Winter Storm Isaiah: Heavy Rain, Sleet and Ice, Strong Winds and a Little Over 3 Inches of Snow in Period from Friday 4PM to Sunday 5AM

Heavy rain, mixed precipitation including freezing rain and snow/sleet, and strong winds are forecast to bring significant hazards in parts of Chicagoland. The deepest snow accumulations are expected in south-central Wisconsin and northern Iowa. The Weather Channel is calling the storm Winter Storm Isaiah.

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winter storm Isaiah

winter storm Isaiah Chicago

A cold front drifting southeast is expected to stall near I-55. Moisture in the air and ground is high, and rainfall up to 1 inch per hour is possible along with a little lightning and thunder Friday night and overnight Friday/Saturday.

HEAVY RAIN: Sat. 6PM – Sun. 8AM
FREEZING RAIN: Sat. 7AM – 4PM
SLEET: Sat. 9AM – 6PM
SNOW: Sat. 5PM – 11PM
LIGHT SNOW: Sat. 11PM – Sun. 5AM
PEAK WIND GUSTS: NW 39-40 MPH Sat. 7AM – 5PM

Arlington Heights and neighboring communities may experience about 2 inches of rain between 3 PM Friday and 10 AM Saturday. Sleet and freezing rain are forecast to begin between 7 AM and 10 AM Saturday. Snow is forecast to begin about 5 PM Saturday with the most intense snow occurring between 6 PM and midnight Saturday/Sunday. Light snow and flurries are forecast to linger until 5 AM. Total snow accumulation by 5:00 a.m. Sunday is forecast at 3.4 inches.

Weather Radar (also nexrad.chgowx.com) shows most precipitation west of the Mississippi River, and south of a line from Quincy to Danville, moving southwest to northeast.





Flood Watch in effect from January 10, 06:00 PM CST until January 11, 06:00 PM CST

Lakeshore Flood Warning in effect from January 11, 12:00 AM CST until January 12, 06:00 AM CST

Winter Weather Advisory in effect from January 11, 06:00 AM CST until January 12, 03:00 AM CST

 O’HARE FORECAST … 

This Afternoon: A 40 percent chance of rain. Patchy fog before 3pm. Otherwise, cloudy, with a steady temperature around 42. North northeast wind around 10 mph, with gusts as high as 15 mph.

Tonight: Rain. The rain could be heavy at times. Low around 33. Breezy, with a north northeast wind 15 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.

Saturday: Rain, possibly mixed with freezing rain and sleet before 1pm, then sleet, possibly mixed with freezing rain. The rain could be heavy at times. Temperature falling to around 31 by 5pm. Windy, with a northeast wind 25 to 30 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New ice accumulation of less than a 0.1 of an inch possible. New sleet accumulation of less than a half inch possible.

Saturday Night: Snow and sleet, possibly mixed with freezing rain, becoming all snow after 8pm. Low around 20. Blustery, with a northeast wind 15 to 25 mph becoming northwest after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 100%. Little or no ice accumulation expected. New snow and sleet accumulation of 1 to 3 inches possible.

Sunday: A 30 percent chance of snow before 7am. Mostly sunny, with a high near 30. West northwest wind 10 to 15 mph becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 25 mph.

Sunday Night: A 20 percent chance of snow after 1am. Mostly cloudy, with a low around 24.

Monday: A 20 percent chance of snow before 7am. Partly sunny, with a high near 37.

Monday Night: A chance of snow after 1am. Mostly cloudy, with a low around 29.

Tuesday: A chance of rain and snow before 10am, then a chance of rain between 10am and 1pm. Mostly cloudy, with a high near 43.

Tuesday Night: Mostly cloudy, with a low around 25.

Wednesday: A chance of rain and snow. Mostly cloudy, with a high near 37.

Wednesday Night: A chance of snow. Mostly cloudy, with a low around 12.

Thursday: A chance of snow. Mostly sunny, with a high near 21.

 LAKE TEMPS … 

SOUTHERN LAKE MICHIGAN WATER TEMPERATURES
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
950 AM CST Fri Jan 10 2020

LAKE MICHIGAN WATER TEMPERATURES…

CHICAGO SHORE……….37

CHICAGO CRIB……….33

MICHIGAN CITY……….36

&&

M IS FOR MISSING DATA THAT IS NORMALLY AVAILABLE.

THE MICHIGAN CITY WATER TEMPERATURE SENSOR IS LOCATED AT A WATER
INTAKE ONE MILE OFFSHORE AND 60 FEET BELOW WATER SURFACE. IT IS READ EVERY DAY OF THE YEAR.

january.chicagoweatherstation.com

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FLOOD WATCH

National Weather Service Chicago IL
220 PM CST Fri Jan 10 2020

…Heavy Rain Likely Tonight and at Times on Saturday…

DuPage-Cook-Kendall-Grundy-Will-Kankakee-Livingston-Iroquois-Ford-
Lake IN-Porter-Newton-Jasper-Benton-
Including the cities of Naperville, Wheaton, Downers Grove,
Elmhurst, Lombard, Carol Stream, Addison, Chicago, Humboldt Park,
Hyde Park, Lakeview, Lincoln Park, Logan Square, Navy Pier,
Oswego, Boulder Hill, Yorkville, Plano, Morris, Coal City,
Minooka, Joliet, Bolingbrook, Kankakee, Bourbonnais, Bradley,
Pontiac, Dwight, Fairbury, Watseka, Gilman, Onarga, Paxton,
Gibson City, Gary, Hammond, East Chicago, Merrillville, Portage,
Valparaiso, Chesterton, Roselawn, Kentland, Morocco, Goodland,
Brook, Rensselaer, DeMotte, Fowler, Otterbein, Oxford,
and Boswell

FLOOD WATCH REMAINS IN EFFECT FROM 6 PM CST /7 PM EST/ THIS
EVENING THROUGH SATURDAY AFTERNOON…

The Flood Watch continues for

* Portions of Illinois and northwest Indiana, including the
following areas, in Illinois, Cook, DuPage, Ford, Grundy,
Iroquois, Kankakee, Kendall, Livingston, and Will. In
northwest Indiana, Benton, Jasper, Lake IN, Newton, and
Porter.

* From 6 PM CST /7 PM EST/ this evening through Saturday
afternoon

* WHAT…Moderate to heavy rain will envelop the area this evening
and continue into Saturday morning before becoming more periodic
and eventually changing over to wintry precipitation Saturday
afternoon or night. Rainfall totals through Saturday afternoon
of two to four inches are expected, with locally higher amounts
possible. Significant rainfall accumulations and high rainfall
rates may cause flooding of area rivers and poor drainage areas.

* IMPACTS…River and small stream flooding likely. Roadways,
viaducts, ditches, and other poor drainage areas may be impacted
in urban areas. Agricultural land and poor drainage areas may be
inundated in rural areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

A Flood Watch means there is a potential for flooding based on
current forecasts.

Monitor the latest forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be
prepared to take action should flooding develop.

WINTER WEATHER ADVISORY

URGENT – WINTER WEATHER MESSAGE
National Weather Service Chicago IL
1144 AM CST Fri Jan 10 2020

…Periods of Wintry Precipitation, Possibly Significant, Tonight
Through Saturday Night…

Cook-
Including the cities of Chicago, Humboldt Park, Hyde Park,
Lakeview, Lincoln Park, Logan Square, and Navy Pier
1144 AM CST Fri Jan 10 2020

…WINTER WEATHER ADVISORY IN EFFECT FROM 6 AM SATURDAY TO 3 AM
CST SUNDAY…

* WHAT…Rain is likely to change over to a period of light
freezing rain and sleet Saturday morning. Total ice
accumulations of up to one tenth of an inch are possible
Saturday morning, mainly over northern Cook. While
precipitation may lighten in intensity late Saturday morning
through mid afternoon, a period of snow is likely to develop
Saturday evening. Total snow accumulations of 1 to 3 inches are
possible. Northeast winds will gust as high as 45 mph overnight
into Saturday and combined with ice and snow may cause further
impacts.

* WHERE…Cook County.

* WHEN…From 6 AM Saturday to 3 AM CST Sunday.

* IMPACTS…Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

Slow down and use caution while traveling.

The latest road conditions for Illinois can be obtained on the
Internet at www.gettingaroundillinois.com. The latest road
conditions for Indiana are available by calling 18002617623.