Peotone Weather
National Weather Service Forecast for: Peotone, IL
Issued by: National Weather Service Chicago/Romeoville, IL
Updated: Tue, 21-Aug-2018 12:17am CDT

Peotone, IL
 
This
Afternoon
This Afternoon: Chance Rain Showers
Chance Rain Showers
Wednesday

Wednesday: Sunny
Sunny
Thursday

Thursday: Sunny
Sunny
Friday

Friday: Slight Chance Rain Showers then Chance Showers And Thunderstorms
Slight Chance Rain Showers then Chance Showers And T-Storms
Saturday

Saturday: Chance Showers And Thunderstorms then Mostly Sunny
Chance Showers And T-Storms then Mostly Sunny
Sunday

Sunday: Sunny
Sunny
Monday

Monday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
 
Hi 77 °F Hi 75 °F Hi 78 °F Hi 76 °F Hi 85 °F Hi 90 °F Hi 87 °F  
 
Tonight

Tonight: Slight Chance Rain Showers
Slight Chance Rain Showers
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Friday
Night
Friday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Saturday
Night
Saturday Night: Partly Cloudy
Partly Cloudy
Sunday
Night
Sunday Night: Partly Cloudy then Slight Chance Showers And Thunderstorms
Partly Cloudy then Slight Chance Showers And T-Storms
Monday
Night
Monday Night: Slight Chance Showers And Thunderstorms then Partly Cloudy
Slight Chance Showers And T-Storms then Partly Cloudy
 
Lo 57 °F ↑ Lo 55 °F Lo 58 °F Lo 64 °F Lo 70 °F Lo 70 °F Lo 72 °F  

 

This Afternoon
 
A chance of rain showers. Partly sunny, with a high near 77. North wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Tonight
 
A slight chance of rain showers before 1am. Mostly cloudy. Low around 57, with temperatures rising to around 59 overnight. North northwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Wednesday
 
Sunny, with a high near 75. North northwest wind around 10 mph.
Wednesday Night
 
Mostly clear, with a low around 55. West northwest wind around 5 mph.
Thursday
 
Sunny, with a high near 78. West southwest wind around 5 mph.
Thursday Night
 
Mostly clear, with a low around 58.
Friday
 
A slight chance of rain showers between 7am and 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 76. Chance of precipitation is 30%.
Friday Night
 
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Saturday
 
A chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 85.
Saturday Night
 
Partly cloudy, with a low around 70.
Sunday
 
Sunny, with a high near 90.
Sunday Night
 
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70.
Monday
 
A chance of showers and thunderstorms. Mostly sunny, with a high near 87.
Monday Night
 
A slight chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 72.

 

Forecast from NOAA-NWS for Peotone, IL.

135
FXUS63 KLOT 211937
AFDLOT

Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
237 PM CDT Tue Aug 21 2018

.SHORT TERM...
212 PM CDT

Through Wednesday...

Isolated showers will remain possible across the area this
afternoon. However, a bit better shot at showers and even some
lake induced thunderstorms will be possible this evening,
especially over northeastern IL through portions of northwestern
Indiana. Another upper-level disturbance is forecast to shift over
the area this evening, and the associated speed max will place
the area in the left exit region of a 110+ kt upper-level jet.
With this good synoptic signal and many convective allowing
models developing showers and storms over southern Lake Michigan
and adjacent areas of northeastern IL and northwestern IN this
evening, I have continued with the going forecast for a period of
higher POPs this evening. Instability looks to be augmented by
the lake, with lake induced CAPE values expected to top 1,500
J/KG. Waterspouts will be possible over the lake, but otherwise,
heavy downpours will be the primary threat from this activity this
evening. Expect the showers and storms to wane across the area
overnight.

Wednesday should be a dry and seasonably cool day, with highs
expected to reach the upper 70s under mostly sunny skies.

KJB

&&

.LONG TERM...
228 PM CDT

Wednesday night through Tuesday...

After a day of low humidity and plentiful sunshine Thursday,
another upper trough will eject from the Great Basin toward the
Great Lakes late in the week and result in a few periods of
unsettled weather. A warm front ahead of this trough will lead to
a period of showers and embedded thunderstorms late Thursday
night into Friday morning. Warm sector moisture will build ahead
of the main trough axis later Friday and Friday night such that
another round of thunderstorms appear on tap. Heavy rainfall
appears to be the main hazard with these, though there is some
stronger storm potential, more so for areas west, given the
increased moisture and strong wind fields, and decent veering in
the low to mid level wind fields also.

Once the trough clears the area later Saturday, the upper air
pattern will feature a building ridge across the southern/southeastern
United States with a trough across the northwest. This pattern
will result in broad and deep warm and moist southwesterly flow
across the eastern USA, including the Midwest.

The lower Great Lakes region will remain precariously close to the
ring of fire that often develops on the northern periphery of the
ridge axis, which at this juncture appears to be the case for
areas slightly to our north in this pattern, but we could be in
the crosshairs at times also. This pattern appears like it could
remain in place for much of next week. What can be said with
decent confidence is that we will likely be in for an extended
period of above to well above normal temperatures and seasonally
high humidity values. But there may be times when the effective
warm front gets shoved south over our region, and we get mired in
the active pattern that often features periods of heavy rainfall
and gusty thunderstorms. Some guidance hints at the start of the
ridge development and then again mid week. Did continue the idea
of temperatures above guidance, but if the ridge does hold we may
still be a tad conservative.

KMD

&&

.AVIATION...
For the 18Z TAFs...

CIGs continue to gradually improve early this afternoon. Expect
some higher end MVFR to lower end VFR CIGs to continue for the
next few hours, with some additional improvement likely by mid to
late this afternoon. Showers will continue to be possible at times
this afternoon over the terminals. However, the main focus has
been along the surface frontal boundary which is now sagging
towards the I-80 corridor. Another upper disturbance will move
across northeastern IL into early this evening and this could
result in some more scattered showers and perhaps a thunderstorm
over the eastern terminal sites. Otherwise, expect winds to be
gusty out of the north-northeast this afternoon.

KJB

&&

.MARINE...
228 PM CDT

Seasonally strong winds to 30 kt on the back side of
low pressure across the eastern Great Lakes will gradually ease
over the next 36 hours, but until then waves will remain elevated
across Lake Michigan with the highest waves across the south due
to full fetch northerly winds. A secondary cold front tonight will
keep winds elevated until early Wednesday before high pressure
begins to nose in from the west.

The high center will pass south of the lake tonight before it
continues to the Atlantic seaboard Friday. Another low will eject
from the northern Rockies and approach northern Lake Michigan
early this weekend resulting in a shift to gusty southerly winds,
again to around 30 kt or so.

KMD

&&

.LOT WATCHES/WARNINGS/ADVISORIES...
IL...Beach Hazards Statement...ILZ006-ILZ014 until 1 PM Wednesday.

IN...Beach Hazards Statement...INZ001-INZ002 until 7 PM Wednesday.

LM...Small Craft Advisory...IL nearshore waters until 11 AM
     Wednesday.

     Small Craft Advisory...IN nearshore waters until 7 PM Wednesday.

&&

$$

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NWS LOT Office Area Forecast Discussion