Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
349 PM EDT Wed Aug 10 2022

Valid 00Z Thu Aug 11 2022 - 00Z Sat Aug 13 2022

...Heavy rain and flash flooding threat continues from the Ohio Valley
into the Mid-Atlantic and along the Gulf Coast...

...Monsoonal storms and the potential for flooding to continue for
portions of the Southwest into the Great Basin and Rockies...

...Above-normal temperatures are expected from the northern Intermountain
West into the northern and central Plains, while much of the East begins
to cool down through late in the week...

A slow-moving surface front currently extends from the Mid-Atlantic
region, back through the Ohio Valley, and into the lower Mississippi
Valley and southern Plains.  As the front continues to sag slowly south
through the evening, very moist air ahead of the front will support
showers and thunderstorms capable of producing heavy rainfall.  This
potential for heavy rainfall includes areas in the Ohio Valley and central
Appalachians that have been recently impacted by very heavy rainfall
amounts and flooding.  Flood Watches have been posted and are expected to
remain in effect into this evening for areas stretching from central
Kentucky and eastern Tennessee into the Mid-Atlantic region.  Showers and
storms are forecast to continue across parts of the region into tomorrow
before a secondary cold front sweeps across the region by late in the
week.  In addition to drier weather, this front is expected to bring
seasonal to below-average temperatures into much of the eastern-third of
the Lower 48 by Friday.

However, it is expected to remain moist and unsettled along the Gulf Coast
over the next week days.  Ample moisture and weak winds are expected to
support slow-moving storms capable of producing heavy rain.  The threat is
forecast to continue through late in the week as the front settling in
from the north stalls across the region.

In the West, southerly winds sandwiched between low pressure positioned
off of the Pacific Northwest coast and high pressure anchored over the
Rockies and High Plains will support ample moisture spreading north from
the Southwest into portions of the Great Basin and Rockies.  This will
fuel daily shower and thunderstorm activity and the potential for
localized flooding.

Above-normal temperatures are forecast to persist from the northern
Intermountain West and northern Rockies, while the heat also builds east
out across the northern and central Plains through Friday.

Pereira

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