Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
456 PM EDT Thu May 23 2013

Valid 00Z Fri May 24 2013 - 00Z Sun May 26 2013

***Rain and a few thunderstorms for the Northeast U.S.***

***Cooler temperatures arriving for the East Coast***

***Trough and unseasonably cool weather for the Northwest***

Warm and humid conditions in the East will give way to scattered showers
and thunderstorms Thursday and Thursday night. Some storms may become
severe over portions of the northern Mid-Atlantic states. The weather
turns cooler behind the front, with high temperatures on Friday falling
back 15-25 degrees from highs on Thursday.   

A deep trough of low pressure in the Pacific Northwest will continue to
produce well below normal temperatures, showers and a few thunderstorms in
the Rockies.  Unusually low snow levels and snowfall accumulations have
already been observed over interior sections of Washington and along the
Continental Divide.  The potential for brief periods of snow showers
remains a possibility through Friday night above treeline.

For the Great Lakes and Midwest, cool high pressure will prevail through
the early part of the holiday weekend.  Scattered light frosts are
possible across northern parts of the Upper Midwest and into southern
Canada, and high temperatures will likely be on the order of 10-15 degrees
below normal for this time of year.

Hamrick


Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php