Peotone Weather

National Weather Service Forecast for: 2 Miles SE Peotone, IL Issued by: National Weather Service Chicago/Romeoville, IL

Updated: Wed, 28-Sep-2022 1:15pm CDT

- Select Forecast - Peotone, IL Manteno, IL Beecher, IL Monee, IL Kankakee, IL Willmington, IL Braidwood, IL Manhattan, IL OakForest, IL Stelle, IL Ottawa, IL Amboy, IL Byron, IL Rockford, IL Quad Cities, IL Champaign/Urbana, IL Peoria, IL Bloomington, IL Springfield, IL Carbondale, IL Vienna, IL Culver, IN

Peotone, IL

This Afternoon Mostly Sunny Thursday Sunny Friday Sunny Saturday Sunny Sunday Mostly Sunny Monday Sunny Tuesday Mostly Sunny   Hi 59 °F Hi 64 °F ↓ Hi 67 °F Hi 71 °F Hi 69 °F Hi 68 °F Hi 69 °F     Tonight Partly Cloudy Thursday Night Mostly Clear Friday Night Clear Saturday Night Partly Cloudy Sunday Night Partly Cloudy Monday Night Partly Cloudy Tuesday Night Partly Cloudy   Lo 39 °F Lo 41 °F Lo 44 °F Lo 49 °F Lo 48 °F Lo 47 °F Lo 47 °F

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

000
FXUS63 KLOT 281750
AFDLOT

Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
1250 PM CDT Wed Sep 28 2022

.SHORT TERM...
Issued at 344 AM CDT Wed Sep 28 2022

Through Thursday...

No changes to going frost/beach hazard headlines this morning.

Early morning GOES water vapor imagery indicates a mid-level
short wave digging south-southeast across the area, with RAP
mesoanalysis indicating seasonably cold 850 mb temps of 0 to +1C
across southern Lake Michigan. Beneath this colder air aloft,
observed marine boundary layer temps over the lake in the low-mid
50s (and lake water surface temps in the low-mid 60s) were
supporting convective instability and resulting in lake-effect
rain showers over southern Lake Michigan. The low-level
convergence zone was readily evident in both metar and radar data,
generally from the south mid-lake buoy (45007) southward into
Lake and Porter counties in northwest IN. This area (along with
the immediate Cook county shore and the IL/IN state line region)
will continue to be the focus for showers today, with the greatest
coverage and intensity expected this morning. Should see a
decrease in coverage and intensity of showers from late morning
into the afternoon hours, as the short wave trough exits and the
larger scale long-wave trough axis begins to shift east of the
area. Associated mid-level height rises indicative of developing
deep layered subsidence will result in sharply lowering inversion
heights through the afternoon, limiting the depth of the weakening
convective updrafts. Surface high pressure spreading into the
upper Midwest will also gradually weaken the surface pressure
gradient, diminishing winds and weakening convergence over the
lake. No lightning has been detected with current activity
overnight, though an isolated thunderstorms waterspouts remain
possible early this morning when inversion/equilibrium levels will
be at their peak. Current gusty north winds in the 25-30 kt range
continue to produce high waves and dangerous currents for Lake
Michigan beaches, and these hazards will continue this morning
before gradually easing with diminishing winds later today/this
evening.

Away from the lake this morning, clear to partly cloudy skies
were in place across much of northern IL, while lake-effect clouds
extended inland across much of our northwest IN counties. While a
few spots may dip into the mid-30s west of Chicago (KARR did dip
briefly to 36 degrees), north-northwest winds of 5-10 mph have
been enough to keep most areas from dropping much below 40. May
see a few mid-upper 30s prior to sunrise, and perhaps some patchy
frost. Will maintain current frost advisory across western
counties early this morning, though frost will likely be limited.
Surface high pressure settles across WI/MI tonight, which will
likely provide better conditions for more widespread frost,
especially across north central IL. Areas near Lake Michigan will
likely see light onshore winds, which may maintain some shallow,
patchy lake-effect clouds and temps in the low-mid 40s limiting
frost potential there. Sunny skies will be the rule Thursday, with
temps in the low to mid 60s in most areas with light east-
southeast winds.

Ratzer

&&

.LONG TERM...
Issued at 238 AM CDT Wed Sep 28 2022

Thursday night through Tuesday...

There are no weather impact concerns, other than one more night of
(very) patchy frost in favored cool spots late Thursday night into
Friday morning. A prolonged stretch of fair and dry weather with
seasonably mild temperatures will persist through at least day 7
(Tuesday). Expansive high pressure will remain in control through
the period, resulting in comfortably cool overnights (40s inland)
following the unseasonably chilly overnights this week.

The mid and upper pattern will feature upper level low pressure
meandering across the northern Rockies while the remnant closed
low of Ian decays over the interior southeast. In between will be
a mid-level ridge, resulting in the warmer daytime temps into the
weekend, peaking in the low-mid 70s on Saturday. Some model
guidance is indicating a short-wave trough on the east side of the
aforementioned ridging on Sunday, which may bring a modest cool
down at the start of next work week to the mid-upper 60s if it
comes to fruition (after a non-zero chance for spotty light
rain/sprinkles Sunday evening). With continued dry high pressure
and no signs of a more active jet stream pattern on medium range
operational and ensemble guidance, there`s little hope for
meaningful rain through mid next week. In fact, the longer range
ensemble guidance does not appear favorable for a change to better
rain chances until perhaps mid October.

Castro

&&

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

NNE winds around 10 knots will persist into this evening before
becoming VRB under 5 knots overnight into Thursday morning. Winds
will then settle E/ESE 5-10 knots for most of Thursday.

Diurnal cumulus enhanced by moisture off Lake Michigan should
remain low-end VFR this afternoon. High-end MVFR lake effect
clouds will then gradually shift westward over ORD/MDW overnight
through much of Thursday morning. A few sprinkles are possible
with these clouds, but dry conditions are expected.

Kluber

&&

.LOT WATCHES/WARNINGS/ADVISORIES...
IL...Beach Hazards Statement...ILZ006-ILZ103-ILZ104 until 10 PM
     Wednesday.

IN...Beach Hazards Statement...INZ001-INZ002 until 10 PM Wednesday.

LM...Small Craft Advisory...nearshore waters until 10 PM Wednesday.

&&

$$

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