The Nation’s Weather

…Severe weather and heavy rain threat migrates into the Heartland today;
rainy in the Northeast…

…Above average temperatures across southern tier states and West;
unusually cool weather persists from Northern Plains to
Northeast/Mid-Atlantic…

A relatively stagnant upper pattern with troughing along the coasts and
ridging over the Central U.S. will persist through the end of the week,
with cool and rainy weather forecast from the Ohio Valley to the
Northeast/Mid-Atlantic. Along the trailing end of the front, isolated to
scattered severe storms (some of which could produce intense hail and
wind) and heavy rainfall remain possible in the Southern Plains today.
Looking ahead through the first half of Memorial Day weekend (Saturday
evening), the threat of scattered severe and excessive rainfall is
expected to focus across this portion of the front as it slowly lifts into
the Ozarks and Central High Plains while a dryline sharpens.

Storms aside, the aforementioned upper-troughing over Great Lakes and
Northeast will facilitate cooler temperatures across the Northern Plains,
Midwest, Northeast and Mid-Atlantic through Saturday. High temperatures in
the 40s, 50s and low 60s will represent temperature anomalies between
20-35 degrees below average. Widespread low daily max temperature records
may be tied or broken from the Ohio Valley to the Northeast/Mid-Atlantic
today and tomorrow. In stark contrast to the cool conditions over the
Northeast, warm weather (daytime highs 10-15 degrees above average) will
continue across the Southern and Western U.S. Over portions of South and
West Texas, daytime highs creeping into the triple digits may translate to
Moderate to locally Major HeatRisk impacts through Saturday.

Asherman/Kebede

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