friday Night
 
Partly cloudy, with a low around 65.
Saturday
 
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87.

 

Forecast from NOAA-NWS for Peotone, IL.

000
FXUS63 KLOT 210558
AFDLOT

Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
1258 AM CDT Sun Jul 21 2019

.SHORT TERM...
319 PM CDT

Through Sunday night...

We will be able to drop some counties from the heat warning
within the next hour or so as the outflow boundary continues to
progress southward into northern IL. Expect gusty northerly winds
in the wake of the boundary along with much cooler temperatures.

South of the approaching outflow we have temperatures in the low
to mid 90s atop mid to upper 70s dewpoints. While 700 mb
temperatures are also very warm at around 14C, it appears that
area is not capped all that strongly, per some AMDAR soundings out
of MDW. For this reason, it appears likely that scattered
thunderstorms will continue to develop with the arrival of the
outflow boundary as it pushes southward into northern IL through
the late afternoon hours. This also appears likely as the
west-east orientation of the outflow boundary along with the
gusty southwesterly prefrontal winds will continue to favor some
decent low-level convergence. There remains concerns for some
severe storms as well, though confidence with severe storms
remains on the lower side. Isolated damaging winds would be the
primary threats with any strong storms that collapse.

Expect the storms to wane for a period early this evening, before
additional storms develop over the area later this evening and
overnight. It appears that these elevated storms will develop in
association with the elevated frontal boundary. These storms will
be capable of producing very heavy rainfall, and with easterly
storm motions we could have some training of cells over portions
of the area tonight. This does cause concern for flash flooding
as storms could easily produce 2+ inches per hour. We thought
about issuing a flash flood watch for northern IL, but due to
some lower confidence on the overall convective setup over
northern IL we will hold off. A short fused watch could need to be
issued this evening, however, if conditions continue to point
towards this possibility.

Otherwise, some lingering storms will be around on Sunday morning,
but the main focus will shift over my southern CWA for convection.
Some strong storms will be possible in this area on Sunday, as the
surface frontal boundary remain gradually sags into central IL
Sunday. Areas north will be drying out, and temperatures will be
much cooler, especially near the lake.

KJB

&&

.LONG TERM...
319 PM CDT

Tuesday through Friday...

Nothing has changed with the long term forecast thinking below.

A period of quiet, dry conditions is expected for the long term
forecast period.  A large, sprawling area of surface high pressure
is expected to spread through the Northern and Central Plains and
across the Upper Mississippi Valley to the Great Lakes region.  In
the upper levels, a high amplitude long wave pattern, with little
progression, will set up, with a broad ridging centered over the
continental Divide and a broad trough over the ern CONUS. The local
area will be under nwly flow aloft through the period. The center of
the surface high is expected to slowly slide south and east and
should be centered over IL/IN by Wednesday night and Thursday. The
center of the sfc high is expected to shift to the Mid atlantic
region by Friday. After a relatively cool Monday, temperatures
should begin to moderate back into the mid to upper 80s by mid week.
The next chance for pcpn may not be until next Saturday when some
of the long range models are suggesting a cold front may push
through the area.

&&

.AVIATION...
For the 06Z TAFs...

Main forecast concern is thunderstorm chances overnight and into
the morning hours.

Trends radar trends indicate scattered showers and isolated
thunderstorms developing over northern Illinois, slightly lagging
a cold front that is moving through the Chicago area terminals.
winds are shifting to nnely with the frontal passage and expect
that winds will continue to veer to nely as the line of pcpn moves
through the terminals. Have slightly pushed back the timing of
pcpn at the terminals based on latest radar trends. Also, latest
guidance is a little more bullish on ifr cigs developing in the
wake of the main area of pcpn as some cooler air moves into a very
moist air mass. So, have added a tempo for ifr cigs given some
uncertainty to the extent and duration of any ifr cigs should they
develop.

Expect that winds will remain nely-nnely through the day, but
increasing by late afternoon or early evening as the pressure
gradient and cold advection strengthen across the western Great
lakes and Upper Midwest with strong high pressure building into
the Northern Plains.

&&

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

$$

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NWS LOT Office Area Forecast Discussion