…An Atmospheric River will bring heavy, low elevation rain and high
elevation mountain snow to the Pacific Northwest and northern California
beginning Tuesday evening…
…Lingering precipitation chances for the Northeast and Carolinas Monday
with some locally heavier rainfall along the Lower Mississippi/Tennessee
Valley areas…
…Above average temperatures continue for much of the country, more
seasonable temperatures for the Northeast and the West on Tuesday…
A deep upper-level trough will bring a substantial plume of Pacific
moisture to the Northwest U.S. beginning Tuesday evening. This atmospheric
river event will produce low elevation rainfall along with high elevation
heavy snowfall throughout the day on Wednesday. Between 1-3 feet of snow
can be expected over the highest elevations of the Cascades while between
1-2 feet of snow are possible for parts of the Northern/Central Rockies by
Wednesday evening.
Some light precipitation may occur from the Lower Great Lakes into the
Northeast through Tuesday morning. Light rain is probable out ahead of a
cold front moving through the Northeast tonight before transitioning into
post-frontal light mixed precipitation early Tuesday morning when
temperatures bottom out in the 20s and winds begin to blow out of the
northwest. Mid-level troughing above a low pressure system moving through
the Mississippi Valley will support return flow of moisture from the Gulf
of Mexico leading to showers and thunderstorm activity across the
Mississippi Valley and Midwest/Southeast on Wednesday and Thursday. Some
pockets of heavy rainfall are possible over the Lower
Mississippi/Tennessee Valley on Wednesday.
Temperatures are likely to remain above average across much of the Central
and Southern U.S. this week. Cold fronts moving through the East and West
will support below average temperatures over the next couple of days.
Kebede
Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php
