…There is a Slight Risk of excessive rainfall over parts of the
Central/Southern Plains and Middle /Lower Mississippi Valley on Thursday…
…There is a Slight Risk of severe thunderstorms over parts of the
Central/Southern High Plains on Wednesday…
On Wednesday, a front extending from the Upper Mississippi Valley to the
Central Plains/Central Rockies will move eastward to the Northeast,
westward to the Middle Mississippi Valley, and southwestward into the
Southern Plains by Friday morning. In addition, moisture streams
northward over the Central/Southern Plains, intersecting the boundary over
the Central Plains as a dryline develops over the Southern High Plains.
Showers and severe thunderstorms will develop over the Southern High
Plains east of the dryline. Therefore, the SPC has issued a Slight Risk
(level 2/5) of severe thunderstorms over parts of the Southern/Central
High Plains through Thursday morning. The hazards associated with these
thunderstorms are frequent lightning, severe thunderstorm wind gusts,
hail, and a few tornadoes. Moreover, severe thunderstorm wind gusts and
hail will be the primary threat over parts of the Central Plains, Middle
Mississippi Valley, into the Great Lakes.
Furthermore, a second front over the southern Mid-Atlantic westward to the
Lower Mississippi Valley will linger over the area for the next two days.
The two boundaries will produce showers and thunderstorms with moderate to
heavy rain over parts of the Central/Southern Plains Lower Mississippi
Valley into the Southeast and southern Mid-Atlantic. Therefore, the WPC
has issued a Marginal Risk (level 1/4) of excessive rainfall over parts of
the Central/Southern Plains Lower Mississippi Valley into the Southeast
and southern Mid-Atlantic through Thursday morning. The associated heavy
rain will create localized areas of flash flooding, affecting areas that
experience rapid runoff with heavy rain.
On Thursday, strong to severe thunderstorms will develop eastward of the
dryline over the Central/Southern High Plains. Therefore, the SPC has
issued a Marginal Risk (level 1/5) of severe thunderstorms over parts of
the Central/Southern High Plains from Thursday through Friday morning. The
hazards associated with these thunderstorms are frequent lightning, severe
thunderstorm wind gusts, hail, and an isolated threat of tornadoes. In
addition, showers and thunderstorms will develop along the southeastern
boundary from the southern Mid-Atlantic/Southeast to the Middle/Lower
Mississippi Valley/Central Gulf Coast.
Moreover, showers and thunderstorms will produce heavy rain over parts of
the Central/Southern Plains and Middle /Lower Mississippi Valley.
Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive
rainfall over parts of the Central/Southern Plains and Middle /Lower
Mississippi Valley from Thursday through Friday morning. The associated
heavy rain will create mainly localized areas of flash flooding, with
urban areas, roads, small streams, and low-lying areas the most
vulnerable. Furthermore, rain and showers/thunderstorms will develop from
the Northeast to the Ohio as the front moves eastward into the Northeast.
Meanwhile, upper-level energy over the Northern Rockies into the
North/Central Plains will trigger rain and highest-elevation snow over
parts of the Northern Intermountain Region, eastern Great Basin, and
Northern Rockies on Wednesday. The energy moves eastward on Thursday,
producing rain over parts of the Northern/Central Plains and Upper/Middle
Mississippi Valley. Scattered rain and highest elevations now will develop
over parts of the Northern Rockies on Thursday. Lastly, upper-level
dynamics will trigger light rain over parts of the Pacific Northwest and
Northern California on Thursday evening into Friday morning.
Ziegenfelder
Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php
