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FXUS01 KWBC 032028

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
427 PM EDT Fri Jul 03 2020

Valid 00Z Sat Jul 04 2020 - 00Z Mon Jul 06 2020

...Severe thunderstorms possible over the northern Plains during
the Fourth of July weekend...

...Scattered thunderstorms expected to linger over the eastern
Gulf Coast to the lower Mississippi Valley...

...Summer heat continues across the northern Tier states; cool and
damp over New England but dry in the West for the Fourth of July

A somewhat sluggish weather pattern across the U.S. will tend to
keep similar weather conditions at any particular location during
the Fourth of July weekend.  Starting out over the Pacific
Northwest, cooler than normal temperatures will stay entrenched as
troughing maintains an onshore flow.  In contrast, a high pressure
system will sustain high temperatures into the 90s from the upper
Midwest across the Great Lakes and into the Mid-Atlantic,
especially for the coastal plains and urban areas.  Meanwhile, a
back-door cold front will bring in cool temperatures  into New
England with highs only in the 70s near the coast.  Scattered
showers and thunderstorms are expected to taper off on Saturday
but some thunderstorms are forecast to develop over northern New
England on Sunday as another cold front arrives.  Meanwhile,
Florida may see another day with near-record heat in the mid-90s.

A good chance of scattered showers and thunderstorms is expected
near and along a stationary frontal boundary from the Mid-South to
the eastern half of the Gulf Coast region, with some potential for
flash flooding due to some localized heavy rain totals.  In the
north-central U.S., a front will promote some rain and
thunderstorms (some severe) as well as some flash flooding in
areas that see heavier rain.  On the southern part of the western
upper-level trough, southwesterly flow ahead of a front will lead
to gusty winds and low humidity in the Central Great Basin where
fire danger is elevated.

A fair amount of the Saharan dust continues to linger across the
Gulf Coast region into Florida.  The sluggish weather pattern will
make it difficult for the dust to disperse during the Fourth of
July weekend. The primary impacts of the Saharan dust are hazy
skies during the day, locally reduced visibility, degraded air
quality, and the potential for vividly colorful sunrises and


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