Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
259 PM EST Sat Jan 25 2020
Valid 00Z Sun Jan 26 2020 - 00Z Tue Jan 28 2020
...Rain and snow for the Great Lakes to Northeast through the weekend...
...Persistent periods of precipitation for the Pacific Northwest...
An occluded low pressure system is forecast to move northeastward across
the Great Lakes region and Northeast, then into southeastern Canada late
Sunday. This will bring continued rain across coastal New England through
Saturday night, some of which could be locally heavy. Across the interior
Northeast and the Great Lakes, a mix of rain and snow is expected through
Sunday evening. Light snow is possible for the Central Appalachians as
well. Then on the backside of the low, lake enhancement of snowfall could
lead to snow amounts locally over 6 inches downwind of the Lower Great
Lakes through Monday. Freezing rain is also a threat for northern Maine,
where over a tenth of an inch of ice could accumulate.
A series of upper-level disturbances and surface fronts will push through
the Northwest over the next couple of days, leading to continued rounds of
precipitation there. Lower elevation rain (which could be locally heavy)
and higher elevation snow are forecast, with snowfall amounts in the
Cascades well over a foot. One frontal system should continue across the
Great Basin toward the Rockies Sunday night, spreading snow with it. 6 to
12 inches of snow is forecast for the highest elevations of the Northern
Rockies and Wind River Mountains, with light snow into the Intermountain
West and Central Rockies through Monday.
Elsewhere, the Southern Plains to Lower Mississippi Valley can expect
showers and localized thunderstorms through Sunday morning, spreading
eastward to the Southeast and Tennessee Valley by Sunday and Monday as a
low pressure system moves across the Gulf of Mexico. There is also a
possibility of wintry weather in the high elevations of the
Southern/Central Appalachians by Monday morning.
Temperature-wise, warmer than average conditions can be expected most
everywhere, with the largest warm anomalies at 15 to 25 degrees above
average for lows across the north-central U.S. to the Northeast. Florida
is one exception, where morning lows could be cool Sunday morning, but
temperatures rebound by Monday.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php