Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
418 PM EDT Tue Jun 18 2013

Valid 00Z Wed Jun 19 2013 - 00Z Fri Jun 21 2013

...Unsettled weather across the Pacific Northwest and the northern Rockies
through Thursday...

...Showers and thunderstorms across the Gulf coast and up the East Coast...


A strong upper low pressure system will bring the threat for rain and
thunderstorms across the Pacific Northwest and into the northern Rockies
throughout much of the forecast period. As the associated surface cold
front pushes slowly eastward across the Rockies on Wednesday, rain could
be heavy at times and a few of the thunderstorms could be severe. By
Wednesday afternoon, showers and thunderstorms will begin popping up
across the central and northern plains and eventually the Upper Midwest on
Thursday as the surface system strengthens over the mountains.

Another upper trough out east will drag a surface cold front off the
Mid-Atlantic coast on Wednesday morning. On Tuesday evening and into
Wednesday, showers and thunderstorms, some heavy at times especially along
and ahead of the boundary, will be possible from the Gulf coast states up
to southern New England. Behind the front, a cooler and dryer air mass
will fill in and bring rather pleasant weather to the Northeast and
temperatures below normal for this time of the year. The southern portion
of the front off shore is expected to linger across the southeastern
states which should keep the wet unsettled weather in place throughout
Thursday as well.


Monarski


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