High Wind Watch 14, NWS San Diego, CA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
200 PM PST TUE DEC 23 2014

.SYNOPSIS...
WEAKENING UPPER LEVEL HIGH PRESSURE WILL ALLOW A SLIGHT COOLING ON
WEDNESDAY. SURFACE HIGH PRESSURE OVER NEVADA AND UTAH WILL BRING
LOCALLY STRONG...GUSTY NORTHEAST WINDS TO THE COASTAL SLOPES OF THE
MOUNTAINS AND ADJACENT FOOTHILL AREAS...GRADUALLY DECREASING THIS
AFTERNOON THROUGH LATE TONIGHT. A LOW PRESSURE SYSTEM PASSING BY TO
THE NORTH WILL RESULT IN COOLING AND STRONG GUSTY WEST WINDS FOR THE
MOUNTAINS AND DESERTS LATE WEDNESDAY NIGHT INTO CHRISTMAS DAY...WITH
A SLIGHT CHANCE OF SHOWERS ALONG AND WEST OF THE MOUNTAINS.
CONTINUED COOL CONDITIONS WITH PERIODS OF STRONG GUSTY NORTHEAST
WINDS FOR FRIDAY AND SATURDAY.

&&

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

.SHORT TERM (TODAY THROUGH CHRISTMAS)...
SURFACE HIGH PRESSURE OVER THE GREAT BASIN CONTINUES TO BRING
LOCALLY STRONG GUSTY SANTA ANA WINDS TO THE COASTAL SLOPES OF THE
MOUNTAINS AND ADJACENT FOOTHILL AREAS. THE WINDS ARE EXPECTED TO
GRADUALLY SUBSIDE THIS AFTERNOON THROUGH LATE TONIGHT.

A FEW DEGREES OF COOLING IS EXPECTED ALONG AND WEST OF THE MOUNTAINS
FOR WEDNESDAY AS OFFSHORE FLOW WEAKENS AND HIGH PRESSURE ALOFT
WEAKENS. BUFKIT SHOWS LESS MARINE LAYER TONIGHT COMPARED TO THIS
MORNING...BUT ALONG WITH THE HRRR AND THE WRFEMS...AND SUPPORT FROM
THE VISIBLE SATELLITE IMAGERY...THERE COULD BE SOME PATCHY DENSE
FOG. THIS HAS BEEN ADDED TO THE FORECASTS FOR THIS AFTERNOON THROUGH
WEDNESDAY MORNING.

FOR WEDNESDAY NIGHT INTO CHRISTMAS DAY...A TROUGH WILL BRING A
RETURN OF ONSHORE FLOW WITH COOLING AND STRONG GUSTY WEST WINDS FOR
THE MOUNTAINS AND DESERTS FOR LATE WEDNESDAY NIGHT INTO CHRISTMAS
MORNING. A SLIGHT CHANCE OF MAINLY LIGHT SHOWERS ALONG AND WEST OF
THE MOUNTAINS FOR LATE WEDNESDAY NIGHT INTO CHRISTMAS MORNING IS
EXPECTED. A DUSTING OF SNOWFALL IS POSSIBLE IN THE MOUNTAINS...
MAINLY ABOVE 6000 TO 6500 FEET.

&&

.LONG TERM (FRIDAY THROUGH MONDAY)...
CONTINUE COOL FRIDAY THROUGH MONDAY WITH HIGH TEMPERATURES ONLY
AROUND 5 DEGREES BELOW AVERAGE. SURFACE HIGH PRESSURE OVER THE GREAT
BASIN WILL DEVELOP ONCE AGAIN FOR PERIODS OF STRONG GUSTY NORTHEAST
WINDS FRIDAY AND SATURDAY. ANOTHER COLD LOW PRESSURE SYSTEM MOVING
SOUTHWARD THROUGH THE WESTERN STATES FOR SUNDAY THROUGH TUESDAY...AS
SEEN IN THE GFS ENSEMBLE MEAN...COULD BRING A RETURN OF ONSHORE FLOW
EARLY MONDAY WITH A SLIGHT CHANCE OF SHOWERS FOLLOWED BY GUSTY NORTH
TO NORTHEAST WINDS FOR TUESDAY AND WEDNESDAY...AND CONTINUED RATHER
COOL CONDITIONS.

&&

.AVIATION...
232130Z...SKC CONDS WITH P6SM WILL CONTINUE THROUGH WEDNESDAY WITH
THE EXCEPTION OF PATCHY LOW CLOUDS AND FOG FORMING ON THE IMMEDIATE
COASTLINE TONIGHT.

GUSTY NE WINDS WILL CONTINUE THROUGH TONIGHT ALONG THE COASTAL
FOOTHILLS OF SAN DIEGO COUNTY...NORTHWESTERN PORTIONS OF THE INLAND
EMPIRE...AND THE SANTA ANA MOUNTAINS. AREAS OF LLWS AND MOD-STG
UDDFS POSSIBLE OVER AND SW OF THE MTNS...INCLUDING VCNTY KONT AND
KSNA. NE-E WINDS WILL WEAKEN SLIGHTLY WEAKEN BY WEDNESDAY MORNING.

&&

.MARINE...
100 PM...BRIEF PATCHY DENSE FOG MAY OCCUR THIS AFTERNOON THROUGH
TONIGHT OVER THE COASTAL WATERS. A TROUGH OF LOW PRESSURE MOVING
INLAND WED NIGHT INTO THU WILL BRING GUSTY WEST-NORTHWEST WINDS TO
THE COASTAL WATERS. WIND GUSTS OF 20-25 KT ARE LIKELY OVER THE
COASTAL WATERS WED NIGHT INTO THU AFTERNOON. WINDS WILL WEAKEN THU
NIGHT. NO HAZARDOUS MARINE WEATHER FRI-SAT.

&&

.FIRE WEATHER...
SURFACE HIGH PRESSURE OVER THE GREAT BASIN WILL WEAKEN THROUGH
WEDNESDAY. THIS FEATURE SHALL CONTINUE THE WEAK TO MODERATE OFFSHORE
FLOW AND ABOVE NORMAL HIGH TEMPERATURES WEST OF THE MOUNTAINS. FROM
WEDNESDAY NIGHT INTO THURSDAY MORNING A TROUGH OF LOW PRESSURE WILL
BRING ONSHORE WINDS OF MODERATE STRENGTH...INCREASING RH...LOWER
HIGH TEMPS...AND A SLIGHT CHANCE OF LIGHT RAIN SHOWERS OVER AND WEST
OF THE MOUNTAINS. OFFSHORE FLOW WILL RETURN FRIDAY INTO SATURDAY
WITH TEMPERATURES REMAINING AT OR BELOW NORMAL.

&&

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

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...WIND ADVISORY UNTIL 6 PM PST THIS EVENING FOR THE ORANGE COUNTY
     COASTAL AREAS...RIVERSIDE COUNTY MOUNTAINS...SAN BERNARDINO
     COUNTY MOUNTAINS...SAN BERNARDINO AND RIVERSIDE COUNTY
     VALLEYS-THE INLAND EMPIRE...SAN DIEGO COUNTY MOUNTAINS...
     SAN DIEGO COUNTY VALLEYS...SANTA ANA MOUNTAINS AND
     FOOTHILLS.

PZ...NONE.

&&

PUBLIC...SMALL
FIRE WEATHER...JT
AVIATION/MARINE...JT

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE SAN DIEGO CA
738 PM PST TUE DEC 23 2014

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

0159 AM     NON-TSTM WND GST 8 N PORTOLA HILLS       33.80N 117.62W
12/23/2014  M70 MPH          ORANGE             CA   MESONET

            MESONET STATION PLEASANTS PEAK /EW3131/

0251 AM     NON-TSTM WND GST 6 ENE TUSTIN FOOTHILLS  33.81N 117.71W
12/23/2014  M67 MPH          ORANGE             CA   MESONET

            MESONET STATION FREMONT CANYON /FRCC1/

0640 AM     NON-TSTM WND GST 9 SSW JULIAN            32.95N 116.64W
12/23/2014  M60 MPH          SAN DIEGO          CA   MESONET

            MESONET STATION SILL HILL /SILSD/

0900 AM     NON-TSTM WND GST 8 NE CAMPO              32.70N 116.35W
12/23/2014  M52 MPH          SAN DIEGO          CA   MESONET

            MESONET STATION CRESTWOOD /CWDSD/

0800 AM     NON-TSTM WND GST 6 S PINE VALLEY         32.76N 116.49W
12/23/2014  M52 MPH          SAN DIEGO          CA   MESONET

            MESONET STATION BUCKMAN SPRINGS /BMSSD/

0940 AM     NON-TSTM WND GST 7 NNE CAMPO             32.71N 116.40W
12/23/2014  M50 MPH          SAN DIEGO          CA   MESONET

            MESONET STATION LA POSTA /LPTSD/

&&

NWS SAN DIEGO CA
IRIS SYSTEM