Weather Service Report


235 
FXUS66 KSGX 262056
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
125 PM PDT SUN APR 26 2015

.SYNOPSIS...

UPPER LEVEL HIGH PRESSURE MOVING INTO CALIFORNIA FROM THE WEST ALONG 
WITH A SURFACE HIGH BUILDING OVER THE GREAT BASIN STATES OF NEVADA 
AND UTAH WILL BRING A DRYING NORTHEAST WIND AND A WARMING TREND 
MONDAY...AND CONTINUED WARM THROUGH TUESDAY. BY MIDWEEK THE NIGHT 
AND MORNING MARINE LAYER LOW CLOUDS AND FOG SHOULD RETURN...WITH 
COOLING EXPECTED MOST AREAS. 

&&

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

.SHORT TERM (TODAY THROUGH TUESDAY)...

LOTS OF FAIR WEATHER CUMULUS HAS DOTTED THE SOUTHERN CALIFORNIA 
COUNTRYSIDE FROM THE HIGHER MOUNTAINS WESTWARD AS THE AIRMASS 
HEATS...BUT WITH EVENING STABILIZATION THE CLOUDS SHOULD 
DISSIPATE...LEAVING MOSTLY CLEAR SKIES OVERNIGHT. 

A SHIFT IN THE PATTERN IS DEVELOPING OVER THE REGION. UPPER LEVEL 
HIGH PRESSURE SHOULD BUILD OVER THE REGION...AND ALLOW SOUTHERN 
CALIFORNIA TO HEAT UP A BIT. NORTHERLY FLOW WILL PUSH ANY REMAINING 
CLOUDS OUT OF THE AREA DURING THE EVENING FOR MAINLY CLEAR SKIES 
TONIGHT...AND WARMING CONDITIONS MONDAY INTO TUESDAY. THE LOCAL WRF 
AND BUFKIT DATA SHOW A STRONG DRYING TREND...WHICH LOOKS GOOD. THE 
WINDS SHOULD BE THE BIGGEST ISSUE...TARGETING THE PERIOD FROM LATE 
TONIGHT INTO MIDDAY MONDAY...THEN TAPER OFF DURING THE EARLY 
EVENING. 

&&

.LONG TERM (WEDNESDAY THROUGH SATURDAY)...

BY WEDNESDAY...ENSEMBLES BEGIN TO SHOW DIFFERENCES BETWEEN THE 
MEMBERS...AND POSSIBLY A TREND TOWARD A SLIGHTLY FASTER TROUGH. THIS 
SHOULD CAUSE HEIGHTS TO LOWER ON WEDNESDAY...AND THE ACCOMPANYING 
SURFACE PRESSURE FALLS OVER THE WEST SHOULD PULL IN THE ONSHORE FLOW 
AND SOME ASSOCIATED...MAINLY NIGHT AND MORNING COASTAL LOW CLOUDS 
AND FOG. IN A NUTSHELL...COOLING WILL SPREAD INLAND FROM THE COAST 
DURING THE LATTER HALF OF THE WEEK AND CONTINUE INTO THE WEEKEND. 

&&

.AVIATION... 262000Z...COAST/VALLEYS...SCT CLOUDS WITH BASES 3000-
4000 FT MSL THIS AFTERNOON...MAINLY ALONG THE COASTAL MOUNTAIN 
FOOTHILLS...SLOWLY DISSIPATING THROUGH THIS EVENING. OTHERWISE...VFR 
WITH UNRESTRICTED VIS THROUGH MONDAY. 

MTS/DESERTS...COASTAL SLOPES LOCALLY OBSCURED IN CLOUDS THROUGH 
15Z...OTHERWISE VFR WITH UNRESTRICTED VIS FOR THROUGH MONDAY 
AFTERNOON. NORTH TO NORTHEAST WINDS BECOMING STRONG AND GUSTY 
THROUGH AND BELOW PASSES AND CANYONS NEAR THE COASTAL FOOTHILLS 
TONIGHT THROUGH MONDAY MORNING...WITH LOCAL GUSTS OVER 50 KTS 
POSSIBLE. NORTHERLY GUSTS TO 35 KT ARE POSSIBLE VCTY KRAL AND KONT 
MONDAY MORNING.

&&

.MARINE...
 
100 PM PDT...NORTHWEST WINDS AND SEA HEIGHTS HAVE CONTINUED TO 
DIMINISH THIS AFTERNOON OVER THE COASTAL WATERS...THEREFORE THE 
SMALL CRAFT ADVISORY WILL BE CANCELED. WINDS AND SEAS WILL CONTINUE 
TO SUBSIDE THROUGH MON.

&&

.FIRE WEATHER... 

HIGH PRESSURE SURFACE AND ALOFT WILL BRING A WARMING TREND THROUGH 
TUESDAY. SURFACE OFFSHORE FLOW WILL BRING A PERIOD OF LOCALLY STRONG 
GUSTY NORTHEAST WINDS FROM BEFORE SUNRISE EARLY MONDAY MORNING UNTIL 
AROUND NOON ON MONDAY...ESPECIALLY BELOW THE CAJON PASS AND NEAR THE 
COASTAL FOOTHILLS. THE WINDS COMBINED WITH DECREASING HUMIDITIES 
COULD BRING A FEW HOURS OF NEAR CRITICAL FIRE WEATHER CONDITIONS 
MONDAY MORNING.

&&

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

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...WIND ADVISORY FROM 4 AM TO NOON PDT MONDAY FOR ORANGE COUNTY 
     INLAND AREAS-SAN BERNARDINO COUNTY MOUNTAINS-SAN BERNARDINO 
     AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE-SANTA ANA 
     MOUNTAINS AND FOOTHILLS.

&&

$$

PUBLIC/FIRE WEATHER...SMALL
AVIATION/MARINE...23

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