Peotone Weather
National Weather Service Forecast for: Peotone IL
Issued by: National Weather Service Chicago, IL
Updated: 4:16 pm CST Feb 16, 2019

Peotone, IL
 
Tonight

Tonight: Snow likely, mainly after 5am.  Mostly cloudy, with a low around 24. East wind around 10 mph, with gusts as high as 15 mph.  Chance of precipitation is 60%. Total nighttime snow accumulation of less than a half inch possible.
Mostly Cloudy
then Snow
Likely
Sunday

Sunday: Snow.  High near 30. East wind 10 to 15 mph, with gusts as high as 20 mph.  Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Snow

Sunday
Night
Sunday Night: Snow, mainly before 7pm.  Low around 22. North wind 5 to 10 mph.  Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Snow then
Chance Snow

Washington's
Birthday
Washington's Birthday: A 30 percent chance of snow, mainly before 7am.  Mostly cloudy, with a high near 30. North northwest wind 5 to 10 mph.
Chance Snow

Monday
Night
Monday Night: Mostly cloudy, with a low around 18. North wind around 5 mph becoming calm  in the evening.
Mostly Cloudy

Tuesday

Tuesday: Partly sunny, with a high near 32.
Partly Sunny

Tuesday
Night
Tuesday Night: Snow likely after 1am.  Mostly cloudy, with a low around 24. Chance of precipitation is 70%.
Mostly Cloudy
then Snow
Likely
Wednesday

Wednesday: Snow likely before 1pm, then a slight chance of rain and snow.  Cloudy, with a high near 35.
Snow Likely
then
Rain/Snow
Likely
Wednesday
Night
Wednesday Night: A chance of rain and snow before 8pm, then a chance of snow between 8pm and 1am.  Mostly cloudy, with a low around 23.
Chance
Rain/Snow
then Chance
Snow
Lo 24 °F Hi 30 °F Lo 22 °F Hi 30 °F Lo 18 °F Hi 32 °F Lo 24 °F Hi 35 °F Lo 23 °F

Hazardous Weather Outlook
 

Tonight
 
Snow likely, mainly after 5am. Mostly cloudy, with a low around 24. East wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of less than a half inch possible.
Sunday
 
Snow. High near 30. East wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Sunday Night
 
Snow, mainly before 7pm. Low around 22. North wind 5 to 10 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Washington's Birthday
 
A 30 percent chance of snow, mainly before 7am. Mostly cloudy, with a high near 30. North northwest wind 5 to 10 mph.
Monday Night
 
Mostly cloudy, with a low around 18. North wind around 5 mph becoming calm in the evening.
Tuesday
 
Partly sunny, with a high near 32.
Tuesday Night
 
Snow likely after 1am. Mostly cloudy, with a low around 24. Chance of precipitation is 70%.
Wednesday
 
Snow likely before 1pm, then a slight chance of rain and snow. Cloudy, with a high near 35.
Wednesday Night
 
A chance of rain and snow before 8pm, then a chance of snow between 8pm and 1am. Mostly cloudy, with a low around 23.
Thursday
 
Partly sunny, with a high near 34.
Thursday Night
 
Partly cloudy, with a low around 16.
Friday
 
Mostly sunny, with a high near 38.
Friday Night
 
Mostly cloudy, with a low around 27.
Saturday
 
A chance of rain and snow. Mostly cloudy, with a high near 43.

 

Forecast from NOAA-NWS for Peotone IL.

000
FXUS63 KLOT 162054
AFDLOT

Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
254 PM CST Sat Feb 16 2019

.SHORT TERM...
249 PM CST

Through Sunday Night...

Main forecast concerns/challenges are with a period of light snow
likely from late tonight through Sunday.

In the near term, surface ridge is situated across parts of the
upper Midwest and Great Lakes region. In this pattern, easterly
flow being observed, while stratus remains in place across much of
the CWA. Some partial clearing possible across parts of the
southern CWA but as mid/high clouds spread across the region
tonight, cloudy skies will return. Turn focus to expected snowfall
tonight into Sunday, with a period of mainly light snow likely
very late tonight through Sunday afternoon and evening. Large
upper level trough expected to shift east through the CONUS
tonight into Sunday, with a mid level low moving into the northern
Plains. Out ahead of this, energetic mid levels will usher in
several short wave troughs, with WAA increasing out ahead of these
early Sunday morning. These features will assist with saturating
the column, with some drier in place likely delaying the onset of
snow, and then support blossoming snow across the area. Start time
for snow across north central IL is appearing to be right around
3-5 AM, around 4-6 AM for locations in northeast IL, and then soon
there after across northwest IN. Forcing appearing to be the
strongest Sunday morning, as some additional support from some
FGEN swings through. Additionally, forcing will also coincide with
the snow growth zone during this time. However, at this time,
guidance still showing any persistent or strong FGEN will be
lacking for the remainder of the day. Forcing likely weakening in
the afternoon and early evening, but with surface trough and large
upper level trough still in place, will likely support additional
snow development.

Light, to occasionally moderate, snow likely Sunday morning and
then periods of light snow expected through the afternoon and
early evening. Have slightly increased snowfall amounts with 2-4
inches expected across parts of north central and far northern IL.
In this location, some locally higher amounts of 5 inches are
possible, and have issued an Advisory for these locations.
Elsewhere across northeast IL and northwest IN, expect 1-3 inches.
Lake enhancement is possible across far northeast IL in the
afternoon, but conditions still not appearing overly favorable and
don`t anticipate this to add to the totals in this location at
this time. Delta Ts and inversion height do increase Sunday night
and could support some continued light snow development for areas
near the lake behind the system snowfall. It is appearing that
greater focus will stay just to the north in Wisconsin though.
This focus does have the possibility to swing south by very late
Sunday night into early Monday morning, and could provide some
slight increase in intensity. However, confidence is low at this
time. Will need to monitor for the possibility of a period of
freezing drizzle Sunday afternoon into Sunday evening for
locations south of I-80. Some guidance showing the deeper moisture
shifting to the east, while forcing remains in place. Not too
confident at this possibility at this time, but pattern could
support this freezing drizzle and this will need to be monitored
with later forecasts.

Rodriguez

&&

.LONG TERM...
249 PM CST

Sunday night through Saturday...

Persistent troughing in the western CONUS and persistent ridging
in the eastern CONUS will continue to dominate the 500-hPa pattern
through next Friday. The primary concern is a mid-level
disturbance that will likely impact the region overnight Tuesday
into Wednesday morning. The latest GFS guidance suggests 850-hPa
WAA, assisted by anticyclonic flow off the coast of the Carolinas,
will ramp up across the Midwest during this 10-12 hour period.
This will provide the synoptic-scale rising motion necessary for
precipitation. GFS cross-sectional analysis further suggest that
peak negative omega values centered within the DGZ will combine
with adequate moisture from the Gulf of Mexico, providing ample
conditions for snow throughout Chicagoland. Accumulation as a
result of this disturbance could result in several inches of snow
by early afternoon Wednesday, with possible higher totals in the
northwestern CWA. It is important to note, however, that a fair
bit of uncertainty exists with the spatial and temporal onset of
this system. Any slight deviations in its track early next week
could result in vastly different outcomes than those presented
here. We will continue to monitor this development.

DL/Rodriguez

&&

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

High-end MVFR ceilings are expected to persist into the overnight
hours at all sites, though a few breaks will be possible at times
this evening. A broad and slow-moving low pressure system will then
bring an extended period of light SN to the area late tonight
through Sunday. Precip may begin as SHSN with varying visibility
into mid-morning Sunday, then become a more widespread SN during the
afternoon hours. MVFR ceilings and IFR visibility can be expected,
though periods of IFR ceilings and LIFR visibility will be possible
during the more widespread SN Sunday afternoon. Winds throughout the
period should remain NE/E, with gusts to 20 knots possible during
the steady SN.

Kluber

&&

.LOT WATCHES/WARNINGS/ADVISORIES...
IL...Winter Weather Advisory...ILZ003-ILZ004-ILZ008-ILZ010-ILZ011-
     ILZ019...midnight Sunday to midnight Monday.

     Winter Weather Advisory...ILZ005-ILZ006...3 AM Sunday to 6 AM
     Monday.

IN...None.
LM...Small Craft Advisory...LMZ740-LMZ741-LMZ742-LMZ743...midnight
     Sunday to 4 AM Monday.

&&

$$

VISIT US AT HTTP://WEATHER.GOV/CHICAGO (ALL LOWERCASE)

FOLLOW US ON FACEBOOK...TWITTER...AND YOUTUBE AT:
WWW.FACEBOOK.COM/NWSCHICAGO
WWW.TWITTER.COM/NWSCHICAGO
WWW.YOUTUBE.COM/NWSCHICAGO

NWS LOT Office Area Forecast Discussion