…There is a Slight Risk of severe thunderstorms over parts of the
Southern Plains/Lower Mississippi Valley and Upper Mississippi Valley on
Monday and over the Upper/Middle Mississippi Valley and Central Plains on
Tuesday…
…There is a Slight Risk of excessive rainfall over parts of the Northern
Intermountain Region, Upper Mississippi Valley, Central/Southern Plains;
and Middle/Lower Mississippi on Monday and the Upper /Middle/Lower
Mississippi Valley, Southern Plains on Tuesday…
…There are Excessive Heat Warnings, Excessive Heat Watches, and Heat
Advisories over Central/Southern California and Southwest and Heat
Advisories over western/southern Texas…
A front extending from the Upper Mississippi Valley to the
Northern/Central High Plains and then southwestward to the Great Basin
will move eastward to the Great Lakes/Ohio Valley to the Southern Plains
by Wednesday. The front will produce showers and severe thunderstorms over
parts of southern Wisconsin and northwestern Illinois. Therefore, the SPC
has issued a Slight Risk (level 2/5) of severe thunderstorms over parts of
the Upper Mississippi Valley/Upper Great Lakes through Tuesday morning.
The hazards associated with these thunderstorms are frequent lightning,
severe thunderstorm wind gusts, hail, and a few tornadoes.
Furthermore, the showers and thunderstorms will create heavy rain over
northwestern Illinois and southern Wisconsin. Therefore, through Tuesday
morning, the WPC has issued a Slight Risk (level 2/4) of excessive
rainfall over parts of the Upper Mississippi Valley/Upper Great Lakes. 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.
Upper-level energy east of the dryline will also create showers and severe
thunderstorms over parts of the Lower Mississippi Valley and Southern
Plains. Therefore, the SPC has issued a Slight Risk (level 2/5) of severe
thunderstorms over parts of the Southern Plains and Lower Mississippi
Valley through Tuesday morning. The hazards associated with these
thunderstorms are frequent lightning, severe thunderstorm wind gusts,
hail, and a few tornadoes. Moreover, there is an added threat of hail, two
inches or greater over north-central Texas and southeastern Oklahoma.
Likewise, the showers and thunderstorms will develop 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 through Tuesday 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 Tuesday, a reinforcing cold front will move out of the Northern Rockies
and merge with the front over the Mississippi Valley, producing showers
and severe thunderstorms over parts of the Upper/Middle Mississippi Valley
and Central Plains. Therefore, the SPC has issued a Slight Risk (level
2/5) of severe thunderstorms over parts of the Upper/Middle Mississippi
Valley and Central Plains from Tuesday into Wednesday morning. The
hazards associated with these thunderstorms are frequent lightning, severe
thunderstorm wind gusts, hail, and a few tornadoes.
Moreover, the showers and thunderstorms will cause heavy rain over the
Upper/Middle/Lower Mississippi Valley and Central/Southern Plains.
Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive
rainfall over parts of the Upper/Middle/Lower Mississippi Valley and
Central/Southern Plains from Tuesday through Wednesday 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 Wednesday, the threat of excessive rainfall will decrease slightly over
the Great Lakes, Ohio/Tennessee Valleys, Lower Mississippi Valley,
Southern Plains, Central/Southern Appalachians, Mid-Atlantic and
Southeast. Therefore, the WPC has issued a Marginal Risk (level 1/4) of
excessive rainfall over the region on Wednesday. The associated heavy
rain will create localized areas of flash flooding, affecting areas that
experience rapid runoff with heavy rain. Also, on Wednesday, the threat of
severe thunderstorms will end. However, showers and thunderstorms will
develop over the eastern third of the lower forty-eight states.
Meanwhile, on Monday, rain and snow melt will produce heavy runoff over
parts of the Northwest and Northern Intermountain Region. Therefore, the
WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts
of the Northern Intermountain Region through Tuesday 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.
In addition, early Tuesday, a front will move onshore over the Pacific
Northwest and inland to the Northern Intermountain Region and weaken by
Wednesday. The system will produce rain over parts of the Pacific
Northwest and Northern Intermountain Region.
Furthermore, a developing upper-level ridging will build over California
and continue over southern/western Texas, aiding in spawning Excessive
Heat Warnings, Excessive Heat Watches, and Heat Advisories over
Central/Southern California and western/southern Texas and Central
California.
Moreover, the ridging will create the first round of dangerous heat this
season. The hottest temperatures so far for the West will build in
California and the Desert Southwest on Tuesday. On Wednesday, the heat
will create record-breaking daily high temperatures for portions of
Californiaâ€s Central Valley. Be sure to break your heat exposure by
avoiding outdoor time at the hottest times of the day. Check local media
and government websites for cooling center locations and hours.
Ziegenfelder
Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php