Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
307 AM EDT Tue Sep 30 2014
Valid 12Z Tue Sep 30 2014 - 12Z Thu Oct 2 2014
***Strong low pressure system over the Great Plains***
***Showers and some mountain snow for the Rocky Mountains***
***Trough over the East Coast along with some showers***
The main weather maker across the continental U.S. will be a strengthening
surface low that will track across the Dakotas and into Manitoba, Canada
by Wednesday night. This will also be associated with an upper level low
that is lifting northward from the central Rockies. At the surface, a
slow moving cold front is progged to extend southward from this low with
another wave of low pressure forming along it over the central Plains.
In terms of sensible weather, there will likely be multiple rounds of
showers and thunderstorms extending from Texas to the Upper Midwest.
Locally heavy rainfall will also be possible ahead of the cold front where
moisture convergence is maximized. A few severe storms are possible with
the surge of warm and humid air in the warm sector of this system.
Elsewhere across the country, showers from time to time can be expected
from the Mid-Atlantic to the Northeast as a weak upper level low combines
with moisture advecting westward from the Atlantic Ocean. Scattered
showers and storms are in the forecast for the central Gulf Coast and
Florida. Out west over the northern Rockies, some high elevation snow
showers are likely above 8000 feet with lingering moisture and cold air
from the departing upper level low over the Dakotas.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php