Alert archive / Nevada / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 41, NWS Las Vegas, NV
NWS Las Vegas, NV issued this severe thunderstorm warning at Aug 21, 2012, 1:09 PM PDT for Clark County, Lincoln County, Nevada. It was in force for 36 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, 1:09 PM PDT (20:09 UTC)
- Expired
- Aug 21, 2012, 1:45 PM PDT
- In force
- 36 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
Counties Clark County, NV, Lincoln County, NV
The radar
The Las Vegas radar (KESX), 122 km from the middle of the area, began a volume at 20:12 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, 8.2 hours before the alert went out and 75 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.
505
WUUS55 KVEF 212009
SVRVEF
NVC003-017-212045-
/O.NEW.KVEF.SV.W.0041.120821T2009Z-120821T2045Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
109 PM PDT TUE AUG 21 2012
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTH CENTRAL LINCOLN COUNTY IN SOUTH CENTRAL NEVADA...
NORTH CENTRAL CLARK COUNTY IN SOUTHERN NEVADA...
* UNTIL 145 PM PDT.
* AT 104 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
COYOTE SPRINGS...OR 20 MILES NORTHWEST OF MOAPA...AND WAS MOVING
EAST AT 5 TO 10 MPH.
* LOCATIONS IMPACTED INCLUDE...
SR 168 MILE MARKER 21...AND
COYOTE SPRINGS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM IS CAPABLE OF PRODUCING DAMAGING WINDS WHICH CAN BRING
DOWN TREES AND POWER LINES AND CAUSE SIGNIFICANT BLOWING DUST AND
DEBRIS. IN ADDITION...HAIL AND LIGHTNING ARE LIKELY. LIGHTNING CAN
KILL! TAKE COVER IN A SUBSTANTIAL SHELTER AND STAY AWAY FROM WINDOWS
UNTIL THE STORM PASSES.
REPORT SEVERE WEATHER BY POSTING YOUR REPORT TO THE LAS VEGAS
NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER
HASHTAG...NWSVEGAS.
&&
LAT...LON 3699 11473 3670 11465 3663 11493 3665 11512
3685 11516
TIME...MOT...LOC 2008Z 257DEG 8KT 3680 11493
$$
WOLCOTT2 follow-up statements
598
WWUS55 KVEF 212033
SVSVEF
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
133 PM PDT TUE AUG 21 2012
NVC003-017-212045-
/O.CON.KVEF.SV.W.0041.000000T0000Z-120821T2045Z/
CLARK NV-LINCOLN NV-
133 PM PDT TUE AUG 21 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM PDT
FOR SOUTH CENTRAL LINCOLN AND NORTH CENTRAL CLARK COUNTIES...
AT 125 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED NEAR SR 168 MILE MARKER 21...OR 18 MILES NORTHWEST OF
MOAPA...AND WAS MOVING EAST AT 5 TO 10 MPH.
AT 125 PM PDT...THE PUBLIC REPORTED VERY HEAVY RAIN ASSOCIATED WITH
THIS STORM. A FLASH FLOOD WARNING HAS ALSO BEEN ISSUED FOR THE
COYOTE SPRING AREA.
LOCATIONS IMPACTED INCLUDE...
MAINLY RURAL AREAS OF EXTREME NORTHERN CLARK AND SOUTHERN LINCOLN
COUNTIES...INCLUDING COYOTE SPRINGS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM IS CAPABLE OF PRODUCING DAMAGING WINDS WHICH CAN BRING
DOWN TREES AND POWER LINES AND CAUSE SIGNIFICANT BLOWING DUST AND
DEBRIS. IN ADDITION...HAIL AND LIGHTNING ARE LIKELY. LIGHTNING CAN
KILL! TAKE COVER IN A SUBSTANTIAL SHELTER AND STAY AWAY FROM WINDOWS
UNTIL THE STORM PASSES.
REPORT SEVERE WEATHER BY POSTING YOUR REPORT TO THE LAS VEGAS
NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER
HASHTAG...NWSVEGAS.
&&
LAT...LON 3699 11473 3670 11465 3663 11493 3665 11512
3685 11516
TIME...MOT...LOC 2030Z 257DEG 8KT 3681 11487
$$
WOLCOTT570
WWUS55 KVEF 212043
SVSVEF
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
143 PM PDT TUE AUG 21 2012
NVC003-017-212051-
/O.EXP.KVEF.SV.W.0041.000000T0000Z-120821T2045Z/
CLARK NV-LINCOLN NV-
143 PM PDT TUE AUG 21 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL LINCOLN AND
NORTH CENTRAL CLARK COUNTIES WILL BE ALLOWED TO EXPIRE AT 145 PM
PDT...
THE STORM HAS WEAKENED OVER THE PAST 10 TO 15 MINUTES.
HOWEVER...RAINFALL WILL CONTINUE IN THE AREA AND THE FLASH FLOOD
WARNING REMAINS IN EFFECT.
LAT...LON 3699 11473 3670 11465 3663 11493 3665 11512
3685 11516
TIME...MOT...LOC 2041Z 257DEG 8KT 3682 11484
$$
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, 1:19 PM PDT | Flash Flood Warning | VEF | Clark | 116 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
Severe Thunderstorm Warnings in Nevada, 2012Every severe thunderstorm 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.