Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
244 AM EST Sat Mar 04 2023

Valid 12Z Sat Mar 04 2023 - 12Z Mon Mar 06 2023

...Heavy snow to continue across interior Northeast and northern New
England through Saturday afternoon...

...Above-average temperatures for most locations east of the Rocky
Mountains this weekend while the West remains cool and unsettled...

...Heavy mountain snows to return to the West Coast on Saturday before
spreading eastward to the Intermountain West on Sunday...

A potent storm system will continue to track across the Northeast during
the early Saturday morning hours, with heavy snow, mixed precipitation,
rain, and strong winds impacting a large swath of the region through the
afternoon. After breaking several all-time low-pressure records throughout
the Ohio and Tennessee Valleys, the low will continue weakening as it
moves through the interior Northeast, as a secondary, coastal low develops
and tracks along the East Coast on Saturday. In the meantime, heavy snow
will continue across Upstate New York and New England, with an additional
3-6" possible in interior areas before the snow lightens or changes to
mixed precipitation as warm air surges northward. Further east, in coastal
sections of New England, snowfall rates will intensify as the secondary
low deepens, with 8-12" of snow forecast across southern Maine and New
Hampshire through Saturday afternoon. Areas further south, including
central Massachusetts and the Boston metro area, will remain near or along
the rain/snow line for much of the event, with mixed precipitation
expected through the early Saturday morning hours. In the wake of the
system, strong winds will impact much of the Mid-Atlantic and Ohio Valley
over the next 12 hours before subsiding late Saturday as the system tracks
offshore, resulting in widespread Wind Advisories and localized High Wind
Warnings across the region.

As the Northeast clears out, temperatures throughout the eastern half of
the country will remain unseasonably warm through Monday, with high
temperatures approaching 10-20 degrees F above average across the central
and southern Plains on Saturday and Sunday. Conversely, temperatures will
remain unseasonably cold in the western region as persistent upper-level
troughing continues to promote cool and unsettled weather.

The next West Coast storm system will track southward across the Pacific
Northwest and California on Saturday, producing moderate to heavy
precipitation along coastal portions of the region, with heavy snow
possible in the higher terrains of the Sierra Nevada and Cascade ranges.
An additional several feet of snow will be possible in these areas, with
the heaviest of these totals likely in the northern Sierra Range. On
Sunday, precipitation will spread inland, with heavy snow possible in the
higher terrains of the Intermountain West. The system will then track
eastward, with a deepening surface low developing in the lee of the
Rockies, before moving northeastward through the northern Plains. Warm,
moist air surging northward behind a lifting warm front will lead to
showers across the Corn Belt, with light to moderate snow possible on the
northern fringe of the precipitation shield late Sunday into the early
Monday morning hours.


Russell


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