Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
300 AM EST Tue Mar 01 2022

Valid 12Z Tue Mar 01 2022 - 12Z Thu Mar 03 2022

...Heavy precipitation across portions of the Pacific Northwest is
forecast to become less intense but will linger across the area through
midweek...

...Mountain snow and lower elevation rain will linger over northern
Rockies while rain and mountain snow linger across western Oregon...

...Above normal temperatures will expand eastward into the eastern U.S.
but cold conditions with periods of light snow remain across the northern
tier...

The Pacific moisture plume that recently resulted in heavy rain and snow
as well as Avalanche Warnings for portions of the Pacific Northwest into
the northern Rockies is expected to weaken slightly as it edges slowly
inland.  The threat of heavy precipitation is expected to lessen during
the next couple of days across the Pacific Northwest.  However, unsettled
weather is forecast to continue through midweek as the associated low
pressure system offshore will continue to direct moisture toward the
coast.  Meanwhile, a frontal boundary is forecast to slide slowly across
the Pacific Northwest to reach northern California by Wednesday night,
bringing rain and high elevation snow into the region.  The moisture plume
will also bring lingering snow farther inland across northern Idaho and
northwestern Montana for the next couple of days.  In addition, gusty
winds are expected to develop near the foothills of the northern Rockies. 
By Wednesday, a low pressure wave forming along an arctic front is
forecast to spread the snow eastward into the northern High Plains,
reaching into the Dakotas by Thursday morning.

Meanwhile, a couple of fast-moving low pressure systems forming along the
aforementioned arctic front are expected to bring a wintry mix across
portions of the northern Plains, Great Lakes and Northeast each day.  The
snow and ice are expected to be relatively light with these systems. 
Nevertheless, more than 6 inches of snow is forecast to fall across
portions of northern New York to northern New England over the next couple
of days.

Farther to the south, spring-like afternoon temperatures are in store. 
Daytime highs are forecast to climb 10-30 above normal across most places
from the central and southern Plains to the Mid Atlantic and Southeast
today and Wednesday, before an arctic air mass starts to surge south from
the Upper Midwest and Great Lakes later this week.  In contrast, dry
conditions and above-normal temperatures can be expected through midweek
from central and southern California through the central and southern
Rockies.


Kong/Pereira

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