Motorists hit the road and travel along the 210 freeway in Rancho Cucamonga as the morning sun peaks over the mountains on Monday, September 21 2015.
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A flash-flood watch means conditions are favorable for flash flooding while a flash flood warning means the activity is imminent, explains NWS meteorologist Valerie Myers.
The National Weather Service has issued a Flash Flood Watch for the Big Island, in addition to Maui County through Monday afternoon.
The rain is courtesy of Tropical Depression 16-E that made landfall early Monday in Mexico after developing Sunday in the eastern Pacific Ocean. The watch includes the San Gorgonio Pass.
Forecasters predicted rainfall in excess of an inch in the deserts and the inland valleys and more than two inches in the mountains.
As of Monday morning, rain already is falling in the Yuma area, and Myers says, “It’s just a matter of time before rain and heavy showers increase across the area and become more widespread”. People in those areas should check the weather forecast and be alert to rapidly changing conditions. The chance of rain is 70 percent, the Weather Service said.
Locales in and below recently burned areas will be particularly susceptible to heavy runoff and debris flows should strong thunderstorms develop nearby.
Triple-digit high temperatures of this weekend in Metro Phoenix are expected to dip into the mid and upper 80s both Monday and Tuesday, before drier and warmer weather returns for the middle and end of the week. Highs will be 83 to 90.
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Flash floods are possible, along with flooding for those who may live in low-lying areas or flood-prone neighborhoods.
