Posts tagged Weather

Special Weather Statement

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
701 PM PST WED FEB 23 2011

CAZ034>041-044>046-051>054-059-087-088-547-548-250200-
SAN LUIS OBISPO COUNTY CENTRAL COAST- SANTA BARBARA COUNTY CENTRAL COAST-SANTA YNEZ VALLEY- SAN LUIS OBISPO COUNTY INTERIOR VALLEYS-CUYAMA VALLEY-SANTA BARBARA COUNTY SOUTH COAST-VENTURA COUNTY COAST-LOS ANGELES COUNTY COAST INCLUDING DOWNTOWN LOS ANGELES-VENTURA COUNTY INTERIOR VALLEYS-VENTURA COUNTY COASTAL VALLEYS-SANTA MONICA MOUNTAINS RECREATIONAL AREA-SAN LUIS OBISPO COUNTY MOUNTAINS-SANTA BARBARA COUNTY MOUNTAINS-VENTURA COUNTY MOUNTAINS-LOS ANGELES COUNTY MOUNTAINS EXCLUDING THE SANTA MONICA RANGE-ANTELOPE VALLEY-CATALINA ISLAND-SANTA CLARITA VALLEY-LOS ANGELES COUNTY SAN FERNANDO VALLEY-LOS ANGELES COUNTY SAN GABRIEL VALLEY-
701 PM PST WED FEB 23 2011

…A VERY COLD STORM SYSTEM WILL IMPACT SOUTHWEST CALIFORNIA FRIDAY INTO SATURDAY…

A VERY COLD LOW PRESSURE SYSTEM ORIGINATING FROM CANADA WILL MOVE SOUTHWARD ALONG THE WEST COAST ON THURSDAY…THEN IMPACTING SOUTHWEST CALIFORNIA FRIDAY INTO SATURDAY.

THE INITIAL COLD FRONT WILL BRING ABOUT 3 TO 5 HOURS OF MODERATE TO HEAVY RAIN AND MOUNTAIN SNOW TO SAN LUIS OBISPO AND SANTA BARBARA COUNTIES ON FRIDAY…SPREADING INTO VENTURA AND LOS ANGELES COUNTIES LATE FRIDAY AFTERNOON INTO FRIDAY NIGHT. BEHIND THE COLD FRONT… A VERY COLD AND UNSTABLE AIR MASS WILL CONTINUE TO BRING A THREAT OF SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS INTO SATURDAY. SOME OF THESE POST-FRONTAL STORMS COULD BRING BRIEF HEAVY DOWNPOURS…HAIL…GUSTY WINDS…AND WATERSPOUTS. PRELIMINARY RAINFALL AMOUNTS ARE GENERALLY EXPECTED TO RANGE FROM ONE HALF TO ONE INCH ACROSS THE COASTAL AND VALLEY AREAS…WITH ONE TO TWO INCHES POSSIBLE IN THE FOOTHILLS AND LOWER MOUNTAIN ELEVATIONS.

THE MAIN IMPACTS OF THIS UPCOMING STORM SYSTEM WILL BE THE POTENTIAL FOR SIGNIFICANT SNOWFALL ACCUMULATION AND STRONG WINDS IN THE MOUNTAINS…AS WELL AS THE POTENTIAL FOR VERY LOW SNOW LEVELS BEHIND THE FRONT. THE MAJORITY OF THE SNOWFALL IN THE MOUNTAINS IS EXPECTED TO BE ASSOCIATED WITH THE COLD FRONT…WHEN SNOW LEVELS ARE GENERALLY EXPECTED TO BE AROUND 4000 FEET. BEHIND THE COLD FRONT…SNOW LEVELS WILL FALL RAPIDLY…AS LOW AS 500 FEET NORTH OF POINT CONCEPTION…AND 1000 FEET SOUTH OF POINT CONCEPTION. PRELIMINARY SNOW ESTIMATES WITH THIS UPCOMING STORM SYSTEM ARE 1 TO 2 FEET ACROSS THE MOUNTAINS ABOVE 4000 FEET…WITH LESSER ACCUMULATIONS BELOW 4000 FEET. LATE FRIDAY NIGHT INTO SATURDAY…LIGHTER SNOW ACCUMULATIONS WILL BE POSSIBLE ACROSS THE ANTELOPE VALLEY FLOOR…SANTA MONICA MOUNTAINS…AND SANTA CLARITA VALLEY. IN ADDITION…MANY FOOTHILL AND HIGHER VALLEY LOCATIONS WILL BE AT RISK FOR LIGHT SNOWFALL…ESPECIALLY THOSE COMMUNITIES NEAR THE MOUNTAINS.

IN ADDITION…STRONG SOUTHWEST WINDS GUSTING OVER 50 MPH WILL BE POSSIBLE WITH THE FRONT…POTENTIALLY CREATING BRIEF WHITEOUT CONDITIONS. AS WE DRAW CLOSER TO THE EVENT…A WINTER STORM WATCH WILL LIKELY BE POSTED FOR ALL OF THE MOUNTAINS AND POSSIBLY THE ANTELOPE VALLEY…WHILE OTHER LOWER ELEVATION LOCATIONS MAY REQUIRE WINTER WEATHER ADVISORIES.

SNOW AND ICY CONDITIONS WILL LIKELY IMPACT MANY OF OUR MAJOR MOUNTAIN ROADWAYS…INCLUDING INTERSTATE 5 FROM THE GRAPEVINE TO SANTA CLARITA…AS WELL AS HIGHWAY 14 FROM SANTA CLARITA VALLEY TO THE ANTELOPE VALLEY…INCLUDING THE SOLEDAD CANYON. DUE TO THE UNUSUALLY LOW SNOW LEVELS EXPECTED…SOME OF THE LOWER ELEVATION ROADWAYS THAT ARE ESPECIALLY AT RISK FOR SNOW INCLUDE HIGHWAY 101 (ESPECIALLY NEAR CUESTA PASS)…HIGHWAY 154…HIGHWAYS 41 AND 46 IN SAN LUIS OBISPO COUNTY…AS WELL AS HIGHWAYS 126 AND 118 IN VENTURA COUNTY.

THIS STORM HAS THE POTENTIAL TO BRING SOME OF THE LOWEST SNOW LEVELS WE HAVE SEEN IN RECENT TIMES. WITH SUCH LOW SNOW LEVELS POSSIBLE…THIS UPCOMING STORM SYSTEM COULD BE DEADLY FOR UNPREPARED MOTORISTS…CAMPERS OR HIKERS. ANYONE PLANNING TO TRAVEL INTO THE MOUNTAINS ON FRIDAY AND SATURDAY SHOULD BE PREPARED FOR WINTER STORM CONDITIONS WITH VERY COLD TEMPERATURES. REMEMBER TO ALWAYS CARRY AN EMERGENCY KIT IN YOUR CAR IN CASE YOU ENCOUNTER HAZARDOUS DRIVING CONDITIONS. STAY TUNED FOR THE LATEST NATIONAL WEATHER SERVICE FORECASTS AND STATEMENTS AS THIS UNUSUALLY COLD WINTER STORM APPROACHES THE SOUTHLAND.

$$

GOMBERG

Go To NWS Website

 

Avalanche Warning

THE FOLLOWING MESSAGE IS TRANSMITTED AT THE REQUEST OF THE NATIONAL PARK SERVICE – SEQUOIA AND KINGS CANYON NATIONAL PARKS. AN AVALANCHE WARNING CONTINUES FOR THE SIERRA NEVADA IN SEQUOIA AND KINGS CANYON NATIONAL PARKS. CONTINUED STRONG WINDS AND HEAVY SNOW HAVE CREATED A HIGH AVALANCHE DANGER. NATURAL AND HUMAN TRIGGERED AVALANCHES ARE LIKELY. BACKCOUNTRY TRAVELERS SHOULD AVOID ALL AVALANCHE TERRAIN…ESPECIALLY STEEP SLOPES WITH RECENT DEPOSITS OF WIND DRIFTED SNOW. THE AVALANCHE WARNING SHOULD CONTINUE THROUGH THE WEEKEND. THIS WARNING DOES NOT INCLUDE SKI AREAS OR HIGHWAYS WHERE AVALANCHE CONTROL IS NORMALLY DONE. FOR MORE INFORMATION VISIT WWW.AVALANCHE.ORG OR CALL 559-565-3341.

Update: High Surf Advisory

 ALTHOUGH IT IS STILL EARLY…MODELS ARE INDICATING ANOTHER LARGE WESTERLY GROUNDSWELL WILL GENERATE OUT OF THE CENTRAL PACIFIC. THIS LONG PERIOD SWELL COULD BRING THE POTENTIAL OF SURF 15 TO 20 FEET BEGINNING TUESDAY ALONG THE CENTRAL COAST. WITH A WESTERLY DIRECTION EXPECTED…WEST FACING BEACHES OF LOS ANGELES AND VENTURA COUNTIES WILL SEE SIMILAR WAVES DEVELOP BY TUESDAY EVENING BETWEEN 14 TO 17 FEET WITH LOCALLY HIGHER SETS TO 20 FEET POSSIBLE AS WELL BY TUESDAY EVENING. THESE LARGE WAVES COULD PERSIST THROUGH AT LEAST THURSDAY BEFORE DIMINISHING SOME. … HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 10 PM PST SUNDAY… A HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 10 PM PST SUNDAY. SURF BETWEEN 8 AND 12 FEET WITH MAX SETS TO NEAR 15 FEET ARE EXPECTED ALONG THE EXPOSED WEST FACING BEACHES OF THE CENTRAL COAST. THIS HIGH SURF WILL CONTINUE TO BUILD THIS MORNING…THEN PERSIST THROUGH AT LEAST SUNDAY NIGHT. IN ADDITION…STRONG RIP CURRENTS ARE LIKELY. PRECAUTIONARY/PREPAREDNESS ACTIONS… &&

 

Instruction:
.A POWERFUL PACIFIC STORM SOUTH OF ALASKA HAS GENERATED A LARGE WESTERLY SWELL. THIS LONG PERIOD SWELL WILL BEGIN TO PUSH INTO CENTRAL AND SOUTHERN CALIFORNIA THIS MORNING AND PERSIST THROUGH TONIGHT. ANOTHER STORM SYSTEM IMMEDIATELY BEHIND THE FIRST HAS GENERATED ANOTHER WESTERLY SWELL THAT WILL PUSH INTO THE AREA SATURDAY AND PERSIST THROUGH AT LEAST SUNDAY NIGHT. AS A RESULT HIGH SURF IS EXPECTED THROUGH AT SUNDAY NIGHT AND POSSIBLY INTO MONDAY WITH A HIGH RIP CURRENT POTENTIAL. EVEN THE MOST EXPERIENCED SWIMMERS SHOULD STAY OUT OF THE WATERS THROUGH THE WEEKEND. ROCKS AND JETTIES WILL BE ESPECIALLY DANGEROUS AS WAVES CAN UNEXPECTEDLY SWEEP PERSONS INTO THE WATER. EVEN THE MOST EXPERIENCED SWIMMERS SHOULD STAY OUT OF THE WATERS THROUGH THE WEEKEND. ROCKS AND JETTIES WILL BE ESPECIALLY DANGEROUS AS WAVES CAN UNEXPECTEDLY SWEEP PERSONS INTO THE WATER. A HIGH SURF ADVISORY MEANS THAT HIGH SURF WILL AFFECT BEACHES IN THE ADVISORY AREA…PRODUCING RIP CURRENTS AND LOCALIZED BEACH EROSION.

High Surf Advisory

…HIGH SURF ADVISORY IN EFFECT FROM 6 AM FRIDAY TO 10 PM PST SUNDAY… THE NATIONAL WEATHER SERVICE IN LOS ANGELES/OXNARD HAS ISSUED A HIGH SURF ADVISORY… WHICH IS IN EFFECT FROM 6 AM FRIDAY TO 10 PM PST SUNDAY. SURF BETWEEN 8 AND 12 FEET WITH MAX SETS TO NEAR 15 FEET ARE EXPECTED ALONG THE EXPOSED WEST FACING BEACHES OF THE CENTRAL COAST. THIS HIGH SURF WILL BEGIN TO BUILD LATE TONIGHT INTO FRIDAY MORNING…THEN PERSIST THROUGH AT LEAST SUNDAY NIGHT. IN ADDITION…STRONG RIP CURRENTS ARE LIKELY. PRECAUTIONARY/PREPAREDNESS ACTIONS… &&

 

Instruction:
A POWERFUL PACIFIC STORM SOUTH OF ALASKA HAS GENERATED AS LARGE WESTERLY SWELL. THIS LONG PERIOD SWELL WILL BEGIN TO PUSH INTO CENTRAL AND SOUTHERN CALIFORNIA LATER TONIGHT AND PERSIST THROUGH FRIDAY NIGHT. ANOTHER STORM SYSTEM IMMEDIATELY BEHIND THE FIRST HAS GENERATED ANOTHER WESTERLY SWELL THAT WILL PUSH INTO THE AREA SATURDAY AND PERSIST THROUGH AT LEAST SUNDAY NIGHT. AS A RESULT HIGH SURF IS EXPECTED THROUGH AT SUNDAY NIGHT AND POSSIBLY INTO MONDAY. EVEN THE MOST EXPERIENCED SWIMMERS SHOULD STAY OUT OF THE WATERS THROUGH THE WEEKEND. ROCKS AND JETTIES WILL BE ESPECIALLY DANGEROUS AS WAVES CAN UNEXPECTEDLY SWEEP PERSONS INTO THE WATER. A HIGH SURF ADVISORY MEANS THAT HIGH SURF WILL AFFECT BEACHES IN THE ADVISORY AREA…PRODUCING RIP CURRENTS AND LOCALIZED BEACH EROSION.

Rainfall Totals

NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
446 AM PST SUN DEC 13 2009

…PRELIMINARY RAINFALL TOTALS…

THE FOLLOWING ARE RAINFALL TOTALS IN INCHES
FOR THIS RAIN EVENT FROM THURSDAY AFTERNOON
THROUGH 400 AM THIS MORNING.

.LOS ANGELES COUNTY METROPOLITAN

HAWTHORNE (KHHR)……………… 1.07
LOS ANGELES AP (KLAX)…………. 0.96
DOWNTOWN LOS ANGELES………….. 1.62
LONG BEACH (KLGB)…………….. 0.92
MONTE NIDO FS………………… 3.70
BIG ROCK MESA………………… 2.36
BEL AIR HOTEL………………… 2.68
BALLONA CK @ SAWTELLE…………. 1.30
HOLLYWOOD RSVR……………….. 2.72
L.A. R @ FIRESTONE……………. 1.20
DOMINGUEZ WATER CO……………. 0.79
LA HABRA HEIGHTS……………… 1.57

.LOS ANGELES COUNTY VALLEYS

BURBANK (KBUR)……………….. 1.87
VAN NUYS (KVNY)………………. 1.80
AGOURA………………………. 1.97
CHATSWORTH RSVR………………. 1.80
SEPULVEDA CYN @ MULHL…………. 3.47
PACOIMA DAM………………….. 2.76
HANSEN DAM…………………… 1.89
SAUGUS………………………. 1.36
DEL VALLE……………………. 2.26

.LOS ANGELES COUNTY SAN GABRIEL VALLEY

EAGLE ROCK RSRV………………. 2.52
EATON WASH @ LOFTUS…………… 2.40
SAN GABRIEL R @ VLY…………… 1.73
EATON DAM……………………. 3.94
WALNUT CK S.B………………… 2.13
SANTA FE DAM…………………. 2.47
WHITTIER HILLS……………….. 1.93
CLAREMONT……………………. 2.86

.LOS ANGELES COUNTY MOUNTAINS AND FOOTHILLS

SANDBERG (KSDB)………………. 1.03
MOUNT WILSON CBS……………… 4.66
W FK HELIPORT………………… 6.10
SANTA ANITA DAM………………. 4.21
SAN GABRIEL DAM………………. 5.24
MORRIS DAM…………………… 3.90
BIG DALTON DAM……………….. 3.86
SIERRA MADRE MAINT YD…………. 3.84
TANBARK……………………… 5.81
SAN ANTONIO DAM………………. 3.90
CHILAO………………………. 1.86
MT BALDY FS………………….. 5.52
WHITAKER PEAK………………… 2.12
WARM SPRINGS…………………. 3.70
ACTON……………………….. 1.07
CAMP 9………………………. 3.97

.LOS ANGELES COUNTY DESERTS

LANCASTER (KWJF)……………… 0.75
PALMDALE (KPMD)………………. 0.74
PALMDALE WATER DIST…………… 0.82
LANCASTER……………………. 0.71

Go to Top