Flash Flood Warning 9, NWS San Diego, CA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
930 PM PST SUN JAN 6 2008

.SYNOPSIS...
SHOWERS AND ISOLATED THUNDERSTORMS SHOULD MOVE THROUGH THE REGION
OVERNIGHT WITH LOCALLY HEAVY RAIN AND GUSTY WINDS AT THE LOWER
ELEVATIONS. HEAVY SNOW IS EXPECTED ABOVE ABOUT 5000 FEET...WITH SOME
SNOW POSSIBLE AT TIMES DOWN TO AROUND 3500 FEET. STRONG GUSTY WINDS
ARE EXPECTED IN THE MOUNTAINS AND DESERTS. AFTER SOME DRYING AND
WARMING LATE MONDAY INTO TUESDAY ANOTHER SLIGHT CHANCE OF SHOWERS IS
POSSIBLE LATE TUESDAY NIGHT AND EARLY WEDNESDAY. HIGH PRESSURE IS
EXPECTED LATE IN THE WEEK FOR FAIR AND WARMER WEATHER...AND POSSIBLY
OFFSHORE FLOW BY NEXT WEEKEND.

&&

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

A STORM SYSTEM ROTATING AROUND THE BOTTOM OF THE MAIN LOW PRESSURE
SYSTEM TO THE NORTH WAS PRODUCING MAINLY MODERATE SHOWERS AROUND THE
REGION. WITH THE POSSIBILITY OF THE STORM LINGERING INTO THE
MORNING...THE FLASH FLOOD WATCH WAS EXTENDED.  ALTHOUGH NOT A
PERFECT SCENARIO...THE GUIDANCE POINTS TOWARD STRONG COASTAL
WINDS...WITH ISOLATED POCKETS OVER VERY STRONG WINDS UNDER ANY
STRONG CONVECTION THAT MAY DEVELOP OVERNIGHT. AS A RESULT THE WIND
ADVISORY WAS EXTENDED AND EXPANDED. AN UNOFFICIAL SNOW REPORT OF
ABOUT 2 FEET HAS BEEN RECEIVED FROM NEAR 6700 FEET.  SINCE THERE IS
STILL MORE ON THE WAY...THE HEAVY SNOW ADVISORY HAS BEEN EXTENDED AS
WELL.

ALTHOUGH THE SNOW LEVEL IS ABOUT 4000 FEET...IT COULD LOCALLY FALL
TO AROUND 3000 FEET FOR A WHILE...ESPECIALLY IN THE STRONGER
DOWNDRAFTS. WITH THE SNOW LEVEL PLUNGING TO WELL BELOW 6000 FEET
SOME OF THE HEAVIER CONVECTION WITH THE STORM COULD PRODUCE SMALL
HAIL. THERE IS A POSSIBILITY OF A BRIEF DAMAGING WIND GUST WITH SOME
OF THE STRONGER CELLS LATER TONIGHT.

THE STORM DEPARTS MONDAY AND DRY AIR MOVES IN AS HIGH PRESSURE
ARRIVES FOR A SHORT TIME.  ANOTHER WEAK STORM SYSTEM IS EXPECTED TUE
NIGHT AND WED MORNING. A SLIGHT CHANCE OF RAIN IS EXPECTED. THERE IS
A WARMING AND DRYING TREND THURSDAY INTO THE WEEKEND FOR POSSIBLE
OFFSHORE FLOW BY THEN.

&&

.AVIATION...
070248Z...TIGHTLY WOUND SURFACE LOW WILL BE TRAVERSING THE AREA
BETWEEN 08Z AND 15Z. EXPECT CIGS TO LOWER TO IFR AND OCCASIONALLY
LIFR ALL AREAS AT TIMES IN MODERATE TO HEAVY RAIN. ISOLATED
THUNDERSTORMS WILL BE POSSIBLE AS WELL. SURFACE WINDS WILL
INCREASE...WITH GUSTS TO 35 KNOTS POSSIBLE. WINDS COULD BE STRONGER
WITH GUSTS OVER 50 KT OVER THE HIGHER TERRAIN...RESULTING IN STRONG
UP AND DOWNDRAFTS THROUGH 18Z MON. AFTER 18Z CIGS WILL LIFT WEST OF
THE MOUNTAINS TO VFR WHILE THE COASTAL SLOPES REMAIN OBSCURED IN
CLOUDS AND LIGHT PRECIPITATION.

&&

.MARINE...
070248Z...A FAST-MOVING SURFACE LOW AND ASSOCIATED FRONTS WILL
MOVE THROUGH THE COASTAL WATERS OVERNIGHT AND EARLY MON. STRONG
SOUTH WINDS...BRIEFLY TO GALE FORCE...WILL BE POSSIBLE AT TIMES AS
THE LOW MOVES THROUGH WITH ASSOCIATED CONVECTION. ISOLATED
WATERSPOUTS AND THUNDERSTORMS WILL BE POSSIBLE AS WELL. A LARGE WEST
SWELL WILL COMBINE WITH STEEP WIND WAVES OF 4 TO 5 FT TO CREATE
COMBINED SEAS WELL OVER 10 FT AT TIMES THROUGH MON. CONDITIONS
SHOULD GRADUALLY IMPROVE MON BUT NORTHWEST WINDS OF 15 TO 25 KTS ARE
EXPECTED TO CONTINUE.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...DENSE FOG ADVISORY UNTIL 10 AM PST MONDAY FOR RIVERSIDE COUNTY
     MOUNTAINS-SAN BERNARDINO COUNTY MOUNTAINS-SAN DIEGO COUNTY
     MOUNTAINS-SANTA ANA MOUNTAINS AND FOOTHILLS.

     FLASH FLOOD WATCH THROUGH 8 AM MONDAY FOR ORANGE COUNTY
     COASTAL AREAS-RIVERSIDE COUNTY MOUNTAINS-SAN BERNARDINO
     COUNTY MOUNTAINS-SAN BERNARDINO AND RIVERSIDE COUNTY
     VALLEYS-THE INLAND EMPIRE-SAN DIEGO COUNTY
     COASTAL AREAS-SAN DIEGO COUNTY MOUNTAINS-SAN DIEGO COUNTY
     VALLEYS-SANTA ANA MOUNTAINS AND FOOTHILLS.

     WIND ADVISORY UNTIL 8 AM PST MONDAY FOR APPLE AND LUCERNE
     VALLEYS-COACHELLA VALLEY-RIVERSIDE COUNTY MOUNTAINS-SAN
     BERNARDINO COUNTY MOUNTAINS-SAN DIEGO COUNTY DESERTS-SAN
     DIEGO COUNTY MOUNTAINS.

     HEAVY SNOW WARNING UNTIL 8 AM PST MONDAY FOR RIVERSIDE COUNTY
     MOUNTAINS-SAN BERNARDINO COUNTY MOUNTAINS.

     HIGH SURF ADVISORY UNTIL 12 PM PST TUESDAY FOR ORANGE COUNTY
     COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...SMALL CRAFT ADVISORY FOR WINDS FROM 9 AM TO 8 PM PST MONDAY FOR
     WATERS FROM SAN MATEO POINT TO THE MEXICAN BORDER EXTENDING
     30 TO 60 NM OUT INCLUDING SAN CLEMENTE ISLAND.

     GALE WARNING FROM 10 PM THIS EVENING TO 9 AM PST MONDAY
     FOR COASTAL WATERS FROM SAN MATEO POINT TO THE MEXICAN
     BORDER AND OUT 30 NM-WATERS FROM SAN MATEO POINT TO THE
     MEXICAN BORDER EXTENDING 30 TO 60 NM OUT INCLUDING SAN
     CLEMENTE ISLAND.

&&

PUBLIC...SMALL
AVIATION/MARINE...JD

NWS ON THE WEB AT WEATHER.GOV/SANDIEGO

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN DIEGO CA
930 PM PST SUN JAN 6 2008

CAZ042-043-048-050-055>058-060>062-PZZ750-775-072200-
ORANGE COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS-
SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE-
SAN DIEGO COUNTY VALLEYS-SAN BERNARDINO COUNTY MOUNTAINS-
RIVERSIDE COUNTY MOUNTAINS-SANTA ANA MOUNTAINS AND FOOTHILLS-
SAN DIEGO COUNTY MOUNTAINS-APPLE AND LUCERNE VALLEYS-
COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS-
COASTAL WATERS FROM SAN MATEO POINT TO THE MEXICAN BORDER AND OUT
30 NM-
WATERS FROM SAN MATEO POINT TO THE MEXICAN BORDER EXTENDING 30 TO
60 NM OUT INCLUDING SAN CLEMENTE ISLAND-
930 PM PST SUN JAN 6 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST
CALIFORNIA.

.DAY ONE...REST OF TONIGHT

RAIN WILL CONTINUE AND COULD RESULT IN FLOODING OR MUDSLIDES IN THE
BURN AREAS. SNOW WILL FALL IN THE MOUNTAINS...MOSTLY ABOVE 4000
FEET...AND LOCAL AMOUNTS OF ONE TO TWO FEET ARE POSSIBLE THROUGH
MONDAY EVENING ABOVE 6000 FEET IN THE SAN BERNARDINO COUNTY
MOUNTAINS. GUSTY WINDS WILL OCCUR AS WELL AS DENSE FOG IN THE
MOUNTAINS.

A HIGH SURF ADVISORY IS IN EFFECT THROUGH NOON TUESDAY...SEE
LAXCFWSGX FOR DETAILS.

A FLASH FLOOD WATCH IS IN EFFECT THROUGH 8 AM MONDAY FOR ALL AREAS
EXCEPT THE DESERTS...SEE LAXFFASGX FOR DETAILS.

A HEAVY SNOW ADVISORY IS IN EFFECT ABOVE 5000 FEET IN THE SAN
BERNARDINO AND RIVERSIDE COUNTY MOUNTAINS...SEE LAXWSWSGX FOR
DETAILS.

A WIND ADVISORY IS IN EFFECT THROUGH 8 AM MONDAY...SEE LAXNPWSGX FOR
DETATILS.

A DENSE FOG ADVISORY IS IN EFFECT FOR THE MOUNTAINS...SEE LAXNPWSGX
FOR DETAILS.

SEE LAXFFASGX...LAXNPWSGX...LAXCFWSGX AND LAXCWFSGX FOR DETAILS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

SHOWERS WILL END MONDAY. AFTER 10 AM MONDAY...NO HAZARDOUS WEATHER
IS EXPECTED EXCEPT FOR HIGH SURF CONTINUING THROUGH TUESDAY MORNING.

.SPOTTER INFORMATION STATEMENT...SPOTTER ACTIVATION HAS BEEN
REQUESTED.

MAXWELL

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN DIEGO CA
951 PM PST SUN JAN 06 2008

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

0810 PM     FLOOD            ONTARIO                 34.05N 117.61W
01/06/2008                   SAN BERNARDINO     CA   TRAINED SPOTTER

            NORTHBOUND ON 4TH ST. BETWEEN VINEYARD AND HAVEN. NUMBER
            2 LANE FLOODED TO THE CURB AND WATER ACROSS ALL 4 LANES.

&&

SCV