Alert archive / California / Flash Flood Warnings in 2007
Flash Flood Warning 19, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Aug 26, 2007, 1:41 PM PDT for San Diego County, California. It was in force for 94 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Aug 26, 2007, 1:41 PM PDT (20:41 UTC)
- Expired
- Aug 26, 2007, 3:15 PM PDT
- In force
- 94 min
- Issued by
- NWS San Diego, CA
- Area
- Whole counties
County San Diego County, CA
The radar
The San Diego radar (KNKX), 28 km from the middle of the area, began a volume at 20:42 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 26, 1:45 PM PDT | FLASH FLOOD | 10 Ene Borrego Springs, CA | FLASH FLOODING IS BEING REPORTED BY CHP ON HIGHWAY S22 EAST OF BORREGO SPRINGS. PEOPLE ARE TRAPPED IN THE WASHES AND S22 HAS BEEN CLOSED. THE THUNDERSTORM THAT PRODUCED THE FLASH FLOODING IN THE ANZA BORREGO DESERT HAD A CLOUD TOP OF 60K FT. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 8.7 hours before the alert went out and 47 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
- 1025 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 19 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 262043 FFWSGX CAC073-262215- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN DIEGO CA 141 PM PDT SUN AUG 26 2007 THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHEASTERN SAN DIEGO COUNTY IN SOUTHWEST CALIFORNIA... * UNTIL 315 PM PDT * AT 136 PM PDT...VERY HEAVY RAINFALL CONTINUED FROM THUNDERSTORMS EXTENDED FROM 5 MILES SOUTHWEST OF OCOTILLO WELLS NORTH TO 5 MILES EAST OF BORREGO SPRINGS. THESE THUNDERSTORMS WILL PRODUCE FLASH FLOODING...ESPECIALLY SINCE THESE WERE SLOW MOVING THUNDERSTORMS...MOVING NORTHEAST AT ONLY 5 MPH. * HIGHWAY 78 JUST WEST OF OCOTILLO WELLS WILL ESPECIALLY BE AT RISK OF FLASH FLOODING BECAUSE IT IS IN A CANYON WHICH HAS HAD 2 TO 3 INCHES OF RAIN SINCE 1230 PM ACCORDING TO DOPPLER RADAR. 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. 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. LAT...LON 3298 11610 3287 11639 3338 11639 3342 11608 TIME...MOT...LOC 2041Z 210DEG 9KT 3313 11619 $$ MAXWELL
1 follow-up statement
000 WGUS76 KSGX 262123 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 219 PM PDT SUN AUG 26 2007 CAC073-262215- SAN DIEGO CA- 219 PM PDT SUN AUG 26 2007 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 PM PDT FOR NORTHEASTERN SAN DIEGO COUNTY... HEAVY RAINS CONTINUED FROM NEARLY STATIONARY THUNDERSTORMS EXTENDING FROM AGUA CALIENTE SPRINGS TO 5 MILES WEST OF OCOTILLO WELLS TO 10 MILES EAST OF BORREGO SPRINGS. LITTLE MOVEMENT IS EXPECTED WITH THESE STORMS...AND FLASH FLOODING IS EXPECTED TO CONTINUE THROUGH 315 PM. DOPPLER RADAR HAS INDICATED RAINFALL OF UP TO 3 INCHES WEST OF OCOTILLO WELLS AND EAST OF BORREGO SPRINGS. AROUND 200 PM PDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED PEOPLE TRAPPED IN WASHES THAT ARE BEGIN HIT BY FLASH FLOODING EAST OF BORREGO SPRINGS...INCLUDING THE PALM WASH SLOT CANYONS. ALSO...HIGHWAY S22 WAS CLOSED EAST OF BORREGO SPRINGS DUE TO FLOODING. NUMEROUS ROCK AND MUD SLIDES AND DEBRIS FLOWS WERE OCCURRING BOTH EAST OF BORREGO SPRINGS AND ALONG HIGHWAY 78 WEST OF OCOTILLO WELLS. LAT...LON 3298 11610 3287 11639 3338 11639 3342 11608 TIME...MOT...LOC 2119Z 210DEG 9KT 3321 11613 $$ 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 Aug 26, 9:00 AM PDT, 4 hours 41 minutes earlier.
Area forecast discussion, Aug 26, 9:00 AM PDT, 4 hours 41 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN DIEGO CA 900 AM PDT SUN AUG 26 2007 .SYNOPSIS... MONSOONAL MOISTURE WILL BRING SOME SHOWERS AND THUNDERSTORMS TODAY. OTHERWISE...PARTLY CLOUDY WEATHER WILL DOMINATE WITH PATCHY LOW CLOUDS AT THE COAST. RESIDUAL MID LEVEL MOISTURE IN SOUTH FLOW ALOFT COULD BRING SOME AFTERNOON CLOUDS TO THE MOUNTAINS AT TIMES FOR MONDAY THROUGH THE REST OF THE WEEK. BUILDING HIGH PRESSURE OVER ARIZONA WILL BRING TEMPERATURES A LITTLE ABOVE SEASONAL AVERAGES THE LATTER HALF OF THE WEEK. && .DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES... A HUGE THUNDERSTORM COMPLEX DEVELOPED OVER ESCONDIDO AND EXPANDED THIS MORNING TO COVER MUCH OF NORTH SAN DIEGO NORTH. OTHER CELLS WERE POPPING UP AROUND SAN DIEGO CO AND EVEN A POSSIBLY SEVERE STORM OVER THE OCEAN BETWEEN CATALINA AND OCEANSIDE. RAINS WERE HEAVY ENOUGH TO WARRANT A FLASH FLOOD WARNING IN THE NORTH COUNTY. IT APPEARS AN UPPER LOW SPINNING OFF THE COAST HAS PRODUCED AN AREA OF UPPER DIFFLUENCE RIGHT OVER NORTHERN SAN DIEGO COUNTY WHICH HAS ENHANCED THE RISING MOTION OVER THAT AREA. WELL...THINGS HAVE TURNED OUT JUST ABOUT OPPOSITE OF WHAT WE THOUGHT ABOUT THE WEATHER THIS WEEKEND AND WE ARE HAVING HUMBLE PIE FOR SUNDAY BRUNCH TODAY. COMPUTER MODELS HAVE A TOUGH TIME WITH TROPICAL WEATHER PATTERNS ANYWAY...BUT IN ADDITION VERY LITTLE DATA IS AVAILABLE FROM MEXICO (THE SOURCE REGION OF OUR WEATHER) TO BE USED AS INPUT TO THE MODELS. IN SHORT...THE MODELS HAVE PERFORMED VERY POORLY. FOR TODAY WE WILL PROBABLY THROW THE MODELS OUT THE WINDOW AND FORECAST WITH ONLY SATELLITE AND RADAR. WITH THIS UPPER LOW OFF THE COAST ACTING AS A SYNOPTIC TRIGGER FOR CONVECTION...THERE WILL BE SCATTERED SHOWERS AND TSTORMS EXTENDING THROUGH THE ENTIRE REGION TODAY. AS THE ATMOSPHERE DRIES OUT AND STABILIZES TONIGHT...THE THREAT FOR PRECIP WILL END. THE TREND FOR DRYING IS STILL THERE FOR MON AND TUE WITH GREATLY REDUCED POPS FOR MON AND LESS FOR TUE. THE COASTAL STRATUS WILL BE MINIMAL BUT PROBABLY NOT COMPLETELY ABSENT DURING THE NIGHTS AND EARLY MORNINGS THIS WEEK. HIGH PRESSURE OVER AZ WILL BUILD AND EXPAND WITH TEMPS RISING TO A LITTLE ABOVE SEASONAL AVERAGES. MINOR INTRUSIONS OF MID LEVEL MOISTURE FROM THE SOUTH COULD BRING SOME AFTERNOON CLOUDS TO THE MOUNTAINS AT TIMES EACH AFTERNOON THIS WEEK...BUT IS MARGINAL FOR TSTORM DEVELOPMENT. && .AVIATION... 261400Z...THE MAIN PROBLEM OF THE DAY WILL BE THUNDERSTORM ACTIVITY OVER THE AREA ESPECIALLY FROM THE MOUNTAINS WEST TO THE COASTAL WATERS. UPPER LEVEL LOW ABOUT 130 MILES TO THE SOUTHWEST OF SAN DIEGO WILL KEEP ISOLATED THUNDERSTORM ACTIVITY OVER THE AREA THROUGH THE AFTERNOON ANDN POSSIBLY INTO THE EVENING. BASES SHOULD BE AT OR ABOVE FL060 WITH TOPS TO FL450. 12Z NKX SOUNDING AND MDCRS SOUNDINGS INDICATE THE MARINE LAYER DEPTH WAS AROUND 1200 FEET. ONLY PATCHY STRATUS ALONG THE COAST THIS MORNING AND IS NOT EXPECTED TO POSE MUCH OF A PROBLEM AT THE AREA AIRPORTS. SOME STRATUS COULD RETURN TO THE IMMEDIATE COAST BY SUNSET AND SPREAD LOCALLY INLAND DURING THE EVENING. && .SGX WATCHES/WARNINGS/ADVISORIES... CA...ASSORTED SHORT FUSED WARNINGS AND ADVISORIES...SEE WEATHER.GOV/SANDIEGO FOR DETAILS. PZ...MARINE WEATHER STATEMENT TODAY...SEE LAXMWSSGX. && PUBLIC...MM AVIATION/MARINE...HORTON
Hazardous weather outlook, Aug 26, 5:00 AM PDT, 8 hours 41 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN DIEGO CA 500 AM PDT SUN AUG 26 200 CAZ055-056-058-270100- SAN BERNARDINO COUNTY MOUNTAINS-RIVERSIDE COUNTY MOUNTAINS- SAN DIEGO COUNTY MOUNTAINS- 500 AM PDT SUN AUG 26 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR MOUNTAINS OF EXTREME SOUTHWESTERN CALIFORNIA. .DAY ONE...TODAY AND TONIGHT MONSOONAL MOISTURE WILL BRING A CHANCE OF THUNDERSTORMS THIS AFTERNOON AND EVENING. THE FLASH FLOOD POTENTIAL IS MODERATE... THUNDERSTORMS ARE EXPECTED TO DEVELOP AND ISOLATED FLASH FLOODING IS POSSIBLE. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY NO WIDESPREAD HAZARDOUS WEATHER IS EXPECTED. .SPOTTER INFORMATION STATEMENT... SKYWARN ACTIVATION IS REQUESTED FOR THIS AFTERNOON THROUGH EARLY EVENING. WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS. CAZ048-050-060>062-270100- SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- SAN DIEGO COUNTY VALLEYS-APPLE AND LUCERNE VALLEYS- COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS- 500 AM PDT SUN AUG 26 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR DESERTS AND VALLEYS OF EXTREME SOUTHWESTERN CALIFORNIA. .DAY ONE...TODAY AND TONIGHT MONSOONAL MOISTURE WILL BRING A SLIGHT CHANCE OF THUNDERSTORMS THIS AFTERNOON AND EVENING. THE FLASH FLOOD POTENTIAL IS LOW...THE RISK OF FLASH FLOODING IS MINIMAL. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY NO WIDESPREAD HAZARDOUS WEATHER IS EXPECTED. .SPOTTER INFORMATION STATEMENT... SKYWARN ACTIVATION IS REQUESTED FOR THIS AFTERNOON THROUGH EARLY EVENING. WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS. MARTIN
In the hours before
Local storm report, Aug 26, 9:42 AM PDT, 3 hours 59 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN DIEGO CA
942 AM PDT SUN AUG 26 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0740 AM FLASH FLOOD 1 E ESCONDIDO 33.14N 117.05W
08/26/2007 SAN DIEGO CA TRAINED SPOTTER
TRAINED WEATHER SPOTTERS REPORTED 1.70 INCHES OF RAIN AND
1.89 INCHES OF RAIN IN JUST UNDER 1.5 HOURS FROM A
THUNDERSTORM OVER ESCONDIDO. FLOODING WAS REPORTED IN THE
AREA.
0913 AM HAIL PALOMAR MOUNTAIN 33.36N 116.83W
08/26/2007 M0.25 INCH SAN DIEGO CA TRAINED SPOTTER
A TRAINED SPOTTER MEASURED 3/8 INCH DIAMETER HAIL.
0920 AM HEAVY RAIN 5 ENE ESCONDIDO 33.16N 116.99W
08/26/2007 M2.13 INCH SAN DIEGO CA MESONET
AN ALERT GAGE AT LAKE WOHLFORD MEASURED 2.13 INCHES OF
RAIN FROM A STRONG THUNDERSTORM.
&&
SCVLocal storm report, Aug 26, 12:45 PM PDT, 56 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN DIEGO CA
1245 PM PDT SUN AUG 26 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0915 AM WATER SPOUT 5 SW SAN CLEMENTE 33.40N 117.67W
08/26/2007 PZZ655 CA FIRE DEPT/RESCUE
A WATERSPOUT WAS SIGHTED BY LIFEGUARDS AT SAN CLEMENTE
STATE BEACH. THE EXACT TIME AND LOCATION OF THE
WATERSPOUT IS NOT YET KNOWN BUT SECOND HAND ACCOUNTS
INDICATE THE WATERSPOUT OCCURRED BETWEEN 9 AND 10 AM.
&&
SCVThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 5:40 AM PDT | Marine Weather Statement | SGX | 11 hr | |
| Aug 26, 7:11 AM PDT | Flash Flood Warning | SGX | San Diego | 64 min |
| Aug 26, 8:09 AM PDT | Flash Flood Warning | SGX | San Diego | 51 min |
| Aug 26, 8:26 AM PDT | Special Marine Warning | SGX | 34 min | |
| Aug 26, 12:45 PM PDT | Flash Flood Warning | SGX | San Diego | 60 min |
| Aug 26, 12:54 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 66 min |
| Aug 26, 1:08 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 52 min |
| Aug 26, 3:12 PM PDT | Flash Flood Warning | SGX | San Diego | 93 min |
Nearby
Flash Flood Warnings in California, 2007Every flash flood warning in 2007
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.