Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
349 PM EDT Wed Mar 20 2019

Valid 00Z Thu Mar 21 2019 - 00Z Sat Mar 23 2019

...Major to historic river flooding will continue across parts of the
Mississippi and Missouri River Basins with areal flooding a threat across
parts of the Northwest and Northern Rockies as well...

...A developing coastal storm will bring unsettled weather to the
Mid-Atlantic and Northeast through the end of the week...

...Heavy snow is possible across the mountains of central Utah and
southwest Colorado Thursday and Friday...

Despite dry weather, major to historic and catastrophic flooding will
continue across parts of the Missouri and Mississippi River Basins due to
rapid snowmelt as a result of heavy rainfall last week. Flood warnings and
advisories remain in effect for parts of the region. Areal flooding is
also a concern across parts of the Northwest and Northern Rockies/High
Plains as warm temperatures this week are leading to accelerated snowmelt
and the potential for ice jams.

The main sensible weather threat in the short range will be with a
developing coastal low pressure system off the Carolina coasts Wednesday
evening, tracking up the East Coast through the end of this week. Moderate
to locally heavy rainfall is likely across the Mid-Atlantic states on
Thursday, shifting northward into the Northeast by early Friday. The
potential for accumulating snowfall exists across portions of the interior
Northeast and Northern New England through the start of this weekend.
Meanwhile, a couple of weak fronts moving through the Midwest will allow
for mainly light rain from the Mid-Mississippi Valley to the Ohio Valley
Thursday and Friday, with some light snows also possible across the Upper
Great Lakes.

An occluded/cold front moving through California this afternoon and into
the Southwest states by Thursday will bring increased chances for rain and
mountain snows to California, the Central Great Basin, and into the
Southwest/Four Corners region. Snowfall totals over a foot are possible
across the higher elevations of Utah and southwest Colorado. Another cold
front will enter the West Coast and Pacific Northwest by late Friday and
bring another round of rain and mountain snow.

Happy Vernal Equinox!

Snell

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