Wet weather/flash flooding this weekend
Posted: Fri Sep 05, 2014 12:56 pm
Per NWS Las Vegas & San Diego a storm will move into the county this weekend and could pose a significant risk to the mountain communities, in particular Mt. Baldy and Forest Falls and other flashflood prone areas. See storm details below. OES will continue to monitor and provide updates.
Weather Threats: Flash Flooding & Thunderstorms (Heavy Rain)
Timing: Saturday, Sep. 6 through Tuesday, Sep. 9.
• Saturday 9/6 Late night start of thunderstorms
• Sunday 9/7 Thunderstorms all day
• Monday 9/8 Thunderstorms and some generalized precipitation
• Tuesday 9/9 Thunderstorms and generalized precipitation tapering off.
Location: Riverside County Mountains, San Bernardino County Mountains & Foothills, San Bernardino County Deserts and the Colorado River Valley
Storms/System Intensity: moderate to strong (possible areas of impact) 1.5” to 2” per hour. Sunday is mostly thunderstorms with stratoform clouds and precipitation possible late Sunday through Tuesday as a low pressure system moves southward through California.
Impacts: Lightning, heavy rains, possible local flash flooding
Forecaster Confidence: Moderate to High
Event Summary: Tropical Storm (at times Hurricane) Norbert will move northwest off the coast of Baja California through this weekend. This will bring a large increase of moisture over southern California by Sunday. Thunderstorms will be possible beginning early Sunday and could continue through Tuesday. The best chance of thunderstorms will be in the eastern mountains, Colorado River Valley, eastern deserts and possibly foothills. Heavy rain will be possible with some thunderstorms, especially in the mountains and deserts, and local flash flooding will be possible.
SOURCE: National Weather Service – Las Vegas Forecast Office
Weather Threats: Flash Flooding & Thunderstorms (Heavy Rain)
Timing: Saturday, Sep. 6 through Tuesday, Sep. 9.
• Saturday 9/6 Late night start of thunderstorms
• Sunday 9/7 Thunderstorms all day
• Monday 9/8 Thunderstorms and some generalized precipitation
• Tuesday 9/9 Thunderstorms and generalized precipitation tapering off.
Location: Riverside County Mountains, San Bernardino County Mountains & Foothills, San Bernardino County Deserts and the Colorado River Valley
Storms/System Intensity: moderate to strong (possible areas of impact) 1.5” to 2” per hour. Sunday is mostly thunderstorms with stratoform clouds and precipitation possible late Sunday through Tuesday as a low pressure system moves southward through California.
Impacts: Lightning, heavy rains, possible local flash flooding
Forecaster Confidence: Moderate to High
Event Summary: Tropical Storm (at times Hurricane) Norbert will move northwest off the coast of Baja California through this weekend. This will bring a large increase of moisture over southern California by Sunday. Thunderstorms will be possible beginning early Sunday and could continue through Tuesday. The best chance of thunderstorms will be in the eastern mountains, Colorado River Valley, eastern deserts and possibly foothills. Heavy rain will be possible with some thunderstorms, especially in the mountains and deserts, and local flash flooding will be possible.
SOURCE: National Weather Service – Las Vegas Forecast Office