Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
330 AM EDT Fri Apr 19 2019
Valid 12Z Fri Apr 19 2019 - 12Z Sun Apr 21 2019
...Severe thunderstorms and heavy to excessive rainfall possible across
the East on Friday...
...Record to near record warm overnight temperatures likely across much of
the East and parts of the West Friday and Saturday mornings...
An anomalous upper level system lifting from the lower Mississippi Valley
into the Ohio Valley/Mid-Atlantic this weekend will drive a cold front
through the Eastern U.S. Widespread showers and storms are expected along
and ahead of the front bringing the potential for heavy rainfall and
strong to severe thunderstorms. The greatest threat for severe weather
(mainly damaging winds and isolated tornadoes) will be across parts of the
Carolinas and Southern Mid-Atlantic where the Storm Prediction Center has
a moderate risk posted for Friday. A slight to enhanced risk exists across
the rest of the Mid-Atlantic and the Southeast. Meanwhile, WPC highlights
parts of the Mid-Atlantic (Friday) and the Northeast (on Saturday) within
a slight risk for excessive rainfall, and flash flood watches are in
effect across these regions as well. While the cold front should clear the
East Coast by the weekend, heavy rainfall may continue through Saturday
across New England along the attendant warm front.
Ahead of the approaching cold front on Friday, temperatures will be near
to above average, with widespread record high minimum (overnight)
temperatures expected this morning for much of the Eastern states, and
again Saturday morning across the Northeast. Behind the front, daytime
highs across the Tennessee and Ohio Valleys could be 10 to 20 degrees
below average into the weekend.
Out West, a cold front moving into the Pacific Northwest this morning will
drop southward into the Great Basin and the Northern Rockies by Saturday.
Expect light to moderate precipitation to accompany this front, with only
minor snow accumulations expected in the highest elevations. Ahead of this
front, strong upper level ridging will result in well above average
temperatures across much of the West on Friday, with a handful of record
warm overnight temperatures possible for some locations. The Pacific
Northwest should cool behind the front, with the warm weather shifting
eastward into the Central U.S. on Saturday where afternoon highs in the
upper-70s to mid-80s across parts of the Central and Northern Plains would
be as much as 10 to 20 degrees above average.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php