109
FXUS01 KWBC 072011
PMDSPD

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
400 PM EDT Sun Sep 07 2025

Valid 00Z Mon Sep 08 2025 - 00Z Wed Sep 10 2025

...Showers and thunderstorms linger across the Florida Peninsular
to along parts of the immediate coast of the southeastern U.S....

...There are Air Quality Alerts over parts of the interior Pacific
Northwest...

...Much below normal temperatures across the eastern half of the
country with Frost Advisories and Freeze Warnings over parts of
the Upper Midwest, Michigan, and Pennsylvania Monday morning...

A large high pressure system from Canada will settle and dominate
the weather pattern across much of the central and eastern U.S.
This high pressure system will bring another refreshingly cool air
mass for much of the eastern half of the country through the next
couple of days.  In fact, parts of the upper Midwest, Great Lakes,
and Pennsylvania can expect the first frost of the season Monday
morning.  In addition, temperatures falling into the 40s and 50s
will challenge some for the record low temperatures across the
Tennessee Valley and a few locations in the Great Lakes and the
Northeast Monday morning.

While fine weather will prevail from much of eastern U.S. to the
Mid-South, a stationary front on the southern edge of the high
pressure system will be associated with inclement weather across
the Sunshine State to the immediate coast of the southeastern U.S.
 Scattered thunderstorms will be the rule across Florida, with
late afternoon into the evening being the time when these
thunderstorms will be most active daily.  In addition, a low
pressure center lingering over the eastern Gulf could spin some
stronger thunderstorms with gusty winds toward the west coast of
Florida Peninsula from time to time.  Some thunderstorms can also
develop near/along the coast of the southeast U.S. through the
next couple of days but the heaviest rainfall is expected the fall
offshore closer to the stationary front.  Nevertheless, any rain
that does fall can contain heavy downpours which could lead to
local flooding issues.

On the backside of the large high pressure system, a frontal
system with a couple of low pressure waves will bring scattered
thunderstorms at times across the central to southern Plains for
the next couple of days, and a round of rain with embedded
thunderstorms across the upper Midwest to the upper Great Lakes
Monday to Tuesday.  Warmer than normal conditions are expected to
spread from the northern Rockies into the northern Plains into
Monday, and then farther south into the southern High Plains by
Tuesday.

Meanwhile, upper-level troughing and a low pressure system moving
toward the West Coast through Tuesday will bring a round of rain
into the Pacific Northwest by tonight.  The rain will then extend
into parts of the northern Rockies by Tuesday.  The prevalence of
clouds and rain will keep temperature below normal.  Furthermore,
smoke from wildfires has prompted Air Quality Alerts over parts of
the interior Pacific Northwest.  The Southwest will be high and
dry with high temperatures only into the 100s, which are slightly
cooler than normal for this time of year.

Kong


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