Strong offshore flow on Christmas Day caused sporadic power outages, uprooted trees, and overturned semi-tractor trailer rigs. The strongest winds were confined to areas below the Cajon Pass in the Inland Empire and in the Santa Ana Mountains and Foothills.
Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS SGX wrote it up.
Strong offshore flow on Christmas Day caused sporadic power outages, uprooted trees, and overturned semi-tractor trailer rigs. The strongest winds were confined to areas below the Cajon Pass in the Inland Empire and in the Santa Ana Mountains and Foothills.
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 25, 3:30 AM PST, 0 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN DIEGO CA 330 AM PST TUE DEC 25 2007 .SYNOPSIS...OFFSHORE FLOW WILL CAUSE LOCAL STRONG GUSTY WINDS LATE TODAY. HIGH WIND WARNINGS...WIND ADVISORIES AND FIRE WEATHER WARNINGS ARE IN EFFECT FOR THE MOUNTAINS...INLAND VALLEYS AND ORANGE COUNTY. THERE WILL ALSO BE LOCAL GUSTY NORTHWEST WINDS IN THE MOUNTAINS AND DESERTS WEDNESDAY AFTERNOON AND EVENING AS UPPER LEVEL LOW PRESSURE MOVES PAST TO THE NORTH. OTHERWISE... FAIR THROUGH MID WEEK. LOW PRESSURE ALOFT AND ONSHORE FLOW WILL BRING MORE CLOUDS AND COOLING FRIDAY WITH A SMALL CHANCE OF SHOWERS. && .DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES. TODAY...BRIEF STRONG SANTA ANA WILL CONTINUE THROUGH THE DAY DUE TO 15 MB OFFSHORE GRADIENT FROM A 1037 MB HIGH OVER NEVADA. GOOD UPPER AIR SUPPORT WITH 700 MB N GUSTS TO 50 MPH. LOCAL GUSTS TO 50 MPH HAVE ALREADY BEEN OBSERVED IN THE INLAND EMPIRE THIS EARLY MORNING. WINDS WILL FALL OFF RAPIDLY THIS EVENING AS HIGH PRESSURE SHIFTS EAST. WEDNESDAY...STRONG 564 NW FLOW ALOFT AND 10 MB ONSHORE FLOW WILL CAUSE GUSTY W-NW WINDS. 700 MB WINDS TO 50 MPH. MIGHT NEED WIND ADVISORY FOR MTS/DES WED NIGHT. THURSDAY...567 NW FLOW ALOFT WITH 1030 MB HIGH OVER NEVADA CAUSES WEAK...COLD OFFSHORE FLOW. MIGHT NEED FROST ADVISORY FOR SOME VALLEYS THURSDAY MORNING...AND AGAIN FOR THURSDAY NIGHT. FRIDAY THROUGH MONDAY...570 CYCLONIC NW FLOW INCREASES ONSHORE FLOW AND DEEPENS MARINE LAYER. COOL AND PARTLY CLOUDY. 7000 FT DEEP MARINE LAYER MAY CAUSE DRIZZLE AT TIMES. MODELS HAVE CHANGED AND NOW SHOW A STRONG 570 W-NW FLOW ALOFT AND STRONG ONSHORE FLOW FOR DEEP MARINE LAYER CONTINUING INTO MONDAY. THE MODELS HAVE DELAYED THE ONSET OF THE SANTA ANA EVENT BY ONE DAY. TUE-THU NEXT WEEK...VERY STRONG SANTA ANA WIND EVENT STILL INDICATED BY ALL MODELS. UNUSUALLY STRONG...COLD 1050 MB HIGH OVER THE PLATEAU COULD CAUSE OVER 20 MB OFFSHORE FLOW AND POTENTIAL OF HIGH WIND AND EXTREME FIRE DANGER. MODELS HAVE CHANGED WITH MORE OF A CUTBACK TROUGH PATTERN OVER AZ INTO BAJA. THAT WOULD BRING STRONGER UPPER AIR SUPPORT WITH 55 KT NE WINDS AT 700 MB BY WED MORNING. THIS PATTERN ALSO IMPLIES A COOLER EVENT THAN PREVIOUS RUNS. DEVELOPING PATTERN WILL BE MONITORED CLOSELY. && .AVIATION... 250900Z...CLEAR THROUGH WEDNESDAY WITH THIN HIGH CLOUDS AT TIMES. MODERATE TO STRONG OFFSHORE FLOW DEVELOPING THIS MORNING WITH LOCALLY STRONG GUSTY NORTH TO NORTHEAST WINDS OVER THE MOUNTAINS AND INLAND VALLEYS TO THE ORANGE COUNTY COAST AND SOME BREEZY NORTHEAST WINDS TO THE NORTHERN SAN DIEGO COAST. STRONG TURBULENCE ALOFT TODAY...DECREASING AFTERNOON. THE OFFSHORE FLOW FALLS APART RAPIDLY LATE THIS MORNING THROUGH AFTERNOON GOING ONSHORE WEDNESDAY. WEST TO NORTHWEST WINDS WILL INCREASE WEDNESDAY MORNING THROUGH AFTERNOON. .MARINE... 250900Z...WINDS WILL INCREASE WEDNESDAY WITH SMALL CRAFT ADVISORY WINDS IN THE OUTER WATERS LATE WEDNESDAY AFTERNOON THROUGH THE NIGHT...DECREASING EARLY THURSDAY MORNING. STEEP NORTHWEST SWELLS WILL MAINLY AFFECT THE OUTER WATERS FOR THE NEXT SEVERAL DAYS AT TIMES. && .SGX WATCHES/WARNINGS/ADVISORIES... RED FLAG WARNING UNTIL 6 PM FOR THE MOUNTAINS...INLAND VALLEYS AND ORANGE COUNTY. SEE LAXRFWSGX. HIGH WIND WARNING UNTIL 8 PM FOR THE INLAND EMPIRE...SAN BERNARDINO COUNTY MOUNTAINS AND SANTA ANA MOUNTAINS. SEE LAXNPWSGX. WIND ADVISORY UNTIL 8 PM FOR ORANGE COUNTY... RIVERSIDE COUNTY MOUNTAINS AND FOR THE MOUNTAIN AND INLAND VALLEYS OF SAN DIEGO COUNTY. SEE LAXNPWSGX. MINOR TIDAL OVERFLOW POSSIBLE AT THE BEACHES THIS MORNING. SEE LAXCFWSGX. SMALL CRAFT ADVISORY WEDNESDAY AND THURSDAY. SEE LAXCWFSGX. && PUBLIC/FIRE WEATHER...MACKECHNIE AVIATION/MARINE...WHITLOW
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN DIEGO CA 100 PM PST MON DEC 24 2007 CAZ042-043-048-050-055-056-057-058-060-061-062-251200- 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- 100 PM PST MON DEC 24 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EXTREME SOUTHWESTERN CALIFORNIA. .DAY ONE... REMAINDER OF TODAY THROUGH TONIGHT. OFFSHORE FLOW WILL CAUSE DRY AND LOCALLY STRONG GUSTY WINDS TONIGHT THROUGH TUESDAY. RED FLAG WARNING LATE TONIGHT FOR THE MOUNTAINS...INLAND VALLEYS AND ORANGE COUNTY. SEE LAXRFWSGX. HIGH WIND WARNING FOR THE SAN BERNARDINO COUNTY MOUNTAINS...INLAND EMPIRE AND SANTA ANA MOUNTAINS TONIGHT. SEE LAXNPWSGX. WIND ADVISORY FOR ORANGE COUNTY...THE RIVERSIDE COUNTY MOUNTAINS AND FOR THE SAN DIEGO COUNTY MOUNTAINS AND INLAND VALLEYS TONIGHT. SEE LAXNPWSGX. .DAYS TWO THROUGH SEVEN... TUESDAY THROUGH SUNDAY. RED FLAG WARNING UNTIL 6 PM TUESDAY FOR THE MOUNTAINS...INLAND VALLEYS AND ORANGE COUNTY. SEE LAXRFWSGX. HIGH WIND WARNING FOR THE SAN BERNARDINO COUNTY MOUNTAINS...INLAND EMPIRE AND SANTA ANA MOUNTAINS UNTIL 8 PM TUESDAY. SEE LAXNPWSGX. WIND ADVISORY FOR ORANGE COUNTY...THE RIVERSIDE COUNTY MOUNTAINS AND FOR THE SAN DIEGO COUNTY MOUNTAINS AND INLAND VALLEYS UNTIL 8 PM TUESDAY. SEE LAXNPWSGX. COASTAL FLOOD ADVISORY FOR THE BEACHES TUESDAY MORNING. SEE LAXCFWSGX. .SPOTTER INFORMATION STATEMENT...SKYWARN WEATHER ACTIVATION IS NOT REQUESTED FOR THIS AREA...HOWEVER WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS. MACKECHNIE/DA
The national radar mosaic for the moment the first event began.
2 high wind. Local standard time, as filed.
Wind gusts in excess of 58 mph were measured by the Fremont Canyon RAWS for nine consecutive hours. A peak wind gust of 85 mph occurred at 1030 PST.
A 58 mph wind gust was measured at Ontario Airport. Gusty winds in the Inland Empire downed power lines, uprooted trees, and overturned high profile vehicles.
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: 70168, 70169.