Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
435 PM EDT Wed Sep 20 2017
Valid 00Z Thu Sep 21 2017 - 00Z Sat Sep 23 2017
...Tropical Storm Jose will produce dangerous surf conditions and rip
currents along with heavy rain over parts of Southern New England Coast...
...There is a slight risk of severe thunderstorms over parts of the Upper
Great Lakes/Upper Mississippi Valley...
...Heavy snow possible in the higher elevations of the Northern Rockies...
Tropical Storm Jose will continue to weaken as it moves northeastward then
returns southwestward while remaining off the Northeast coast. The storm
will produce rain with embedded thunderstorms over parts of Southern New
England Coast through Friday. For more information on Jose, please refer
to the National Hurricane Center (www.hurricanes.gov).
A front extending from the Upper Great Lakes/Upper Mississippi Valley
southwestward to the Southern Plains will move eastward into the Great
Lakes/Middle Mississippi Valley and dissipates on Thursday afternoon into
evening. Showers and thunderstorms will develop over parts of the Upper
Great Lakes/Middle Mississippi Valley that will move into the Great
Lakes/Middle Mississippi Valley overnight Wednesday while dissipating over
the Middle Mississippi Valley by Thursday afternoon. The showers and
thunderstorms will continue over parts of Northern Michigan through
Friday. Another front over the Northern Rockies/Northern High Plains into
parts of the Great Basin/Northern California will move to the Upper
Mississippi Valley and the Northern/Central Plains into the Central
Rockies/Great Basin by Friday. The system will produce rain with embedded
thunderstorms with snow at the highest elevations over the Northern
Rockies and rain over the Pacific Northwest that will wane over the
Northwest by Thursday morning. The rain with the higher elevations snow
over the Northern Rockies will continue through Friday.
The active stormy pattern for the Pacific Northwest and Intermountain West
will continue through the short term period. Heavy rainfall is expected
throughout the Pacific Northwest and into the Intermountain West on
Wednesday with higher elevation snow for the Cascades and Northern
Rockies. By Thursday, rainfall activity will decrease in the Pacific
Northwest while increasing across the Central Great Basin. Snowfall will
also be possible in the higher elevations of the northern Rockies, Utah,
Nevada, and even the highest peak in the Sierra Nevada mountains on
Thursday. By Friday morning, precipitation will move eastward across the
northern Rockies and Great Basin.
Elsewhere, locally heavy rainfall can be expected for south and central
Texas on Thursday as deep moisture feeds across the state. The Gulf coast
can also expect scattered showers and thunderstorms especially on
Thursday--with locally heavy rainfall possible in the southern half of
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php