Alert archive / California / Flash Flood Warnings in 2005
Flash Flood Warning 24, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Feb 21, 2005, 12:34 PM PST for 4 counties in California. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Feb 21, 2005, 12:34 PM PST (20:34 UTC)
- Expired
- Feb 21, 2005, 4:00 PM PST
- In force
- 3 hr
- Issued by
- NWS San Diego, CA
- Area
- Counties, with a storm outline in the text
Counties Orange County, CA, Riverside County, CA, San Bernardino County, CA, San Diego County, CA
The radar
The Santa Ana Mts radar (KSOX), 61 km from the middle of the area, began a volume at 20:35 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 8.6 hours before the alert went out and 94 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 2 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 645 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 243 m²/s²
- 0-3 km storm-relative helicity
- 275 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS56 KSGX 212037
FFWSGX
CAC059-065-071-073-220000-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
1234 PM PST MON FEB 21 2005
THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHWEST SAN BERNARDINO COUNTY IN SOUTHEAST CALIFORNIA
WESTERN RIVERSIDE COUNTY IN SOUTHEAST CALIFORNIA
ORANGE COUNTY IN SOUTHWEST CALIFORNIA
SAN DIEGO COUNTY IN SOUTHWEST CALIFORNIA
* UNTIL 400 PM PST
* AT 1226 PM PST...SHOWERS...LOCALLY HEAVY CONTINUED TO MOVE NORTHWEST
ACROSS SOUTHWESTERN CALIFORNIA AT ABOUT 15 TO 20 MPH.
RESIDENTS AND MOTORISTS IN AND BELOW RECENTLY BURNED AREAS SHOULD BE
ALERT TO HEAVY MUD AND DEBRIS FLOWS WHICH MAY BLOCK ROADS AND
CULVERTS. POTENTIALLY DANGEROUS FLOODING AND PROPERTY LOSS COULD
RESULT IN AREAS WHERE RUNOFF IS RESTRICTED OR BLOCKED.
LAT...LON 3375 11805 3318 11739 3257 11723 3267 11630
3316 11660 3322 11649 3339 11661 3355 11645
3378 11662 3395 11701 3401 11670 3412 11664
3441 11681 3457 11757 3403 11770
$$
ATKINWhat 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 San Diego, CA wrote its last area forecast discussion before this flash flood warning went out at Feb 21, 9:45 AM PST, 2 hours 49 minutes earlier.
Area forecast discussion, Feb 21, 9:45 AM PST, 2 hours 49 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN DIEGO CA 945 AM PST MON FEB 21 2005 .SYNOPSIS...A STRONG WINTER STORM WILL CONTINUE TO BRING PERIODS OF RAIN AND MOUNTAIN SNOW THROUGH WEDNESDAY. THE PRECIPITATION WILL BE HEAVY AT TIMES WITH STRONG THUNDERSTORMS POSSIBLE AND FLOODING LIKELY. DRY WEATHER IS EXPECTED LATER THIS WEEK UNDER WEAK HIGH PRESSURE. && .DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES. AT 9 AM RADAR SHOWED 60-65DBZ CELLS OVER THE COASTAL WATERS MOVING NORTHEAST AT 25 KTS. THIS LINE OF STORMS WILL BRING MORE HEAVY RAIN AND FLOODING AS IT MOVES INLAND THROUGH THE MORNING. 12Z SOUNDING SHOWED A FAVORABLE SHEAR ENVIRONMENT FOR WATERSPOUTS OR BRIEF TORNADOES. STRONG THUNDERSTORM WINDS ALSO POSSIBLE ALONG AND AHEAD OF THE LINE OF CONVECTION AS IT MOVES INLAND. PWS WERE NEAR AN INCH. THE UPPER LEVEL LOW WEST OF SFO THIS MORNING WILL SLOWLY MOVE SOUTHEAST AND SETTLE OVER SOUTHERN CALIFORNIA WEDNESDAY AFTERNOON. ATMOSPHERE WILL REMAIN SATURATED THROUGH TUESDAY WITH EMBEDDED SHORTWAVES IN THE SOUTHWEST FLOW TRIGGERING PERIODS OF HEAVY SHOWERS AND THUNDERSTORMS. MINIMAL DRYING TAKES PLACE WEDNESDAY SO THE SHOWER ACTIVITY WONT BE AS WIDESPREAD...BUT MOST AREAS WILL CONTINUE TO SEE SCATTERED SHOWERS. SNOW LEVELS WERE NEAR 6200 HUNDRED FEET AT 17Z AND WILL SLOWLY LOWER THROUGH TO BETWEEN 5000 AND 5500 FEET WEDNESDAY AS COLD AIR SPREADS IN FROM THE WEST. HIGH WATER CONTENT AND SYNOPTIC SCALE LIFT COMBINED WITH STRONG OROGRAPHICS IN THE STRONG SOUTHWEST FLOW ALOFT WILL RESULT IN 1 TO 3 FEET OF SNOW ABOVE 7000 FEET. THE THREAT FOR SIGNIFICANT FLOODING AND MUDSLIDES WILL CONTINUE BELOW THE SNOW LEVEL. DRIER WEATHER THURSDAY AND FRIDAY WITH WEAK RIDGING OR ZONAL TYPE FLOW FOR THE END OF THE WEEK. && .SGX WATCHES/WARNINGS/ADVISORIES... SEVERE THUNDERSTORM WATCH UNTIL 3 PM...SEE LAXSPSSGX. FLOOD WATCH FOR FLASH FLOODING FOR ALL OF SOUTHWEST CALIFORNIA FROM UNTIL TUESDAY EVENING... SEE LAXFFASGX. WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM TUESDAY FOR THE SAN BERNARDINO AND RIVERSIDE COUNTY MOUNTAINS... SEE LAXWSWSGX. WINTER STORM WATCH IN EFFECT FROM TONIGHT TO WEDNESDAY MORNING FOR SAN DIEGO COUNTY MOUNTAINS... SEE LAXWSWSGX. HIGH RIP CURRENT RISK FOR ORANGE COUNTY AND SAN DIEGO COASTAL AREAS... SEE LAXSRFSGX. POTENTIAL FOR THUNDERSTORMS AND WATERSPOUTS IN THE COASTAL WATERS THROUGH TUESDAY NIGHT... SEE LAXMWSSGX. SMALL CRAFT ADVISORY IN EFFECT TODAY FOR COASTAL WATERS... SEE LAXCWFSGX. && MOEDE
Hazardous weather outlook, Feb 20, 6:48 PM PST, 17 hours 46 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATE NATIONAL WEATHER SERVICE SAN DIEGO CA 648 PM PST SUN FEB 20 2005 CAZ042-043-048-050-055-056-057-058-060-061-062-211400- ORANGE COUNTY COASTAL AREAS- SAN DIEGO COUNTY COASTAL AREAS- SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- SAN DIEGO COUNTY VALLEYS- SAN BERNARDINO COUNTY MOUNTAINS- RIVERSIDE COUNTY MOUNTAINS- SANTA ANA MOUNTAINS AND FOOTHILLS- SAN DIEGO COUNTY MOUNTAINS- APPLE AND LUCERNE VALLEYS- COACHELLA VALLEY- SAN DIEGO COUNTY DESERTS- 648 PM PST SUN FEB 20 2005 THIS HAZARDOUS WEATHER OUTLOOK IS FOR ALL OF EXTREME SOUTHWESTERN CALIFORNIA. .DAY ONE... TODAY THROUGH TONIGHT. A STRONG STORM WILL ARRIVE LATE TONIGHT AND BRING HEAVY RAIN... STRONG GUSTY WINDS...AND SNOW IN THE MOUNTAINS. LOCAL PONDING OF WATER AND ROCK AND MUD SLIDES ARE POSSIBLE IN STEEP TERRAIN. WINTER STORM WARNING IN EFFECT UNTIL 6 PM TUESDAY FOR THE SAN BERNARDINO AND RIVERSIDE COUNTY MOUNTAINS...AND A WINTER STORM WATCH IS IN EFFECT FOR THE SAN DIEGO COUNTY MOUNTAINS MONDAY AFTERNOON THROUGH WEDNESDAY MORNING...SEE LAXWSWSGX. A WIND ADVISORY IS IN EFFECT UNTIL 2 PM TUESDAY FOR THE ORANGE COUNTY AND SAN DIEGO COUNTY COAST...SAN DIEGO VALLEYS...AND THE INLAND EMPIRE. SOUTH WINDS WILL INCREASE TO 20 TO 30 MPH AFTER MIDNIGHT WITH GUSTS 40 TO 50 MPH...SEE LAXNPWSGX FLOOD ADVISORY FOR URBAN AND SMALL STREAM FLOODING IN EFFECT UNTIL 600 AM FOR SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS... INCLUDING THE INLAND EMPIRE...THE SAN BERNARDINO COUNTY MOUNTAINS AND THE SAN BERNARDINO COUNTY DESERTS...SEE LAXFLSSGX. FLOOD WATCH FOR FLASH FLOODING THROUGH TUESDAY EVENING...SEE LAXFFASGX. MARINE WEATHER STATEMENT FOR THE COASTAL WATERS...SEE LAXMWSSGX. GALE WARNING FOR THE COASTAL WATERS LATE TONIGHT...SEE LAXCWFSGX. LOCAL DENSE FOG IN THE MOUNTAINS WITH VISIBILITY BELOW ONE QUARTER MILE AT TIMES. .SPOTTER INFORMATION STATEMENT...SPOTTER ACTIVATION IS REQUESTED BY 10 PM. .DAYS TWO THROUGH SEVEN... MONDAY THROUGH SATURDAY. A STRONG STORM WILL ARRIVE EARLY MONDAY AND BRING HEAVY RAIN...STRONG GUSTY WINDS...AND SNOW IN THE MOUNTAINS. THIS STORM WILL CONTINUE THROUGH TUESDAY AND MOVE OUT OF THE REGION WEDNESDAY. LOCAL PONDING OF WATER AND ROCK AND MUD SLIDES ARE POSSIBLE IN STEEP TERRAIN. WINTER STORM WARNING IN EFFECT UNTIL 6 PM TUESDAY FOR THE SAN BERNARDINO AND RIVERSIDE COUNTY MOUNTAINS...AND A WINTER STORM WATCH IS IN EFFECT FOR THE SAN DIEGO COUNTY MOUNTAINS MONDAY THROUGH TUESDAY...SEE LAXWSWSGX. A WIND ADVISORY IS IN EFFECT UNTIL 2 PM TUESDAY FOR THE ORANGE COUNTY AND SAN DIEGO COUNTY COAST...SAN DIEGO VALLEYS...AND THE INLAND EMPIRE. ON MONDAY...SOUTH WINDS WILL BE 20 TO 30 MPH WITH GUSTS 40 TO 50 MPH...DECREASING MONDAY AFTERNOON TO 15 TO 25 MPH...SEE LAXNPWSGX FLOOD ADVISORY FOR URBAN AND SMALL STREAM FLOODING IN EFFECT UNTIL 600 AM FOR SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS... INCLUDING THE INLAND EMPIRE...THE SAN BERNARDINO COUNTY MOUNTAINS AND THE SAN BERNARDINO COUNTY DESERTS...SEE LAXFLSSGX. FLOOD WATCH FOR FLASH FLOODING UNTIL TUESDAY EVENING...SEE LAXFFASGX. MARINE WEATHER STATEMENT FOR THE COASTAL WATERS...SEE LAXMWSSGX. A GALE WARNING IS IN EFFECT FOR THE COASTAL WATERS MONDAY...SEE LAXCWFSGX. STRONG RIP CURRENTS MONDAY AND TUESDAY...SEE LAXSRFSGX. LOCAL DENSE FOG IN THE MOUNTAINS WITH VISIBILITY BELOW ONE QUARTER MILE AT TIMES THROUGH TUESDAY. .SPOTTER INFORMATION STATEMENT...SPOTTER ACTIVATION IS REQUESTED MONDAY. MM/SV/JAD
In the hours before
Special weather statement, Feb 21, 8:45 AM PST, 3 hours 49 minutes before
SPECIAL WEATHER STATEMENT 845 AM PST MON FEB 21 2005 CAZ042-043-048-050-055>058-212300- ORANGE COUNTY COASTAL AREAS- SAN DIEGO COUNTY COASTAL AREAS- SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- SAN DIEGO COUNTY VALLEYS- SAN BERNARDINO COUNTY MOUNTAINS- RIVERSIDE COUNTY MOUNTAINS- SANTA ANA MOUNTAINS AND FOOTHILLS- SAN DIEGO COUNTY MOUNTAINS- 845 AM PST MON FEB 21 2005 ...SEVERE WEATHER THREAT FOR MUCH OF SOUTHERN CALIFORNIA TODAY... A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 3 PM FOR SOUTHERN CALIFORNIA. THE WATCH COVERS SAN DIEGO AND ORANGE COUNTIES...WESTERN RIVERSIDE COUNTY...SOUTHWESTERN SAN BERNARDINO COUNTY...AND THE ADJACENT COASTAL WATERS. AN UNSTABLE AIR MASS WILL PRODUCE STRONG THUNDERSTORMS WITH VERY HEAVY RAIN...STRONG WINDS...DANGEROUS LIGHTNING AND HAIL. THE THREATS FOR SEVERE WEATHER INCLUDE THUNDERSTORM WIND GUSTS TO 70 MILES PER HOUR AND HAIL TO 1 INCH IN DIAMETER. CONDITIONS ARE ALSO FAVORABLE FOR WATERSPOUTS AND SMALL TORNADOS. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. MOEDE
Local storm report, Feb 21, 11:47 AM PST, 47 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN DIEGO CA
1147 AM PST MON FEB 21 2005
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0836 AM FLOOD FOUNTAIN VALLEY 33.71N 117.95W
02/21/2005 ORANGE CA TRAINED SPOTTER
URBAN FLOODING IN HUNTINGTON BEACH NEAR EDINGER AND
GOTHARD. SMALLER STREAMS AND DRAINAGE CHANNELS ARE
REACHING CAPACITY.
1035 AM FLOOD SAN DIEGO 32.72N 117.16W
02/21/2005 SAN DIEGO CA TRAINED SPOTTER
BRIEF HEAVY RAIN IN POINT LOMA. RIGHT LANES OF ROSECRANS
STREET FLOODED. UNDER ESTIMATED ONE FOOT OF WATER.
1046 AM FLOOD 5 ENE DANA POINT 33.48N 117.62W
02/21/2005 ORANGE CA LAW ENFORCEMENT
ROADWAY FLOODING IN SEVERAL AREAS ALONG HIGHWAY 74.
1046 AM FLOOD 5 E TEMECULA 33.50N 117.04W
02/21/2005 RIVERSIDE CA LAW ENFORCEMENT
RUSHING WATER OVER THE ROADWAY AT PECHANGA PKWY AND WOLF
VALLEY RD.
&&
PGThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 21, 6:45 AM PST | Flash Flood Warning | SGX | Orange | 2 hr |
| Feb 21, 7:03 AM PST | Special Marine Warning | SGX | 117 min | |
| Feb 21, 7:45 AM PST | Flash Flood Warning | SGX | Riverside, San Bernardino, San Diego | 2 hr |
| Feb 21, 7:57 AM PST | Tornado Warning | SGX | Orange | 33 min |
| Feb 21, 8:54 AM PST | Flash Flood Warning | SGX | Orange | 66 min |
| Feb 21, 9:06 AM PST | Special Marine Warning | SGX | 114 min | |
| Feb 21, 9:56 AM PST | Flash Flood Warning | SGX | Orange, Riverside, San Bernardino, San Diego | 3 hr |
Nearby
Flash Flood Warnings in California, 2005Every flash flood warning in 2005
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.