Alert archive / California / Flash Flood Watches in 2014

Flash Flood Watch 5, NWS Los Angeles, CA

December 10, 2014Los Angeles County, California

NWS Los Angeles, CA issued this flash flood watch at Dec 10, 2014, 2:11 PM PST for Los Angeles County, California. It took effect at Dec 12, 2014, 12:00 AM PST. It was in force for 22 hr.

The area

The counties it named.

The facts

Issued
Dec 10, 2014, 2:11 PM PST (22:11 UTC)
In effect from
Dec 12, 2014, 12:00 AM PST
Expired
Dec 12, 2014, 10:00 PM PST
In force
22 hr
Issued by
NWS Los Angeles, CA
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 22:16 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 watch 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 watch went out at Dec 10, 2:10 PM PST, 1 minute earlier.

Area forecast discussion, Dec 10, 2:10 PM PST, 1 minute before
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Hazardous weather outlook, Dec 10, 6:00 AM PST, 8 hours 11 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
600 AM PST WED DEC 10 2014

CAZ034>041-044>046-051>054-059-087-088-547-548-111400-
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 WED DEC 10 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWESTERN CALIFORNIA.

.DAY ONE... TODAY AND TONIGHT

A MODERATE WESTERLY SWELL WILL BRING AN INCREASED RISK FOR RIP
CURRENTS AND HIGH SURF. DENSE FOG WILL BRING HAZARDOUS DRIVING
CONDITIONS TO THE CENTRAL COAST...THE SANTA YNEZ VALLEY AND THE PASO
ROBLES AREA THROUGH MID MORNING.

* HIGH SURF ADVISORY.........SEE WHUS46 KLOX - CFWLOX FOR DETAILS *

* HIGH RIP CURRENT RISK......SEE FZUS56 KLOX - SRFLOX FOR DETAILS *

* DENSE FOG ADVISORY.........SEE WWUS76 KLOX - NPWLOX FOR DETAILS *

.DAYS TWO THROUGH SEVEN... THURSDAY THROUGH TUESDAY

A STRONG AND COLD STORM SYSTEM WILL BRING A COOL AND WET WEATHER
PATTERN TO THE AREA THURSDAY AND FRIDAY. HEAVY RAINFALL IS LIKELY
WITH THIS SYSTEM...WITH FLASH FLOODING POSSIBLE ESPECIALLY FOR THE
RECENT BURN AREAS. THERE WILL BE A SLIGHT CHANCE OF THUNDERSTORMS
ACROSS THE AREA THURSDAY NIGHT AND FRIDAY. WATERSPOUTS WILL BE
POSSIBLE UNDER ANY THUNDERSTORM THAT FORMS OVER THE WATER. STRONG
AND POTENTIALLY DAMAGING SOUTHERLY WINDS ARE EXPECTED...ESPECIALLY
FOR THE MOUNTAINS. HIGH SURF WILL CONTINUE...PEAKING ON FRIDAY.
STRONG RIP CURRENT AND SIGNIFICANT BEACH EROSION IS POSSIBLE WITH
THIS SURF EVENT.

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

* HIGH SURF ADVISORY.........SEE WHUS46 KLOX - CFWLOX FOR DETAILS *

* HIGH RIP CURRENT RISK......SEE FZUS56 KLOX - SRFLOX FOR DETAILS *

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

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

.SPOTTER INFORMATION STATEMENT...

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

ASR

In the hours before

Special weather statement, Dec 10, 8:32 AM PST, 5 hours 39 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Dec 10, 4:16 AM PSTDense Fog AdvisoryLOX5 hr
Dec 10, 12:04 PM PSTGale WatchLOX9 hr
Dec 10, 2:10 PM PSTWind AdvisoryLOXLos Angeles, Santa Barbara42 hr

Nearby

Flash Flood Watches in California, 2014Every flash flood watch in 2014

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.