Short Range Forecast Discussion...Amended
NWS Weather Prediction Center College Park MD
825 AM EDT Sat Sep 20 2014
Valid 12Z Sat Sep 20 2014 - 12Z Mon Sep 22 2014
...Heavy rain will continue to impact New Mexico and Texas...
...Atlantic coastal low to bring showers and thunderstorms to Florida and
the Southeast coast...
The risk for excessive rainfall and the threat of flash flooding across
southeast New Mexico and the Big Bend/Texas Panhandle through early Sunday
morning remains, as remnant moisture from Odile continues to stream over
portions of southern New Mexico and Texas---with showers and thunderstorms
focusing along a stationary front draped across the southern half of the
Lone Star state. This stationary front extends eastward into the Gulf of
Mexico and the Florida peninsula to the Atlantic Ocean. A surface wave has
developed on the Atlantic side of the stationary front, and will slowly
migrate northeastward along the coast of Georgia and the Carolinas this
afternoon and tonight. On Sunday, the system will track from the Outer
Banks to the Gulf of Maine. Current forecasts indicate the bulk of the
precipitation will remain offshore, but occasional showers and light rain
will affect the majority of the immediate East Coast shoreline.
Elsewhere, a series of Pacific disturbances will race along the
US-Canadian border, with showers and thunderstorms expected today and
tonight from the Great Lakes to northern New England along its weakening
cold front. A second disturbance will move across the northern Plains
tonight and reach the Ohio Valley by late Sunday morning. Its cold front
will spread a drier airmass into the Plains and Midwest by the end of the
weekend---meanwhile its leading edge pushes through the eastern seaboard
and coalesces with the Atlantic coastal low in the Gulf of Maine and Nova
Scotia late Sunday night and early Monday morning.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php