Heavy snow over parts of the Southern Plain/Middle Mississippi Valley
on Sunday and over the Northeast overnight Monday into Tuesday.
There is a Slight Risk of excessive rainfall over parts of Southern
Appalachians/Southeast into the southern Mid-Atlantic.
There is an Enhanced Risk of severe thunderstorms over parts of the
Western Gulf Coast/Lower Mississippi Valley on Sunday; there is a Slight
Risk of severe thunderstorms over parts of the Central Gulf
Coast/Southeast on Monday.
Low pressure, an associated front along the Gulf Coast, moves
northeastward to the Mid-Atlantic Coast by Tuesday and then moves out over
the Western Atlantic. The low will pull moisture off the Gulf of Mexico,
producing an area of heavy rain over parts of the Southern
Appalachians/Southeast. Therefore, the WPC has issued a Slight Risk of
excessive rainfall over parts of the Southern Appalachians/Southeast
through Monday morning. The associated heavy rain will create mainly
localized areas of flash flooding, with urban areas, roads, and small
streams the most vulnerable.
In addition, showers and severe thunderstorms will develop over parts of
the Central Gulf Coast. Therefore, the SPC has issued an Enhanced Risk of
severe thunderstorms over the Western Gulf Coast/Lower Mississippi Valley
through Monday morning. The hazards associated with these thunderstorms
are frequent lightning, severe thunderstorm wind gusts, hail, and a few
tornadoes. Furthermore, there is an increased threat of EF2-EF5 and hail
two inches or greater over parts of the Western Gulf Coast/Lower
Mississippi Valley into Monday morning. Moreover, a narrow strip of heavy
snow will develop over parts of the Southern Plains/Middle Mississippi
Valley Sunday night into Monday morning.
On Monday, the threat of excessive rainfall continues as heavy rain
develops over parts of the Southern Appalachians/southern Mid-Atlantic.
Therefore, the WPC has issued a Slight Risk of excessive rainfall over
parts of the Southern Appalachians/southern Mid-Atlantic from Monday into
Tuesday morning. The associated heavy rain will create mainly localized
areas of flash flooding, with urban areas, roads, and small streams the
most vulnerable.
Similarly, the threat of severe thunderstorms continues on Monday.
Therefore, the SPC has issued a Slight Risk of severe thunderstorms over
parts of the Central Gulf Coast/Southeast from Monday into Tuesday
morning. The hazards associated with these thunderstorms are frequent
lightning, severe thunderstorm wind gusts, hail, and a few tornadoes.
Additionally, as the low moves northeastward, light to moderate snow will
develop over parts of the Ohio Valley. Further, heavy snow will develop
overnight over parts of the Northeast, Monday into Tuesday.
Meanwhile, another wave of low pressure moving along a front over the
Upper Midwest will produce snow over parts of the Upper Mississippi Valley
and Upper Great Lakes from Sunday into Monday. However, light snow will
continue over the Upper Great Lakes on Tuesday.
Furthermore, upper-level energy moving across the Pacific Northwest to the
Northern Plains will rain and higher elevation snow over parts of the
Pacific Northwest through Monday evening. As the energy moves eastward,
snow develops over parts of the Northern Intermountain Region/Northern
Rockies that will continue into Tuesday evening. On Tuesday, snow will
develop over parts of the Northern Plains.
