Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
430 PM EDT Mon Oct 24 2022

Valid 00Z Tue Oct 25 2022 - 00Z Thu Oct 27 2022

...Strong low pressure system exiting into southern Canada with the threat
of wintry weather and strong winds gradually diminishing across the
northern Plains...

...Another low pressure system rapidly developing over the southern Plains
will bring a quick round of heavy rain across the central U.S. along with
severe thunderstorms across the Deep South...

...Rain lingers over the Northeast as unsettled weather continues across
the Pacific Northwest...


A strong low pressure system currently bringing the first widespread
wintry weather of the season across the northern High Plains is moving
farther away into southern Canada.  The associated wintry weather and
strong gusty winds over the northern High Plains are expected to gradually
diminish tonight.  Behind the strong system, cold air is surging all the
way down the western U.S. and into northern Mexico.  Meanwhile, higher
level moisture associated with former Hurricane Roslyn from the eastern
Pacific is interacting with the trailing cold front associated with the
deep cyclone exiting into southern Canada.  This interaction is currently
spawning a new low pressure system over the southern Plains.  Rain and
thunderstorms associated with the trailing front are expected to bring a
threat of heavy rain and severe thunderstorms over the mid-section of the
country through tonight.  Meanwhile, moderate to heavy rain associated
with the new low pressure system is forecast to expand east and
northeastward from the southern Plains through tonight, toward the
Mid-Mississippi Valley on Tuesday, and into the Midwest Tuesday night. 
The greatest threat for the thunderstorms to become severe will be farther
south across eastern Texas and the Deep South ahead of a potent cold
front.  By Wednesday, the low pressure system is forecast to gradually
weaken as it tracks farther northeast toward the lower Great Lakes where
showers and thunderstorms are expected to become less heavy.

A slow-moving front hovering just off the East Coast continues to bring
damp, cloudy and rainy weather from the Mid-Atlantic coast northward into
New England.  Slow improvement in the weather can be expected farther
south in the Mid-Atlantic as the front is forecast to slowly dissipate. 
However, rainy conditions are expected to linger into Wednesday over New
England as another low pressure system with some tropical characteristics 
currently near Bermuda is forecast to move northward and pass east of 
Cape Cod on Wednesday.

Meanwhile, a series of low pressure and associated frontal systems from
the northeastern Pacific will deliver unsettled weather into the Pacific
Northwest toward the northern and central Rockies during the next couple
of days.  Periods of mountain snow and lower elevation rain can be
expected into Wednesday for these areas.  Over a foot of snow can be
expected across the northern Cascades.  6 to 12 inches of snow is forecast
for much of the high elevations of the northern Rockies.

Kong


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