High Wind Watch 5, NWS San Diego, CA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
930 AM PST FRI FEB 22 2013

.SYNOPSIS...
IT WILL BE SUNNY AND A BIT WARMER TODAY UNDER NORTHWEST FLOW ALOFT.
A TROUGH OF LOW PRESSURE WILL SLIDE SOUTHEAST THROUGH THE GREAT
BASIN OVER THE WEEKEND...GENERATING GUSTY WESTERLY WINDS SATURDAY
AFTERNOON...ESPECIALLY IN THE HIGH DESERTS. OFFSHORE FLOW WILL
DEVELOP SATURDAY NIGHT AND CONTINUE SUNDAY AND WILL BRING STRONG
GUSTY WINDS THROUGH AND BELOW PASSES AND CANYONS. THERE WILL BE
GRADUAL WARMING NEXT WEEK AS HIGH PRESSURE BUILDS EAST OFF THE
PACIFIC AND DRY OFFSHORE FLOW PREVAILS.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

SKIES WERE CLEAR THIS MORNING EXCEPT FOR DISSIPATING CIRRUS. 12Z NKX
SOUNDING SHOWED GENERALLY 2-3 DEG C WARMING BELOW 850 MB...SO WITH
THE SUNSHINE AND WARMER PROFILE...EXPECT TEMPS TO BE A LITTLE
HIGHER...IN THE 60S AT PRETTY MUCH ALL ELEVATIONS BELOW ABOUT 2000
FT. IT SHOULD BE A BIT WARMER TONIGHT...THOUGH PATCHY FROST IS STILL
EXPECTED IN SOME INLAND VALLEY LOCATIONS.

A BROAD HIGH PRESSURE RIDGE WAS CENTERED AROUND 150 DEG W WITH THE
NEXT SHORTWAVE MOVING OUT OF THE GULF OF ALASKA...AROUND 50N/135W.
THIS SHORTWAVE WILL CONTINUE TO MOVE SE AND WILL ARRIVE IN THE GREAT
BASIN SATURDAY. THE WAVE WILL BE TOO FAR NE FOR ANY PRECIP...BUT
ONSHORE FLOW WILL DEVELOP SATURDAY AND COULD GET STRONG OVER THE
HIGH DESERTS DUE TO TIGHTENING SURFACE PRESSURE GRADIENTS AS NAM4
SHOWS ABOUT A 6 MB GRADIENT FROM BFL TO DAG. A WIND ADVISORY MAY BE
NEEDED THERE DUE TO GUST POTENTIAL AROUND 45 MPH. WITH THE ONSHORE
FLOW SATURDAY...THERE COULD BE A BRIEF APPEARANCE OF STRATUS/FOG
NEAR THE COAST LATE SATURDAY/SATURDAY EVENING BEFORE WE SWITCH TO
OFFSHORE FLOW. THE MORE SUBSTANTIAL WINDS WILL COME SATURDAY
NIGHT/SUNDAY WITH THE OFFSHORE FLOW...STARTING AROUND 10 PM IN SAN
BERNARDINO COUNTY AND A FEW HOURS LATER IN SAN DIEGO COUNTY AND
CONTINUING INTO EARLY SUNDAY AFTERNOON. THIS COULD BRING GUSTS OVER
60 MPH TO WINDIER LOCATIONS...AND A HIGH WIND WATCH WILL BE ISSUED
IN THE NEXT FEW HOURS LATE SAT NIGHT/SUNDAY. THIS WILL PRIMARILY BE
DRIVEN BY THE SURFACE PRESSURE GRADIENTS...WITH UP TO AN 18 MB
GRADIENT FROM NE NEVADA TO SAN DIEGO...AND ALSO STRONG THERMAL
GRADIENTS OVER THE MTNS...LOCALLY OVER 10 DEG C AT 850 MB BETWEEN
THE NE AND SW SLOPES OVER BOTH SAN BERNARDINO AND SAN DIEGO COUNTY.
THE MTN WAVES ARE MINIMAL THOUGH...SO THIS WILL BE A SITUATION WHERE
THERE WILL BE WIDESPREAD MODERATELY STRONG WINDS WITH DAMAGING GUSTS
MOSTLY BELOW THE CAJON PASS...SAN GORGONIO PASS...SAN DIEGO COUNTY
MTNS AND SANTA ANA MTNS. WINDS SHOULD DECREASE SUNDAY
AFTERNOON/NIGHT.

ANOTHER WAVE WILL MOVE BY TO THE NE LATE MONDAY/EARLY TUESDAY...BUT
MODELS CONTINUE TO TREND WEAKER WITH THIS. NE WINDS FOLLOWING THIS
WAVE WILL BE WEAKER DUE TO TEMP/PRESSURE GRADIENTS LOWERING BY
ALMOST HALF. THE RIDGE OVER THE EAST PAC WILL GRADUALLY BUILD INTO
CALIFORNIA NEXT WEEK AND RESULT IN A WARMING TREND...WHILE THE
MOSTLY OFFSHORE FLOW WILL KEEP THE MARINE LAYER AWAY.

&&

.AVIATION...
221548Z...UNRESTRICTED VIS AND MOSTLY SKC THROUGH SATURDAY MORNING.
SLIGHT CHANCE OF SCT-BKN LOW CLDS/FOG ALONG THE IMMEDIATE COAST
DURING THE 23/0600-1400 UTC TIME PERIOD...BUT CONFIDENCE TOO LOW TO
INCLUDE IN KSAN/KCRQ/KSNA TAFS.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...NONE YET...BUT HIGH WIND WATCH IS
PROPOSED FOR LATE SATURDAY NIGHT/SUNDAY FOR THE SAN BERNARDINO
COUNTY MTNS...INLAND EMPIRE...SANTA ANA MTNS/FOOTHILLS AND SAN DIEGO
COUNTY MTNS.

&&

PUBLIC...MAXWELL
AVIATION/MARINE...HARRISON

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN DIEGO CA
400 AM PST FRI FEB 22 2013

CAZ042-043-048-050-055>058-060>062-PZZ750-775-230200-
ORANGE COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS-SAN
BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE-SAN DIEGO
COUNTY VALLEYS-SAN BERNARDINO COUNTY MOUNTAINS-RIVERSIDE COUNTY
MOUNTAINS-SANTA ANA MOUNTAINS AND FOOTHILLS-SAN DIEGO COUNTY
MOUNTAINS-APPLE AND LUCERNE VALLEYS-COACHELLA VALLEY-SAN DIEGO
COUNTY DESERTS-COASTAL WATERS FROM SAN MATEO POINT TO THE MEXICAN
BORDER AND OUT 30 NM-WATERS FROM SAN MATEO POINT TO THE MEXICAN
BORDER EXTENDING 30 TO 60 NM OUT INCLUDING SAN CLEMENTE ISLAND-
400 AM PST FRI FEB 22 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ALL OF EXTREME
SOUTHWESTERN CALIFORNIA.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

SATURDAY...ONSHORE WESTERLY WINDS WILL BECOME STRONG AND GUSTY IN
THE MOUNTAINS AND DESERTS BY AFTERNOON WITH LOCAL GUSTS TO 45 MPH.

SATURDAY NIGHT AND SUNDAY...LOCALLY STRONG AND GUSTY NORTHEASTERLY
WINDS FROM 20 TO 35 MPH WITH ISOLATED GUSTS TO 55 MPH THROUGH AND
BELOW THE WINDIER PASSES AND CANYONS.

.SPOTTER INFORMATION STATEMENT...
SKYWARN WEATHER ACTIVATION IS NOT REQUESTED FOR THIS AREA...
HOWEVER WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT
WEATHER CONDITIONS.

JAD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN DIEGO CA
1139 AM PST FRI FEB 22 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0850 AM     NON-TSTM WND GST 51 WSW LA JOLLA         32.49N 118.03W
02/20/2013  M43.00 MPH       PZZ775             XX   BUOY

            SAN CLEMENTE BASIN BUOY 46086 REPORTED WIND GUSTS OF 34
            KNOTS OR GREATER BETWEEN 350 AM AND 850 AM WEDNESDAY
            MORNING...WITH A PEAK WIND GUST OF 37 KNOTS...OR 43
            MPH...REPORTED AT 350 AM AND 550 AM.

&&

SHARRISO