A chilly east southeast wind of 12-15 MPH will persist overnight and increase to 15 MPH and increase to 15 to 25 MPH during the day on Monday with an advancing low pressure from the western plains. Gusts will be 18 to 24 MPH overnight to dawn, and will increase from 24 MPH to 36 MPH from about 6 a.m. until 9 p.m. Monday.
Light rain may start about noon Monday, changing to snow by 5 p.m. and continuing probably until midnight, but possibly as late as 2:00 a.m. Snow will be most intense from 6 p.m. until 11 p.m. with possible embedded thundersnow. It is also possible the the precipitation will begin entirely as snow instead of a rain/snow mix, especially distances further north of I-88.
Wintry wx returns Mon. Gusty winds & a wintry mix begins midday. Measurable snow is psbl N of I-80, with highest amounts across extreme nrn pic.twitter.com/ci9yorodAy
— NWS Chicago (@NWSChicago) March 4, 2018
Snow will be very wet and possibly slushy, especially with temperatures above freezing all day after 8 a.m. with a high of 36°F about 2 p.m. The ground temperatures have warmed up with consecutive daily highs reaching at least 40°F and sometimes in the mid 60s since February 18, 2018. Most of Illinois south of I-88 was above 40°F at 7:00 p.m. Sunday, March 4, 2018. Northwest Illinois west of Freeport, Illinois was also still in the 40s at 7 p.m.
There is likely to be more snow accumulation on grassy areas, but snow accumulation on pavement could be about 3″. There will be some solar heating of the ground as full cloud coverage isn’t expected until about 5 p.m.
Another .6″ to 1″ of snow is possible on Tuesday from about noon to midnight Tuesday/Wednesday.
After a spring-like day today, wintry weather returns Monday followed by cooler temperatures Wed & Thurs. pic.twitter.com/oidfAfoAYN
— NWS Chicago (@NWSChicago) March 4, 2018
Tonight: Mostly clear, with a low around 31. East southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Monday: Rain likely before 4pm, then rain and snow likely between 4pm and 5pm, then snow likely, possibly mixed with sleet after 5pm. Mostly cloudy, with a high near 39. Breezy, with an east southeast wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 70%. Little or no snow and sleet accumulation expected.
Monday Night: Snow, possibly mixed with sleet, becoming all snow after 8pm, then gradually ending. Some thunder is also possible. Low around 31. Breezy, with an east southeast wind 15 to 20 mph becoming south 5 to 10 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 100%. New snow and sleet accumulation of 1 to 3 inches possible.
Tuesday: A slight chance of snow showers before noon, then snow showers likely, possibly mixed with rain between noon and 3pm, then snow showers likely after 3pm. Cloudy, with a high near 36. South wind around 5 mph becoming west in the afternoon. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Tuesday Night: A 40 percent chance of snow showers. Cloudy, with a low around 27. North wind 5 to 15 mph, with gusts as high as 25 mph.
Wednesday: Partly sunny, with a high near 34.
Wednesday Night: Mostly cloudy, with a low around 22.
Winter Weather Advisory
URGENT – WINTER WEATHER MESSAGE
National Weather Service Chicago IL
307 PM CST Sun Mar 4 2018
…Period of Heavy Wet Snow Possible Monday Evening…
ILZ005-006-012>014-050515-
/O.NEW.KLOT.WW.Y.0014.180305T2200Z-180306T0600Z/
McHenry-Lake IL-Kane-DuPage-Cook-
Including the cities of Woodstock, Waukegan, Aurora, Elgin,
Wheaton, and Chicago
307 PM CST Sun Mar 4 2018
…WINTER WEATHER ADVISORY IN EFFECT FROM 4 PM MONDAY TO MIDNIGHT
CST MONDAY NIGHT…
* WHAT…Snow expected. The snow may fall heavy at times Monday
evening with snowfall rates up to an inch per hour possible.
Total snow accumulations of 2 to 4 inches are possible.
* WHERE…McHenry, Lake IL, Kane, DuPage and Cook Counties.
* WHEN…From 4 PM Monday to midnight CST Monday night.
* ADDITIONAL DETAILS…Plan on slippery road conditions. Be
prepared for reduced visibilities at times.
PRECAUTIONARY/PREPAREDNESS ACTIONS…
A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.
march.chicagoweatherstation.com
Chicago Weather Forecast for your MAC/PC/TABLET includes surrounding suburbs.
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