Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
453 PM EDT Tue Apr 22 2014
Valid 00Z Wed Apr 23 2014 - 00Z Fri Apr 25 2014
...Late season snowfall accumulations expected across the Cascades and
...Severe weather will be possible over the Southern to Central High
Plains on Wednesday...
...Conditions will be slow to clear out in the Northeast...
Widespread shower activity will continue to develop across the
northwestern corner of the Nation through the middle of the week...behind
a strong cold front slowly pushing south and east out of the Western U.S..
Persistent onshore flow from the Pacific...combined with orographic
effects...will help boost precipitation totals along coastal areas from
northern California to Washington...as well as farther inland over the
upslope side of the Cascades and Northern Rockies. Additionally...falling
temperatures behind the front will allow for widespread snow showers
across the higher elevations...with impressive late season accumulations
expected along the Cascades...Bitterroots...and Tetons.
Weather will become quite active across the Central U.S. on Wednesday as
the cold front in the Western U.S. pushes east of the Rockies. A line of
convection is expected to fire up ahead of the boundary while it
progresses through the Central to Southern High Plains and heads towards
the Mississippi River Valley. Moisture being siphoned from the Gulf of
Mexico will fuel moderate to heavy rains within developing storms...and
ample amounts of instability will allow for storms to become strong or
even severe...especially over the Southern to Central High Plains.
Farther north...an axis of rain with embedded thunderstorms should develop
to the north of a surging warm front...expanding across the Dakotas and
Upper Mississippi Valley. By Thursday morning...precipitation lifting
into northern Minnesota...Wisconsin...and the Upper Peninsula of Michigan
could fall as snow.
Numerous showers and thunderstorms will continue to breakout ahead of cold
front crossing the Appalachians Tuesday night. The front should clear
much of the Eastern Seaboard by Wednesday morning...and cooler drier air
will fill in behind it. Although the boundary will be quick to depart the
coast...conditions will be slow to clear out across the Northeast...where
a surface low deepening offshore will bring continued moisture and
unsettled weather into the region. The majority of precipitation will
fall as rain...but snow will be a possibility within the higher elevations
of interior New England.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php