Alert archive / California / Flash Flood Warnings in 2011
Flash Flood Warning 7, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Jul 30, 2011, 12:33 PM PDT for San Bernardino County, California. It was in force for 2 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
- Jul 30, 2011, 12:33 PM PDT (19:33 UTC)
- Expired
- Jul 30, 2011, 2:45 PM PDT
- In force
- 2 hr
- 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), 99 km from the middle of the area, began a volume at 19:33 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.
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 7.6 hours before the alert went out and 173 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
- 657 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
901 WGUS56 KSGX 301933 FFWSGX CAC071-302130- /O.NEW.KSGX.FF.W.0007.110730T1933Z-110730T2130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN DIEGO CA 1233 PM PDT SAT JUL 30 2011 THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTH CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... * UNTIL 230 PM PDT * AT 1224 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM A STORM OVER THE WARNED AREA. RADAR ESTIMATES OF 1 TO 2 INCHES HAVE OCCURRED IN 2 BASINS...JUST NORTH OF ONYX PEAK IN THE SAN BERNARDINO MOUNTAINS. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BIG BEAR CITY HIGHWAY 38 AND DRAINAGE AREAS NORTH OF ONYX PEAK. PRECAUTIONARY/PREPAREDNESS ACTIONS... ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE EXPECTED IN THE WARNING AREA AND DRAINAGE AREAS NORTH OF ONYX PEAK. THIS INCLUDES PARTS OF BIG BEAR CITY. RUNOFF WILL DRAIN TOWARDS JOHNSON VALLEY AND AND DRAINAGE CREEKS TO THE NORTH. && LAT...LON 3441 11672 3439 11658 3412 11668 3418 11697 $$ TARDY
3 follow-up statements
111 WGUS76 KSGX 302013 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 113 PM PDT SAT JUL 30 2011 CAC071-302130- /O.CON.KSGX.FF.W.0007.000000T0000Z-110730T2130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 113 PM PDT SAT JUL 30 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 230 PM PDT FOR SOUTH CENTRAL SAN BERNARDINO COUNTY... AT 106 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE HEAVY RAIN PRODUCING FLASH FLOODING OVER THE WARNED AREA. THE HEAVIEST RAIN HAS MOVED OFF THE MOUNTAINS AND INTO JOHNSON VALLEY. FLASH FLOODING IN RURAL CREEKS AND DRY WASHES WILL CONTINUE DUE TO SEVERAL BASINS RECEIVING 1 TO 2 INCHES OF RAIN IN 1 HOUR. THE LARGEST RUNOFF WILL OCCUR ON THE NORTH SLOPES DOWN TO JOHNSON VALLEY INCLUDING AREAS BETWEEN ROUTES 18 AND 247. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS. && LAT...LON 3441 11672 3439 11658 3412 11668 3418 11697 $$ TARDY
877 WGUS56 KSGX 302059 FFWSGX CAC071-302145- /O.EXT.KSGX.FF.W.0007.000000T0000Z-110730T2145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN DIEGO CA 159 PM PDT SAT JUL 30 2011 THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS EXTENDED THE * FLASH FLOOD WARNING FOR... SOUTH CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... * UNTIL 245 PM PDT * AT 145 PM PDT...RAINFALL HAS ENDED...TEMPORARILY...BUT RUNOFF WILL CONTINUE INTO THE JOHNSON VALLEY. THEREFORE THE WARNING CONTINUES. 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 3441 11672 3439 11658 3412 11668 3418 11697 $$ TARDY
456 WGUS76 KSGX 302149 FFSSGX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 249 PM PDT SAT JUL 30 2011 CAC071-302159- /O.EXP.KSGX.FF.W.0007.000000T0000Z-110730T2145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 249 PM PDT SAT JUL 30 2011 ...THE FLASH FLOOD WARNING HAS EXPIRED FOR SOUTH CENTRAL SAN BERNARDINO COUNTY... RAINFALL HAS ENDED OVER THE WARNED AREA AND THE THREAT FOR FLASH FLOODING HAS GREATLY DIMINISHED. LAT...LON 3441 11672 3439 11658 3412 11668 3418 11697 $$ TARDY
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 2:53 AM PDT | Flash Flood Watch | SGX | Riverside, San Bernardino, San Diego | 17 hr |
| Jul 30, 12:58 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 32 min |
| Jul 30, 1:26 PM PDT | Areal Flood Advisory | SGX | San Bernardino | 2 hr |
| Jul 30, 1:39 PM PDT | Flash Flood Warning | SGX | San Bernardino | 96 min |
| Jul 30, 1:41 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 49 min |
| Jul 30, 2:13 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 32 min |
| Jul 30, 2:30 PM PDT | Flash Flood Warning | SGX | San Bernardino | 2 hr |
| Jul 30, 3:34 PM PDT | Areal Flood Advisory | SGX | San Bernardino | 116 min |
| Jul 30, 3:46 PM PDT | Areal Flood Advisory | SGX | San Diego | 119 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.