Weather across America

(NATIONAL) Heavy rain and freezing rain over parts of the Southern Plains and Lower/Middle Mississippi Valley, moderate rain and freezing rain over parts of the Great Lakes/northern Ohio Valley, heavy snow for the Sierra Nevada Mountains, higher elevation snow across the West, and moderate to heavy snow over the Great Lakes.

There is a Slight Risk of excessive rainfall over parts of Northern California, Southern California, and the Western Gulf Coast/Lower Mississippi Valley. High pressure over the Central Appalachians/ Mid-Atlantic Middle Mississippi Valley will slowly move over the Western Atlantic by Tuesday evening. Cold air associated with the high will linger over the Central/Southern Plains, Middle Mississippi Valley, and Great Lakes/Ohio Valleys. 

The flow around the area of high pressure over the Eastern U. S. will stream moisture northward from the Western Gulf of Mexico combined with upper-level energy, which will aid in producing rain over parts of eastern Texas into the Lower Mississippi Valley on Monday into Tuesday. The moisture flow will also produce showers, thunderstorms, and heavy rain over parts of the Western Gulf Coast and Lower Mississippi Valley. 

Therefore, the WPC has issued a Slight Risk of excessive rainfall over parts of the Western Gulf Coast and Lower Mississippi Valley 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. On Tuesday, the showers and thunderstorms continue over eastern Texas, Lower Mississippi, and Tennessee Valleys, producing heavy rain. 

The WPC has issued a Slight Risk of excessive rainfall over parts of eastern Texas, the Lower Mississippi and Tennessee Valleys on Tuesday. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, and small streams the most vulnerable. Moreover, the moisture flows northward into the cold air over the country's middle part, producing heavy rain/freezing rain over parts of the Southern Plains, Lower/Middle Mississippi Valley from Sunday evening into Monday evening. 

Additionally, light rain/freezing rain will develop over parts of the Western Ohio Valley into the Great Lakes Sunday evening into Monday evening. From Monday evening into Tuesday, the rain/freezing rain moves more into the Great Lakes/northern Ohio Valley, creating moderate rain/freezing rain over the region. Light rain/freezing rain will continue over parts of the Central Plains/Middle Mississippi Valley.  

Furthermore, a front moving southward out of Central Canada moves into the Upper Great Lakes from Monday evening into Tuesday. The system will produce moderate to heavy snow over the Upper Great Lakes into the Lower Great Lakes on Tuesday. Meanwhile, a front moves over Southern California overnight Sunday into Monday and dissipates by Tuesday evening. 

A plume of moisture will move over parts of Northern California, producing heavy rain from Saturday into Monday. Therefore, the WPC has issued a Slight Risk of excessive rainfall over parts of Northern California into Monday morning. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, small streams, narrow canyons/gullies, and burn scars the most vulnerable.  

Moreover, the moisture will produce heavy snow over the Sierra Nevada Mountains from Sunday evening into Monday evening. The system moving away from the area will produce lighter snow over the Sierra Nevada Mountains from Monday evening into Tuesday.  On Monday, the plume of moisture moves southward, flowing into Southern California, producing heavy rain.

The WPC has issued a Slight Risk of excessive rainfall over parts of Southern California Monday into Tuesday morning. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, small streams, narrow canyons/gullies, and burn scars the most vulnerable.  Elsewhere, with a steady flow of moisture moving over the West, snow will fall over the highest elevations from the Pacific Northwest to the