Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
300 AM EST Sat Feb 27 2021
Valid 12Z Sat Feb 27 2021 - 12Z Mon Mar 01 2021
...Widespread rain and thunderstorms could cause flooding across portions
of the Lower/Middle Mississippi, Tennessee, and Ohio Valleys to the
Central Appalachians through the weekend...
...Snow in the Northwest and the Northeast should wind down today, but a
round of light to moderate snow is possible in the north-central CONUS...
Multiple rounds of showers and thunderstorms are possible over the next
few days across portions of the central and eastern U.S. near meandering
frontal boundaries and as moisture streams in from the Gulf of Mexico. In
particular, through Sunday night, rainfall of 1 to 3 inches with locally
higher amounts is likely stretching from parts of the Lower/Middle
Mississippi Valley into the Tennessee and Ohio Valleys and the
Central/Southern Appalachians. This rain will lead to flooding and flash
flooding concerns, especially where rain falls on already wet ground from
previous and ongoing rainfall. Slight Risks of excessive rainfall are in
place through the weekend for these areas, along with Flood Watches in the
Lower Ohio Valley to Central Appalachians. Additionally, the Storm
Prediction Center has outlooked Marginal Risks of severe weather for the
next couple of days, given that storms could be strong to severe.
After a snowy couple of days particularly in higher elevations of the
Northwest, snow is forecast to wind down there by this afternoon. However,
as the system moves east, some snow or mixed precipitation is forecast to
affect the Northern/Central Plains and make its way into the Upper Midwest
and Upper Great Lakes region tonight. A swath of snow around 3 to 6 inches
is possible, along with a light glaze of freezing rain just to the south
of the snow axis in the Upper Midwest. In the Northeast, some snow and
light freezing rain is expected today, with snow amounts of 4 to 8 inches
in portions of Maine, where there are Winter Weather Advisories in effect.
Another round of light snow could spread into the interior Northeast by
Elsewhere, fire weather is a concern across portions of the Southern High
Plains today, and Red Flag Warnings are in place there. Gusty winds are
possible in the southwestern U.S. and parts of California in particular,
so scattered Wind Advisories and High Wind Watches are in effect.
In terms of temperatures, cooler than normal temperatures will persist in
the Great Basin and Rockies through the weekend, dropping southeastward
into the Desert Southwest and central/southern portions of the High Plains
Sunday as a cold front pushes through. Meanwhile, above normal
temperatures are likely for the eastern half of the country this weekend.
Highs of 10 to 20 degrees above average will be common, with low
temperatures even milder, as warm moist air comes into the Southeast from
the Gulf. Daily record high maximum and minimum temperatures could be set
in the Gulf Coast states and toward the Southern Appalachians.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php