Alert archive / Nevada / Flash Flood Warnings in 2011
Flash Flood Warning 95, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Sep 14, 2011, 4:35 PM PDT for Clark County, Nevada. It was in force for 55 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
- Sep 14, 2011, 4:35 PM PDT (23:35 UTC)
- Expired
- Sep 14, 2011, 5:30 PM PDT
- In force
- 55 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County Clark County, NV
The radar
The Las Vegas radar (KESX), 91 km from the middle of the area, began a volume at 23:38 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
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 11.6 hours before the alert went out and 237 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
- 224 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 729 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 64 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
292
WGUS55 KVEF 142335
FFWVEF
NVC003-150030-
/O.NEW.KVEF.FF.W.0095.110914T2335Z-110915T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
435 PM PDT WED SEP 14 2011
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
EAST CENTRAL CLARK COUNTY IN SOUTHERN NEVADA...
* UNTIL 530 PM PDT.
* AT 425 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM A THUNDERSTORM OVER EXTREME EAST CENTRAL CLARK
COUNTY...OR 27 MILES SOUTHEAST OF OVERTON. THE STORM PRODUCING VERY
HEAVY RAIN WAS NEARLY STATIONARY.
* LOCATIONS IMPACTED INCLUDE...THE COTTONWOOD WASH ROAD LEADING TO
DEVILS COVE.
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 TWITTER #NWSVEGAS.
&&
LAT...LON 3630 11418 3629 11409 3626 11405 3620 11405
3618 11407 3612 11412 3622 11421
$$
JENSEN2 follow-up statements
427
WGUS75 KVEF 142357
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
457 PM PDT WED SEP 14 2011
NVC003-150030-
/O.CON.KVEF.FF.W.0095.000000T0000Z-110915T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK NV-
457 PM PDT WED SEP 14 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 PM PDT FOR EAST
CENTRAL CLARK COUNTY...
AT 447 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING HEAVY RAIN. THIS STORM WAS
LOCATED OVER EXTREME EAST CENTRAL CLARK COUNTY...OR 28 MILES
SOUTHEAST OF OVERTON. THE THUNDERSTORM WITH EXCESSIVE RAIN WAS NEARLY
STATIONARY.
LOCATIONS IMPACTED INCLUDE...THE COTTONWOOD WASH ROAD LEADING TO
DEVILS COVE ON LAKE MEAD.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON
AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE
RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED
ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN!
REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL
WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS.
&&
LAT...LON 3630 11418 3629 11409 3626 11405 3620 11405
3618 11407 3612 11412 3622 11421
$$
JENSEN236
WGUS75 KVEF 150026
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
526 PM PDT WED SEP 14 2011
NVC003-150033-
/O.EXP.KVEF.FF.W.0095.000000T0000Z-110915T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK NV-
526 PM PDT WED SEP 14 2011
...THE FLASH FLOOD WARNING WILL EXPIRE AT 530 PM PDT FOR EAST CENTRAL
CLARK COUNTY...
THE POTENTIAL FOR HEAVY RAINFALL PRODUCING FLASH FLOODING HAS ENDED
AS THUNDERSTORMS HAVE DECREASED OVER THE COTTONWOOD WASH ROAD
LEADING TO DEVILS COVE IN EXTREME EASTERN CLARK COUNTY.
HOWEVER WATER IS LIKELY FLOWING IN THE NORMALLY DRY WASH. TRAVELERS
IN THE AREA SHOULD BE AWARE OF THIS FLOWING WATER AND BE ESPECIALLY
CAUTIOUS AT LOW WATER CROSSINGS
LAT...LON 3630 11418 3629 11409 3626 11405 3620 11405
3618 11407 3612 11412 3622 11421
$$
JENSENThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 14, 1:19 PM PDT | Flash Flood Watch | VEF | Clark, Lincoln, Nye | 7 hr |
| Sep 14, 1:27 PM PDT | Areal Flood Advisory | VEF | Clark | 111 min |
| Sep 14, 1:52 PM PDT | Flash Flood Warning | VEF | Clark | 92 min |
| Sep 14, 3:13 PM PDT | Areal Flood Advisory | VEF | Clark | 2 hr |
| Sep 14, 4:02 PM PDT | Areal Flood Advisory | VEF | Lincoln | 118 min |
Nearby
Flash Flood Warnings in Nevada, 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.