Alert archive / California / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 8, NWS Los Angeles, CA

February 27, 2010San Luis Obispo County, California

NWS Los Angeles, CA issued this severe thunderstorm warning at Feb 27, 2010, 8:47 AM PST for San Luis Obispo County, California. It was in force for 28 min. 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, 8:47 AM PST (16:47 UTC)
Expired
Feb 27, 2010, 9:15 AM PST
In force
28 min
Issued by
NWS Los Angeles, CA
Area
Storm-based polygon

County San Luis Obispo County, CA

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Feb 27, 3:55 AM PST, 4 hours 52 minutes earlier.

Area forecast discussion, Feb 27, 3:55 AM PST, 4 hours 52 minutes before
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Hazardous weather outlook, Feb 27, 6:00 AM PST, 2 hours 47 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
600 AM PST SAT FEB 27 2010

CAZ034>041-044>046-051>054-059-087-088-547-548-281400-
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 SAT FEB 27 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWESTERN CALIFORNIA.

.DAY ONE... TODAY

A COLD UPPER LOW WILL MOVE OVER THE AREA TODAY. IT WILL BRING
NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS. SNOW WILL FALL ABOVE
5000 FEET AND LOCALLY DOWN TO 4500 FEET UNDER HEAVIER SHOWERS.
RAINFALL UNDER THE HEAVIER SHOWERS OR THUNDERSTORMS WILL BE POWERFUL
ENOUGH TO CREATE DEBRIS FLOWS IN THE RECENT BURN AREAS. SNOW WILL
MAKE FOR TREACHEROUS CONDITIONS IN THE MOUNTAINS. HIGH SURF AND
STRONG RIP CURRENTS WILL CREATE HAZARDS IN THE SURF ZONE.

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

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

.DAYS TWO THROUGH SEVEN... SUNDAY THROUGH FRIDAY

THERE IS A CHANCE OF RAIN LATER TUESDAY AND WEDNESDAY.

.SPOTTER INFORMATION STATEMENT...

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

RORKE

In the hours before

Special weather statement, Feb 27, 3:29 AM PST, 5 hours 18 minutes before
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Special weather statement, Feb 27, 4:34 AM PST, 4 hours 13 minutes before
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Special weather statement, Feb 27, 6:15 AM PST, 2 hours 32 minutes before
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Special weather statement, Feb 27, 8:32 AM PST, 15 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
832 AM PST SAT FEB 27 2010

UPDATE

CAZ034-035-039>041-087-272016-
CATALINA ISLAND-LOS ANGELES COUNTY COAST INCLUDING DOWNTOWN LOS
ANGELES-SAN LUIS OBISPO COUNTY CENTRAL COAST-SANTA BARBARA COUNTY
CENTRAL COAST-SANTA BARBARA COUNTY SOUTH COAST-VENTURA COUNTY COAST-
832 AM PST SAT FEB 27 2010

...TSUNAMI ADVISORY REMAINS IN EFFECT FOR THE IMMEDIATE COAST OF
SOUTHERN AND CENTRAL CALIFORNIA...

THIS IS NOT A TSUNAMI WARNING OR TSUNAMI WATCH. REPEAT...THIS IS NOT
A TSUNAMI WARNING OR TSUNAMI WATCH.

HOWEVER...A MINOR TSUNAMI MAY BE RECORDED IN SOME AREAS OF THE COAST
WHICH COULD PRODUCE DANGEROUS CURRENTS AND SURGES IN HARBORS AND
BAYS. PEOPLE ARE ADVISED TO STAY AWAY FROM THE BEACHES AND MARINAS.
WAVE HEIGHTS AND CURRENTS ARE AMPLIFIED BY IRREGULAR SHORELINES AND
ARE DIFFICULT TO PREDICT. WAVE FLUCTUATIONS ARE EXPECTED TO BEGIN
WITHIN 30 MINUTES OF THE ESTIMATED ARRIVAL TIMES LISTED BELOW:

PORT SAN LUIS HARBOR...AT 1235 PM PST.
SANTA BARBARA HARBOR...AT 1231 PM PST.
SANTA MONICA HARBOR....AT 1225 PM PST.
SAN PEDRO HARBOR.......AT 1215 PM PST.

...NEW INFO...

THE TSUNAMI WARNING CENTER IN PALMER ALASKA HAS RECEIVED THE LATEST
NOAA DART BUOY INFORMATION TO HELP UPDATE WAVE HEIGHT INFORMATION.
LATEST MODEL DATA CONTINUES TO INDICATE POTENTIAL TSUNAMI WAVE
HEIGHTS TO RANGE FROM TWO FEET TO JUST BELOW THREE FEET ACROSS SOME
COASTAL AREAS. PEAK WAVE HEIGHTS WILL LIKELY OCCUR AROUND 2 HOURS
AFTER THE INITIAL WAVE ARRIVAL. THERE WILL BE MORE UPDATES AS MORE
DATA BECOMES AVAILABLE.

...END OF NEW INFO...

THESE MINOR WAVE FLUCTUATIONS COULD CONTINUE FOR SEVERAL HOURS. THE
INITIAL WAVE MAY NOT BE THE LARGEST. MARINERS IN WATER DEEPER THAN
600 FEET SHOULD NOT BE AFFECTED BY THE TSUNAMI.

THE TSUNAMI ADVISORY IS A RESULT OF AN EARTHQUAKE WITH A PRELIMINARY
MAGNITUDE OF 8.8 ON THE RICHTER SCALE THAT OCCURRED AT 1034 PM PST.
THE EARTHQUAKE LOCATION WAS NEAR OF CHILE.

TSUNAMI ADVISORIES MEAN THAT A TSUNAMI CAPABLE OF PRODUCING STRONG
CURRENTS OR WAVES DANGEROUS TO PERSONS IN OR NEAR THE WATER IS
IMMINENT OR EXPECTED. STAY TUNED TO YOUR LOCAL NEWS SOURCE AND NOAA
WEATHER RADIO FOR FURTHER DEVELOPMENTS. THIS PRODUCT WILL BE UPDATED
AS NEW INFORMATION BECOMES AVAILABLE.

ADDITIONAL INFORMATION CAN BE FOUND AT THE FOLLOWING WEBSITE...
HTTP://WCATWC.ARH.NOAA.GOV (ALL LOWER CASE LETTERS)

KAPLAN/ASR/JACKSON

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, 3:34 AM PSTFlash Flood WarningLOXLos 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, 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

Severe Thunderstorm Warnings in California, 2010Every severe thunderstorm 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.