Alert archive / California / Flash Flood Warnings in 2010

Flash Flood Warning 15, NWS Los Angeles, CA

February 27, 2010Los Angeles County, California

NWS Los Angeles, CA issued this flash flood warning at Feb 27, 2010, 3:34 AM PST for Los Angeles County, California. It was in force for 6 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
Feb 27, 2010, 3:34 AM PST (11:34 UTC)
Expired
Feb 27, 2010, 9:30 AM PST
In force
6 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 11:35 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 Feb 27, 3:00 AM PST, 34 minutes earlier.

Area forecast discussion, Feb 27, 3:00 AM PST, 34 minutes before
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Hazardous weather outlook, Feb 26, 6:00 AM PST, 21 hours 34 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
600 AM PST FRI FEB 26 2010

CAZ034>041-044>046-051>054-059-087-088-547-548-271400-
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-
600 AM PST FRI FEB 26 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWESTERN CALIFORNIA.

.DAY ONE... TODAY

FLASH FLOOD WATCH FOR THE BURN AREAS WILL BEGIN LATER THIS EVENING
FOR SANTA BARBARA COUNTY...THEN AFTER MIDNIGHT FOR LOS ANGELES
COUNTY. EXPECT PERIODS OF HEAVY RAIN WITH HOURLY RAINFALL RATES
EXCEEDING USGS THRESHOLDS. THERE WILL BE THE POSSIBILITY OF HEAVY
SNOW AND GUSTY WINDS ACROSS THE LOS ANGELES AND VENTURA COUNTY
MOUNTAINS AS WELL LATER TONIGHT. THERE WILL ALSO BE THE POSSIBILITY
FOR GUSTY WINDS ACROSS THE SANTA BARBARA AND SAN LUIS OBISPO COUNTY
MOUNTAINS LATE THIS EVENING THROUGH EARLY SATURDAY MORNING WITH
GUSTS TO 60 MPH POSSIBLE. WITH THE UPCOMING STORM SYSTEM...THERE
WILL BE A CHANCE OF THUNDERSTORMS ACROSS THE REGIONS...INCLUDING THE
ADJACENT COASTAL WATERS ON SATURDAY. A FEW WEAK WATERSPOUTS COULD
DEVELOP AS WELL WITH THIS STORM SYSTEM ACROSS THE INNER
WATERS...ESPECIALLY FROM POINT MUGU TO HUNTINGTON BEACH AND THE SAN
PEDRO CHANNEL FROM EARLY SATURDAY.

* HIGH WIND WATCH............SEE WWUS76 KLOX - NPWLOX FOR DETAILS *

* FLOOD WATCH................SEE WGUS66 KLOX - FFALOX FOR DETAILS *

* WINTER STORM WATCH.........SEE WWUS46 KLOX - WSWLOX FOR DETAILS *

* MARINE WEATHER STATEMENT...SEE FZUS76 KLOX - MWSLOX FOR DETAILS *

* SPECIAL WEATHER STATEMENT..SEE WWUS86 KLOX - SPSLOX FOR DETAILS *

.DAYS TWO THROUGH SEVEN... SATURDAY THROUGH THURSDAY

FLASH FLOOD WATCH WILL CONTINUE TO BE IN EFFECT FOR THE BURN AREAS
SATURDAY MORNING THROUGH THE EVENING HOURS. EXPECT PERIODS OF HEAVY
RAIN WITH HOURLY RAINFALL RATES EXCEEDING USGS THRESHOLDS. THERE
WILL BE THE POSSIBILITY OF HEAVY SNOW AND GUSTY WINDS ACROSS THE LOS
ANGELES AND VENTURA COUNTY MOUNTAINS CONTINUING THROUGH SATURDAY
AFTERNOON AS WELL. CHANCE OF THUNDERSTORMS WILL CONTINUE ACROSS THE
REGION...INCLUDING THE ADJACENT COASTAL WATERS ON SATURDAY. A FEW
WEAK WATERSPOUTS COULD DEVELOP AS WELL WITH THIS STORM SYSTEM ACROSS
THE INNER WATERS...ESPECIALLY FROM POINT MUGU TO HUNTINGTON BEACH
AND THE SAN PEDRO CHANNEL FROM EARLY SATURDAY THROUGH THE EVENING
HOURS.

* FLOOD WATCH................SEE WGUS66 KLOX - FFALOX FOR DETAILS *

* WINTER STORM WATCH.........SEE WWUS46 KLOX - WSWLOX FOR DETAILS *

* MARINE WEATHER STATEMENT...SEE FZUS76 KLOX - MWSLOX FOR DETAILS *

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

KAPLAN

In the hours before

Special weather statement, Feb 27, 3:29 AM PST, 5 minutes before
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The office that day

Everything else NWS Los Angeles, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 26, 8:31 PM PSTAreal Flood AdvisoryLOXSan Luis Obispo35 min
Feb 26, 9:02 PM PSTAreal Flood AdvisoryLOXSan Luis Obispo4 hr
Feb 26, 9:31 PM PSTAreal Flood AdvisoryLOXSanta Barbara3 hr
Feb 26, 10:47 PM PSTFlash Flood WarningLOXSanta Barbara4 hr
Feb 26, 10:54 PM PSTAreal Flood AdvisoryLOXSanta Barbara6 hr
Feb 27, 1:16 AM PSTAreal Flood AdvisoryLOXVentura4 hr
Feb 27, 2:15 AM PSTAreal Flood AdvisoryLOXLos Angeles6 hr
Feb 27, 5:14 AM PSTAreal Flood AdvisoryLOXVentura80 min
Feb 27, 5:55 AM PSTAreal Flood AdvisoryLOXSan Luis Obispo, Santa Barbara5 hr
Feb 27, 7:27 AM PSTAreal Flood AdvisoryLOXVentura3 hr
Feb 27, 8:05 AM PSTAreal Flood AdvisoryLOXLos Angeles, Ventura10 hr
Feb 27, 8:47 AM PSTSevere Thunderstorm WarningLOXSan Luis Obispo28 min
Feb 27, 10:42 AM PSTAreal Flood AdvisoryLOXSan Luis Obispo, Santa Barbara6 hr
Feb 27, 11:49 AM PSTAreal Flood AdvisoryLOXVentura6 hr
Feb 27, 2:41 PM PSTFlash Flood WarningLOXLos Angeles3 hr
Feb 27, 3:12 PM PSTFlash Flood WarningLOXLos Angeles3 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.