Wet, windy weather likely to intensify Tuesday – San Bernardino Sun

One of the fiercest storm systems so far this season is expected to peak Tuesday afternoon, bringing rain and gusty winds to parts of Southern California and snow to the mountains, while prompting worries about flooding and possibly playing havoc with travel as Election Day voters head to the polls.

The three-day storm moving south from the Gulf of Alaska brought some rain during the day Monday but was expected to intensify later in the evening, with forecasters predicting the heaviest rainfall in Southern California on Tuesday afternoon. The wet weather is likely to linger into Wednesday before tapering off.

Total rainfall from the storm could exceed 5 inches in some areas, according to the National Weather Service’s Los Angeles office.

“Periods of rain, mountain snow and strong and gusty winds will affect the area through Wednesday as a significant storm system originating out of the Gulf of Alaska moves over the region,” according to the NWS.

In the mountains, snow accumulation was possible Monday night at 6,500 to 7,000 feet, where forecasters predicted 6 to 12 inches, with local amounts up to 20 inches.

Wind gusts in the mountains and high desert could increased to 55 mph Tuesday. The weather service advised motorists to “prepare for slick roads and wintry travel in the mountains,” as well as potential issues along the Grapevine on Tuesday.

On Monday, the city city of Duarte issued mandatory evacuations for about 25 homes in the Fish Fire Impact area from 11 p.m. Monday night through Tuesday, and potentially Wednesday.

In Orange County, sheriff’s officials issued a voluntary evacuation order for Silverado Canyon, Williams Canyon and Modjeska in the Bond Fire burn scar area from 4 p.m. to 7 p.m. Tuesday due to the heavy rains that would increase a risk of flooding and debris flow.

In Monrovia  city officials warned residents of possible debris and mud flow in the Oakglade Drive and Ridgeside Drive neighborhoods, and offered some pre-filled gravel bags to residents in need.

One lane on the northbound I-15 in Hesperia from Oak Hill Road to Ranchero Road was closed due to flooding Monday afternoon.

The San Bernardino County mountains are expected to see 3 to 6 inches, with some of the highest peaks seeing 7 to 8 inches or above Tuesday afternoon and evening. Snow levels are expected to be high, above 7,000 ft., but will decrease slightly Tuesday night to above 6,000 ft.,National Weather Service meteorologist Samantha Connolly said.

Riverside County mountains will see slightly less rainfall – estimated to be about 2 to 3 inches total. San Jacinto Mountain, which is over 10,000 ft. of elevation, could see 1 to 2 feet of snow.

Coastal Orange County will see an 1 to 1.5 inches with the Santa Ana Mountains expected to receive slightly more rain around 2 to 4 inches.

The brunt of the storm will also hit Los Angeles County on Tuesday. Coastal and valley regions are expected to see a total of 1 to 1.75 inches across the three days.

Most areas across the region will also be windy Tuesday.

By Wednesday afternoon, most of the rain and wind will have passed. Temperatures will remain below seasonal normal, but a gradual warm up and drier weather is predicted Thursday onward.

This storm is one of the more significant systems forecasters have seen at the beginning of this rain season, but the state will need many more storms of this intensity in the long term to help with the drought, Connolly said.

“Any rain we can get will help in the short-term,” Connolly said.

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