Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
343 PM EDT Tue Jul 22 2014
Valid 00Z Wed Jul 23 2014 - 00Z Fri Jul 25 2014
...Showers and thunderstorms move from the Upper Great Lakes to the Ohio
Valley and Northeast...
...Rain and thunderstorms will spread across the Northwest as energy moves
A surface front currently extending from the Upper Midwest to the Central
Plains will continue to push east and southward with time, reaching the
Northeast/Mid-Atlantic coast and the Tennessee Valley by Wednesday night.
Showers and thunderstorms associated with the boundary will spread from
the Upper Great Lakes this evening into the Ohio Valley and
Mid-Atlantic/Northeast by tomorrow. During the afternoon hours of
Wednesday, a few of the storms could be strong to severe, especially in
New England where strong lifting and plenty of instability will be present
just ahead of the boundary.
Out west, an expansive area of upper level energy will move onshore by
Wednesday evening. Showers and thunderstorms will continue to spread
across the Pacific Northwest, Intermountain West, and Northern Rockies. A
few of the thunderstorms could be severe, as forecast by the Storm
Prediction Center, especially across portions of the Northern Rockies on
Wednesday. By Wednesday afternoon, the rain will begin moving into the
Northern High Plains, and is expected to become more widespread across the
Dakotas and eastern Nebraska overnight Wednesday and into Thursday.
Elsewhere, a weakening boundary and small pieces of upper level energy
along the central Gulf Coast keeps the showers and thunderstorms in the
forecast. By Wednesday afternoon however, most of the activity should
become confined to the southeast and Gulf coasts as the front finally
disappears by that time. Across the Southwest, diurnally driven monsoonal
moisture into the region keeps afternoon/evening showers and storms in the
forecast for the Four Corners region and into the Central Rockies.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php