Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
224 PM EDT Sat Apr 20 2019

Valid 00Z Sun Apr 21 2019 - 00Z Tue Apr 23 2019

...Much colder tomorrow across Wyoming into the High Plains ...

...Cold front to move into the central Rockies tonight with some snow but
mostly rain...

The eastern system responsible for the heavy rainfall will slowly move out
to sea tonight, but a trailing trough will organize in its wake along the
coast and lift into southeastern New England late Sunday/early Monday.
This will maintain the threat of mainly light showers for the Northeast
but gradually diminish the coverage across the central Appalachians in the
wrap-around area behind the surface low. Temperatures will cool along/east
of the Appalachians tomorrow after with highs still 5-15 degrees below
average from the Mason-Dixon line southward.

The middle of the country will be in between systems with a slowly moving
cold front and eventual stationary boundary settling across the Upper
Midwest with mainly light showers in its audience. Much colder
temperatures will follow in its wake through Wyoming into South Dakota and
Nebraska tomorrow (20-30 degrees colder than today) with several inches of
snow possible through the higher terrain of WY/CO. Temperatures will
struggle to reach out of the 40s for many places while east/south of the
front temperatures tomorrow will push into the 70s/80s. Cold front will
continue to push through Utah/Colorado tomorrow with lowering snow levels
but expect mainly rain for most areas with possible thunderstorms.
Tail-end of the cold front moving through California will be accompanied
by little in the way of showers, but will bring in cooler temperatures to
the deserts (about 10 degrees cooler on Sunday than Saturday).


Fracasso


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