Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
356 PM EST Thu Dec 05 2013
Valid 00Z Fri Dec 06 2013 - 00Z Sun Dec 08 2013
...Major ice storm expected from the Central Texas to the Ohio Valley...
...Heavy snowfall expected from Oklahoma to Lower Great Lakes...
...Very cold airmass overspreading the West and Central U.S. with
temperatures 10 to 30 degrees below normal...
A classic ice storm pattern is taking shape from the Southern Plains to
the Ohio Valley. A strong cold front surging south and east will be
overrun by mild return flow off the Gulf of Mexico, leading to a prolonged
period of freezing rain and sleet from central Texas to the Ohio valley.
Precipitation is expected to develop in response to a strengthening
upper-level jet that remains well behind the surface cold front. As a
result, the majority of the precipitation will fall into the cold sector
of the storm, where significant icing is expected. The northern portion of
the precipitation will fall in the form of snow, with a band of moderate
snowfall expected from Oklahoma to Central Ohio. The cold front will
slowly push eastward with precipitation spreading into the Northeast and
In wake of the cold front pushing through the eastern U.S., a very cold
airmass will overspread the central and western U.S. Temperatures will be
10 to 30 degrees below normal for the next few days. High temperatures
will remain below zero for some parts of the northern Plains. A
reinforcing shot of cold air will arrive in the Pacific Northwest toward
the end of the period. Snowfall will be possible even within coastal
Washington and Oregon.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php