More Thunderstorms, Humidity Expected in Inland Empire | NBC Southern California

More Thunderstorms, Humidity Expected in Inland Empire

Forecasters said thunderstorms could produce very heavy rain Saturday afternoon

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    NEWSLETTERS

    Rescuers aided a woman in the mountain community of Forest Falls, where mud flows swept through Mill Creek during revere rain on Friday. A flash-flood warning was again in effect for much of the Inland Empire on Saturday.

    A day after heavy rain, flooding and even a mud slide hit areas of the Inland Empire, a flash-flood watch was in effect Saturday for Riverside County and mountains and deserts of Southern California.

    The National Weather Service had reported the flash-flood watch would be in effect until 8 p.m. for the Coachella, Apple and Lucerne valleys and the mountains and deserts of Riverside, San Bernardino and San Diego counties.

    Heavy Rains Trigger Flash Flooding in Forest Falls

    [LA] Heavy Rains Trigger Flash Flooding in Forest Falls
    In Forest Falls, a mudslide triggered by a day of pop-up storms and torrential rain in the Inland Empire barreled down a creek, moving logs that witnesses described as the “size of a Wolkswagen bus.” Alex Vasquez says the mudslide appeared to catch two hikers off guard. (Published Friday, Aug. 17, 2012)

    At about 2:15 p.m., radar showed thunderstorms weakening over the region, but a flood advisory remained in effect for urban and small streams for the afternoon.

    Areas that have recently burned in wildfires will be particularly susceptible to flooding and debris flows, the service said.

    Wild Weather Sweeps Through Inland Empire

    [LA] Wild Weather Sweeps Through Inland Empire
    The day began with sunshine and high temperatures, but high winds and pop-up thunderstorms swept through cities like Lake Elsinore and Yucaipa on Friday. The heavy down pour triggered flash-flood warnings in certain areas. Jacob Rascon reports from Lake Elsinore for the NBC4 News at 5 p.m. on Aug. 17, 2012. (Published Friday, Aug. 17, 2012)

    The weather service described flash floods as "very dangerous" and it warned drivers to avoid flooded roads. Most flood deaths occur in automobiles, the service said.

    "Just 1 foot of flowing water is powerful enought to sweep vehicles off the road," the federal weather service said.

    The warning came a day after hikers were stranded by mud and debris flow in Forest Falls, among other weather-caused incidents Friday.

    "There's a chance of strong thunderstorms today in both counties, mostly in the mountains and deserts with possible localized flooding in and near thunderstorms,'' weather forecaster Mike Webster said.

    Monsoonal moisture coming from Mexico's Sea of Cortez was creating extremely humid conditions north in Southern California. Slow-moving thunderstorms could cause very heavy rain and floods, Webster said.

    The humid conditions will continue, Webster said, because strong winds haven't arisen to push the moisture out of the region.

    ''The humidity is going to remain on and off throughout the next couple weeks with a chance of thunderstorm formation over the mountains and deserts of San Diego and Riverside counties," Webster said.

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