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Strong winds expected to lash mountains and valleys of Riverside County

Tuesday, January 15th, 2013
Issue 03, Volume 17.

RIVERSIDE - Strong northeast-to-east winds are expected to lash the mountains and valleys of Riverside County through this evening.

"Winds will peak through (the) morning, and then start to diminish" tonight, according to the National Weather Service. "However, offshore flow will remain locally breezy through early next week."

The weather service issued a high wind warning for the mountains until 10 a.m., at which time a less serious wind advisory is set to take effect until 10 p.m. A wind advisory issued for the valleys is scheduled to expire at 10 p.m.

Throughout the day today, sustained winds of 20 to 35 miles per hour, gusting up to 60 mph or more, are expected in the mountains. In the valleys, slightly weaker winds are expected.

Wind and frost advisories now in effect

RIVERSIDE - Blustery conditions are in store for Riverside County today with temperatures in the valleys starting out in the 20s and low 30s this morning, forecasters said.

A frost advisory was in effect for the Inland Empire and the Coachella Valley until 9 a.m. The National Weather Service also scheduled a wind advisory for the valleys and mountains until 10 p.m. Thursday, saying top local gusts will reach 55 miles per hour or more.

"Northeast to east winds will subside by late Thursday night, becoming locally breezy through early next week," according to an NWS advisory. "Warmer conditions tonight through the weekend will mitigate frost chances."

Highs today were expected to top out in the 60s in the Inland Empire and Coachella Valley and in the 50s in the mountains.

Wind and frost advisories now in effect

RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE-Wind advisory now in effect until 10 pm Thursday. Frost advisory remains in effect from 10 pm this evening to 9 am Wednesday. High wind warning is canceled.

The National Weather Service in San Diego has canceled the high wind warning.

* Winds...areas of northeast winds 15 to 25 mph with gusts to 40 mph.

* Location...mainly through and below the Cajon pass and San Gorgonio pass...and near the foothills.

* Timing...tonight through 10 pm Thursday.

* Impacts...the winds will make driving difficult, especially for motorists with high profile vehicles. Watch for broken tree limbs and downed power lines.

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Temperatures...dropping to 29 to 32 degrees for many wind-sheltered pockets overnight.

* Timing for frost...late this evening through mid-morning Wednesday.

* Impacts for frost...sensitive plants and crops may be damaged or killed if left unprotected.

* Outlook...northeast winds will subside by late Thursday night...becoming locally breezy through early next week. Warming conditions Wednesday night through the weekend will mitigate frost chances.

Precautionary/preparedness actions...

A wind advisory means that winds of 35 mph are expected. Winds this strong can make driving difficult...especially for high profile vehicles. Use extra caution.

A frost advisory means that frost is possible. Sensitive outdoor plants may be killed if left uncovered.

Strong, damaging winds to hit Riverside County

RIVERSIDE - Strong, damaging winds will buffet Riverside County today and may linger into Thursday, forecasters said.

"North to northeast winds will continue to strengthen near the foothills as an upper-level disturbance intensifies over the desert southwest," according to a National Weather Service advisory. "The strong and gusty offshore winds will continue below passes and canyons through this evening, and possibly into Thursday evening as surface high pressure continues to build over the Great Basin."

The agency issued a high wind warning for the Inland Empire, mountain areas and the Coachella Valley until 10 p.m., and a less serious high wind watch for the mountains from late this evening to Thursday night.

A high wind watch is also scheduled for the Inland Empire from 10 a.m. Wednesday through 10 p.m. Thursday.

Sustained northeast winds of 15 to 30 miles per hour with gusts of up to 60 mph are expected during today's high wind warning period, with occasional gusts of more than 70 mph through and below passes and canyons, according to the weather service.

Areas where high winds are expected include the vicinity of the Banning Pass, the Morongo Pass and the foothills and canyons of the Little San Bernardino mountains, according to NWS forecasters.

"The winds will make driving difficult, especially for high profile vehicles," an NWS advisory said. "Watch for broken tree limbs and downed power lines."

Mountain areas above 6,000 feet are also under a wind chill advisory until 9 a.m. A wind chill advisory means the combination of very cold air and strong winds will increase the risk for frost bite and hypothermia.



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