A FAST MOVING COLD FRONT WAS BRINGING RAIN AND SNOW TO THE MOUNTAINS EARLY THIS MORNING. SNOW LEVELS WERE GENERALLY BETWEEN BETWEEN 6000 TO 6500 FEET EARLY THIS MORNING...EXCEPT LOCALLY DOWN TO BETWEEN 4500 AND 5000 FEET ACROSS THE INTERIOR SLOPES DUE TO TRAPPED POCKETS OF COLD AIR. SNOW ACCUMULATIONS THIS MORNING WILL AVERAGE 3 TO 6 INCHES... MAINLY AT ELEVATIONS ABOVE 6500 FEET. IN ADDITION TO THE SNOW...STRONG WINDS IN THE MOUNTAINS WILL INCREASE TO DAMAGING LEVELS BY THIS AFTERNOON. WIND GUSTS OVER 75 MPH ARE LIKELY FROM THIS AFTERNOON THROUGH THURSDAY MORNING. THE STRONGEST WINDS ARE EXPECTED THROUGH THE INTERSTATE 5 CORRIDOR AND ON HIGHER PEAKS. THE STRONG WINDS COMBINED WITH A VERY COLD AIR MASS WILL CREATE POTENTIALLY LIFE-THREATENING WIND CHILLS IN THE MOUNTAINS LATE TODAY THROUGH EARLY FRIDAY. WIND CHILL VALUES COULD DROP TO BETWEEN ZERO AND 5 DEGREES BELOW ZERO TONIGHT AND THURSDAY. ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON PST THURSDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON PST THURSDAY. * TIMING: SNOW...MODERATE TO HEAVY AT TIMES WILL CONTINUE AT HIGHER ELEVATIONS THIS MORNING. STEADY SNOW WILL TURN TO SCATTERED SNOW SHOWERS THIS AFTERNOON THEN END BY EVENING... EXCEPT NUMEROUS SNOW SHOWERS...OCCASIONALLY HEAVY...WILL CONTINUE INTO THURSDAY MORNING ACROSS THE NORTH SLOPES INCLUDING THE I-5 CORRIDOR. GUSTY SOUTHWEST WINDS WILL SHIFT TO NORTHWEST BY AFTERNOON... INCREASE TO DAMAGING LEVELS DURING THE AFTERNOON...THEN CONTINUE THROUGH THURSDAY MORNING. THE WINDS WILL BEGIN TO DIMINISH SOME THURSDAY AFTERNOON. * SNOW ACCUMULATIONS: 3 TO 6 INCHES OF NEW SNOW ARE EXPECTED ABOVE 6500 FEET TODAY...WITH LOCAL ACCUMULATIONS OF 1 TO 3 INCHES ON INTERIOR SLOPES ABOVE 5000 FEET. ON NORTHERN SLOPES...INCLUDING THE INTERSTATE 5 CORRIDOR...ADDITIONAL SNOW ACCUMULATIONS OF 4 TO 8 INCHES ARE EXPECTED LATE TODAY THROUGH THURSDAY MORNING. * WINDS: SOUTHWEST WINDS 20 TO 30 MPH WITH GUSTS TO 45 MPH WILL SHIFT TO NORTHWEST TO NORTH AND INCREASE TO 30 TO 45 MPH WITH GUSTS TO 75 MPH. WINDS WILL BE STRONGEST THROUGH THE INTERSTATE 5 CORRIDOR AND ON HIGHER PEAKS. * SNOW LEVELS: WILL START OUT BETWEEN 6000 AND 6500 FEET THIS MORNING...EXCEPT BETWEEN 4500 AND 5000 FEET ON INTERIOR SLOPES. SNOW LEVELS WILL BE BETWEEN 4500 AND 5000 FEET IN ALL AREAS THIS AFTERNOON...THEN WILL LOWER TO AROUND 2500 FEET BY LATE TONIGHT. * IMPACTS: SNOW WILL MAKE TRAVEL THROUGH THE MOUNTAINS... INCLUDING INTERSTATE 5...VERY DANGEROUS. WIND GUSTS WILL BE STRONG ENOUGH TO UPROOT TREES AND DAMAGE STRUCTURES...AND ALSO SHIFT MOVING VEHICLES. BITTERLY COLD TEMPERATURES WILL COMBINE WITH THE STRONG WINDS TO PRODUCE LIFE THREATENING WIND CHILL READINGS AS LOW AS ZERO TO 5 DEGREES BELOW ZERO. PRECAUTIONARY/PREPAREDNESS ACTIONS... &&
Instruction:
WHILE PRECIPITATION WILL END IN MOST AREAS THIS AFTERNOON... NUMEROUS SHOWERS WILL CONTINUE ON NORTHERN SLOPES THROUGH THURSDAY MORNING. SNOW LEVELS ARE EXPECTED TO BE BETWEEN 4500 AND 5000 FEET ACROSS ALL MOUNTAIN AREAS BY AFTERNOON...AND LOWER TO 2500 FEET BY LATE TONIGHT. THIS WILL BRING THE RISK FOR SIGNIFICANT SNOW SHOWER ACTIVITY TO PORTIONS OF INTERSTATE 5... MAINLY FROM AREAS NORTH OF CASTAIC TO THE GRAPEVINE AREA. NORTH FACING MOUNTAIN SLOPES NEAR THE KERN COUNTY LINE... INCLUDING THE GRAPEVINE AREA... WILL LIKELY RECEIVE ADDITIONAL SNOW ACCUMULATIONS OF 4 TO 8 INCHES LATER TODAY THROUGH EARLY THURSDAY. WITH THE SURGE OF VERY COLD AIR...ICY CONDITIONS WILL LIKELY DEVELOP ACROSS MOUNTAIN AREAS LATER TODAY AND TONIGHT... CONTINUING THROUGH THURSDAY NIGHT... WITH TREACHEROUS DRIVING CONDITIONS EXPECTED. PEOPLE TRAVELING INTO OR THROUGH THE MOUNTAINS SHOULD CLOSELY MONITOR THE LATEST NATIONAL WEATHER SERVICE FORECASTS AND STATEMENTS AND PLAN ACCORDINGLY. IF TRAVELING INTO THE MOUNTAINS...BE PREPARED FOR THE POSSIBILITY OF WINTER WEATHER CONDITIONS THROUGH THURSDAY. THE COMBINATION OF STRONG WINDS...BLOWING SNOW...AND ICY CONDITIONS COULD CREATE VERY TREACHEROUS DRIVING CONDITIONS ACROSS THE INTERSTATE 5 CORRIDOR NEAR THE GRAPEVINE. A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW... SLEET...AND ICE ARE EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE.
Area: VENTURA COUNTY MOUNTAINS-LOS ANGELES COUNTY MOUNTAINS EXCLUDING THE SANTA MONICA RANGE-INCLUDING THE CITIES OF... LOCKWOOD VALLEY... MOUNT PINOS... ACTON... MOUNT WILSON... SANDBERG
Affected Counties or parts of: Santa Barbara, Ventura, San Luis Obispo, Los Angeles
Sent: 2010-12-29T05:58:02-08:00
Original Sender: KLOX@nwws.oes.ca.gov
From: NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
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