Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
256 PM EST Fri Feb 23 2018
Valid 00Z Sat Feb 24 2018 - 00Z Mon Feb 26 2018
...Active weather pattern continues with heavy rain across the Plains and
Ohio Valley and snow for parts of the Midwest...
The main weather story making weather headlines for the weekend will be
the continued heavy rainfall and strong thunderstorms from the southern
Plains to the Ohio Valley. This is in association with a nearly
stationary front that is intercepting copious amounts of deep moisture
from the Gulf of Mexico and leading to multiple rounds of heavy rain over
already saturated soils from eastern Texas to the Ohio Valley. A strong
low pressure system will develop over the central Plains and then track
towards the Midwest and Great Lakes, providing another round of heavy
rain. Severe thunderstorms will also be possible in the warm sector of
this low pressure system from the central Gulf Coast to southern Indiana.
A high risk of excessive rainfall is expected on Saturday from Arkansas to
Kentucky with the potential for several inches of rain by Sunday morning.
Flash flood watches are also in effect.
Much of the West will remain in a cold and unsettled pattern through the
weekend courtesy of multiple shortwaves dropping south and reinforcing the
broad upper level trough of low pressure. Widespread snow is expected for
the Cascades and northern Rockies. Another swath of accumulating snow is
in the forecast from Nebraska to northern Michigan on the northwest side
of the developing central U.S. surface low. The cold airmass in place
over the region will keep afternoon highs generally 10 to 20 degrees
cooler than average for late February. The opposite will be the case for
the Deep South and extending eastward to the Carolinas and Florida, with
widespread highs in the mid 70s to mid 80s with additional record highs
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php