A powerful late Fall snow storm is delayed about 3 hours from yesterday’s forecast. The snow depth forecast is also slightly lower for Arlington Heights from 9.1″ to 8.1″. The significant snowfall with minor accumulation is now expected to start about noon, instead of 9:00 a.m.
Two bursts of high snowfall rate periods are forecast today: 10:00 a.m. to noon and 6:00 p.m. to 5:00 a.m. Monday. The National Weather Service is warning of sporadic blizzard-like conditions between 5:00 p.m. and 5:00 a.m. Winds are forecast to be sustained in the upper 20-30 MPH range and to gust to about 40-45 MPH from 7:00 p.m. Sunday to 4:00 a.m. Monday, bringing the possibility of downed power lines with downed tree limbs. The commute will be difficult Monday morning.
The first burst Sunday morning from 10:00 a.m. to noon will involve rain mixed with gradually increasing snowfall rates, but accumulation of snow is not expected to begin in Arlington Heights and the northwest suburbs until about noon.
The forecast calls for only about 0.3 inch of snow by 5-6:00 p.m. which will occur during the lull (light snowfall period, 12:00 p.m. to 6:00 p.m.) between the higher snowfall rate periods. In other words, there might be some high snowfall rates before noon, but no accumulation; and then some low snowfall rates until about 5-6 PM. Then the high snowfall rates with deep accumulation begins after 6 PM. Air pressure will begin to drop at about noon Sunday from 1012 mb to about 1002 mb by midnight Sunday/Monday. Air temperature is forecast to hold at 35°F, but initially has been higher at about 38°F.
The first half of the second burst of high snowfall with high winds, beginning about 6:00 p.m., is expected to bring about 4.0 inches of snow accumulation by midnight.
The second half of the second burst of snowfall with high winds is expected to bring an additional 3.7 inches of snow accumulation by 5-6:00 a.m., bringing a total of about 8.0 inches by 6:00 a.m. and another 0.1 inch of lingering light snow that will stop by 11:00 a.m. Monday.
Very small snow/ice pellets were falling in Arlington Heights at 9:10 a.m. Sunday.
Weather Radar (also nexrad.chgowx.com) showed a band of rain precipitation across the entire width of Illinois drifting north. At 8:20 a.m. radar indicated snow west and southwest of Rockford. At 9:25 a.m. radar indicated snow from northwest Cook County west to Rockford and the Illinois-Iowa border and beyond.
#GetReady! Here's the latest update from the NWS on the incoming major winter storm heading in our direction. This is a potentially dangerous storm and you need to be aware of quickly changing conditions later today and tonight. The NBC 5 Storm Team will track @nbcchicago pic.twitter.com/SkJ8pY74ir
— Andy Avalos (@AndyAvalosNBC5) November 25, 2018
— The Weather Channel (@weatherchannel) November 25, 2018
— The Weather Channel (@weatherchannel) November 24, 2018
— Mike Seidel (@mikeseidel) November 25, 2018
Winter Storm Warning
Lakeshore Flood Warning
Today: Rain and snow, mainly before 1pm. High near 36. Breezy, with a northeast wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 35-40 mph. Chance of precipitation is 100%. Total daytime snow accumulation of less than a half inch possible.
Tonight: Rain and snow, becoming all snow after 10pm. The snow could be heavy at times. Areas of blowing snow after 10pm. Low around 26. Windy, with a north wind 25 to 30 mph, with gusts as high as 40-45 mph. Chance of precipitation is 100%. New snow accumulation of 6 to 10 inches possible.
Monday: A 30 percent chance of snow before noon. Patchy blowing snow before 8am. Mostly cloudy, with a high near 30. Blustery, with a west northwest wind 15 to 20 mph, with gusts as high as 35 mph.
Monday Night: Partly cloudy, with a low around 15. West northwest wind around 10 mph.
Tuesday: Partly sunny, with a high near 23. West wind around 10 mph.
Tuesday Night: Partly cloudy, with a low around 14.
Wednesday: Sunny, with a high near 26.
Wednesday Night: Partly cloudy, with a low around 17.
Thursday: A slight chance of snow. Partly sunny, with a high near 32.
Thursday Night: A chance of snow after midnight. Mostly cloudy, with a low around 26.
Friday: Mostly cloudy, with a high near 38.
Friday Night: Mostly cloudy, with a low around 32.
Saturday: A chance of rain and snow. Cloudy, with a high near 42.
Winter Storm Warning
URGENT – WINTER WEATHER MESSAGE National Weather Service Chicago IL 329 AM CST Sun Nov 25 2018
ILZ006-013-014-251730- /O.EXT.KLOT.WS.W.0003.181125T1800Z-181126T1500Z/ Lake IL-DuPage-Cook- Including the cities of Waukegan, Wheaton, and Chicago 329 AM CST Sun Nov 25 2018
…WINTER STORM WARNING NOW IN EFFECT FROM NOON TODAY TO 9 AM CST MONDAY…
* WHAT…Heavy snow expected. Blowing snow possible. Total snow accumulations 5 to 10 inches with localized amounts up to 12 inches are expected. Lower amounts across southeast Cook County and downtown Chicago. Winds gusting as high as 45 mph.
* WHERE…Lake IL, DuPage and Cook Counties.
* WHEN…From noon today to 9 AM CST Monday.
* ADDITIONAL DETAILS…Travel could be very difficult. Snow covered roads and significantly reduced visibility are expected. Snowfall rates in excess of 2 inches per hour are possible. This snow is expected to very heavy and will be difficult to shovel. The strong winds and heavy snow may cause falling tree limbs and possible power outages.
A Winter Storm Warning for snow means severe winter weather conditions will make travel very hazardous or impossible. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.
Lakeshore Flood Warning
Lakeshore Hazard Message National Weather Service Chicago IL 338 AM CST Sun Nov 25 2018
ILZ014-INZ001-002-251745- /O.CON.KLOT.LS.W.0002.181126T0300Z-181126T1800Z/ Cook-Lake IN-Porter- 338 AM CST Sun Nov 25 2018
…LAKESHORE FLOOD WARNING REMAINS IN EFFECT FROM 9 PM THIS EVENING TO NOON CST MONDAY…
* LAKE SHORE FLOODING…Abnormally high lake levels combined with strong onshore winds, potentially gusting over 50 mph, and waves of 12 to 16 ft along the Cook County shore and 14 to 18 ft along the Indiana shore will likely result in lake shore flooding.
* TIMING…Sunday evening through Monday morning.
* IMPACTS…Significant coastal erosion and flooding of flood prone areas along the lake are likely.
A Lakeshore Flood Warning means that flooding is occurring or imminent along the lake. Residents on or near the shore in the warned area should be alert for rising water…and take appropriate action to protect life and property.
LAKE TEMPS …
SOUTHERN LAKE MICHIGAN WATER TEMPERATURES
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
908 AM CST Sun Nov 25 2018
LAKE MICHIGAN WATER TEMPERATURES…
SOUTH MID LAKE BUOY……….43.
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.
Chicago Weather Forecast for your MAC/PC/TABLET includes surrounding suburbs.
^^ MOBILE? USE VOICE MIC ^^
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