Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
354 PM EDT Sun May 28 2017
Valid 00Z Mon May 29 2017 - 00Z Wed May 31 2017
...A lingering upper-level low will keep cool and showery conditions from
the northern Plains eastward to New England...
...Scattered showers and thunderstorms continue along the East Coast as
well as over the Deep South where heavy downpours are possible...
...Hot conditions expected for the interior Pacific Northwest and the
A large upper-level low is forecast to deepen and move slowly eastward
across the Great Lakes over the next couple days. This will keep
temperatures below normal from much of the Great Plains eastward across
the Mississippi Valley, the Great Lakes, and into New England. The large
cyclonic circulation will rotate small-scale disturbances into the
northern U.S., resulting in occasional showers and isolated thunderstorms,
especially during the afternoon and early evening hours through Tuesday.
Meanwhile, the main front associated with this system should gradually
push eastward into the Eastern Seaboard on Memorial Day and becomes nearly
stationary across the mid-Atlantic on Tuesday. This will keep a good
chance of showers and thunderstorms up and down the East Coast through
Tuesday. The truly warm and humid air will remain south of the front over
the Southeast and across the Deep South through Tuesday, where clusters of
thunderstorms can be expected. Some of these thunderstorms could be heavy
enough to result in flash flooding just inland from the western Gulf Coast
Meanwhile, a high pressure system similar to one in the cold seasons is
forecast to build southward from western Canada into the northern High
Plains. This will send another batch of cool Canadian air into the area
during the next couple of days. In contrast, a brief heat wave is
forecast for the interior Pacific Northwest through Tuesday as high
temperatures are expected to reach low to mid 90's over the Snake River
Valley. Meanwhile, triple-digit heat is expected for the Desert Southwest
due to the influence of an upper-level ridge.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php