Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
419 AM EDT Fri Oct 08 2021

Valid 12Z Fri Oct 08 2021 - 12Z Sun Oct 10 2021

...Heavy rain and the potential for flash flooding continues into this
morning across portions of the Southeast...

...Anomalous heat across the central/southern Plains will be contrasted
with mountain snows across the northern/central Rockies into this
weekend...

A slow-moving weather pattern across the eastern half of the country
continues to bring unsettled weather across the region.  The main focus of
heavy rain will remain over portions of the Southeast this morning where
moisture coming up from the Gulf of Mexico will be lifted along a
stationary front.  The threat of heavy rainfall should gradually shift
eastward into the Carolinas later today where some locally heavy downpours
are possible, although widespread heavy rain is not expected.  Farther
north across much of the Midwest, Great Lakes, Ohio Valley and into the
southern Appalachians, a slow-moving upper trough/low will help trigger
additional clusters of showers and thunderstorms containing locally heavy
downpours.  By the weekend, the rain is expected to edge further eastward
into the East Coast as a coastal low pressure system is forecast to
develop just off the Carolina coasts where the National Hurricane Center
is monitoring a low potential for tropical cyclone formation.  By Saturday
night into Sunday morning, the threat of heavy rain and gusty winds could
increase near the North Carolina coast as the low pressure system may
strengthen and edge closer toward the coast.

For central and south-central sections of the U.S. mainland, a building
ridge of high pressure aloft will bring the potential of record-breaking
heat beginning today and continuing into the weekend, with high
temperatures forecast to soar into the 90s across the central and southern
Plains. These temperatures equate to around 10 to 20 degrees above average
with the warmest day forecast to occur on Saturday.

In contrast, a deep upper-level trough entering the West Coast will usher
in below average temperatures and chances for precipitation across much of
the interior western U.S. through the weekend.  In fact, snow is forecast
for the high elevations across parts of the Intermountain West and
northern/central Rockies.  Scattered showers and some thunderstorms are
also expected for the lower elevations.  By Saturday, a developing low
pressure system ejecting into the northern Plains will likely bring a
period of enhanced rainfall together with gusty winds across the region. 
Isolated severe thunderstorms are not out of the question for parts of the
area especially Saturday night into early Sunday.

Kong


Graphics are available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php