Area Forecast Discussion
Issued by NWS San Diego, CA

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000
FXUS66 KSGX 301028
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
328 AM PDT SUN AUG 30 2015

.SYNOPSIS...
A TROUGH OF LOW PRESSURE WILL DEVELOP NEAR THE WEST COAST BRINGING
COOLING TO A LITTLE BELOW AVERAGE FOR THE MIDDLE TO LATTER PART OF
THE WEEK FOLLOWED BY SLOW WARMING NEXT WEEKEND. THE MARINE LAYER
WILL DEEPEN WITH NIGHT AND MORNING LOW CLOUDS AND PATCHY FOG
EXTENDING INTO THE FAR INLAND VALLEYS FOR THE MIDDLE TO LATTER
PART OF THE WEEK. STRONGER ONSHORE WILL BRING GUSTY WEST WINDS TO
THE MOUNTAINS AND DESERTS EACH LATE AFTERNOON THROUGH LATE
EVENING.

&&

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

A TROUGH OF LOW PRESSURE DEVELOPING NEAR THE WEST COAST WILL BRING
COOLING TO A LITTLE BELOW AVERAGE FOR THE MIDDLE TO LATTER PART OF
THE WEEK FOLLOWED BY SLOW WARMING NEXT WEEKEND. SATURDAY WAS A FEW
DEGREES COOLER FOR MOST AREAS EXCEPT THE LOWER DESERTS WHICH WERE
SLIGHTLY WARMER. AROUND 5 DEGREES OF COOLING IS EXPECTED FOR MOST
AREAS TODAY FOLLOWED BY CONTINUED SLOW COOLING FOR MONDAY AND
TUESDAY.

SATELLITE IMAGERY SHOWS COASTAL STRATUS WITH SLIGHTLY GREATER
COVERAGE THAN 24 HOURS AGO WITH GREATEST COVERAGE IN A SIMILAR
AREA...ALONG THE NORTHERN SAN DIEGO COUNTY COAST. STRATUS IS
EXPECTED TO CONTINUE TO DEVELOP NEAR THE COAST THROUGH SUNRISE
WITH A LITTLE GREATER COVERAGE THAN SATURDAY MORNING. DEEPENING OF
THE MARINE LAYER IS EXPECTED THE NIGHT FEW NIGHTS WITH COASTAL
STRATUS PUSHING INTO PORTIONS OF THE VALLEYS LATE TONIGHT INTO
MONDAY MORNING AND FARTHER INTO THE VALLEYS FOR MONDAY NIGHT INTO
TUESDAY MORNING. COASTAL LOW CLOUDS AND PATCHY FOG WILL EXTEND
INTO THE FAR INLAND VALLEYS FOR THE MIDDLE AND LATTER PARTS OF THE
WEEK...FOLLOWED BY A SLOW DECREASE IN MARINE LAYER DEPTH NEXT
WEEKEND.

STRONGER ONSHORE FLOW WILL BRING GUSTY WEST WINDS TO THE MOUNTAINS
AND DESERTS EACH LATE AFTERNOON THROUGH LATE EVENING.

&&

.AVIATION...
300945Z...COAST/VALLEYS...PATCHY STRATUS WITH BASES 700-1000 FT MSL
WITH TOPS TO 1200 FT MSL DEVELOPING WITHIN 5-10 MILES OF THE  SAN
DIEGO COUNTY COAST THIS MORNING. VIS 3-5 SM IN BR...LOCALLY BELOW 1
MI...POSSIBLE WHERE CLOUDS NEAR HIGHER COASTAL TERRAIN AND COASTAL
MESAS. LOW CONFIDENCE IN TIMING/OCCURRENCE OF ANY CIGS AT KSAN. LOW
CLOUDS AND VIS RESTRICTIONS CLEARING BY 15Z. AREAS OF STRATUS WITH
BASES 1000-1200 FT MSL FORMING AFTER 31/06Z AND SPREADING 15-20 SM
INLAND OVERNIGHT. OTHERWISE A FEW HIGH CLOUDS AND UNRESTRICTED VIS
THROUGH MON MORNING.

MOUNTAINS/DESERTS...AREAS OF SURFACE WINDS 15-25 KT WITH GUSTS 30-40
KT THROUGH  THE SAN GORGONIO PASS AND ALONG DESERT MTN
SLOPES/FOOTHILLS THIS AFTERNOON AND EVENING...WEAKENING OVERNIGHT.
OTHERWISE...A FEW HIGH CLOUDS AND UNRESTRICTED VIS WILL THROUGH MON
MORNING.

&&

.MARINE...
300 AM...SMALL CRAFT ADVISORY IS IN EFFECT THROUGH 2 AM MONDAY FOR
NORTHWEST WINDS GUSTING 20-25 KT OVER PORTIONS OF THE OUTER COASTAL
WATERS THIS AFTERNOON AND EVENING. WINDS WILL WEAKEN BY EARLY
MONDAY.

&&

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

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
PZ...SMALL CRAFT ADVISORY UNTIL 2 AM PDT MONDAY FOR WATERS FROM SAN
     MATEO POINT TO THE MEXICAN BORDER EXTENDING 30 TO 60 NM OUT
     INCLUDING SAN CLEMENTE ISLAND.

&&

$$

PUBLIC...17
AVIATION/MARINE...SS



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