Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
227 PM EST Sat Nov 20 2021

Valid 00Z Sun Nov 21 2021 - 00Z Tue Nov 23 2021

...Heavy rain and isolated instances of flash flooding possible across
portions of eastern Florida through Sunday...

...Elevated to critical fire weather located across Southern California
this weekend...

...Widespread shower activity to be found across the eastern third of the
country on Sunday and Monday thanks to a sweeping cold front, with lake
effect snow possible in its wake...

A fairly tranquil weather pattern is in place across the Nation this
weekend, with hazardous weather confined to localized regions. A gradually
weakening stationary front currently located across southern Florida will
continue to be the focus for isolated downpours, particularly throughout
eastern portions of the Sunshine State. A few thunderstorms could linger
long enough to create isolated flooding concerns. Rough surf along the
Atlantic Coast of Florida may also lead to numerous rip currents.

Meanwhile, along the West Coast, elevated to critical fire weather is in
place for Southern California this weekend as gusty offshore winds
strengthen on Sunday and interact with low relative humidity. This Santa
Ana wind event has also prompted Red Flag Warnings to be issued throughout
the region.

For the eastern half of the Nation, the biggest weather-maker will be
associated with a sweeping cold front and strengthening low pressure
system over southeast Canada. This cold front will help fuel widespread
shower activity on Sunday from southeast Texas to the Lower Great Lakes,
with much of the precipitation spreading into the Northeast and
Mid-Atlantic on Monday. Behind the cold front, lake effect snow is
possible across the Upper Great Lakes beginning Sunday evening and
eventually the Lower Great Lakes by Monday. Eastern sections of the Upper
Peninsula of Michigan could see snowfall accumulations over six inches,
with much lighter snowfall amounts elsewhere.

Temperature-wise, the aforementioned cold front will spread much below
average temperatures into the Midwest, Ohio and Tennessee valleys by
Monday. Simultaneously, a warm-up will commence by the beginning of the
weekend throughout the Plains, with highs reaching into the 50s and 60s.

Snell

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