Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
335 AM EDT Sun Sep 26 2021

Valid 12Z Sun Sep 26 2021 - 12Z Tue Sep 28 2021

...Additional rounds of showers and thunderstorms may produce isolated
instances of flash flooding across portions of Maine and the Southwest...

...Unsettled weather found across the Pacific Northwest and northern Great
Basin...

...Dry and unseasonably warm throughout the Great Plains and Midwest...

A tranquil end of the weekend and start of a new week is on the way for
the majority of nation, with precipiation chances confined to only a few
sections of the country. Starting in the east, one more day of heavy rain
chances will be found across Maine as a low pressure system passes by to
the east. The primary concern with these showers and thunderstorms will be
the potential for downpours and isolated flash flooding. Additional
scattered showers are possible across New England on Monday as the next
cold front enters the region. Meanwhile, an upper-level low lifting into
the Desert Southwest will be responsible for thunderstorm chances over the
next couple of days across Arizona, New Mexico, and the Four Corners
region. A few severe thunderstorms are not out of the question today
across southern Arizona and southwestern New Mexico, with isolated flash
flood concerns found throughout much of the Southwest and Four Corners
through Tuesday morning.

Elsewhere, a potent storm system and associated cold front are forecast to
deliver damp and dreary weather to the Pacific Northwest today and
eventually make it into the northern Great Basin by Monday evening.
Overall rainfall amounts of 1 to 2 inches can be expected across western
Oregon and Washington, with higher amounts found in the Olympic and
Cascade mountains. Gusty winds ahead of the cold front could produce
elevated to critical fire weather across the northern and central Great
Basin today and Monday. Red Flag Warnings and Fire Weather Watches have
been issued across parts of southern Oregon, northwest Nevada and the
northern/central Sierra Nevada.

Autumn is taking an early vacation throughout the central U.S. over the
next couple of days as high temperatures soar well above average.
Widespread highs into the upper 80s and low 90s will be found throughout
the Great Plains and parts of the Midwest under a building upper-level
ridge. This equates to around 10 to 20 degrees above average. Combined
with the warm temperatures, low relative humidity and gusty winds could
lead to critical fire weather across part of the central and southern
Plains. In order to highlight the concern, Red Flag Warnings have been
issued for parts of south-central Kansas and north-central Oklahoma.

Snell


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