Wind Advisory 30, NWS San Diego, CA

765 
WWUS76 KSGX 131254
NPWSGX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN DIEGO CA
554 AM PDT SUN APR 13 2014

...STRONG GUSTY WEST WINDS IN THE COACHELLA VALLEY WILL GRADUALLY
DIMINISH THIS MORNING...

.ONSHORE FLOW IS SLOWLY WEAKENING. GUSTY WEST TO NORTHWEST
WINDS IN THE COACHELLA VALLEY WILL GRADUALLY DIMINISH THIS
MORNING. 

CAZ061-131400-
/O.CAN.KSGX.WI.Y.0030.000000T0000Z-140413T1300Z/
COACHELLA VALLEY-
554 AM PDT SUN APR 13 2014

...WIND ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS CANCELLED THE WIND
ADVISORY. 

GUSTY WEST TO NORTHWEST WINDS IN THE COACHELLA VALLEY WILL
GRADUALLY DIMINISH THIS MORNING.

$$

17

AREA FORECAST DISCUSSION...CORRECTED
NATIONAL WEATHER SERVICE SAN DIEGO CA
952 PM PDT SAT APR 12 2014

.SYNOPSIS...
LOW PRESSURE OVER THE GREAT BASIN WILL GENERATE STRONG WINDS
OVERNIGHT INTO SUNDAY MORNING OVER MOUNTAIN AND DESERT AREAS. THE
STRONG ONSHORE FLOW WILL KEEP A DEEP MARINE LAYER IN PLACE WEST OF
THE MOUNTAINS ON SUNDAY...AND TEMPERATURES BELOW NORMAL. DRY AND
WARMER MONDAY AND TUESDAY AS THE ONSHORE WEAKENS AND TURNS BRIEFLY
OFFSHORE...SHRINKING THE MARINE LAYER BACK TO THE IMMEDIATE COAST.
COOLER AGAIN BY MIDWEEK WITH AREAS OF NIGHT AND MORNING LOW CLOUDS
AND FOG RETURNING WEST OF THE MOUNTAINS AS A BROAD LOW PRESSURE
TROUGH DEVELOPS OVER THE WEST AND ONSHORE FLOW STRENGTHENS.

&&

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

MARINE CLOUDS WERE DEVELOPING RAPIDLY INLAND TO THE COASTAL SLOPES
THROUGH 03Z THANKS TO STRONG ONSHORE SFC PRESSURE GRADIENTS OF
AROUND 10 MBS TO THE DESERTS. WIDESPREAD WESTERLY WINDS OF 20 TO 35
MPH WERE REPORTED ACROSS THE DESERTS. TODAY WITH PEAK WIND GUSTS
OVER 50 MPH BELOW THE BANNING PASS AREA INTO THE EASTERN COACHELLA
VALLEY. A WIND ADVISORY IS IN EFFECT FOR THE LOWER DESERTS THROUGH 3
AM SUN MORNING.

A LOW PRESSURE TROUGH ALOFT DROPPING SOUTH THROUGH THE GREAT BASIN
WAS SUPPORTING A 999 MB SFC LOW OVER SOUTHERN NV AT 03Z...AND GUSTY
ONSHORE FLOW OVER THE MOUNTAIN RIDGES/PASSES AND INTO THE DESERTS OF
SOCAL. WINDS WILL REMAIN STRONG AND GUSTY...ESPECIALLY THROUGH WIND
PRONE AREAS INTO SUN MORNING...WITH LOCAL BLOWING DUST AND SAND IN
THE DESERTS. THE WINDS WILL SUBSIDE ON SUN AS THE SURFACE LOW
GRADUALLY WEAKENS. A FAIRLY DEEP MARINE LAYER WEST OF THE MOUNTAINS
WILL CONTINUE PERIODS OF MARINE CLOUDS AND BELOW NORMAL TEMPERATURES
THROUGH SUN NIGHT....FOLLOWED BY A SHARP WARM-UP WEST OF THE
MOUNTAINS AS WINDS SWING BACK OFFSHORE FOR A TIME ON MON MORNING.

WEAK...PROGRESSIVE RIDGING ACROSS THE WEST ON MON/TUE WILL RESULT IN
DRY AND SEASONALLY WARM SPRING WEATHER WITH LOCALLY GUSTY EASTERLY
WINDS BELOW THE PASSES AND CANYONS ON MON. THE RIDGE WILL GIVE WAY
TO A BROAD TROUGH ACROSS THE CONTINENT AGAIN BY WED. ONSHORE FLOW
WILL ACCELERATE AND THE MARINE LAYER WILL DEEPEN...SENDING LOW
CLOUDS AND FOG INLAND...AND PULLING MAX DAYTIME TEMPS BACK CLOSER TO
AVERAGE UNTIL NEXT WEEKEND WHEN SOME RIDGING IS FORECAST TO BUILD
BACK ACROSS THE SOUTHWEST.

&&

.AVIATION...
130300Z...COAST/VALLEYS...LOW CLOUDS WITH BKN-OVC CIGS 2000-3000 FT
MSL AND TOPS TO 3500 FT MSL HAVE RETURNED TO THE COASTAL AREAS AND
WILL CONTINUE TO SPREAD INLAND TO THE COASTAL SLOPES AND INLAND
EMPIRE OVERNIGHT...OBSCURING HIGHER TERRAIN AND REDUCING VIS WHERE
CLOUDS AND TERRAIN INTERSECT. LOW CLOUDS EXPECTED TO BE SOMEWHAT
SLOW TO SCATTER OUT SUNDAY MORNING...LIKELY BETWEEN 13/18-20Z.

MTNS/DESERTS...W-NW WINDS 20-30 KT WITH GUSTS 40 KT TO LOCALLY 50 KT
BELOW THE BANNING PASS...WILL CREATE MOD-STG UDDFS AND LLWS OVER AND
E OF THE MTNS THROUGH SUNDAY MORNING. WINDS WILL RELAX DURING THE
DAY SUNDAY BEFORE INCREASING AGAIN FROM THE NORTHEAST LATE SUNDAY
NIGHT THROUGH MONDAY MORNING.

&&

.MARINE...
WAVE MODELS INDICATE A 6 TO 8 FOOT SWELL WITH 10 SECOND PERIOD
MOVING THROUGH THE OUTER WATERS BRIEFLY WED MORNING. THIS ALONG WITH
A LITTLE INCREASE IN THE NW WIND COULD CREATE CHOPPY CONDITIONS FOR
BOATERS.

OTHERWISE...NO SIGNIFICANT MARINE WEATHER CONDITIONS ARE EXPECTED
THROUGH FRIDAY.

&&

.FIRE WEATHER...
A BRIEF PERIOD OF GUSTY OFFSHORE FLOW WILL DEVELOP ON MONDAY BELOW
THE PASSES AND CANYONS AND ALONG THE COASTAL FOOTHILLS...ACCOMPANIED
BY MIN RH VALUES OF 10-15 PERCENT. LOCAL WINDS OF 25 TO 35 MPH WITH
GUSTS OF 45 TO 55 MPH ARE POSSIBLE IN THE WINDIEST SPOTS WHICH MAY
CREATE SEVERAL HOURS OF CRITICAL FIRE WEATHER CONDITIONS MON
AFTERNOON.

THE WINDS WILL SUBSIDE RAPIDLY MON EVENING...BUT RH WILL RECOVER
ONLY MODESTLY MON NIGHT BEFORE FALLING TO 5-15 PERCENT BY TUE
AFTERNOON. IN ADDITION...STRONG ONSHORE WINDS WILL DEVELOP OVER THE
RIDGES AND INTO THE DESERTS WHEN CRITICAL THRESHOLDS MAY BE REACHED
AGAIN FOR A FEW HOURS LATE IN THE DAY ON THE RIDGES...DESERT SLOPES
AND FOOTHILLS AS WESTERLY WIND GUSTS INCREASE TO 30 TO 40 MPH.

&&

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

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...WIND ADVISORY UNTIL 3 AM PDT SUNDAY FOR THE COACHELLA VALLEY...
     RIVERSIDE COUNTY MOUNTAINS...SAN DIEGO COUNTY DESERTS...SAN
     DIEGO COUNTY MOUNTAINS.

PZ...NONE.

&&

PUBLIC/FIRE WEATHER...JAD
AVIATION/MARINE...TS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN DIEGO CA
242 AM PDT SUN APR 13 2014

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

0150 AM     NON-TSTM WND GST 7 ENE CABAZON           33.95N 116.66W
04/13/2014  M64 MPH          RIVERSIDE          CA   MESONET

            SUSTAINED WINDS OF 30 MPH OR GREATER SINCE
            957 AM PDT SATURDAY MORNING...AND SUSTAINED
            WINDS OF 40 MPH OR GREATER SINCE 650 PM PDT
            SATURDAY EVENING. MESONET STATION WHITEWATER
            RAWS /WWAC1/

&&

NWS SAN DIEGO CA
IRIS SYSTEM