A front extending from the Upper Great Lakes to the Southern High Plains on Thursday evening moves eastward to the Lower Great Lakes, Mid-Atlantic, and Central Gulf Coast by Saturday evening.
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Moisture pooling along the front will aid in developing showers and severe thunderstorms over parts of the Central/Southern Plains and Middle Mississippi Valley.
Therefore, the SPC has issued a Slight Risk (level 2/5) of severe thunderstorms over parts of the Southern Plains through Friday morning.
The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few tornadoes.
Additionally, there is an increased threat of hail two inches or greater over parts of the area.
Moreover, the front will create heavy rain over parts of the Southern Plains.
Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of the Southern Plains through Friday 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, the associated upper-level energy will produce scattered heavy snow over parts of the Central/Southern Rockies through overnight Friday.
Further, the same upper-level energy will also create rain and higher-elevation snow over parts of Central/Southern California, the Great Basin, and the Southwest from Thursday evening into Friday evening.
On Friday, as the system moves eastward, showers and thunderstorms will expand into the Ohio, Middle/Lower Mississippi, and Tennessee Valleys, along with the Southeast and Central/Southern Appalachians.
The threat of excessive rainfall increases over parts of the Southeast.
Therefore, the WPC has issued a Moderate Risk (level 3/4) of excessive rainfall over the Southeast from Friday into Saturday morning.
The associated heavy rain will create numerous areas of flash flooding.
Furthermore, many streams may flood, potentially affecting larger rivers.
Additionally, showers and severe thunderstorms will develop over parts of the Southern Plains to Southeast.
Therefore, the SPC has issued a Slight Risk (level 2/5) of severe thunderstorms over parts of the Southern Plains to the Southeast from Friday into Saturday morning.
The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few tornadoes.
Additionally, there is an increased threat of hail two inches or greater over parts of the Southern Plains/Lower Mississippi Valley.
Moreover, the system will produce light to moderate snow over parts of the Upper Great Lakes on Friday, extending into the Great Lakes on Saturday.
Rain will develop South of the snow in parts of the Great Lakes, mainly changing over the snow by Saturday evening.
On Saturday, the threat of excessive rainfall and severe thunderstorms move east into the Mid-Atlantic and Southeast.
Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of the southern mid-Atlantic on Saturday.
The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, and small streams the most vulnerable.
Furthermore, severe thunderstorms will develop over the Central Gulf Coast to the Southeast.
Therefore, the SPC has issued a Slight Risk (level 2/5) of severe thunderstorms over parts of the Central Gulf Coast to the Southeast on Saturday.
The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few tornadoes.
Meanwhile, a front will move onshore over the Pacific Northwest on Friday, moving to the Northern Rockies and Central California by Saturday evening.
The storm will produce rain and snow at higher elevations over parts of the Northwest and Northern California from Friday into Saturday evening. ■
Modified arctic air combined with a moisture-laden area of low pressure along the Gulf Coast will continue to allow for a broad area of winter weather impacts from the Lower Mississippi Valley to the Southeast today into early Saturday morning.