Snowfall Depth Downgraded for Most of Northern Cook County

Snowfall depth has been downgraded for northern Cook County from 6″-8″ to 4″-6″. Most of Lake County and a small part of northeastern Cook County are in the forecast area for 6″-8″.

URGENT – WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
905 PM CST THU FEB 23 2012

LAKE IL-DUPAGE-COOK-WILL-
INCLUDING THE CITIES OF…WAUKEGAN…WHEATON…CHICAGO…JOLIET
905 PM CST THU FEB 23 2012

…WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST
FRIDAY…

* TIMING…RAIN AND WET SNOW WILL CHANGE TO ALL WET SNOW OVERNIGHT

* ACCUMULATIONS…TOTAL ACCUMULATION OF 2 TO 6 INCHES CAN BE
EXPECTED WITH LOCALLY HEAVIER AMOUNTS POSSIBLE. THE HEAVIEST
AMOUNTS WILL TEND TO BE FARTHER NORTH TOWARD THE WISCONSIN
BORDER WITH LESSER AMOUNTS SOUTH TOWARD INTERSTATE 80.

* MAIN IMPACT…HEAVY WET SNOW MAY FALL AT RATES GREATER THAN AN
INCH PER HOUR OVERNIGHT. THIS WILL LIKELY RESULT IN QUICK
ACCUMULATION OF WET SNOW ON ROADS… RESULTING IN SLIPPERY AND
POTENTIALLY HAZARDOUS TRAVEL CONDITIONS.

* OTHER IMPACTS…IN ADDITION TO ACCUMULATION AND SLIPPERY TRAVEL
IMPACTS…STRONG WINDS WILL RESULT IN WIND WHIPPED HEAVY WET
SNOW CAUSING SEVERELY REDUCED VISIBILITIES. DUE TO THE HIGH
LIQUID CONTENT OF THE SNOW…THOSE WITH HEALTH CONCERNS SHOULD
USE CAUTION WHEN SHOVELING. THIS ALSO MAY LEAD TO WEIGHTED DOWN
BRANCHES AND POWER LINES.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES…AND USE CAUTION WHILE
DRIVING.

Arlington Heights Forecast as of 8:00 p.m.

Tonight: Rain and snow, becoming all snow after 9pm. The snow could be heavy at times. Some thunder is also possible. Low around 32. North northeast wind between 10 and 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 4 to 8 inches possible.

Friday: Snow. High near 35. Northwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.

Friday Night: A 30 percent chance of snow showers, mainly before midnight. Mostly cloudy, with a low around 19. West northwest wind between 10 and 15 mph, with gusts as high as 25 mph.



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