Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
500 PM EDT Tue Jul 29 2014

Valid 00Z Wed Jul 30 2014 - 00Z Fri Aug 01 2014

...Heavy showers and thunderstorms expected to spread from the central
Rockies eastward into Oklahoma and Texas Panhandle...

...Unusually cool weather continues to dominate much of the eastern half
of the Nation...

During the short-term forecast period, an unusually broad and deep
upper-level trough will continue to dominate the weather across much of
the eastern half of the Country.  Temperatures underneath this upper
trough will remain unusually cool for mid-summer.  Conditions will be very
pleasant across a wide area from the Mississippi Valley eastward through
much of the East Coast.  Typical summer heat and humidity, along with a
chance of showers and thunderstorms, will be confined well to the south
along the Gulf Coast and into Florida.  Over the Great Lakes, where it is
closest to the upper-level low center in southern Canada, instabilities
will lead to scattered showers and thunderstorms with very cool
temperatures.

The below normal temperatures will extend westward into a good portion of
the Rockies where monsoonal type showers and thunderstorms will be the
rule over the next few days.  An upper-level impulse is forecast to move
across Colorado tonight.  This feature will generate its own pool of cool
air and will promote additional showers and thunderstorms to spread
eastward into the central Plains, especially Oklahoma and Texas Panhandle.
 Some of the rains can become heavy and could lead to flash flooding in
some areas.  The clouds and rains will lead to even cooler temperatures of
more than 20 degrees below normal in eastern Colorado on Wednesday.  The
cool pool of air will then spread south across much of Texas on Thursday.

The only area where temperatures are expected to be significantly above
normal will be in the Pacific Northwest into the northern Rockies where
little or no precipitation is expected.

Kong


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