Peotone Weather
National Weather Service Forecast for: Peotone, IL
Issued by: National Weather Service Chicago/Romeoville, IL
Updated: Sun, 24-Jun-2018 5:17am CDT

Peotone, IL
 
  Sunday

Sunday: Mostly Sunny
Mostly Sunny
Monday

Monday: Partly Sunny
Partly Sunny
Tuesday

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

Wednesday: Showers And Thunderstorms Likely then Partly Sunny
Showers And T-Storms Likely then Partly Sunny
Thursday

Thursday: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Friday

Friday: Mostly Sunny
Mostly Sunny
Saturday

Saturday: Mostly Sunny
Mostly Sunny
  Hi 84 °F ↓ Hi 81 °F Hi 84 °F Hi 84 °F Hi 88 °F Hi 92 °F Hi 92 °F
 
Overnight

Overnight: Mostly Cloudy
Mostly Cloudy
Sunday
Night
Sunday Night: Partly Cloudy
Partly Cloudy
Monday
Night
Monday Night: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Tuesday
Night
Tuesday Night: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Wednesday
Night
Wednesday Night: Partly Cloudy
Partly Cloudy
Thursday
Night
Thursday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Friday
Night
Friday Night: Mostly Clear
Mostly Clear
 
Lo 65 °F Lo 60 °F Lo 67 °F Lo 69 °F Lo 67 °F Lo 73 °F Lo 74 °F  

 

Overnight
 
Mostly cloudy, with a low around 65. West wind around 5 mph.
Sunday
 
Mostly sunny. High near 84, with temperatures falling to around 81 in the afternoon. Northwest wind 5 to 10 mph.
Sunday Night
 
Partly cloudy, with a low around 60. Northeast wind around 10 mph, with gusts as high as 20 mph.
Monday
 
Partly sunny, with a high near 81. East wind 10 to 15 mph, with gusts as high as 20 mph.
Monday Night
 
Showers and thunderstorms likely after 7pm. Mostly cloudy, with a low around 67. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Tuesday
 
Showers and thunderstorms likely. Mostly cloudy, with a high near 84. Chance of precipitation is 60%.
Tuesday Night
 
Showers and thunderstorms likely. Mostly cloudy, with a low around 69. Chance of precipitation is 70%.
Wednesday
 
Showers and thunderstorms likely before 7am. Partly sunny, with a high near 84.
Wednesday Night
 
Partly cloudy, with a low around 67.
Thursday
 
A slight chance of showers and thunderstorms between 7am and 1pm. Mostly sunny, with a high near 88.
Thursday Night
 
A slight chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 73.
Friday
 
Mostly sunny, with a high near 92.
Friday Night
 
Mostly clear, with a low around 74.
Saturday
 
Mostly sunny, with a high near 92.

 

Forecast from NOAA-NWS for Peotone, IL.

868
FXUS63 KLOT 240801
AFDLOT

Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
301 AM CDT Sun Jun 24 2018

.SHORT TERM...
300 AM CDT

Through tonight...

Nice weather is expected across the area today. Partly cloudy
skies should allow temperatures inland to warm into the lower to
middle 80s with low relative humidity. Onshore winds will result
in cooler conditions into the low 70s near the lake shores.

KJB

&&

.LONG TERM...
300 AM CDT

Monday through Saturday...

The forecast concerns during the extend period first focus on the
increasing threat of a couple rounds of thunderstorms Monday
night into Tuesday morning, then again late Tuesday afternoon
through the evening. During this period, not only will heavy rain
and additional flooding concerns be possible, but it also appears
that severe thunderstorms will be possible with this second round
of thunderstorms late Tuesday into Tuesday evening. The forecast
concern later in the period, namely Thursday into the weekend,
will then focus on the increasing probabilities of a heat wave
impacting the area.

Current attention is focused on the upper trough/low currently
digging across WY, per the latest water vapor imagery channels.
This system is expected to shift out over the central and northern
Plains late tonight into Monday, before moving across the Upper
Midwest and Western Great Lakes Tuesday into early Wednesday. As
this occurs, an attendant weak surface low will drive a warm
front northeastward across the Mid and Upper Mississippi Valley
Monday night into Tuesday. A very warm and humid air mass in the
associated with this boundary will prime the atmosphere for
thunderstorms across our area Monday night through Tuesday night.
As mentioned above, it appears our thunderstorm chances may come
as two rounds. The first late Monday into Monday night, then a
second, potentially more severe round late Tuesday afternoon and
evening.

With extensive convection expected across the Plains later today
and tonight, it appears that a convectively enhanced mid-level
disturbance will be driven northeast (ahead of the main trough
over the Plains) towards the western Great Lakes region late
Monday into Monday evening. This feature may act to drive some
showers and some thunderstorms over portions of the area as early
as Monday afternoon, but it also appears that it will begin to
outrun the instability, so its effects locally are still a bit
uncertain. However, thunderstorms chances will begin to increase
across the area from west to east Monday night, as a southwesterly
low-level jet, and associated theta E advection, kicks up in
response to the approach of the primary upper low over the
Plains. There is still some uncertainty with the extent of storms
over the area Monday night, due to some differences in the models
depiction of the best moisture advection/convergence areas which
will largely act as the focus for the main areas of convection
Monday night. Nevertheless, conditions will be favorable for
storms Monday night and these storms look to be efficient
rainfall producers given precipitable water values expected to be
in excess of 1.7".

While some of the Monday night storms could linger into early
Tuesday, it does appear that there may be a several hour lull in
the thunderstorms on Tuesday. If a quick recovery occurs from the
early day storms, conditions would likely become favorable for a
second round of storms late Tuesday into Tuesday evening as the
aforementioned upper trough/low and the associated mid-level
speed max shifts eastward over WI and northern IL. Falling heights
and cooling temperatures aloft with the approach of this feature
should allow any diurnal capping to quickly erode and
thunderstorms to develop. Currently the mesoscale details of this
second round of storms is a bit uncertain, including how the
morning activity may impact the later day activity. However, the
larger scale pattern certainly points towards an increase threat
of severe thunderstorms into Tuesday evening across northern IL.
Lower 70s surface dewpoints will support ample instability for
storms, and in combination with mid-level flow increasing up
around 50 kt, deep layer will be ample to support severe
thunderstorms. Given the relatively unidirectional profile, its
possible that a complex of storms capable of producing strong
damaging winds could be a possibility over the area. Hail and
possibly a tornado would also be possible, especially associated
with any supercell storm structures. Heavy rain and possible flash
flooding will also be a concern Tuesday evening with these
storms, though a relatively fast storm motion may act to limit the
duration of heavy rain at any given location. The storms look to
move out of the area late Tuesday night or very early Monday
morning.

The next forecast concern later in the period will be the
building heat across the central part of the country mid to late
week. Forecast guidance continues to be in decent agreement with
the general larger scale pattern across the CONUS later in the
week transitioning to a building upper ridge across the central
and eastern CONUS as a trough digs over the western CONUS. While
there could be a few storms late Thursday as the ridge begins to
build over the region, it appears that temperatures will warm well
into the 80s Thursday, with mainly dry conditions and low to mid
90s likely for Friday and Saturday. With dew points likely to be
in the 70s for most areas, dangerous heat indices up to 105 and
possible heat headlines will be possible for at least portions of
the area during this period.

The heat may also extend into Sunday as well, but with the main
upper ridge expected to shift towards the east coast by this time,
we could end up in or near the more active southwesterly flow
aloft on Sunday, which could mean some slightly better chances for
convection and a slightly cooler temperatures, but conditions on
Sunday is of low confidence at this time.

KJB

&&

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

Relatively quiet weather through the latest TAF period as high
pressure builds north of the region. Expect VFR conditions and dry
weather to continue. Light west winds overnight will veer towards
the north-northwest by daybreak. An early afternoon lake breeze
will push across the Chicago area terminals turning winds
northeast around 10-12kt. East to northeast flow should continue
through the remainder of the period.

BMD

&&

.MARINE...
241 AM CDT

Weak low pressure over the eastern Great Lakes will shift away
from the region today while an expansive area of high pressure
builds from Hudson Bay into the western Great Lakes. The gradient
between these features will result in north to northeast winds
today peaking at around 20 kt. Winds will veer to the east then
southeast Monday as the ridge axis shifts to the eastern Great
Lakes. Winds pick up again into the 15 to 25 kt range Monday night
ahead of low pressure lifting into the Upper Midwest. BMD

&&

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

$$

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NWS LOT Office Area Forecast Discussion