Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
439 PM EDT Mon Apr 21 2014
Valid 00Z Tue Apr 22 2014 - 00Z Thu Apr 24 2014
...Numerous showers and thunderstorms are expected with a cold front
crossing the Mississippi River Valley Monday night...
...Late season snowfall accumulations will be possible along the
Cascades...Sierra Nevada...and Northern Rockies...
Numerous showers and thunderstorms will continue to breakout ahead of a
cold front pushing east through the Mississippi River Valley Monday night
into Tuesday. The relatively quick progression of the front should
minimize the threat for flash flooding; However...there will be a chance
for some developing storms to become strong or even severe...especially
farther south across southwest Arkansas and southwestward back into Texas.
Showers and thunderstorms will continue to accompany the front while it
crosses the Appalachians Tuesday evening and clears much of the Atlantic
coast Wednesday morning. Widespread above normal temperatures ahead of
the front should give way to cooler and drier conditions in the system's
Weather in the western U.S. will become increasingly active as a Pacific
front slowly makes its way onshore. An expansive area of shower activity
is expected across the northwestern corner of the Nation on Tuesday...and
orographics will help enhance precipitation over the favored slopes of the
terrain. Also...plummeting temperatures behind the front will lower snow
elevations and allow for some late season accumulations along the
Cascades...Sierra Nevada...and Northern Rockies. By Wednesday
evening...the northern portion of the front will push out into the
Plains...and rain with embedded thunderstorms should begin developing
across the Dakotas. Meanwhile...even as the front progresses east of the
Rockies...persistent onshore flow behind the system will keep conditions
wet across the Northwest through the middle of the week.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php