Alert archive / Nevada / Flash Flood Warnings in 2012
Flash Flood Warning 214, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Oct 11, 2012, 2:53 PM PDT for Clark County, Nevada. It was in force for 39 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
- Oct 11, 2012, 2:53 PM PDT (21:53 UTC)
- Expired
- Oct 11, 2012, 3:32 PM PDT
- In force
- 39 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), 67 km from the middle of the area, began a volume at 21:53 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, 9.9 hours before the alert went out and 30 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
- 327 J/kg
- Mixed-layer CIN
- -89 J/kg
- Mixed-layer LCL
- 958 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 146 m²/s²
- 0-3 km storm-relative helicity
- 316 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 3.9
The text
As transmitted, in the capitals the NWS used until 2016.
026
WGUS55 KVEF 112153
FFWVEF
NVC003-112345-
/O.NEW.KVEF.FF.W.0214.121011T2153Z-121011T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
253 PM PDT THU OCT 11 2012
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL CLARK COUNTY IN SOUTHERN NEVADA...
* UNTIL 445 PM PDT.
* AT 250 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM A THUNDERSTORM NEAR RED ROCK CANYON
CAMPGROUND...OR NEAR RED ROCK CANYON. THE STORM PRODUCING VERY
HEAVY RAIN WAS MOVING NORTH AT 10 TO 15 MPH. RAINFALL TOTALS IN
EXCESS OF A HALF AN INCH AN HOUR ARE POSSIBLE WITH THIS STORM. LOW
SPOTS ALONG HIGHWAY 159 IN BETWEEN RED ROCK CANYON AND SUMMERLIN
WILL SEE WATER FLOW THEM ALONG WITH POSSIBLE MUD AND ROCKS.
* LOCATIONS IMPACTED INCLUDE...
RED ROCK CANYON...RED ROCK CANYON CAMPGROUND AND ROCKY GAP
CAMPGROUND.
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 3617 11551 3622 11535 3602 11533 3606 11541
3609 11544
$$
STACHELSKI2 follow-up statements
227
WGUS75 KVEF 112207
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
307 PM PDT THU OCT 11 2012
NVC003-112345-
/O.CON.KVEF.FF.W.0214.000000T0000Z-121011T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK NV-
307 PM PDT THU OCT 11 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM PDT FOR
CENTRAL CLARK COUNTY...
AT 305 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN. THE STORM
PRODUCING VERY HEAVY RAIN WAS MOVING NORTH AT 10 TO 15 MPH. RAINFALL
TOTALS IN EXCESS OF A HALF AN INCH AN HOUR ARE POSSIBLE WITH THIS
STORM. LOW SPOTS ALONG HIGHWAY 159 IN BETWEEN RED ROCK CANYON AND
SUMMERLIN WILL SEE WATER FLOW IN THEM ALONG WITH POSSIBLE MUD AND
ROCKS WASH IN THEM.
LOCATIONS IMPACTED INCLUDE...
RED ROCK CANYON AND ROCKY GAP CAMPGROUND.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON
AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE
RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED
ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN!
REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL
WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG...
NWSVEGAS.
&&
LAT...LON 3617 11551 3622 11535 3602 11533 3606 11541
3609 11544
$$
STACHELSKI489
WGUS75 KVEF 112232
FFSVEF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
332 PM PDT THU OCT 11 2012
NVC003-112241-
/O.CAN.KVEF.FF.W.0214.000000T0000Z-121011T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK NV-
332 PM PDT THU OCT 11 2012
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL CLARK
COUNTY...
THUNDERSTORMS HAVE MOVED AWAY FROM THE RED ROCK CANYON AREA AND THE
THREAT FOR ANY HEAVY RAIN HAS ENDED AT THIS TIME. THEREFORE THE
FLASH FLOOD WARNING HAS BEEN CANCELLED FOR THIS AREA.
LAT...LON 3617 11551 3622 11535 3602 11533 3606 11541
3609 11544
$$
STACHELSKIThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 11, 1:39 AM PDT | Areal Flood Advisory | VEF | Clark | 81 min |
| Oct 11, 8:22 AM PDT | Areal Flood Advisory | VEF | Clark | 7 hr |
| Oct 11, 8:39 AM PDT | Flash Flood Warning | VEF | Clark | 111 min |
| Oct 11, 11:48 AM PDT | Areal Flood Advisory | VEF | Clark | 2 hr |
| Oct 11, 1:51 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 24 min |
| Oct 11, 4:18 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 27 min |
| Oct 11, 4:53 PM PDT | Flash Flood Warning | VEF | Clark | 112 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.