Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
334 PM EDT Fri May 17 2013

Valid 00Z Sat May 18 2013 - 00Z Mon May 20 2013

...Severe thunderstorms are possible over parts of Central Texas, Central
Gulf Coast, and Northern Plains...

...Heavy rain possible for parts of the Central Appalachians and the Upper
Midwest...

A quasi-stationary east-west front extends from the Mid-Atlantic to the
Central Rockies/High Plains.  In addition to the boundary, upper-level
energy over the Tennessee Valley will drift eastward to the Central
Appalachians by Sunday. The energy will aid in the developing of showers
and thunderstorms from the parts of the Ohio Valley to the Mid-Atlantic as
well as the Central Gulf Coast/Tennessee Valley to the Central
Appalachians.  The showers and thunderstorms will move into parts of the
Southeast by Saturday evening/Sunday morning as well as remaining in the
Mid-Atlantic. 

Along the west end of the front, showers and thunderstorms will develop
over parts of the Upper Midwest through Saturday afternoon.  The showers
and thunderstorms will retreat to the Northern/Central Plains by Saturday
evening before moving eastward to the Upper Mississippi Valley/Middle
Missouri Valley by Sunday morning.

Upper-level trough over the West Coast will move eastward to the Rockies
by Sunday.  The instability associated with the upper-level trough and
elevated heat source will aid in producing showers and thunderstorms over
parts of the Northern Rockies/Great Basin expanding into the Central
Rockies by Sunday.  Additionally, onshore flow will produce rain along
parts of the pacific Northwest through Sunday. 


Ziegenfelder


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