Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 7, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 13, 2012, 4:09 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 13, 2012, 4:09 PM PDT (23:09 UTC)
- Expired
- Jul 13, 2012, 6:15 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), 111 km from the middle of the area, began a volume at 23:12 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
Las Vegas, NV (KVEF), launched 12:00Z, 11.2 hours before the alert went out and 188 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2268 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 25 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.
789
WGUS55 KVEF 132309
FFWVEF
CAC071-140115-
/O.NEW.KVEF.FF.W.0007.120713T2309Z-120714T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
409 PM PDT FRI JUL 13 2012
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
EAST CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA...
* UNTIL 615 PM PDT.
* AT 400 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM A THUNDERSTORM 10 MILES SOUTHEAST OF ESSEX...
OR 32 MILES SOUTHEAST OF MITCHELL CAVERNS. THE STORM PRODUCING VERY
HEAVY RAIN WAS NEARLY STATIONARY.
* LOCATIONS IMPACTED INCLUDE...
ESSEX AND THE EXTREME EASTERN PORTION OF THE NATIONAL TRAILS
HIGHWAY.
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 3478 11523 3482 11499 3477 11477 3449 11505
3468 11537
$$
JENSEN2 follow-up statements
926
WGUS75 KVEF 132357
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
457 PM PDT FRI JUL 13 2012
CAC071-140115-
/O.CON.KVEF.FF.W.0007.000000T0000Z-120714T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
457 PM PDT FRI JUL 13 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM PDT FOR EAST
CENTRAL SAN BERNARDINO COUNTY...
AT 447 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM WHICH IS LIKELY PRODUCING LOCALLY HEAVY
RAINFALL. THIS STORM WAS LOCATED NEAR ESSEX...OR 22 MILES SOUTHEAST
OF MITCHELL CAVERNS.
THE THUNDERSTORM IS NEARLY STATIONARY AND IS CURRENTLY
DECREASING...HOWEVER ANY ADDITIONAL RAINFALL WILL ADD TO THAT WHICH
HAS ALREADY FALLEN AND INCREASE RUNOFF.
LOCATIONS IMPACTED INCLUDE...
ESSEX AND THE EXTREME EASTERN PORTION OF THE NATIONAL TRAILS
HIGHWAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON
AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE
RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED
ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN!
REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL
WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG...
NWSVEGAS.
&&
LAT...LON 3478 11523 3482 11499 3477 11477 3449 11505
3468 11537
$$
JENSEN797
WGUS75 KVEF 140108
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
608 PM PDT FRI JUL 13 2012
CAC071-140115-
/O.EXP.KVEF.FF.W.0007.000000T0000Z-120714T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
608 PM PDT FRI JUL 13 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 615 PM PDT FOR EAST CENTRAL
SAN BERNARDINO COUNTY...
THUNDERSTORMS HAVE DECREASED OVER THE WARNED AREA. HOWEVER RUNOFF
FROM THE THUNDERSTORMS WILL LIKELY BE FLOWING THROUGH NORMALLY DRY
WASHES AND PONDING OF WATER MAY BE ENCOUNTERED THROUGH THE NIGHT.
THE MAIN AREA OF CONCERN WILL BE ALONG THE NATIONAL TRAILS HIGHWAY
NEAR ESSEX.
ADDITIONAL THUNDERSTORMS WHICH HAVE FORMED TO THE SOUTH OF THE AREA
MAY MOVE OVER THE SAME REGION LATER THIS EVENING AND WILL BE CLOSELY
MONITORED.
LAT...LON 3478 11523 3482 11499 3477 11477 3449 11505
3468 11537
$$
JENSENThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 6:03 AM PDT | Areal Flood Advisory | VEF | San Bernardino | 117 min |
| Jul 13, 7:03 AM PDT | Areal Flood Advisory | VEF | San Bernardino | 117 min |
| Jul 13, 1:22 PM PDT | Flash Flood Warning | VEF | Inyo | 113 min |
| Jul 13, 2:55 PM PDT | Flash Flood Warning | VEF | Inyo | 2 hr |
| Jul 13, 3:51 PM PDT | Flash Flood Warning | VEF | San Bernardino | 114 min |
| Jul 13, 4:16 PM PDT | Flash Flood Warning | VEF | Inyo | 119 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.