Alert archive / Nevada / Flash Flood Warnings in 2012
Flash Flood Warning 139, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 21, 2012, 1:19 PM PDT for Clark County, Nevada. It was in force for 116 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 21, 2012, 1:19 PM PDT (20:19 UTC)
- Expired
- Aug 21, 2012, 3:15 PM PDT
- In force
- 116 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), 119 km from the middle of the area, began a volume at 20:21 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, 8.3 hours before the alert went out and 70 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
- 108 J/kg
- Mixed-layer CIN
- -245 J/kg
- Mixed-layer LCL
- 2596 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- -46 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
348
WGUS55 KVEF 212019
FFWVEF
NVC003-212215-
/O.NEW.KVEF.FF.W.0139.120821T2019Z-120821T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
119 PM PDT TUE AUG 21 2012
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTH CENTRAL CLARK COUNTY IN SOUTHERN NEVADA...
* UNTIL 315 PM PDT.
* AT 112 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM A THUNDERSTORM NEAR COYOTE SPRINGS...OR 20
MILES NORTHWEST OF MOAPA. THE STORM PRODUCING VERY HEAVY RAIN
WAS MOVING NORTHEAST AT ABOUT 5 MPH.
* LOCATIONS IMPACTED INCLUDE...
COYOTE SPRINGS.
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 3674 11502 3685 11503 3685 11477 3672 11481
3672 11495
$$
WOLCOTT2 follow-up statements
379
WGUS75 KVEF 212130
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
230 PM PDT TUE AUG 21 2012
NVC003-212215-
/O.CON.KVEF.FF.W.0139.000000T0000Z-120821T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK NV-
230 PM PDT TUE AUG 21 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 PM PDT FOR NORTH
CENTRAL CLARK COUNTY...
AT 222 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SHOWERS AND THUNDERSTORMS PRODUCING HEAVY RAIN. THESE
STORMS WERE LOCATED NEAR THE INTERSECTION OF SR 168 AND US 93 NEAR
COYOTE SPRINGS. THE STORMS WERE MOVING NORTHEAST AT 5 MPH.
LOCATIONS IMPACTED INCLUDE...
MAINLY RURAL AREAS OF EXTREME NORTHERN CLARK COUNTY...INCLUDING
COYOTE SPRINGS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON
AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE
RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED
ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN!
REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL
WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG...
NWSVEGAS.
&&
LAT...LON 3674 11502 3685 11503 3685 11477 3672 11481
3672 11495
$$
WOLCOTT190
WGUS75 KVEF 212208
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
308 PM PDT TUE AUG 21 2012
NVC003-212216-
/O.EXP.KVEF.FF.W.0139.000000T0000Z-120821T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK NV-
308 PM PDT TUE AUG 21 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 315 PM PDT FOR NORTH
CENTRAL CLARK COUNTY...
THE STORMS THAT IMPACTED THE COYOTE SPRINGS AREA HAVE WEAKENED AN
MOVED OUT OF THE AREA. MINIMAL IMPACTS WERE REPORTED IN THE AREA.
PLEASE REPORT SIGNIFICANT WEATHER OR FLOODING TO THE NATIONAL
WEATHER SERVICE IN LAS VEGAS AT 1-800-240-4932.
LAT...LON 3674 11502 3685 11503 3685 11477 3672 11481
3672 11495
$$
WOLCOTTThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 11:39 AM PDT | Flash Flood Watch | VEF | Clark, Esmeralda, Lincoln, Nye | 36 hr |
| Aug 21, 1:09 PM PDT | Severe Thunderstorm Warning | VEF | Clark, Lincoln | 36 min |
| Aug 21, 1:42 PM PDT | Flash Flood Warning | VEF | Lincoln | 113 min |
| Aug 21, 2:47 PM PDT | Special Weather Statement | VEF | 43 min | |
| Aug 21, 4:09 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 51 min |
Nearby
Flash Flood Warnings in Nevada, 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.