Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
257 AM EST Sun Jan 21 2018
Valid 12Z Sun Jan 21 2018 - 12Z Tue Jan 23 2018
...Heavy snow and freezing rain possible from the Central Plains to the
Upper Midwest, Great Lakes and New England...
...Heavy snow possible over the Cascades and the Rockies...
...Heavy rain possible over parts of the Pacific Northwest and Northern
A front passing through the Central and Southern Rockies today will
quickly develop into a robust winter storm system tonight/early Monday as
it moves out into the Central and Southern Plains. Warm, Gulf moisture
drawn northward into this system will help produce widespread snow from
the Northern/Central Rockies to the Upper Mississippi Valley and east to
the Great Lakes region and New England by Tuesday. Snow will likely be
heavy at times, especially along a swath from Nebraska to Wisconsin. Along
and near the front itself, a relatively narrow band of freezing rain is
expected to develop. Both types of precipitation will likely have a
significant impact to transportation through at least Tuesday. Much of
Wyoming, Colorado, northwest Kansas, Nebraska, southern South Dakota,
Iowa, southern Minnesota and northern Wisconsin have Winter Weather
Advisories, Winter Storm Warnings or Winter Storm Watches in effect.
Showers and thunderstorms are expected along and ahead of the trailing
cold front as it moves eastward through the central U.S. Periods of heavy
rain will be possible across the South, especially near the Ozarks of
Arkansas and Missouri. The risk for flash flooding may become elevated in
that region through Monday morning. Rain will spread to the eastern
Tennessee and Ohio Valleys and the Mid-Atlantic Monday and Tuesday.
The Pacific Northwest and northern California will remain in an
increasingly wet pattern over the next few days as upper-level energy
moves inland. Rain and higher elevation snow will spread from much of the
Pacific Northwest and northern California to the Northern Rockies today-
expanding into parts of the Great Basin by Monday. Heavy snow is forecast
for the Cascades, as well as, portions of the Northern and Central
Rockies. Winter Storm Warnings and Winter Weather Advisories are in effect
from north-central Washington to northern California.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php