Alert archive / California / Flash Flood Watches in 2012

Flash Flood Watch 5, NWS Los Angeles, CA

September 10, 2012

NWS Los Angeles, CA issued this flash flood watch at Sep 10, 2012, 3:23 AM PDT. It took effect at Sep 10, 2012, 12:00 PM PDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Sep 10, 2012, 3:23 AM PDT (10:23 UTC)
In effect from: Sep 10, 2012, 12:00 PM PDT
Expired: Sep 10, 2012, 7:26 PM PDT
In force: 7 hr
Issued by: NWS Los Angeles, CA
Flood severity: None

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 Sep 9, 7:30 PM PDT, 7 hours 53 minutes earlier.

Area forecast discussion, Sep 9, 7:30 PM PDT, 7 hours 53 minutes before

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Hazardous weather outlook, Sep 9, 10:30 AM PDT, 16 hours 53 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
1030 AM PDT SUN SEP 9 2012

CAZ034>041-044>046-051>054-059-087-088-547-548-101300-
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-
1030 AM PDT SUN SEP 9 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWESTERN CALIFORNIA.

.DAY ONE... TODAY AND TONIGHT

THERE IS A CHANCE OF THUNDERSTORMS IN THE ANTELOPE VALLEY
AND THE MOUNTAINS OF VENTURA COUNTY THIS AFTERNOON INTO TONIGHT...
WITH THUNDERSTORMS LIKELY IN THE MOUNTAINS OF LOS ANGELES COUNTY.
SOME THUNDERSTORMS THIS AFTERNOON AND EVENING MAY PRODUCE VERY HEAVY
RAINFALL AND FLASH FLOODING. A FLASH FLOOD WATCH IS IN EFFECT FOR
THESE AREAS.

LIGHTNING FROM ANY THUNDERSTORM MAY SPARK FIRES IN AREAS THAT DO NOT
RECEIVE MUCH RAINFALL.

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

.DAYS TWO THROUGH SEVEN... MONDAY THROUGH SATURDAY

THERE IS A CHANCE OF SHOWERS AND THUNDERSTORMS IN THE MOUNTAINS OF
LOS ANGELES AND VENTURA COUNTIES AND THE ANTELOPE VALLEY MONDAY
AFTERNOON AND EVENING.

BRIEFLY HEAVY DOWNPOURS AND GUSTY WINDS ARE POSSIBLE WITH ANY
THUNDERSTORM.

LIGHTNING FROM ANY THUNDERSTORM MAY SPARK FIRES IN AREAS THAT DO NOT
RECEIVE MUCH RAINFALL.

.SPOTTER INFORMATION STATEMENT...

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

DB/ASR/EB

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 9, 5:22 PM PDT	Flash Flood Warning	LOX	Los Angeles	3 hr
Sep 9, 6:40 PM PDT	Areal Flood Advisory	LOX		93 min
Sep 10, 2:15 PM PDT	Areal Flood Advisory	LOX		3 hr
Sep 10, 2:38 PM PDT	Flash Flood Warning	LOX	Ventura	3 hr
Sep 10, 3:40 PM PDT	Flash Flood Warning	LOX	Los Angeles	3 hr
Sep 10, 3:49 PM PDT	Severe Thunderstorm Warning	LOX	Los Angeles	26 min
Sep 10, 4:11 PM PDT	Severe Thunderstorm Warning	LOX	Los Angeles	64 min

Nearby

Flash Flood Watches in California, 2012 Every flash flood watch in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.