Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
416 PM EDT Thu Sep 09 2021

Valid 00Z Fri Sep 10 2021 - 00Z Sun Sep 12 2021

...There is a Slight Risk of excessive rainfall over parts of Maine
through Friday morning...

...Tropical Depression Mindy moves off the Georgia coast out over the
Atlantic and is forecast to become extratropical slowly...

...Heatwave over the West will slowly weaken as a Critical Risk of fire
weather is over the Northwest...

A front extending from the Northeast Coast to the Gulf of Mexico will
slowly move eastward off most of the East Coast by Friday morning. Showers
and thunderstorms will develop along and ahead of the front over parts of
the Northeast. Furthermore, heavy rain is associated with these
thunderstorms that will fall over parts of Maine. Therefore, the WPC has
issued a Slight Risk of excessive rainfall with these thunderstorms
through Friday morning.  The associated heavy rain will create mainly
localized areas of flash flooding, with urban areas, roads, and small
streams the most vulnerable. The excessive rainfall threat will end over
the Northeast on Friday morning as the front continues to move offshore.

Meanwhile, Tropical Depression Mindy moves off the Georgia coast out over
the Atlantic and is forecast to become an extratropical low by Friday
evening.  The front over the Gulf Coast will become quasi-stationary,
aiding in developing numerous showers and thunderstorms over parts of the
Gulf Coast through Saturday.

Elsewhere, an upper-level high over the Great Basin will aid in producing
record high temperatures over the Western States will move over parts of
the Central Rockies and the Central/Southern High Plains on Friday.
However, upper-level energy moving over the Northwest will produce some
showers on Friday into Saturday. Additionally, some of the storms, maybe
dry thunderstorms along with gusty winds, lead to a Critical Risk of fire
weather threat over parts of the Northwest, with a large area of a
Critical Risk of fire weather over parts of the Great Basin into the
Northern Rockies/Northern High Plains. Therefore, Red Flag Warnings are
over parts of the Pacific Northwest/Northern California into the Northern
Rockies and Northern High Plains. Furthermore, Air Quality Alerts up over
parts of the Pacific Northwest, Idaho, Wyoming, and Colorado due to
wildfire smoke.

Ziegenfelder





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