Alert archive / California / Flash Flood Warnings in 2007
Flash Flood Warning 9, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Nov 30, 2007, 10:53 PM PST for San Diego County, California. It was in force for 4 hr. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Nov 30, 2007, 10:53 PM PST (06:53 UTC)
- Expired
- Dec 1, 2007, 3:00 AM PST
- In force
- 4 hr
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- Flood severity
- None
County San Diego County, CA
The radar
The San Diego radar (KNKX), 26 km from the middle of the area, began a volume at 06:56 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 |
|---|---|---|---|
| Nov 30, 11:30 PM PST | FLASH FLOOD | 2 Ne Valley Center, CA | HIGHWAY 76 CLOSED DUE TO ROCKS, MUD AND TREES OVER ROADWAY NEAR LA JOLLA INDIAN RESERVATION. |
| Nov 30, 11:51 PM PST | FLASH FLOOD | 5 W Julian, CA | FLOODING AND A 100 FOOT WIDE MUD SLIDE BLOCKING HWY 78 AT DEER CANYON ROAD. |
| Dec 1, 12:01 AM PST | FLASH FLOOD | 5 W Rancho Bernardo, CA | MUD OR ROCK SLIDE BLOCKING ONE THIRD OF THE LANE ON DEL DIOS HIGHWAY AT LAKE HODGES DAM. |
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 00:00Z, 6.9 hours before the alert went out and 45 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
- 178 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 547 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 120 m²/s²
- 0-3 km storm-relative helicity
- 22 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 010658
FFWSGX
CAC073-010900-
/O.NEW.KSGX.FF.W.0009.071201T0653Z-071201T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
1053 PM PST FRI NOV 30 2007
THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL SAN DIEGO COUNTY IN SOUTHWEST CALIFORNIA...
THIS INCLUDES THE CITIES OF...RAMONA...POWAY...
* UNTIL 100 AM PST
* LOCATIONS IN THE WARNING INCLUDE THE POOMACHA AND WITCH CREEK FIRE
BURN AREAS
NUMEROUS LIGHT TO OCCASIONALLY MODERATE SHOWERS WILL CONTINUE TO
MOVE ACROSS THE POOMACHA AND WITCH CREEK FIRE BURN AREAS. RUNOFF
FROM EARLIER RAINFALL AND ADDITIONAL RAIN FALLING ON SATURATED SOIL
COULD CAUSE MUD AND DEBRIS FLOWS.
DEBRIS FLOWS...INCLUDING MUD AND ROCK SLIDES...ARE EXPECTED WITH THIS
STORM. MUD SLIDES AND ROCK SLIDES CAN POTENTIALLY TRAP AND KILL
PEOPLE CAUGHT IN THEIR PATH.
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 3322 11676 3301 11663 3288 11680 3297 11700
3302 11719 3318 11701 3341 11698
TIME...MOT...LOC 0653Z 279DEG 0KT 3277 11721 3253 11726
$$
MARTIN2 follow-up statements
000
WGUS56 KSGX 010816
FFWSGX
CAC073-011100-
/O.EXT.KSGX.FF.W.0009.000000T0000Z-071201T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
1212 AM PST SAT DEC 1 2007
THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS EXTENDED THE
* FLASH FLOOD WARNING FOR...
CENTRAL SAN DIEGO COUNTY IN SOUTHWEST CALIFORNIA...
THIS INCLUDES THE CITIES OF...RAMONA...POWAY...
* UNTIL 300 AM PST
* AT 1206 AM PST...RADAR SHOWED SHOWERS...SOME WITH MODERATE
RAINFALL...CONTINUING ACROSS THE POOMACHA AND WITCH CREEK FIRE
BURN AREAS WITH REPORTS OF LOCAL MUD AND DEBRIS FLOWS.
* LOCATIONS IN THE WARNING INCLUDE THE POOMACHA AND WITCH CREEK FIRE
BURN AREAS
NUMEROUS SHOWERS...SOME WITH MODERATE RAINFALL...WILL CONTINUE
THROUGH 1 AM. SHOWERS ARE EXPECTED TO DECREASE FROM THE WEST AFTER 1
AM. RUNOFF FROM RECENT RAINFALL WILL CONTINUE THE NEXT FEW HOURS
WITH MUD AND DEBRIS FLOWS POSSIBLE.
DEBRIS FLOWS...INCLUDING MUD AND ROCK SLIDES...ARE EXPECTED WITH THIS
STORM. MUD SLIDES AND ROCK SLIDES CAN POTENTIALLY TRAP AND KILL
PEOPLE CAUGHT IN THEIR PATH.
RESIDENTS AND MOTORISTS IN AND BELOW RECENTLY BURNED AREAS SHOULD BE
ALERT TO HEAVY MUD AND DEBRIS FLOWS WHICH MAY BLOCK ROADS AND
CULVERTS. POTENTIALLY DANGEROUS FLOODING AND PROPERTY LOSS COULD
RESULT IN AREAS WHERE RUNOFF IS RESTRICTED OR BLOCKED. ADDITIONAL
RAINFALL AMOUNTS OF ONE QUARTER TO ONE THIRD INCH ARE POSSIBLE IN
THE WARNED AREA THROUGH 2 AM.
LAT...LON 3322 11676 3301 11663 3288 11680 3297 11700
3302 11719 3318 11701 3341 11698
TIME...MOT...LOC 0812Z 180DEG 0KT 3277 11721 3253 11726
$$
MARTIN000 WGUS76 KSGX 011059 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 259 AM PST SAT DEC 1 2007 CAC073-011109- /O.EXP.KSGX.FF.W.0009.000000T0000Z-071201T1100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN DIEGO CA- 259 AM PST SAT DEC 1 2007 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 300 AM PST FOR CENTRAL SAN DIEGO COUNTY FOR THE POOMACHA AND WITCH CREEK FIRE BURN AREAS... MOST RAINFALL HAS ENDED WITH ONLY A FEW LIGHT SHOWERS POSSIBLE. PLEASE BE ALERT FOR LOWER LYING AREAS WHERE WATER OR MUD MAY STILL COVER THE ROAD. $$ MARTIN
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 30, 9:05 PM PST | Flash Flood Warning | SGX | San Diego | 115 min |
| Nov 30, 11:10 PM PST | Flash Flood Warning | SGX | San Diego | 2 hr |
| Dec 1, 12:48 AM PST | Flash Flood Warning | SGX | San Diego | 117 min |
| Dec 1, 8:40 AM PST | Wind Advisory | SGX | Riverside, San Bernardino, San Diego | 12 hr |
| Dec 1, 1:39 PM PST | High Surf Advisory | SGX | San Diego | 6 hr |
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.