Alert archive / California / Flash Flood Warnings in 2011
Flash Flood Warning 2, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Jul 6, 2011, 12:52 PM PDT for San Bernardino County, California. It was in force for 100 min. 2 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
- Jul 6, 2011, 12:52 PM PDT (19:52 UTC)
- Expired
- Jul 6, 2011, 2:32 PM PDT
- In force
- 100 min
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- Flood severity
- None
County San Bernardino County, CA
The radar
The Santa Ana Mts radar (KSOX), 61 km from the middle of the area, began a volume at 19:54 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 |
|---|---|---|---|
| Jul 6, 1:30 PM PDT | FLOOD | 1 Sw Phelan, CA | ROCKS ON HIGHWAY 138 FROM FLOOD. |
| Jul 6, 1:49 PM PDT | FLOOD | Wrightwood, CA | INTERSECTION OF HWY 18 AND SHEEP CREEK RD 1.5FT OF WATER ON ROADWAY.25 CARS ARE STRANDED ON THE SIDE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Edwards AFB, CA (KEDW), launched 12:00Z, 7.9 hours before the alert went out and 62 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
- 26 J/kg
- Mixed-layer CIN
- -273 J/kg
- Mixed-layer LCL
- 2088 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 90 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
238
WGUS56 KSGX 061952
FFWSGX
CAC071-062145-
/O.NEW.KSGX.FF.W.0002.110706T1952Z-110706T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
1252 PM PDT WED JUL 6 2011
THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHWESTERN SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA...
THIS INCLUDES THE CITY OF WRIGHTWOOD...
* UNTIL 245 PM PDT
* AT 1248 PM PDT...NATIONAL WEATHER SERVICE RADAR INDICATED VERY HEAVY
RAIN JUST WEST OF WRIGHTWOOD. THE STORM WAS SLOW MOVING AND HAS
THE POTENTIAL FOR FLASH FLOODING. THOSE NEAR CREEKS OR LOW LYING
AREAS SHOULD EVACUATE.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
WRIGHTWOOD AND PHELAN.
LAT...LON 3443 11756 3434 11754 3428 11765 3429 11765
3434 11766 3441 11766 3442 11766
$$
TARDY2 follow-up statements
394
WGUS76 KSGX 062042
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
142 PM PDT WED JUL 6 2011
CAC071-062145-
/O.CON.KSGX.FF.W.0002.000000T0000Z-110706T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
142 PM PDT WED JUL 6 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 245 PM PDT FOR
SOUTHWESTERN SAN BERNARDINO COUNTY...
AT 133 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE THUNDERSTORMS PRODUCING VERY HEAVY RAIN OVER AND NEAR
THE WARNED AREA.
RAINFALL WAS MEASURED JUST OVER 1 INCH NEAR PHELAN. WHILE
THE HEAVIEST RAIN HAS MOVED TO THE NORTH...RUNOFF WILL CONTINUE
FROM THE THUNDERSTORM.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WRIGHTWOOD
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.
&&
LAT...LON 3443 11756 3434 11754 3428 11765 3429 11765
3434 11766 3441 11766 3442 11766
$$
TARDY554
WGUS76 KSGX 062132
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
232 PM PDT WED JUL 6 2011
CAC071-062141-
/O.CAN.KSGX.FF.W.0002.000000T0000Z-110706T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
232 PM PDT WED JUL 6 2011
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHWESTERN SAN
BERNARDINO COUNTY...
HEAVY RAIN HAS TAPERED OFF OVER THE WARNING AREA EXCEPT ALONG
THE SAN GRABIEL AND SAN BERNARDINO DIVIDE.
THE WARNING HAS EXPIRED FOR PARTS OF SOUTHWEST SAN BERNARDINO COUNTY
BUT REMAINS IN EFFECT FOR PHELAN AND HIGHWAY 138.
LAT...LON 3443 11756 3434 11754 3428 11765 3429 11765
3434 11766 3441 11766 3442 11766
$$
TARDYThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 5:12 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 48 min |
| Jul 6, 12:14 PM PDT | Special Weather Statement | SGX | San Diego | 61 min |
| Jul 6, 12:55 PM PDT | Flash Flood Warning | SGX | San Diego | 50 min |
| Jul 6, 1:01 PM PDT | Flash Flood Watch | SGX | Riverside, San Bernardino, San Diego | 7 hr |
| Jul 6, 1:15 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 45 min |
| Jul 6, 1:31 PM PDT | Flash Flood Warning | SGX | Riverside, San Diego | 59 min |
| Jul 6, 1:48 PM PDT | Flash Flood Warning | SGX | San Bernardino | 87 min |
| Jul 6, 2:48 PM PDT | Severe Thunderstorm Warning | SGX | Riverside | 42 min |
| Jul 6, 2:56 PM PDT | Areal Flood Advisory | SGX | Riverside, San Bernardino | 2 hr |
| Jul 6, 4:00 PM PDT | Areal Flood Advisory | SGX | Riverside, San Bernardino | 90 min |
| Jul 6, 4:27 PM PDT | Special Weather Statement | SGX | San Diego | 63 min |
Nearby
Flash Flood Warnings in California, 2011Every flash flood warning in 2011
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.