Alert archive / California / Flash Flood Warnings in 2004
Flash Flood Warning 11, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Feb 18, 2004, 8:45 PM PST for Riverside County, San Diego County, California. It was in force for 206 days. 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 18, 2004, 8:45 PM PST (04:45 UTC)
- Expired
- Sep 11, 2004, 5:00 PM PDT
- In force
- 206 days
- Issued by
- NWS San Diego, CA
- Area
- Counties, with a storm outline in the text
Counties Riverside County, CA, San Diego County, CA
The radar
The San Diego radar (KNKX), 100 km from the middle of the area, began a volume at 04:48 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 00:00Z, 4.8 hours before the alert went out and 119 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1160 m above ground
- 0-6 km bulk shear
- 84 kt
- 0-1 km storm-relative helicity
- 101 m²/s²
- 0-3 km storm-relative helicity
- 153 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 190445 FFWSGX CAC073-190545- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN DIEGO CA 845 PM PST WED FEB 18 2004 THE NATIONAL WEATHER SERVICE HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL SAN DIEGO COUNTY IN SOUTHWEST CALIFORNIA * UNTIL 945 PM PST * AT 838 PM PST...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM RAMONA TO 6 MILES SOUTHEAST OF CUYAMACA PEAK...OR FROM 5 MILES EAST OF POWAY TO 23 MILES EAST OF LAKESIDE...MOVING EAST AT 20 MPH. RESIDENTS AND MOTORISTS IN AND BELOW RECENTLY BURNED CEDAR FIRE AREA 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. EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF CREEKS AND STREAMS...ROADS AND ROADSIDE CULVERTS. THE HEAVY RAINS COULD ALSO TRIGGER ROCK AND MUDSLIDES IN STEEP TERRAIN. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. IF YOUR VEHICLE STALLS, ABANDON IT IMMEDIATELY AND SEEK HIGHER GROUND. TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE. $$ LAT...LON 3303 11712 3287 11649 3288 11582 3304 11645
1 follow-up statement
000 WGUS56 KSGX 112230 FFWSGX CAC065-120000- /X.NEW.KSGX.FF.W.0011.040911T2228Z-040912T0000Z/ /X.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN DIEGO CA 328 PM PDT SAT SEP 11 2004 THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL RIVERSIDE COUNTY IN SOUTHEAST CALIFORNIA THIS INCLUDES THE CITIES OF...PALM SPRINGS...PALM DESERT * UNTIL 500 PM PDT * AT 320 PM PDT...A THUNDERSTORM CAPABLE OF PRODUCING FLASH FLOODING WAS 10 MILES SOUTH OF PALM SPRINGS IN PALM DESERT...MOVING NORTHEAST AT 5 MPH. THE HIGHEST RISK OF FLASH FLOODING WILL BE ALONG PALM CANYON FROM THE SOUTH END OF PALM SPRINGS TO THE SAN JACINTO MOUNTAIN CREST. * THE THUNDERSTORM PRODUCING FLASH FLOODING WILL BE... JUST SOUTHWEST OF RANCHO MIRAGE BY 415 PM PDT HIKERS IN PALM CANYON SHOULD CLIMB TO SAFETY AWAY FROM THE BOTTOM OF THE CANYON. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. MOVE TO HIGHER GROUND. LAT...LON 3367 11662 3359 11646 3375 11633 3384 11655 $$ MAXWELL
What 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 18, 2:00 PM PST, 6 hours 45 minutes earlier.
Area forecast discussion, Feb 18, 2:00 PM PST, 6 hours 45 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN DIEGO 200 PM PST WED FEB 18 2004 .SYNOPSIS...A STORM WILL MOVE OUT OF THE AREA TONIGHT WITH A SLIGHT CHANCE REMAINING IN SAN DIEGO COUNTY. LOCALLY MODERATE RAIN STILL POSSIBLE LATE THIS AFTERNOON THROUGH EVENING AS THE BACK EDGE OF THE FRONT MOVES THROUGH. GUSTY WINDS WILL MAINLY BE IN THE MOUNTAINS AND DESERTS WITH LOCALLY BREEZY CONDITIONS ELSEWHERE TONIGHT. HIGH PRESSURE ALOFT WILL MOVE OVER ON THURSDAY. A SERIES OF STORMS WILL MOVE THROUGH THE AREA EACH DAY FROM FRIDAY THROUGH TUESDAY. HIGH PRESSURE WILL MOVE OVER ON WEDNESDAY. && .DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES. STORM WEAKENING AS IT MOVES INTO THE AREA. FIRST PART OF FRONT NOT PRODUCING MUCH RAIN IN THE AREA. GOOD EAST WINDS WITH LARGE DEW POINT DEPRESSIONS KEEPING IT MOSTLY LIGHT. LARGE AREA OF SHOWERS BEHIND FIRST RAIN BAND COULD STILL GIVE SOME MODERATE RAIN. FIRST BAND OF RAIN THINNING AND RAIN WILL BE LESS THAN ANTICIPATED. WILL KEEP SLIGHT CHANCE FOR EARLY THU MORNING FOR POSSIBLE TRAINING OFF THE ISLANDS INTO SAN DIEGO COUNTY BUT THAT LOOKS RATHER SLIM NOW. WILL GO SCATTERED SHOWERS EARLY IN SOUTH PART THEN SLIGHT CHANCE... OTHERWISE SLIGHT CHANCE EARLY TONIGHT. RAIN AMOUNTS LOOK MORE LIKE A QUARTER INCH IN THE COAST TO INLAND AREAS TO ONE HALF INCH MOUNTAINS. RIDGE MOVES OVER THU. NEXT STORM EXPECTED FRIDAY AFTERNOON. STORMS EXPECTED EACH DAY DURING THE WEEKEND. STORMS FORECAST FOR MON AND TUE LOOK RATHER SIGNIFICANT ON CURRENT MODELS WITH A DEEP COLD TROUGH MOVING OVER THE STATE. GUSTY WINDS PICKING UP OVER THE MOUNTAINS AND DESERTS AND WIND ADVISORY LOOKS OKAY. WINDS WILL SWITCH TO NORTHWEST TONIGHT. LOOKS COOL AND WET FRI THROUGH TUE. HIGH PRESSURE MOVES OVER NEXT WED. WARMER THU THEN COOLER WITH NOT MUCH CHANGE THROUGH TUE...THEN WARMER WED. && .SGX WATCHES/WARNINGS/ADVISORIES... SPECIAL WEATHER STATEMENT...............LAXSPSSGX. HYDROLOGIC OUTLOOK (SPECIAL ISSUANCE)...LAXESFSGX. FLASH FLOOD WATCH.......................LAXFLSSGX. WIND ADVISORY...........................LAXNPWSGX. MARINE WEATHER STATEMENT................LAXMWSSGX. SMALL CRAFT ADVISORY....................LAXCWFSGX. && WHITLOW
Hazardous weather outlook, Feb 18, 6:00 AM PST, 14 hours 45 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN DIEGO CA 600 AM PST WED FEB 18 2004 CAZ042-043-048-050-055>058-060>062-191400- 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 YUCCA VALLEYS- COACHELLA VALLEY- SAN DIEGO COUNTY DESERTS- 600 AM PST WED FEB 18 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EXTREME SOUTHWESTERN CALIFORNIA. .DAY ONE... TODAY THROUGH TONIGHT FLASH FLOOD WATCH FOR BURN AREAS IN SAN BERNARDINO AND SAN DIEGO COUNTIES. REFER TO LAXFLSSGX WGUS86 KSGX FOR DETAILS. ASTRONOMICAL HIGH TIDES COULD BRING MINOR TIDAL OVERFLOW AT THE BEACHES. REFER TO LAXMWSSGX FZUS76 KSGX FOR DETAILS. WIND ADVISORY FOR THE MOUNTAINS AND DESERTS. REFER TO LAXNPWSGX WWUS76 KSGX FOR DETAILS. .DAYS TWO THROUGH SEVEN... THURSDAY THROUGH TUESDAY SUNDAY AND SUNDAY NIGHT...A STORM WITH MODERATE TO HEAVY PRECIPITATION IS POSSIBLE. MONDAY NIGHT AND TUESDAY...A STORM WITH MODERATE TO HEAVY PRECIPITATION IS POSSIBLE. .SPOTTER INFORMATION STATEMENT... SKYWARN ACTIVATION THIS AFTERNOON AND EVENING. XXX666 NNNN
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 18, 4:20 PM PST | Flash Flood Warning | SGX | Riverside, San Diego | 205 days |
| Feb 18, 4:40 PM PST | Flash Flood Warning | SGX | San Bernardino | 206 days |
| Feb 18, 6:25 PM PST | Flash Flood Warning | SGX | San Bernardino, San Diego | 206 days |
Nearby
Flash Flood Warnings in California, 2004Every flash flood warning in 2004
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.