Peotone Weather
National Weather Service Forecast for: Peotone, IL
Issued by: National Weather Service Chicago/Romeoville, IL
Updated: Sat, 18-Aug-2018 9:16pm CDT

Peotone, IL

Sunday: Patchy Fog then Mostly Sunny
Patchy Fog then Mostly Sunny

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

Tuesday: Showers And Thunderstorms Likely
Showers And T-Storms Likely

Wednesday: Sunny

Thursday: Sunny

Friday: Sunny

Saturday: Mostly Sunny
Mostly Sunny
  Hi 84 °F Hi 80 °F Hi 77 °F Hi 77 °F Hi 79 °F Hi 80 °F Hi 82 °F

Tonight: Partly Cloudy then Patchy Fog
Partly Cloudy then Patchy Fog
Sunday Night: Partly Cloudy
Partly Cloudy
Monday Night: Showers And Thunderstorms
Showers And T-Storms
Tuesday Night: Slight Chance Rain Showers then Partly Cloudy
Slight Chance Rain Showers then Partly Cloudy
Wednesday Night: Mostly Clear
Mostly Clear
Thursday Night: Mostly Clear
Mostly Clear
Friday Night: Partly Cloudy
Partly Cloudy
Lo 64 °F Lo 65 °F Lo 66 °F Lo 57 °F Lo 55 °F Lo 58 °F Lo 60 °F  


Patchy fog after 4am. Partly cloudy, with a low around 64. North northeast wind 0 to 5 mph.
Patchy fog before 9am. Mostly sunny, with a high near 84. East wind 0 to 5 mph.
Sunday Night
Partly cloudy, with a low around 65. East wind around 5 mph.
A chance of showers and thunderstorms between 7am and 1pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 80. Southeast wind around 10 mph. Chance of precipitation is 70%.
Monday Night
Showers and thunderstorms. Cloudy, with a low around 66. South wind 5 to 10 mph. Chance of precipitation is 80%.
Showers and thunderstorms likely. Mostly cloudy, with a high near 77. Chance of precipitation is 70%.
Tuesday Night
A slight chance of rain showers before 7pm. Partly cloudy, with a low around 57. Chance of precipitation is 20%.
Sunny, with a high near 77.
Wednesday Night
Mostly clear, with a low around 55.
Sunny, with a high near 79.
Thursday Night
Mostly clear, with a low around 58.
Sunny, with a high near 80.
Friday Night
Partly cloudy, with a low around 60.
Mostly sunny, with a high near 82.


Forecast from NOAA-NWS for Peotone, IL.

FXUS63 KLOT 182330

Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
630 PM CDT Sat Aug 18 2018

100 PM CDT

Through tonight...

Fairly quiet conditions will remain in place through tonight. A steady
stream of lower level clouds will continue this afternoon as
northeast winds of 10 to 15 mph hold. Wave will remain elevated in
the 3 to 4 foot range near the shore. There is still a low chance
of an isolated shower or storm well south later this afternoon.

Surface ridge axis will move through tonight and will result in
light winds and continued relatively moist levels suggest another
round of fog late tonight into early Sunday. Vis could dip to a
mile or so in spots, with locally dense conditions again possible,
especially for outlying areas.



305 PM CDT

Sunday through Saturday...

By Sunday morning, a broad ridge of sfc high pressure will extend
Quebec through the Middle Mississippi Valley.  The morning should
start our with some sct fog with lgt/vrbl winds and moderate low
level moisture in place.  However, under ample sunshine and a
building upper level ridge, expect that and lingering fog should
burn of relatively quickly.  The building upper ridge and ample
sunshine should allow temperatures to reach the middle 80s across
much of the region.  Once again, the immediate lakefront will remain
a bit cooler as the weak gradient allows a lake breeze to push
inland, limiting locations along the lake to the upper 70s.

The next significant chance for pcpn will come by early Monday as a
nrn stream shortwave dropping out of the nrn plains phases with a
srn stream shortwave lifting out of the south high plains.  The
longer range model guidance is trending toward a relatively
consistent solution, both temporally and spatially, with sfc low
center over nwrn MO by Monday morning.  The low is expected to lift
across Lower Michigan through the day on Tuesday.  With a persistent
fetch of deep layer moisture from the Gulf of Mexico and a
relatively slow movement to the system, widespread moderate to
occasionally heavy rain is likely with the system.  The models are
advertising pwats at or slightly higher than 2 inches in advance of
the system as well as in the wraparound fetch of moisture on the
western periphery of the system as it lifts northeast away from the
area.  Pwats of this magnitude are in excess of 2 standard
deviations above normal and approaching the 99th percentile per the
DVN sounding pwat climatology.  While it is still a bit early to
discuss storm total pcpn with much confidence, if the system plays
out as the model guidance is currently suggesting, there is chance
for widespread moderate to occasionally rainfall, with scattered,
embedded thunderstorms.  There may be the potential for flooding or
flash flooding and the area is highlighted in the WPC Day 3
Excessive Rainfall Outlook.

The next concern as the low lifts northeast away from the area and
strong high pressure builds into the northern and central plains,
strong northwest to north winds will set up over the Upper Midwest
and the western Great Lakes.  The strong winds over lake Michigan
will likely lead to waves high enough at Lake Michigan Beaches which
would produce dangerous rip currents and present hazardous swimming

For Wednesday through Saturday, high pressure will slowly move
across the region.  This should bringing dry conditions with
temperatures gradually increasing, with highs in the middle 70s
on Wednesday to the low 80s by Saturday.


For the 00Z TAFs...

630 pm...Primary forecast concern is fog overnight into Sunday

Fog is expected to develop late this evening and overnight and
continue into Sunday morning. Guidance is in reasonable agreement
focusing fog southwest of ord/mdw into central IL. Best chance for
vis 1sm or less will likely be at dpa and possibly rfd. Current
tempo fog mention seems to have the potential handled well from
this distance. Some dense fog will be possible south of the

There are a few small showers near rfd and also well south of the
terminals in eastern IL and western Indiana. These are expected to
dissipate with sunset. A few isolated showers are possible again
Sunday afternoon...possibly along the lake breeze. Confidence is
too low to include any mention with this forecast.

Northeast winds will slowly diminish to light northerly this
evening. Winds are expected to become calm/variable outside the
metro area and then turn easterly mid/late Sunday morning. cms


305 PM CDT

North winds of 10 to 20 knots will diminish and veer to
northeasterly overnight as high pressure builds across the western
Great Lakes.  As the ridge continues to build south and east, winds
will veer to easterly Sunday and then southeasterly as an u
unseasonably strong low pressure system tracks from the central Great
Plains Sunday night to southeast Ontario Tuesday night, crossing far
southern Lake Michigan early Tuesday morning. Southeast winds to
around 20 knots across the south half of the lake Monday and Monday
night will transition to northwest to west winds to 30 knots Tuesday
and Tuesday night.  Occasionally gale force winds are possible with
this system.  The NW winds will diminish Wednesday night and
Thursday as high pressure builds in from the west.






NWS LOT Office Area Forecast Discussion