…There is an Enhanced Risk of severe thunderstorms over parts of the
Central Plains on Thursday and the Central/Southern Plains on Saturday…
…There is a Slight Risk of severe thunderstorms over parts of the
Western Ohio Valley, Middle/Lower Mississippi Valley, and Southern Plains
on Friday…
…There is a Slight Risk of excessive rainfall over parts of the Southern
Plains/Lower Mississippi Valley and Tennessee/Ohio Valleys on Thursday…
… There are Heat Advisories over southern Texas…
On Thursday evening, a front extending from the Northern/Central Plains to
the Central Rockies will move eastward to the Lower Great Lakes/Ohio
Valley and westward to the Central High Plains by Saturday evening. As the
boundary moves across the Plains, showers and severe thunderstorms will
develop over parts of Nebraska and western Iowa. Therefore, the SPC has
issued an Enhanced Risk (level 3/5) of severe thunderstorms over parts of
the Central Plains/Middle Mississippi Valley through Friday morning. The
hazards associated with these thunderstorms are frequent lightning, severe
thunderstorm wind gusts, hail, and a few tornadoes. In addition, there
will be an added threat of severe thunderstorm wind gusts of 65 knots or
greater over the region.
Furthermore, there will be another region with a slight risk of severe
thunderstorms over parts of the rest of the Plains and parts of the
Middle/Lower Mississippi Valley. Therefore, the SPC has issued a Slight
Risk (level 2/5) of severe thunderstorms over parts of the
Northern/Central/Southern Plains and the Middle/Lower Mississippi Valley
through Friday morning. The hazards associated with these thunderstorms
are frequent lightning, severe thunderstorm wind gusts, hail, and a few
tornadoes. In addition, there is an increased threat of hail, two inches
or greater, over parts of the Northern/Central/Southern Plains.
Moreover, the showers and thunderstorms will cause heavy rain to develop
over parts of the Southern Plains and Lower Mississippi Valley. Therefore,
the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over
the Lower Mississippi Valley and Southern Plains 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.
Further, another front extending from Maine across the Northeast Coast to
the Mid-Atlantic, then westward to the Tennessee Valley, will get
reinforced by a third front moving across the Great Lakes by Friday
afternoon. The boundary will create two areas of severe thunderstorms over
Maine and parts of the Ohio/Tennessee Valleys. Therefore, the SPC has
issued a Slight Risk (level 2/5) of severe thunderstorms over two areas:
one over Maine and a second over the Ohio/Tennessee Valleys through Friday
morning. The hazards associated with these thunderstorms are frequent
lightning, severe thunderstorm wind gusts, hail, and a few tornadoes.
Moreover, some showers and thunderstorms will produce heavy rain over
parts of the Ohio/Tennessee Valleys. Therefore, the WPC has issued a
Slight Risk (level 2/4) of excessive rainfall over parts of the
Ohio/Tennessee Valleys 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.
On Friday, showers and severe thunderstorms will develop as the front over
the Plains moves onto the Mississippi Valley. Therefore, the SPC has
issued a Slight Risk (level 2/5) of severe thunderstorms over parts of the
Western Ohio Valley and Middle/Lower Mississippi. The hazards associated
with these strong to severe thunderstorms are frequent lightning, severe
thunderstorm wind gusts, hail, and a few tornadoes. However, there will be
an added threat of hail, two inches or greater, over parts of the Southern
Plains/Lower Mississippi Valley.
Also, on Friday, the threat of excessive rainfall will decrease slightly
with two areas of a Marginal Risk (level 1/4) of excessive rainfall over
the Southern Plains and Lower Mississippi, Tennessee Valleys, and Central
Appalachians and the second over parts of the Upper Mississippi Valley and
Upper Great Lakes/Western Ohio Valley. The associated heavy rain will
create localized areas of flash flooding, affecting areas that experience
rapid runoff with heavy rain.
Moreover, showers and severe thunderstorms will develop ahead of a
dryline over parts of the Central/Southern Plains on Saturday. Therefore,
the SPC has issued an Enhanced Risk (level 3/5) of severe thunderstorms
over parts of the Central/Southern Plains on Saturday. The hazards
associated with these thunderstorms are frequent lightning, severe
thunderstorm wind gusts, hail, and a few tornadoes.
The showers and thunderstorms will also produce heavy rain over parts of
the Central Plains/Middle Mississippi Valley on Saturday. Therefore, the
WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts
of the Central Plains/Middle Mississippi Valley. 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.
Meanwhile, a sub-tropical upper-level high over Mexico will aid in
spawning Heat Advisories over southern Texas through Saturday. The ridging
will create a dangerous early-season heat wave over south Texas, Southern
Florida, and into the Central Gulf Coast. Record or near-record warm
overnight temperatures will provide little to no relief to those without
adequate or reliable cooling. By this weekend, record daily high
temperatures and heat index readings over 115 degrees over the regions
will also be possible. The heat is expected to continue next week,
although some relief may reach the Gulf Coast after Memorial Day with a
cold front. Check local media and government websites for cooling center
locations and hours, especially if you encounter or are dealing with a
loss of power. If you use a portable generator, do so safely to avoid
carbon monoxide poisoning. Never use a generator inside a house, garage,
or other enclosed space!
Ziegenfelder
Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php