Small Craft Advisory 12, NWS San Diego, CA

871 
WHUS76 KSGX 260900
MWWSGX

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN DIEGO CA
200 AM PDT TUE APR 26 2016


PZZ775-261000-
/O.EXP.KSGX.SC.Y.0012.000000T0000Z-160426T0900Z/
WATERS FROM SAN MATEO POINT TO THE MEXICAN BORDER EXTENDING 30 TO
60 NM OUT INCLUDING SAN CLEMENTE ISLAND-
200 AM PDT TUE APR 26 2016

...SMALL CRAFT ADVISORY HAS EXPIRED...

WINDS HAVE DECREASED AND WAVES WILL ALSO DIMINISH THIS MORNING.

$$

MM

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
930 PM PDT MON APR 25 2016

.SYNOPSIS...
FAIR WEATHER WILL RETURN THE REST OF TONIGHT WITH LIGHTER WINDS AND
ONLY A FEW AREAS OF LOW CLOUDS AS THE TROUGH OF LOW PRESSURE HAS
MOVED EAST OF THE AREA. SLIGHT WARMING WILL OCCUR TUESDAY AND
WEDNESDAY UNDER A WEAK HIGH PRESSURE RIDGE. ANOTHER LOW PRESSURE
SYSTEM WILL MOVE THROUGH SOUTHERN CALIFORNIA WEDNESDAY NIGHT THROUGH
EARLY FRIDAY AND BRING A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS...ALONG WITH COOLER WEATHER. A RIDGE WILL BUILD OFF
THE COAST OVER THE WEEKEND AND EARLY NEXT WEEK AND BRING WARMING.

&&

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

THE TROUGH AXIS HAS NOW PASSED TO OUR EAST...AND A RAPID CHANGE IN
WEATHER HAS OCCURRED AS THE SHOWERS AND THUNDERSTORMS THAT WERE MOST
CONCENTRATED IN THE SAN BERNARDINO/RIVERSIDE COUNTY MOUNTAINS AND
INLAND EMPIRE DISSIPATED ENTIRELY A LITTLE AFTER 800 PM. WINDS HAVE
DIMINISHED RAPIDLY IN MOST AREAS AS WELL...WITH GUSTS NOW MOSTLY
BELOW 40 MPH IN THE MOUNTAINS AND DESERTS...AND BELOW 30
MPH NEAR THE COAST...WITH MANY AREAS NOW HAVING LIGHT WINDS. SKIES
HAD BECOME MOSTLY CLEAR NORTH OF SAN DIEGO COUNTY...THOUGH SOME
CLOUDS REMAIN IN SAN DIEGO COUNTY. LOW CLOUDS WILL BE PATCHY
OVERNIGHT AND MOSTLY IN THE SAN DIEGO COUNTY VALLEYS AND
MOUNTAINS...WITH DECREASING FOG.

FAIR WEATHER WILL PREVAIL TUE/WED...THOUGH SOME LOCALLY GUSTY WINDS
WILL OCCUR MAINLY IN THE AFTERNOONS/EVENINGS ON THE DESERT MOUNTAIN
SLOPES AND ADJACENT DESERT LOCATIONS...WITH LOCAL GUSTS 40+
MPH...EXCEPT STRONGER...POSSIBLY TO 60 MPH...WED EVENING WHEN A WIND
ADVISORY WILL LIKELY BE NEEDED AS THE HEIGHT/TEMP GRADIENTS ALOFT
INCREASE WITH THE APPROACHING UPPER LOW. THIS LOW...CURRENTLY SOUTH
OF THE ALEUTIANS...WILL LIKELY BECOME A CLOSED LOW OVER THE MOJAVE
DESERT BY THU. MOISTURE WILL BE SOMEWHAT LIMITED WITH THIS
SYSTEM...WITH MOSTLY NORTHWEST FLOW OVER THE COASTAL WATERS LIMITING
THE OVERWATER TRAJECTORY...AND MOISTURE WILL NOT GO VERY DEEP
EITHER...SO PRECIPITABLE WATER WILL BE IN THE 0.6 TO 0.8 INCH RANGE
MOSTLY...THOUGH THAT IS MORE THAN OUR NKX MONDAY AFTERNOON SOUNDING
WITH 0.47 IN. INSTABILITY COULD BE SIGNIFICANT THOUGH AS 500 MB
TEMPS COULD FALL BELOW -20 C...SO THUNDERSTORMS WILL BE POSSIBLE
ESPECIALLY THU. PRECIP AMOUNTS WILL BE DIFFICULT TO FORECAST DUE TO
THE CONVECTIVE NATURE OF THE STORMS...BUT LOCAL AMOUNTS OVER 1/2
INCH COULD OCCUR.

AFTER THAT SYSTEM MOVES EAST FRIDAY...A RIDGE WILL BUILD OFF THE
COAST...THOUGH ANOTHER FAIRLY STRONG UPPER LOW WILL MOVE SOUTHEAST
OVER THE WEEKEND INTO THE INTERIOR WEST...MAINLY UTAH AND COLORADO.
MODEL RUNS SHOW THAT THE LOW SHOULD BE FAR ENOUGH E/NE SO THAT OUR
WEATHER WILL REMAIN FAIR WITH WARMING BACK TO NEAR OR SLIGHTLY
ABOVE NORMAL.

&&

.AVIATION...
260400Z...COAST/VALLEYS...VARIABLE LOW CLOUD BASES OF 3000-5500 FT
MSL...WILL CONTINUE MOST AREAS WEST OF THE MOUNTAINS TONIGHT, THEN
MOVE TO MAINLY ALONG THE COAST BY TUE MORNING. WESTERLY WIND GUSTS
OF 30-40 KT WILL CONTINUE OVER THE MTNS AND DESERTS OVERNIGHT. LLWS,
ROTORS AND UDDFS ARE POSSIBLE IN THE LEE OF THE MTNS THROUGH THE
PERIOD. FEW/SCT LOW CLOUDS WEST OF THE MTNS TUE AFTERNOON.

&&

.MARINE...
900 PM...GALE FORCE CONDITIONS WILL PERSIST OVER THE COASTAL WATERS
INTO LATE THIS EVENING. NORTHWEST WIND GUSTS TO 35 KT ARE EXPECTED,
WITH A STEEP COMBINED SEAS OF 9 TO 14 FT. THE WINDS WILL FALL BELOW
GALE FORCE TUESDAY...HOWEVER WINDS WILL BE BREEZY AT TIMES AND THE
SEAS WILL REMAIN STEEP. WINDS WILL STRENGTHEN WEDNESDAY INTO
THURSDAY AS A DISTURBANCE MOVES ACROSS THE REGION, WITH SHOWERS
POSSIBLE THURSDAY. LOWERING SEAS AND WEAKER WINDS ARE EXPECTED
FRIDAY THROUGH THE WEEKEND. SEE THE GALE WARNING...LAXMWWSGX...FOR
MORE DETAILS.

&&

.BEACHES...
900 PM...A LARGE/SHORT PERIOD NW SWELL WILL CONTINUE CHOPPY 3 TO 5
FT SURF AT THE BEACHES WITH LOCAL SETS TO 7 FT POSSIBLE OVER
SOUTHERN SD COUNTY. STRONG RIP CURRENTS WILL BE POSSIBLE AS WELL.
PLEASE SEE THE BEACH HAZARD STATEMENT...LAXCFWSGX...FOR ADDITIONAL
DETAILS.

&&

.SKYWARN...
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT THROUGH TUESDAY EVENING FOR ORANGE
     COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...GALE WARNING UNTIL 11 PM PDT THIS EVENING FOR COASTAL WATERS
     FROM SAN MATEO POINT TO THE MEXICAN BORDER AND OUT TO 30 NM-
     WATERS FROM SAN MATEO POINT TO THE MEXICAN BORDER EXTENDING
     30 TO 60 NM OUT INCLUDING SAN CLEMENTE ISLAND.

&&

PUBLIC...MAXWELL
AVIATION/MARINE/BEACHES...JJT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN DIEGO CA
611 PM PDT MON APR 25 2016

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

0400 PM     HAIL             WRIGHTWOOD              34.36N 117.64W
04/25/2016  E0.25 INCH       SAN BERNARDINO     CA   TRAINED SPOTTER

&&

BM