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Thursday, January 29, 2015

Icy Surprise Ahead?

Icy Surprise Ahead?

WINTER WEATHER ADVISORIES EXTENDED EAST TO 
BALTIMORE & NORTH DC METRO AREAS FOR SNOW & SLEET THURSDAY PM


1:10 PM 1/29 - Another Icy Surprise? We hope not, but atmospheric forces and ground temperature may have a different plan.

Our analysis of the enclosed image from the NOAA Storm Prediction Center indicates there is rising potential for a more widespread wintry mix event this afternoon across the region than may be expected. 


A fast-moving cold front is forcing a notable amount of moisture ahead of it. This moisture will be moving into a stubborn surface layer of cold air with ground temperatures at or below freezing. 

This may result in snow and sleet during the PM commute, starting between 3-4 PM in Frederick and Carroll County, moving to the Baltimore Metro areas between 4-5 PM, and tapering after 7 PM. 

Since a surprise ice event on Sunday 1/18 was produced by less than one-TENTH of an inch of ice (0.10"), this heightens concerns for areas along the I-95 corridor on west, especially for any untreated roads.