Alert archive / California / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 1, NWS Los Angeles, CA
NWS Los Angeles, CA issued this severe thunderstorm warning at Jan 20, 2010, 5:37 AM PST for San Luis Obispo County, Santa Barbara County, California. It was in force for 83 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
- Jan 20, 2010, 5:37 AM PST (13:37 UTC)
- Expired
- Jan 20, 2010, 7:00 AM PST
- In force
- 83 min
- Issued by
- NWS Los Angeles, CA
- Area
- Storm-based polygon
Counties San Luis Obispo County, CA, Santa Barbara 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 Jan 20, 3:30 AM PST, 2 hours 7 minutes earlier.
Area forecast discussion, Jan 20, 3:30 AM PST, 2 hours 7 minutes before
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</html>Hazardous weather outlook, Jan 20, 12:06 AM PST, 5 hours 31 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA 1206 AM PST WED JAN 20 2010 CAZ034>041-044>046-051>054-059-087-088-547-548-210806- 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- 1206 AM PST WED JAN 20 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWESTERN CALIFORNIA. .DAY ONE... TODAY A POWERFUL PACIFIC STORM SYSTEM WILL MOVE THROUGH THE REGION TODAY AND TONIGHT...BRINGING STRONG THUNDERSTORMS...HEAVY RAIN AND SNOW...AND VERY GUSTY WINDS. GIVEN THE AMOUNT OF RAIN EXPECTED AND THE ANTICIPATED RAINFALL RATES...MUD AND DEBRIS WILL BE POSSIBLE IN AND AROUND RECENT BURN AREAS. NEAR THE COAST AND ACROSS THE COASTAL WATERS...A LARGE WESTERLY SWELL WILL COMBINE WITH LARGE WIND WAVES TO PRODUCE VERY DANGEROUS SEAS. NEAR THE COAST...HIGH SURF CONDITIONS WILL CONTINUE WITH THE POSSIBILITY OF COASTAL FLOODING. IF ANY THUNDERSTORM DEVELOP... WATERSPOUTS WILL BE POSSIBLE OVER THE ENTIRE COASTAL WATERS. * WINTER STORM WARNING.......SEE WWUS46 KLOX - WSWLOX FOR DETAILS * * HIGH WIND WARNING..........SEE WWUS76 KLOX - NPWLOX FOR DETAILS * * HIGH WIND WATCH............SEE WWUS76 KLOX - NPWLOX FOR DETAILS * * FLOOD WATCH................SEE WGUS66 KLOX - FFALOX FOR DETAILS * * WINTER WEATHER ADVISORY....SEE WWUS46 KLOX - WSWLOX 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... THURSDAY THROUGH TUESDAY A POWERFUL PACIFIC STORM SYSTEM WILL EXIT THE REGION ON THURSDAY. NUMEROUS SHOWERS BEHIND THE SYSTEM WILL CONTINUE TO PRODUCE ACCUMULATING SNOWFALL IN THE MOUNTAINS. NEAR THE COAST AND ACROSS THE COASTAL WATERS...A LARGE WESTERLY SWELL WILL CONTINUE THROUGH FRIDAY. NEAR THE COAST...HIGH SURF CONDITIONS WILL CONTINUE. * WINTER STORM WARNING.......SEE WWUS46 KLOX - WSWLOX FOR DETAILS * * HIGH SURF ADVISORY.........SEE WHUS46 KLOX - CFWLOX 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. THOMPSON
In the hours before
Special weather statement, Jan 20, 12:23 AM PST, 5 hours 14 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA 1223 AM PST WED JAN 20 2010 CAZ034>041-044>046-051>054-059-087-088-547-548-210300- 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- 1223 AM PST WED JAN 20 2010 ...VIGOROUS STORM SYSTEM TO AFFECT THE REGION TODAY AND TONIGHT WITH THE POTENTIAL FOR STRONG THUNDERSTORMS...DAMAGING WINDS...HEAVY RAINS AND MOUNTAIN SNOWS...COASTAL FLOODING...AND DANGEROUS SURF... ANOTHER POWERFUL STORM SYSTEM WILL IMPACT THE AREA TODAY AND TONIGHT. RAIN WILL SPREAD OVER THE AREA THIS MORNING AND BECOME HEAVY AT TIMES. THE HEAVIEST RAIN WILL FALL ACROSS THE REGION BETWEEN 10 AM AND 8 PM. PEAK RAINFALL RATES WILL RANGE FROM THREE-QUARTERS OF AN INCH TO ONE INCH PER HOUR...WITH LOCAL RATES UP TO 1.50 INCHES PER HOUR ACROSS SOUTH-FACING SLOPES AND NEAR THUNDERSTORMS. A FLASH FLOOD WATCH IS IN EFFECT FOR THE 2008 AND 2009 BURN AREAS FOR THE POTENTIAL FOR SIGNIFICANT FLASH FLOODING AND LIFE-THREATENING DEBRIS FLOWS. TOTAL RAINFALL ACCUMULATIONS TODAY AND TONIGHT WILL RANGE FROM ONE TO TWO INCHES OVER COASTAL AND VALLEY AREAS...WITH TWO TO FOUR INCHES IN THE FOOTHILLS AND MOUNTAINS BELOW THE SNOW LEVEL WHICH WILL BE AROUND 5000 FEET. LOCAL RAINFALL TOTALS OVER FIVE INCHES ARE POSSIBLE ALONG SOUTH FACING SLOPES. THE COMBINATION OF STRONG ATMOSPHERIC DYNAMICS AND INSTABILITY WILL BRING A HIGH POTENTIAL FOR STRONG THUNDERSTORMS TO DEVELOP TODAY AND TONIGHT. SOME OF THE THUNDERSTORMS MAY PRODUCE HAIL...WIND GUSTS IN EXCESS OF 60 MPH...AND TORRENTIAL DOWNPOURS. ATMOSPHERIC CONDITIONS WILL ALSO BE FAVORABLE FOR ISOLATED WATERSPOUTS...WHICH CAN ALWAYS COME ASHORE AS WEAK TORNADOES. VERY STRONG AND DAMAGING WINDS WILL LIKELY BE WIDESPREAD ACROSS THE AREA TODAY INTO THIS EVENING...WITH HIGH WIND WARNINGS POSTED FOR MUCH OF SOUTHWEST CALIFORNIA. NUMEROUS DOWNED TREES AND POWER LINES WILL BE POSSIBLE...ALONG WITH THE THREAT OF PROPERTY DAMAGE. EVEN SOME COASTAL AND VALLEY AREAS NOT PRONE TO STRONG WINDS MAY BE AFFECTED BY THESE STRONG AND DAMAGING WINDS. THERE IS THE POTENTIAL FOR SOME OF THE STRONGEST WINDS ASSOCIATED WITH A FRONTAL SYSTEM IN OVER A DECADE ACROSS MUCH OF SOUTHWEST CALIFORNIA. IN THE MOUNTAIN AREAS...VERY STRONG WINDS GUSTING TO 80 MPH WILL COMBINE WITH THE HEAVY SNOW TO PRODUCE NEAR BLIZZARD CONDITIONS AND LOCAL WHITE OUT CONDITIONS...MAINLY ABOVE 5000 FEET. PERIODS OF MODERATE TO HEAVY SNOW ARE EXPECTED TO CONTINUE THROUGH THURSDAY NIGHT...WITH A WINTER STORM WARNING IN EFFECT FOR THE MOUNTAINS OF LOS ANGELES AND VENTURA COUNTIES. DRIVING CONDITIONS IN THE MOUNTAINS WILL BE VERY TREACHEROUS TODAY THROUGH THURSDAY...AND TRAVEL IS HIGHLY DISCOURAGED. VERY HIGH SURF WILL CONTINUE TO POUND SOUTHWEST AND WEST FACING BEACHES AND HARBORS THROUGH FRIDAY. THE HIGH SURF COMBINED WITH THE VERY STRONG SOUTHERLY WINDS TODAY WILL BRING AN INCREASED THREAT OF SIGNIFICANT COASTAL FLOODING OF LOW LYING AREAS AS WELL AS POTENTIAL DAMAGE TO LOCAL PIERS. COASTAL FLOOD WARNINGS AND HIGH SURF ADVISORIES ARE IN EFFECT FOR BEACHES FROM SAN LUIS OBISPO TO LOS ANGELES COUNTIES. RESIDENTS OF SOUTHWESTERN CALIFORNIA ARE URGED TO STAY TUNED FOR THE LATEST INFORMATION ON THIS VIGOROUS AND POWERFUL WINTER STORM. LISTEN TO NOAA WEATHER RADIO OR YOUR FAVORITE MEDIA SOURCE...OR VISIT OUR WEBSITE AT WEATHER.GOV/LOSANGELES FOR THE LATEST UPDATES OF FORECASTS AND WARNINGS. HALL/GOMBERG/DB
Special weather statement, Jan 20, 3:41 AM PST, 1 hour 56 minutes before
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</html>Special weather statement, Jan 20, 4:57 AM PST, 40 minutes before
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</html>The office that day
Everything else NWS Los Angeles, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 19, 8:00 PM PST | Gale Watch | LOX | 6 hr | |
| Jan 19, 8:00 PM PST | Small Craft Advisory | LOX | 17 hr | |
| Jan 19, 8:59 PM PST | High Wind Warning | LOX | Los Angeles, Santa Barbara | 23 hr |
| Jan 19, 10:12 PM PST | Coastal Flood Warning | LOX | Los Angeles | 68 hr |
| Jan 19, 10:41 PM PST | Winter Storm Warning | LOX | 71 hr | |
| Jan 19, 11:45 PM PST | Special Marine Warning | LOX | 47 min | |
| Jan 20, 2:18 AM PST | Gale Warning | LOX | 11 hr | |
| Jan 20, 2:18 AM PST | Small Craft Advisory | LOX | 31 hr | |
| Jan 20, 2:18 AM PST | Storm Warning | LOX | 11 hr | |
| Jan 20, 3:41 AM PST | Special Weather Statement | LOX | Los Angeles | 49 min |
| Jan 20, 5:34 AM PST | Special Marine Warning | LOX | 41 min | |
| Jan 20, 5:58 AM PST | Areal Flood Advisory | LOX | San Luis Obispo, Santa Barbara | 9 hr |
| Jan 20, 6:39 AM PST | Special Marine Warning | LOX | 36 min | |
| Jan 20, 9:34 AM PST | Areal Flood Advisory | LOX | Los Angeles, Ventura | 9 hr |
| Jan 20, 10:17 AM PST | Special Marine Warning | LOX | 43 min | |
| Jan 20, 10:58 AM PST | Special Marine Warning | LOX | 47 min | |
| Jan 20, 11:51 AM PST | Special Marine Warning | LOX | 39 min | |
| Jan 20, 1:21 PM PST | Gale Warning | LOX | 99 min | |
| Jan 20, 2:19 PM PST | Special Marine Warning | LOX | 26 min | |
| Jan 20, 2:30 PM PST | Wind Advisory | LOX | Los Angeles | 6 hr |
| Jan 20, 2:45 PM PST | Special Weather Statement | LOX | Los Angeles | 30 min |
| Jan 20, 3:00 PM PST | Gale Watch | LOX | 6 hr | |
| Jan 20, 3:42 PM PST | Flash Flood Warning | LOX | Los Angeles | 3 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.