National Weather Service: United States weather forecast for today August 18, 2022


United States.-The Weather Prediction Center of the National Weather Servicewarned this Thursday that there is a moderate risk of excessive rainfall in parts of the Southwest Friday through Saturday mornings.

Also, there is a slight risk of excessive rainfall in parts of the Southwest/Great Basin, Central Gulf Coast and Southeast as of Thursday through Friday morning, also reports there is a Excessive Heat Watch and a Heat Advisory in parts of the West Coast through Friday night.

Utah, Arizona and Nevada

Monsoonal moisture and upper-level energy over parts of North-Central Mexico will help produce showers and storms with heavy rain over parts of Utah, Arizona, and the eastern end of Snowfall.

Therefore, the WPC has issued a slight risk of excessive rainfall in parts of the Southwest and Great Basin until Friday morning.

The associated heavy rain create primarily localized areas of flash flooding, with urban areas, roads, and small streams the most vulnerable.

California

On Friday, upper level energy over parts of the north-central Mexico merge with higher level energy above California to produce an upper level low over the southwest that will begin moving east on Saturday.

The tropical and low humidity in the upper levels will help produce showers and thunderstorms with strong rains about the south of Arizona and southern New Mexico.

Therefore, the WPC has issued a moderate risk of excess rain over the southwest near the border between United States and Mexico from Friday to Saturday morning. The associated heavy rains will create numerous areas of flash flooding.

Also, many streams can flood, potentially affecting larger rivers.

Mississippi and Louisiana

Meanwhile, a weak front extending from the southeast roughly west into the Southern Plains, tropical moisture and upper-level impulses produce showers and thunderstorms, with heavy rain over Mississippi and Louisiana and a second region over parts of Florida, Georgia of the United States, and South Carolina.

Therefore, the WPC has issued a slight risk of excessive rainfall across portions of the central gulf coast and southeast through Friday morning. The associated heavy rains will primarily create localized areas of flash flooding, with urban areas, roads and small streams the most vulnerable.

From Friday to Saturday, the threat of excess precipitation decreases slightly; however, the threat of excess precipitation is shifting to the southern Mid-Atlantic.

Therefore, the WPC has issued a marginal risk of excessive rain in parts of the southern Mid-Atlantic, Southeast, Gulf Coast and Southern Plains from Friday through Saturday morning.

Heavy rains associated will create localized areas of flash flooding, affecting areas experiencing rapid runoff with heavy rain. Also, a front over the Upper Midwest is moving toward the Upper Great Lakes. to the Central Plains on Saturday.

Mississippi Valley and Northern Plains

The limit will produce showers and storms with the possibility of strong rains in the zone. Therefore, the WPC has issued a marginal risk of excessive rainfall in parts of the Upper Mississippi Valley and Northern Plains through Friday morning.

The associated heavy rains will create localized areas of flash flooding, affecting areas experiencing rapid runoff with strong rains.

On Friday, the threat of excessive rains moves to the Middle Mississippi Valley, where he WPC have a Marginal risk of excessive rainfall from Friday to Saturday morning.

Sacramento and San Joaquin Valleys

Elsewhere, upper-level ridges will be built over the Rocky Mountains, allowing temperatures to climb into the hundreds of lows to highs in parts of California, prompting a heat advisory over Sacramento and San Joaquin Valleys until Friday night.

As the upper level ridge builds over the Northwest, temperatures rise in the upper nineties to low hundreds in the interior Northwest, causing a Excessive Heat Alert and Heat Warnings in the region through Friday night.

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Also, record relatively high low temperatures They will contribute to areas not cooling down at night, which will also contribute to heat effects.

Source-www.debate.com.mx