Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 112, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 12, 2012, 2:46 PM PDT for San Bernardino County, California. It was in force for 119 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 12, 2012, 2:46 PM PDT (21:46 UTC)
- Expired
- Aug 12, 2012, 4:45 PM PDT
- In force
- 119 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County San Bernardino County, CA
The radar
The Santa Ana Mts radar (KSOX), 149 km from the middle of the area, began a volume at 21:47 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, 9.8 hours before the alert went out and 184 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
- 552 J/kg
- Mixed-layer CIN
- -580 J/kg
- Mixed-layer LCL
- 1680 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
240
WGUS55 KVEF 122146
FFWVEF
CAC071-122345-
/O.NEW.KVEF.FF.W.0112.120812T2146Z-120812T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
246 PM PDT SUN AUG 12 2012
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTH CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA...
* UNTIL 445 PM PDT.
* AT 240 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM A THUNDERSTORM NEAR TWENTYNINE PALMS. THE
STORM PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY.
* LOCATIONS IMPACTED INCLUDE...
HIGHWAY 62 NEAR TWENTYNINE PALMS AND TWENTYNINE PALMS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES...
AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS
NATURES NUMBER ONE KILLER. NEVER TRY TO CROSS A FLOODED ROADWAY OR
WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN!
REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL
WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG...
NWSVEGAS.
&&
LAT...LON 3420 11602 3410 11602 3412 11605 3412 11616
3420 11616
$$
JS2 follow-up statements
263
WGUS75 KVEF 122304
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
404 PM PDT SUN AUG 12 2012
CAC071-122345-
/O.CON.KVEF.FF.W.0112.000000T0000Z-120812T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
404 PM PDT SUN AUG 12 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM PDT FOR SOUTH
CENTRAL SAN BERNARDINO COUNTY...
AT 400 PM PDT...THUNDERSTORMS HAVE WEAKENED NEAR TWENTYNINE PALMS
BUT EARLIER HEAVY RAIN WILL STILL IMPACT HIGHWAY 62 AND LOCAL ROADS
IN THE VICINITY OF TWENTYNINE PALMS WITH WATER AND DEBRIS OVER
ROADWAYS. TRAVELERS ALONG HIGHWAY 62 FROM TWENTYNINE PALMS AND WEST
SHOULD REMAIN ALERT TO FLOODED ROADS AND USE CAUTION IN THE WARNING
AREA.
LOCATIONS IMPACTED INCLUDE...
TWENTYNINE PALMS AND HIGHWAY 62.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES...
AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS
NATURES NUMBER ONE KILLER. NEVER TRY TO CROSS A FLOODED ROADWAY OR
WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN!
REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL
WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG...
NWSVEGAS.
&&
LAT...LON 3420 11602 3410 11602 3412 11605 3412 11616
3420 11616
$$
JS201
WGUS75 KVEF 122344
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
444 PM PDT SUN AUG 12 2012
CAC071-122352-
/O.EXP.KVEF.FF.W.0112.000000T0000Z-120812T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
444 PM PDT SUN AUG 12 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 445 PM PDT FOR SOUTH
CENTRAL SAN BERNARDINO COUNTY...
THUNDERSTORMS HAVE ENDED AND FLASH FLOODING IS NOW LONGER EXPECTED
NEAR TWENTYNINE PALMS. MOTORISTS SHOULD CONTINUE TO USE CAUTION AS
THEY TRAVEL WEST OF THE TWENTYNINE PALMS AREA ON HIGHWAY 62 DUE TO
HEAVY RAINFALL AND FLOODING FURTHER WEST.
LAT...LON 3420 11602 3410 11602 3412 11605 3412 11616
3420 11616
$$
JSThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 1:41 PM PDT | Areal Flood Advisory | VEF | Inyo | 3 hr |
| Aug 12, 3:18 PM PDT | Flash Flood Warning | VEF | San Bernardino | 117 min |
Nearby
Flash Flood Warnings in California, 2012Every flash flood warning in 2012
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.