MESQUITE, Nev. — The National Weather Service in Las Vegas has issued a flash flood watch for portions of northwest Arizona, southeast California and southern Nevada in effect from late Friday night through Saturday evening.
- Northwest Arizona: Lake Mead National Recreation Area, Northwest Plateau
- Southeast California: Cadiz Basin, eastern Mojave Desert
- Southern Nevada: Lake Mead National Recreation Area, Las Vegas Valley, northeast Clark County, Sheep Range, southern Clark County, Spring Mountains-Red Rock Canyon
Deep moisture associated with Hurricane Dolores will spread into eastern San Bernardino County, California, and up into Clark County, Nevada, Saturday morning through Saturday evening, leading to the potential for heavy rain-producing thunderstorms. This will produce favorable conditions for an elevated threat of flash flooding across the aforementioned areas.
Precautionary, preparedness actions
Remain alert for flooding even in locations not receiving rain. Dry washes, streams and rivers can become raging killer currents in a matter of minutes, even from distant rainfall.
Move to higher ground now. Act quickly to protect your life.
Do not drive your vehicle into areas where the water covers the roadway. The water depth may be too great to allow your car to cross safely.
Turn around. Don’t drown.
The National Oceanic and Atmospheric Association and the National Weather Service offer safety rules for flash flooding:
- Flash flooding is a very dangerous situation
- Flash flood waves, moving at incredible speeds, can roll boulders, tear out trees, destroy buildings and bridges and scour out new channels. Killing walls of water can reach heights of 10 to 20 feet. You will not always have warning that these deadly, sudden floods are coming. When a flash flood warning is issued for your area or the moment you first realize that a flash flood is imminent, act quickly to save yourself. You may have only seconds.
- Most flood deaths occur in automobiles. Do not drive your vehicle into areas where the water covers the roadway. Flood waters are usually deeper than they appear. The road bed may not be intact under the water. Just one foot of flowing water is powerful enough to sweep vehicles off the road. If the vehicle stalls, abandon it immediately and seek higher ground. Rapidly rising water may engulf the vehicle and its occupants and sweep them away
- Do not hike rivers and especially slot canyons while flash flood warnings are in place
- Do not hike alone and always tell someone where you and your buddy and others are going
- Get out of areas subject to flooding, including dips, low spots, canyons and washes
- Avoid already flooded and high velocity flow areas. Do not try to cross a flowing stream on foot where water is above your knees
- Be especially cautious at night when it is harder to recognize flood dangers
- Do not camp or park your vehicle along streams and washes, particularly during threatening conditions
During any flood emergency, stay tuned to your NOAA weather radio, commercial radio or television, follow St. George News at STGnews.com and St. George News Facebook for weather alerts and updates relevant to Southern Utah. Information from the National Weather Service and disaster and emergency services may save your life.
Ed. note: Alert time and affected areas updated per new information from National Weather Service.
- Southern Utah, surrounding states: 7-days hazardous weather; flash flood watch
- What to do before, during, after a flash flood
- I can’t believe I survived; video of flash flood crashing down on canyoneers
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