San Bernardino County Mountains-Apple and Lucerne Valleys-Including the cities of Crestline, Lake Arrowhead, Big Bear City,
Big Bear Lake, Running Springs, Wrightwood, Victorville, Hesperia, Apple Valley, and Lucerne Valley
…WIND ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 PM PDT FRIDAY… WHAT…West winds 30 to 40 mph with gusts to 60 mph expected. .San Bernardino County Mountains and Apple and Lucerne Valleys.  WHEN…From 5 PM this afternoon to 11 PM PDT Friday.  IMPACTS…Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. ADDITIONAL DETAILS…Winds each day will be strongest in the afternoon and evening.



A pair of troughs will move across the region through Friday night. Weak high pressure will then build in for this weekend and early next week, before a renewed Pacific troughing pattern develops by the middle of next week.

· Temperatures will be well below normal through Friday, with valley highs in the 60s to low 70s, 80s to near 90 in the low desert, and mostly 50s in the lower mountains.

· The already breezy southwest to northwest winds will increase to 20 to 40 mph with gusts to 60 mph by this afternoon and continuing through Friday night. A period of stronger winds with gusts up to 80 mph is possible Friday afternoon and night.

· Scattered thunderstorms will form over the Sierra this afternoon and evening, especially along and east of the Sierra crest, most focused over Mono and northern Inyo Counties.

· Isolated afternoon showers and thunderstorms are also possible over the mountains of Southern California from Santa Barbara County to Los Angeles County today.

· There will be less shower activity on Thursday, but an isolated shower or thunderstorm is still possible over the Sierra.

· Scattered showers and thunderstorms will then be possible across the entire region on Friday, with activity continuing to favor foothill and mountain locations.

· Drizzle or light rain could also occur during the nights and mornings from a deep marine layer up to the lower coastal mountain slopes through Friday.

· Most locations will receive less than a tenth of an inch of rainfall, but some amounts of a quarter inch to an inch are possible across the Sierra in heavier thunderstorms.

· A slow warming trend will occur Saturday through early next week. By Sunday through Tuesday, temperatures will be close to normal with 70s and low 80s in the valleys and high desert, 90s in the low desert, and 60s to near 70 in the lower mountains.

· Dry weather and a gradual lowering of humidity will accompany the warming trend.

· A cooling trend and an increase in humidity are likely by mid to late next week, potentially accompanied by some precipitation.