Peotone Weather
National Weather Service Forecast for: 2 Miles SE Peotone, IL
Issued by: National Weather Service Chicago/Romeoville, IL
Updated: Mon, 27-May-2024 3:41am CDT

Peotone, IL
 
  Memorial
Day
Memorial Day: Partly Sunny
Partly Sunny
Tuesday

Tuesday: Mostly Sunny then Showers And Thunderstorms Likely
Mostly Sunny then Showers And T-Storms Likely
Wednesday

Wednesday: Sunny
Sunny
Thursday

Thursday: Sunny
Sunny
Friday

Friday: Sunny
Sunny
Saturday

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

Sunday: Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
Chance Showers And T-Storms then Slight Chance Showers And T-Storms
  Hi 72 °F Hi 71 °F Hi 67 °F Hi 70 °F Hi 77 °F Hi 79 °F Hi 81 °F
 
Overnight

Overnight: Mostly Cloudy
Mostly Cloudy
Monday
Night
Monday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Tuesday
Night
Tuesday Night: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Friday
Night
Friday Night: Partly Cloudy then Slight Chance Rain Showers
Partly Cloudy then Slight Chance Rain Showers
Saturday
Night
Saturday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
 
Lo 57 °F Lo 54 °F Lo 50 °F Lo 44 °F Lo 45 °F Lo 53 °F Lo 58 °F  

 

Overnight
 
Mostly cloudy, with a low around 57. West wind around 15 mph, with gusts as high as 25 mph.
Memorial Day
 
Partly sunny, with a high near 72. West northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Monday Night
 
A chance of showers and thunderstorms before 10pm, then a chance of showers and thunderstorms between 10pm and 1am. Partly cloudy, with a low around 54. West northwest wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Tuesday
 
Showers and thunderstorms likely after 1pm. Mostly sunny, with a high near 71. West northwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Tuesday Night
 
Showers and thunderstorms likely before 1am. Partly cloudy, with a low around 50. Northwest wind 5 to 15 mph. Chance of precipitation is 60%.
Wednesday
 
Sunny, with a high near 67.
Wednesday Night
 
Mostly clear, with a low around 44.
Thursday
 
Sunny, with a high near 70.
Thursday Night
 
Mostly clear, with a low around 45.
Friday
 
Sunny, with a high near 77.
Friday Night
 
A slight chance of rain showers after 1am. Partly cloudy, with a low around 53.
Saturday
 
A slight chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 79.
Saturday Night
 
A chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 58.
Sunday
 
A chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 81.

 

Forecast from NOAA-NWS for 2 Miles SE Peotone, IL.

334
FXUS63 KLOT 270748
AFDLOT

Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
248 AM CDT Mon May 27 2024

.KEY MESSAGES...

- Threat for a few strong to locally damaging wind gusts with
  scattered thunderstorms tomorrow afternoon, after about 3 PM.

- Additional showers and thunderstorms Tuesday afternoon.


&&

.DISCUSSION...
Issued at 248 AM CDT Mon May 27 2024

Through Tuesday:

A cold front is making its way out of the CWA early this morning
shunting all of the precip off to our east. Cool air advecting
in behind the front is spreading a low stratus deck across the
area with even a few instances of light fog being reported,
mostly up in southern WI so far through 2 AM. The low clouds
will likely hang around well into the morning before burning
off, but additional mid level clouds will fill in during the
afternoon. The cloudiness and cold advection will keep
conditions just a bit cooler today with highs forecast in the
lower to middle 70s. A tight pressure gradient behind the
departing storm system will also bring breezy conditions to the
area today.

During the day today, a low amplitude mid level vort max will
dive from the northern Plains southeastward into the Midwest.
Low level lapse rates are anticipated to steepen up with diurnal
heating through the afternoon while mid level cooling will
steepen up lapse rates upstairs a bit. The result will be a
cluster of southeastward-moving showers and thunderstorms
expected to develop today ahead of the vort max and move across
the CWA during the latter part of the afternoon through about
mid-evening. With CAPE and shear both on the awfully marginal
side when considering severe potential, most thunderstorms are
expected to be sub-severe. However, steep low level lapse rates
with a modest boundary layer hydrolapse could be enough to
produce strong, if not marginally severe, thunderstorm winds.
Models are really favoring the southwestern half of the CWA to
see the strongest storms, following a distinct corridor of
maximized PVA. However, the strong wind threat should wane with
southeastward extent as low level stability builds into the
evening. Instability should fizzle away by the latter part of
the evening, though a few showers may linger past midnight.

Behind the departing trough, a second wave will follow closely
behind and will impact the region on Tuesday with another vort
max diving into northern Illinois during the day. As a result,
another swath of scattered showers and storms is expected to
move across the CWA during the afternoon. Guidance is unsure how
much instability will build through the day with models ranging
from no more than ~500 joules of MUCAPE to over 1,500. Models
hone in on the Chicago metro as having the highest instability
in any case being nearer to the cold core of the passing wave.
Understandably, this is also where most are resolving the
deeper convection. The signal appeared strong enough to warrant
introducing a swath of likely PoPs through the metro during the
afternoon. Weak cloud-layer shear should keep storms from
organizing all too well, but the possibility of higher CAPE
values keeps the potential for a stronger storm or two on the
table. Didn`t think the potential was quite high enough to
justify coordinating an outlook for severe weather in this
morning`s Day 2, but this is something that we`ll continue to
monitor closely. Instability looks to give out early in the
evening which should do away with the thunder potential by
around sundown, though a few showers may persist through the
evening.

Doom


Tuesday Night through Sunday:

The mid/upper-level ridge axis centered across the Rockies early
this week will build eastward across the Midwest into the western
Great Lakes for the second half of the week. As it does so, the
active belt of enhanced northwesterly flow aloft across the Great
Lakes region in the near term will get shunted east of our area.
This will set the stage for a few day period of dry and quieter
weather through the end of the week as surface high pressure sets
up shop over the Great Lakes region.

While the weather will be quieting down by mid-week, below
average temperatures will persist into Thursday before conditions
begin to moderate back above normal for the weekend. Therefore,
expect high temperatures for Wednesday and Thursday to only be in
the 60s to low 70s (coolest lakeside). Overnight low temperatures
also look to get downright chilly for the end of May, with
readings likely to drop into the mid 40s outside of urban areas.
Temperatures then will warm back to around 80 degree highs for the
upcoming weekend.

Unfortunately, with the warming temperatures, comes increasing
chances for showers and thunderstorms. It appears the area will
gradually transition back into a more active weather pattern
sometime this weekend into early next week. Accordingly, our
current forecast is carrying some low end chances (20-30%) for
showers and storms for the weekend. However, it is worth noting
that there is a considerable amount of ensemble spread with how
quickly this transition will occur. For this reason, the chances
currently highlighted in the forecast are likely to broad-brushed
and hence will need refinement as forecast certainty grows.

KJB

&&

.AVIATION /06Z TAFS THROUGH 12Z TUESDAY/...
Issued at 1256 AM CDT Mon May 27 2024

Main forecast messages/concerns:

- Deck of low MVFR (possibly even briefly IFR) stratus expected
  through the mid morning hours.

- Another threat for late afternoon and evening thunderstorms.

A deck of low MVFR stratus (bases of 1,000 to 1,500 ft AGL)
continues to shift over the main Chicago area terminals along
the southwestern periphery of the surface low shifting across
central Lake Michigan. Expect this low status deck to persist
overnight before a gradual diurnal improvement back to low end
VFR occurs later this morning into the midday period.

Another weather disturbance is expected to track southeastward
from the Upper Midwest into our area this evening. This feature
is expected to foster another round of scattered showers and
thunderstorms later today as the airmass destabilizes through
the afternoon. While confidence is high with their occurrence
across the area, the coverage is expected to remain more widely
scattered in nature. For this reason, I have opted to continue
the PROB30 mention for them at each terminal. The only change to
the going PROB30 was to shift the favored timing slightly to
account for them potentially persisting a bit more into this
evening as the main impulse arrives. Locally strong gusty winds
may accompany the stronger storms.

Otherwise, west-northwesterly winds will persist through the
period as surface low pressure tracks northeastward across the
Upper Great Lakes.


KJB

&&

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

&&

$$

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