AREA FORECAST DISCUSSION

 
 FXUS66 KSGX 100500
 AFDSGX
 
 AREA FORECAST DISCUSSION
 NATIONAL WEATHER SERVICE SAN DIEGO CA
 930 PM PST TUE FEB 9 2010
 
 .SYNOPSIS...COLD UPPER LEVEL LOW PRESSURE WILL CONTINUE SHOWERS AND 
 ISOLATED THUNDERSTORMS TONIGHT...DECREASING WEDNESDAY. SNOW LEVEL 
 NEAR 3000 FEET. FAIR WITH A WARMING TREND THURSDAY THROUGH EARLY 
 NEXT WEEK UNDER HIGH PRESSURE. 
 
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 .DISCUSSION...FOR SOUTHWEST CALIFORNIA INCLUDING SAN DIEGO... 
 ORANGE...SOUTHWEST SAN BERNARDINO AND WEST RIVERSIDE COUNTIES.
 
 .SHORT TERM (TONIGHT-FRIDAY)...AREAS OF SHOWERS AND ISOLATED 
 THUNDERSTORMS THIS EVENING. THE 00Z NKX SOUNDING WAS MOIST AND 
 MODERATELY UNSTABLE WITH INCREASING WSW WINDS ALOFT. ONSHORE 
 GRADIENTS WITH ABOUT 3 MB SAN-IPL. 
 
 THE COLD UPPER LOW CURRENTLY CENTERED NEAR PT CONCEPTION WILL MOVE S 
 OFF THE COAST TONIGHT AND THEN INLAND ACROSS NRN BAJA WEDNESDAY. 
 DYNAMICS AND COLD UNSTABLE AIR ASSOCIATED WITH THE LOW WILL CONTINUE 
 SHOWERS AND ISOLATED THUNDERSTORMS THROUGH THE NIGHT. THUNDERSTORMS 
 WILL PRODUCE SMALL HAIL AND THERE COULD BE WATERSPOUTS. WRAP AROUND 
 MOISTURE AND UPSLOPE SLOW WILL CONTINUE ISOLATED SHOWERS 
 WEDNESDAY...GENERALLY DECREASING IN COVERAGE AND INTENSITY. 
 ADDITIONAL RAINFALL TOTALS WILL BE QUITE VARIABLE DUE TO THE SHOWERY 
 NATURE OF THE PRECIP. GENERAL WIDESPREAD ADDITIONAL ACCUMULATIONS 
 SHOULD BE BETWEEN A QUARTER AND HALF AN INCH. SNOW LEVEL NEAR 
 3000 FT. LOCAL ADDITIONAL SNOW ACCUMULATIONS OF ABOUT 4 TO 8 INCHES. 
 SNOW WILL AFFECT THE MOUNTAIN PASSES AND THERE COULD BE LOCAL SNOW 
 AT THE HIGHER ELEVATIONS OF THE UPPER DESERTS. PATCHY FROST INLAND 
 THURSDAY MORNING. FAIR AND WARMER THURSDAY AND FRIDAY UNDER HIGH 
 PRESSURE. 
 
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 .LONG TERM (SATURDAY-TUESDAY)...STRONG HIGH PRESSURE ALOFT AND 
 INTERMITTENT WEAK OFFSHORE FLOW WILL CONTINUE FAIR AND WARMER 
 WEATHER. MAX TEMPS SHOULD GET ABOUT 5 TO 10 DEGREES ABOVE SEASONAL 
 AVERAGES BY EARLY NEXT WEEK. 
 
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 .AVIATION...
 100400Z...SCATTERED SHOWERS WILL CONTINUE THROUGH ABOUT 08Z WITH 
 VARIABLE CIGS FROM FL025 TO FL070. COASTAL SLOPES WILL BE OBSCURED 
 IN CLOUDS AND PCPN. GENERALLY VFR CONDITIONS TO FOLLOW THROUGH WED 
 MORNING WITH BKN-OVC CIGS BETWEEN FL035 AND FL050 AND ISOLATED LIGHT 
 SHOWERS...EXCEPT IN THE MOUNTAINS WHERE THE HIGHER TERRAIN WILL 
 REMAIN OBSCURED IN CLOUDS AND LIGHT SNOW. SOME MID-LEVEL 
 CLOUDS/MOISTURE WILL WRAP INTO THE AREA FROM THE EAST ON WED BUT ANY 
 PRECIPITATION SHOULD BE VERY LIGHT AND MOSTLY IN THE MOUNTAINS.
 
 .MARINE...
 COLD UPPER LOW MOVING OVER THE COASTAL WATERS THROUGH 15Z WED WILL 
 CONTINUE A CHANCE OF ISOLATED THUNDERSTORMS AND WATERSPOUTS. 
 OTHERWISE...SCATTERED SHOWERS ARE STILL LIKELY.
 
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 .SGX WATCHES/WARNINGS/ADVISORIES...
 
 WINTER WEATHER ADVISORY UNTIL 6 AM PST WEDNESDAY FOR THE MOUNTAINS 
 AND UPPER DESERTS. SEE LAXWSWSGX. 
 
 FLASH FLOOD WATCH THROUGH 6 AM PST WEDNESDAY FOR ORANGE COUNTY...THE 
 INLAND EMPIRE AND SANTA ANA MOUNTAIN FOOTHILLS. SEE LAXFFASGX.
 
 MARINE WEATHER STATEMENT THROUGH WEDNESDAY MORNING FOR THE COASTAL 
 WATERS. SEE LAXMWSSGX. 
 
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 $$
 
 PUBLIC...ATKIN  
 AVIATION/MARINE...JAD