Alert archive / California / Flash Flood Warnings in 2010
Flash Flood Warning 26, NWS Los Angeles, CA
NWS Los Angeles, CA issued this flash flood warning at Dec 20, 2010, 5:37 PM PST for Los Angeles County, California. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Dec 20, 2010, 5:37 PM PST (01:37 UTC)
- Expired
- Dec 20, 2010, 8:30 PM PST
- In force
- 3 hr
- Issued by
- NWS Los Angeles, CA
- Area
- Storm-based polygon
- Flood severity
- None
County Los Angeles County, CA
The radar
The Santa Ana Mts radar (KSOX), 71 km from the middle of the area, began a volume at 01:40 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Los Angeles, CA wrote its last area forecast discussion before this flash flood warning went out at Dec 20, 3:50 PM PST, 1 hour 47 minutes earlier.
Area forecast discussion, Dec 20, 3:50 PM PST, 1 hour 47 minutes before
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</html>Hazardous weather outlook, Dec 20, 2:55 PM PST, 2 hours 42 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA 255 PM PST MON DEC 20 2010 CAZ034>041-044>046-051>054-059-087-088-547-548-211400- SAN LUIS OBISPO COUNTY CENTRAL COAST- SANTA BARBARA COUNTY CENTRAL COAST-SANTA YNEZ VALLEY- SAN LUIS OBISPO COUNTY INTERIOR VALLEYS-CUYAMA VALLEY- SANTA BARBARA COUNTY SOUTH COAST-VENTURA COUNTY COAST- LOS ANGELES COUNTY COAST INCLUDING DOWNTOWN LOS ANGELES- VENTURA COUNTY INTERIOR VALLEYS-VENTURA COUNTY COASTAL VALLEYS- SANTA MONICA MOUNTAINS RECREATIONAL AREA- SAN LUIS OBISPO COUNTY MOUNTAINS- SANTA BARBARA COUNTY MOUNTAINS-VENTURA COUNTY MOUNTAINS- LOS ANGELES COUNTY MOUNTAINS EXCLUDING THE SANTA MONICA RANGE- ANTELOPE VALLEY-CATALINA ISLAND-SANTA CLARITA VALLEY- LOS ANGELES COUNTY SAN FERNANDO VALLEY- LOS ANGELES COUNTY SAN GABRIEL VALLEY- 255 PM PST MON DEC 20 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWESTERN CALIFORNIA. .DAY ONE... THROUGH TONIGHT PERIODS OF RAIN WILL CONTINUE ACROSS THE AREA THROUGH TONIGHT. THE HEAVY RAINFALL WILL PRODUCE LOCAL NUISANCE FLOODING OF LOW LYING AREAS SUCH AS UNDERPASSES. FOR THE RECENT BURN AREAS...THERE IS THE POTENTIAL FOR HIGH RAINFALL RATES WHICH COULD PRODUCE MUD AND DEBRIS FLOWS. LOWERED SNOW LEVELS HAVE BROUGHT LIGHT TO MODERATE SNOWFALL TO THE MOUNTAINS ABOVE 5000 FEET ELEVATION OF VENTURA AND SANTA BARBARA COUNTIES...AND WILL CONTINUE THROUGH AT LEAST TONIGHT WHILE SPREADING INTO THE LOS ANGELES COUNTY MOUNTAINS. BEACH GOERS WILL FACE AN ENHANCED RISK OF RIP CURRENTS. * FLASH FLOOD WATCH..........SEE WGUS66 KLOX - FFALOX FOR DETAILS * * WINTER WEATHER ADVISORY....SEE WWUS46 KLOX - WSWLOX FOR DETAILS * * HIGH RIP CURRENT RISK......SEE FZUS56 KLOX - SRFLOX FOR DETAILS * .DAYS TWO THROUGH SEVEN... TUESDAY THROUGH SUNDAY THE WET PATTERN IS EXPECTED TO CONTINUE ACROSS THE AREA THROUGH WEDNESDAY. THE ADDITIONAL RAINFALL WILL CONTINUE TO BRING DRIVING AND FLOODING ISSUES TO THE AREA. SNOW ACCUMULATIONS WILL INCREASE ABOVE 6000 FEET ELEVATION TUESDAY AND WEDNESDAY WITH SIGNIFICANT SNOWFALL EXPECTED TUESDAY NIGHT AND WEDNESDAY. STRONG SOUTHERLY WINDS WILL LIKELY IMPACT THE MOUNTAIN TUESDAY NIGHT...WITH DAMAGING GUSTS POSSIBLE. THERE WILL ALSO BE THE THREAT OF THUNDERSTORMS EVERYWHERE TUESDAY NIGHT AND WEDNESDAY. DRY CONDITIONS ARE EXPECTED ON THURSDAY AND FRIDAY. BY LATE CHRISTMAS DAY...ANOTHER BUT MUCH WEAKER STORM SYSTEM IS EXPECTED TO APPROACH SAN LUIS OBISPO COUNTY...BRINGING A POSSIBILITY OF RAIN TO ALL AREAS BY SUNDAY. * HIGH WIND WATCH............SEE WWUS76 KLOX - NPWLOX FOR DETAILS * * FLASH FLOOD WATCH..........SEE WGUS66 KLOX - FFALOX FOR DETAILS * * WINTER STORM WATCH.........SEE WWUS46 KLOX - WSWLOX FOR DETAILS * * WINTER WEATHER ADVISORY....SEE WWUS46 KLOX - WSWLOX FOR DETAILS * .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. SIRARD
The office that day
Everything else NWS Los Angeles, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 20, 4:30 PM PST | Small Craft Advisory | LOX | 4 hr | |
| Dec 20, 6:23 PM PST | Areal Flood Advisory | LOX | Los Angeles | 12 hr |
| Dec 21, 3:20 AM PST | Winter Storm Warning | LOX | 39 hr | |
| Dec 21, 3:27 AM PST | Gale Watch | LOX | 6 hr | |
| Dec 21, 3:27 AM PST | Gale Warning | LOX | 41 hr | |
| Dec 21, 3:27 AM PST | Small Craft Advisory | LOX | 11 hr | |
| Dec 21, 4:17 AM PST | High Wind Watch | LOX | 11 hr | |
| Dec 21, 4:17 AM PST | Wind Advisory | LOX | Los Angeles, Santa Barbara | 25 hr |
| Dec 21, 11:37 AM PST | Areal Flood Advisory | LOX | Los Angeles | 8 hr |
| Dec 21, 11:45 AM PST | Coastal Flood Statement | LOX | 21 hr | |
| Dec 21, 11:45 AM PST | High Surf Advisory | LOX | 21 hr |
Nearby
Flash Flood Warnings in California, 2010Every flash flood warning in 2010
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.