Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 67, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 31, 2012, 10:00 AM 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 31, 2012, 10:00 AM PDT (17:00 UTC)
- Expired
- Jul 31, 2012, 12:00 PM PDT
- In force
- 2 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County San Bernardino County, CA
The radar
The Las Vegas radar (KESX), 189 km from the middle of the area, began a volume at 17:00 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, 5.0 hours before the alert went out and 209 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
- 1285 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -27 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
261
WGUS55 KVEF 311700
FFWVEF
CAC071-311900-
/O.NEW.KVEF.FF.W.0067.120731T1700Z-120731T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
1000 AM PDT TUE JUL 31 2012
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTH CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA...
* UNTIL NOON PDT.
* AT 955 AM PDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH
FLOODING ON HIGHWAY 62 APPROXIMATELY 20 MILES EAST OF TWENTYNINE
PALMS. RAIN WILL CONTINUE OVER EXTREME SOUTHERN SAN BERNARDINO
COUNTY THIS MORNING...AND WASHES WILL CONTINUE TO FLOOD.
* LOCATIONS IMPACTED INCLUDE...
HIGHWAY 62 NEAR AND EAST OF TWENTYNINE PALMS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON
AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE
RISING WATER...MOVE TO HIGHER GROUND. 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 3404 11597 3418 11600 3414 11501 3408 11500
3408 11532 3412 11553 3407 11555 3409 11561
3404 11560
$$
MORGAN2 follow-up statements
119
WGUS75 KVEF 311758
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1058 AM PDT TUE JUL 31 2012
CAC071-311900-
/O.CON.KVEF.FF.W.0067.000000T0000Z-120731T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
1058 AM PDT TUE JUL 31 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL NOON PDT FOR SOUTH
CENTRAL SAN BERNARDINO COUNTY...
AT 1056 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE RAIN OVER MUCH OF HIGHWAY 62 FROM TWENTYNINE PALMS
EASTWARD. THE CALIFORNIA HIGHWAY PATROL REPORTED THAT THEY WERE
CLOSING THE HIGHWAY BETWEEN MILE MARKER 62 AND HIGHWAY 177 DUE TO
FLOODING AND DAMAGE TO THE ROAD.
LOCATIONS IMPACTED INCLUDE...
WEST WIND AERO.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON
AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE
RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED
ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN!
REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL
WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG...
NWSVEGAS.
&&
LAT...LON 3404 11597 3418 11600 3414 11501 3408 11500
3408 11532 3412 11553 3407 11555 3409 11561
3404 11560
$$
MORGAN011
WGUS75 KVEF 311908
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1208 PM PDT TUE JUL 31 2012
CAC071-311917-
/O.EXP.KVEF.FF.W.0067.000000T0000Z-120731T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
1208 PM PDT TUE JUL 31 2012
...THE FLASH FLOOD WARNING HAS EXPIRED FOR SOUTH CENTRAL SAN
BERNARDINO COUNTY...
THE FLASH FLOOD WARNING FOR HIGHWAY 62 EAST OF TWENTYNINE PALMS HAS
EXPIRED...BUT HAS BEEN REPLACED BY A NEW WARNING VALID UNTIL 2 PM.
LAT...LON 3404 11597 3418 11600 3414 11501 3408 11500
3408 11532 3412 11553 3407 11555 3409 11561
3404 11560
$$
MORGANThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 5:54 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 51 min |
| Jul 31, 2:29 AM PDT | Flash Flood Watch | VEF | San Bernardino | 19 hr |
| Jul 31, 10:08 AM PDT | Flash Flood Warning | VEF | San Bernardino | 112 min |
| Jul 31, 10:38 AM PDT | Flash Flood Warning | VEF | San Bernardino | 94 min |
| Jul 31, 11:58 AM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Jul 31, 12:03 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Jul 31, 1:30 PM PDT | Flash Flood Warning | VEF | San Bernardino | 49 min |
| Jul 31, 2:00 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Jul 31, 3:05 PM PDT | Flash Flood Warning | VEF | San Bernardino | 42 min |
| Jul 31, 3:25 PM PDT | Flash Flood Warning | VEF | San Bernardino | 65 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.