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Heavy Rain in the Southwest, Flood Watches in California

2 Aug 2017, 10:31 am

Copious amounts of monsoonal moisture will continue to stream across the Southwest today, especially in Southern California. Showers and thunderstorms have been developing across the entire region and more are likely through Thursday. Due to abundant moisture throughout the atmosphere, there will be the potential for intense downpours with any thunderstorms. This will bring a risk of flash flooding, especially to interior sections of California. A Flash Flood Watch has been issued.

Particularly vulnerable to the effects of heavy downpours will be over urbanized land and debris flows below recent burn scars. The Whittier and Alamo burn areas are particularly vulnerable. In addition to an increased threat of flash flooding, mud and debris flows will be a concern should heavy rain occur.

The rain will be falling over dry area, which may help the drought situation, but the dry ground may produce runoff problems as the ground is not as porous. As upper level energy moves through the flow in the atmosphere and interacts with high humidity, storms will continue to develop.

The rain will not be continuous, but heavy at times. Latest computer models indicate that the moisture will linger into Thursday night, especially in the mountains and the Antelope Valley, so the Flash Flood watch may have to be extended in some areas.

For WeatherNation: Meteorologist Mace Michaels

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