…Severe Weather and Flash Flooding risks shift into the
Ohio/Tennessee/Mississippi Valleys today, followed by the East Coast on
Wednesday…
…Above average temperatures across southern tier states; below average
temperatures across the northern tier…
A strong low pressure system will spread scattered showers and
thunderstorms across the Mississippi Valley today, then the Ohio
Valley/East Coast on Wednesday. There’s an Enhanced Risk (level 3/5) of
Severe Thunderstorms for portions of the Mid/Deep South to Tennessee
Valley and Cumberland Plateau, according to the Storm Prediction Center.
Multiple rounds of severe storms capable of producing some strong
tornadoes, scattered to widespread wind damage and large to isolated
significant severe hail will be possible. A broad Slight Risk (at least
15%) of Excessive Rainfall is in effect for portions of the Midwest and
Ohio/Tennessee Valleys today as well. Moist soils in the
Mid-Altantic/Northeast will support a Marginal Risk (at least 5%) of Flash
Flooding on Wednesday when today’s storms move into the region. A more
unstable environment to the south will allow for increased thunderstorm
activity and the potential for isolated severe storms along the
Southeast/Mid-Atlantic Coast.
Upper troughing over southern Canada and the northern tier of the U.S.
will allow for a cooler airmass to park over the region through late this
week. High temperatures in the 40s and 50s will be 20-35 degrees below
average for parts of the Northern Plains and Upper Midwest today and
Wednesday. Meanwhile, a zonal and ridge-like pattern over the southern
tier will supply ample warm air into the region over the next few days.
Widespread high minimum temperature records may be tied or broken across
the Southeast and Southern California over the next couple of nights.
Elsewhere, some light snow is possible over the mountains of northwest
Wyoming today. Things dry out across the Northwest on Wednesday.
Kebede
Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php
