A winter storm brought snow to the mountains of Southern California. The heaviest snow fell in Pine Cove where a trained spotter reported 17 inches of total accumulation.
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The episode as NWS SGX wrote it up.
A winter storm brought snow to the mountains of Southern California. The heaviest snow fell in Pine Cove where a trained spotter reported 17 inches of total accumulation.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS San Diego, CA wrote its last area forecast discussion before the first event at Dec 8, 8:55 AM PST, 35 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN DIEGO CA 855 AM PST SAT DEC 8 2007 .SYNOPSIS...A MOIST UNSTABLE AIR MASS WILL CONTINUE SCATTERED SHOWERS TODAY. A COLD STORM WILL DROP SOUTH ALONG THE COAST TONIGHT AND SUNDAY MORNING BRINGING MORE RAIN AND POSSIBLE THUNDERSTORMS. THE RAIN COULD BE LOCALLY HEAVY LATE TONIGHT AND SUNDAY MORNING. IT WILL BE COLDER WITH LOW SNOW LEVELS BY EARLY SUNDAY. HIGH PRESSURE AND PERIODS OF OFFSHORE FLOW WILL BRING DRY AND WARMER WEATHER WITH LOCAL GUSTY WINDS THROUGH AND BELOW MOUNTAIN CANYONS AND PASSES DURING THE EARLY TO MIDDLE PART OF NEXT WEEK. && .DISCUSSION...FOR SOUTHWEST CALIFORNIA INCLUDING SAN DIEGO... ORANGE...SOUTHWEST SAN BERNARDINO AND WEST RIVERSIDE COUNTIES. SATELLITE IMAGERY AND RADAR SHOW NUMEROUS SHOWERS MOVING THROUGH SAN DIEGO COUNTY THIS MORNING BUT CLEARING ACROSS ORANGE COUNTY...THE INLAND EMPIRE...AND OFF THE COAST. THE 12Z SOUNDING FROM MIRAMAR SHOWED UNIDIRECTIONAL FLOW FROM THE SURFACE TO NEAR 13K FT AND A MODERATELY UNSTABLE PROFILE WITH NEAR 1/2 INCH OF PRECIPITABLE WATER. SNOW HAS BEEN FALLING IN THE MOUNTAINS ABOVE 3500 FT WITH SOME ONE AND TWO INCH ACCUMULATIONS REPORTED. WATER VAPOR IMAGERY SHOWS A TROUGH AXIS HAS JUST MOVED EAST OF THE AREA THIS MORNING. THIS SHOULD ALLOW SOME DRYING AND SOME SUN IN MOST AREAS AS IT PASSES TO THE EAST. THE MOUNTAINS AND FOOTHILLS WILL BE THE EXCEPTION AS MOIST UPSLOPE FLOW CONTINUES CLOUDS/FOG AND OCCASIONAL SHOWERS IN SOME AREAS. THE SNOW LEVEL SHOULD BE NEAR 4000 FEET WITH LITTLE ACCUMULATION EXPECTED AFTER THIS MORNING. CONDITIONS WILL BE FAVORABLE FOR ISLAND BANDING THROUGHOUT THE DAY SO AREAS DOWNWIND OF THE ISLANDS IN SAN DIEGO COUNTY WILL BE PARTICULARLY SUSCEPTIBLE TO CONTINUED SHOWER DEVELOPMENT. WATER VAPOR IMAGERY SHOWS THE NEXT SYSTEM OF CONCERN GATHERING STRENGTH OFF THE OREGON COAST THIS MORNING. IT APPEARS ON TRACK TO BRING US ANOTHER ROUND OF WEATHER BEGINNING TONIGHT AND CONTINUING INTO SUNDAY. BASED ON UNANIMOUS MODEL GUIDANCE...THERE IS HIGH CONFIDENCE IN THE STRENGTH AND TIMING OF THIS FEATURE AS IT MOVES SOUTH ALONG THE COAST AND THROUGH THE CA BIGHT. EXPECT TO SEE INCREASING UPSLOPE FLOW AHEAD OF THIS SYSTEM GENERATING RAIN AND SNOW IN THE MOUNTAINS THIS EVENING...THEN AS THE SYSTEM MOVES OVER OUR COASTAL WATERS...A SHIFT OF THE HEAVIER PRECIPITATION TO COASTAL AREAS OF MAINLY SAN DIEGO COUNTY...AND TO A LESSER EXTENT ORANGE COUNTY BY SUNDAY MORNING. THIS IS A COLD STORM WITH 500 MB TEMPERATURES NEAR -30 C...SO A FAIR AMOUNT OF INSTABILITY WILL DEVELOP AS LAPSE RATES STEEPEN TONIGHT AND SUNDAY OVER THE COASTAL WATERS. THUNDERSTORMS WITH LOCALLY HEAVY RAIN...ICE PELLETS AND ISOLATED FUNNEL CLOUDS AND WATER SPOUTS WILL BE POSSIBLE. THE COMBINATION OF CONVERGENCE WITH THE SURFACE LOW AND THE STEEP LAPSE RATES SHOULD BE ABLE TO GENERATE HEAVY RAINFALL RATES...ESPECIALLY COASTAL AREAS OF SAN DIEGO COUNTY. THIS TYPE OF SYSTEM ALWAYS HAS THE POTENTIAL TO SURPRISE ON THE UPSIDE SO WILL INCREASE QPF SLIGHTLY ABOVE THE WETTER MODEL GUIDANCE FOR SOUTHERN AREAS. WITH THAT IN MIND...WILL EXPECT WIDESPREAD ONE HALF...TO ONE INCH AMOUNTS FROM THE MOUNTAINS TO THE COAST THROUGH SUNDAY IN SAN DIEGO COUNTY. FARTHER NORTH...AMOUNTS WILL LIKELY BE LESS...WITH WIDESPREAD ONE-QUARTER TO ONE-HALF INCH AMOUNTS. LOCAL RAINFALL AMOUNTS COULD BE CONSIDERABLY HIGHER IN CONVECTION AND WHERE HEAVY SHOWERS ALIGN AND PERSIST. A SNOW ADVISORY MAY BE NECESSARY FOR THE SAN DIEGO MOUNTAINS SUNDAY WHERE UP TO SIX INCHES WILL BE POSSIBLE BY EVENING. WHILE SOME ACCUMULATION IS LIKELY...MOUNTAINS IN RIVERSIDE AND SAN BERNARDINO COUNTY SHOULD SEE LESS SNOW. DRYING SETS IN FOR NORTHERN AREAS SUNDAY AND SPREADS SOUTH THROUGHOUT THE DAY...EXCEPT FOR THE SAN DIEGO MOUNTAINS WHERE CLOUDS AND SOME LIGHT PRECIPITATION MAY LINGER. SKIES WILL REMAIN MOSTLY CLEAR THROUGH THE EXTENDED PERIOD WITH PERIODS OF OFFSHORE FLOW. RIDGING ALONG THE W COAST WILL BRING GRADUAL WARMING. && .AVIATION... 081630Z...A SHORT WAVE TROUGH RECENTLY PASSED OVER THE AREA THRU EARLY THIS MORNING. SHOWERS WERE LINGERING ACROSS SAN DIEGO COUNTY WITH LOCAL VISIBILITY 3-5SM AND WILL SLOWLY DECREASE THRU THIS AFTERNOON. CLOUD BASES MAINLY ABOVE 3000 FT MSL EXCEPT LOCAL BASES NEAR 2000 FT NEAR SHOWERS. TOPS OF SHOWERS AROUND 6-9K FT. MOUNTAINS WILL HAVE PLENTY OF OBSCURATIONS THIS MORNING PARTIALLY LIFTING THIS AFTN. SKIES HAD CLEARED OVER ORANGE COUNTY AND PORTIONS OF THE INLAND EMPIRE BUT EXPECT SCATTERED STRATOCU TO REDEVELOP IN THESE AREAS WITH THE DAYTIME HEATING. GUSTY WINDS OVER THE MOUNTAINS AND LOCALLY BREEZY ELSEWHERE TODAY. MORE SHOWERS WILL SPREAD BACK INTO THE REGION TONIGHT WITH LOWER CEILINGS 2000-3000 FT MSL AND LOCAL MVFR VSBY IN RAIN DEVELOPING APPROX 03-06Z. && .MARINE... SWELL INCREASING TODAY FOR INCREASING SURF HEIGHTS PARTICULARLY IN SAN DIEGO COUNTY. THE SWELL WILL DROP SUNDAY THROUGH MONDAY. HIGH SURF ADVISORY REMAINS FOR SAN DIEGO COUNTY BEACHES THROUGH SUNDAY EARLY AFTERNOON. GUSTY WEST WINDS THIS MORNING...WILL KEEP A SMALL CRAFT ADVISORY FOR THE COASTAL WATERS OFF SAN DIEGO COUNTY UNTIL 10 AM PST TODAY. NEXT SHORT WAVE TROUGH MOVING INTO THE AREA TONIGHT THROUGH EARLY SUNDAY WILL BRING NUMEROUS SHOWERS AND THE POSSIBILITY OF THUNDERSTORMS AND WATERSPOUTS OVER THE COASTAL WATERS. && .SGX WATCHES/WARNINGS/ADVISORIES... SPECIAL WEATHER STATEMENT. SEE LAXSPSSGX. HIGH SURF ADVISORY UNTIL 2 PM PST SUNDAY FOR SAN DIEGO COUNTY COASTAL AREAS. SEE LAXCFWSGX AND LAXSRFSGX. SMALL CRAFT ADVISORY. SEE LAXCWFSGX. && PUBLIC...JAD AVIATION/MARINE...LAVIS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN DIEGO CA 400 AM PST SAT DEC 8 2007 CAZ042-043-048-050-055-056-057-058-060-061-062-090000- 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- 400 AM PST SAT DEC 8 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR ALL OF EXTREME SOUTHWESTERN CALIFORNIA. .DAY ONE... TODAY AND TONIGHT. HIGH SURF ADVISORY REMAINS IN EFFECT FOR SAN DIEGO COUNTY COASTS. SEE LAXCFWSGX AND LAXSRFSGX FOR DETAILS. SHOWERS AND ISOLATED THUNDERSTORMS WITH PERIODS OF HEAVY SHOWERS POSSIBLE LATE TODAY AND TONIGHT WITH LOW SNOW LEVELS. POSSIBLE WATERSPOUTS AND FUNNEL CLOUDS. SEE LAXSPSSGX FOR DETAILS. SMALL CRAFT ADVISORY UNTIL 10 AM. SEE LAXCWFSGX FOR DETAILS. .DAYS TWO THROUGH SEVEN... SATURDAY THROUGH THURSDAY. HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 2 PM SUNDAY FOR SAN DIEGO COUNTY COASTS. SEE LAXCFWSGX AND LAXSRFSGX FOR DETAILS. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS WITH LOW SNOW LEVELS SUNDAY. POSSIBLE WATERSPOUTS AND FUNNEL CLOUDS SUNDAY. SEE LAXSPSSGX FOR DETAILS. .SPOTTER INFORMATION STATEMENT...SKYWARN WEATHER ACTIVATION IS NOT REQUESTED FOR THIS AREA AT THIS TIME.
The national radar mosaic for the moment the first event began.
1 heavy snow. Local standard time, as filed.
A trained spotter reported 13 inches of snow in less than 24 hours and a total storm accumulation of 17 inches.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2007Every state in 2007This day in weather historyWarnings in California, December 2007
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 70190.