Moisture streaming northward over Northwestern Mexico and upper-level energy will aid in producing showers and thunderstorms with heavy rain over parts of Arizona, southern Utah, southeastern Nevada, and extreme Southeastern California.
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Therefore, the WPC has issued a Slight Risk of excessive rainfall with these thunderstorms over parts of the Southwest/Great Basin through Sunday morning.
The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, small streams, narrow crayons/gullies, and burn scars the most vulnerable.
On Sunday, moisture and upper-level energy will move northeastward over parts of the Great Basin and Northern Intermountain Region.
The area of showers and thunderstorms with heavy rain will also move northeastward over northwestern Utah, southeastern Idaho, and northwestern Wyoming.
Therefore, the WPC has issued a Slight Risk of excessive rainfall with these thunderstorms over parts of the Great Basin/Northern Intermountain Region from Sunday into Monday morning.
The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, small streams, narrow crayons/gullies, and burn scars the most vulnerable.
In addition, an upper-level low over Northern California and Oregon will create rain over parts of the Pacific Northwest and Northern California on Saturday and Sunday.
Meanwhile, upper-level energy over the Central Gulf Coast and tropical moisture streaming northward over the Central/Eastern Gulf Coast will produce showers and thunderstorms over the region through Monday.
Furthermore, gusty wind, low relative humidity, and dry fuels have prompted the SPC to issue an Elevated Risk of fire weather over parts of the Central Plains on Saturday.
On Sunday, the gusty wind, low relative humidity, and dry fuels will extend into parts of the Upper Mississippi Valley, prompting the SPC to have an Elevated Risk of fire weather over parts of the Central Plains into the Upper Mississippi Valley. ■