Alert archive / Nevada / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 57, NWS Las Vegas, NV
NWS Las Vegas, NV issued this severe thunderstorm warning at Sep 11, 2012, 2:16 PM PDT for Clark County, Nevada; Mohave County, Arizona. It was in force for 44 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 11, 2012, 2:16 PM PDT (21:16 UTC)
- Expired
- Sep 11, 2012, 3:00 PM PDT
- In force
- 44 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
Counties Mohave County, AZ, Clark County, NV
The radar
The Las Vegas radar (KESX), 31 km from the middle of the area, began a volume at 21:18 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, 9.3 hours before the alert went out and 89 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
- 2 J/kg
- Mixed-layer CIN
- -171 J/kg
- Mixed-layer LCL
- 1725 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
758 WUUS55 KVEF 112116 SVRVEF AZC015-NVC003-112200- /O.NEW.KVEF.SV.W.0057.120911T2116Z-120911T2200Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 216 PM PDT TUE SEP 11 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EXTREME WEST CENTRAL MOHAVE COUNTY IN NORTHWEST ARIZONA... CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 300 PM PDT/300 PM MST/. * AT 214 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR RAILROAD PASS...OR NEAR BOULDER CITY...AND WAS MOVING EAST AT 15 MPH. * LOCATIONS IMPACTED INCLUDE... BOULDER CITY AND HOOVER DAM. 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 3599 11449 3575 11456 3588 11503 3606 11498 TIME...MOT...LOC 2116Z 284DEG 15KT 3595 11490 $$ MORGAN
2 follow-up statements
388 WWUS55 KVEF 112133 SVSVEF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 233 PM MST TUE SEP 11 2012 AZC015-NVC003-112200- /O.CON.KVEF.SV.W.0057.000000T0000Z-120911T2200Z/ MOHAVE AZ-CLARK NV- 233 PM MST TUE SEP 11 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM MST/300 PM PDT/ FOR CENTRAL CLARK AND EXTREME WEST CENTRAL MOHAVE COUNTIES... AT 231 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED JUST EAST OF BOULDER CITY...AND WAS MOVING EAST AT 15 MPH. LOCATIONS IMPACTED INCLUDE... HOOVER DAM AND WILLOW BEACH. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM IS CAPABLE OF PRODUCING DAMAGING WINDS WHICH CAN BRING DOWN TREES AND POWER LINES AND CAUSE SIGNIFICANT BLOWING DUST AND DEBRIS. IN ADDITION...HAIL AND LIGHTNING ARE LIKELY. LIGHTNING CAN KILL! TAKE COVER IN A SUBSTANTIAL SHELTER AND STAY AWAY FROM WINDOWS UNTIL THE STORM PASSES. REPORT SEVERE WEATHER BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG...NWSVEGAS. && LAT...LON 3605 11487 3599 11449 3575 11456 3585 11492 TIME...MOT...LOC 2133Z 284DEG 15KT 3593 11482 $$ MORGAN
294 WWUS55 KVEF 112151 SVSVEF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 251 PM MST TUE SEP 11 2012 AZC015-NVC003-112200- /O.EXP.KVEF.SV.W.0057.000000T0000Z-120911T2200Z/ MOHAVE AZ-CLARK NV- 251 PM MST TUE SEP 11 2012 ...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CLARK AND EXTREME WEST CENTRAL MOHAVE COUNTIES WILL EXPIRE AT 300 PM MST/300 PM PDT/... AT 250 PM PDT...RADAR INDICATED THAT THE THUNDERSTORM SOUTHEAST OF BOULDER CITY HAD WEAKENED. THEREFORE...THE SEVERE THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE. PEOPLE IN WILLOW BEACH SHOULD BE PREPARED FOR WIND GUSTS OF 40 TO 50 MPH FROM THIS STORM. LAT...LON 3605 11487 3599 11449 3575 11456 3585 11492 TIME...MOT...LOC 2150Z 284DEG 15KT 3591 11474 $$ MORGAN
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 3:24 AM PDT | Flash Flood Warning | VEF | Clark | 111 min |
| Sep 11, 4:52 AM PDT | Flash Flood Warning | VEF | Nye | 113 min |
| Sep 11, 8:28 AM PDT | Areal Flood Advisory | VEF | Lincoln | 3 hr |
| Sep 11, 11:33 AM PDT | Areal Flood Advisory | VEF | Clark | 3 hr |
| Sep 11, 12:32 PM PDT | Flash Flood Warning | VEF | Clark | 88 min |
| Sep 11, 1:44 PM PDT | Areal Flood Advisory | VEF | Clark | 27 min |
| Sep 11, 1:51 PM PDT | Flash Flood Warning | VEF | Clark | 114 min |
| Sep 11, 2:08 PM PDT | Flash Flood Warning | VEF | Clark | 93 min |
| Sep 11, 2:18 PM PDT | Flash Flood Warning | VEF | Clark | 4 hr |
| Sep 11, 3:39 PM PDT | Flash Flood Warning | VEF | Clark | 2 hr |
| Sep 11, 4:02 PM PDT | Flash Flood Warning | VEF | Clark | 118 min |
| Sep 10, 5:35 PM PDT | Flash Flood Warning | VEF | Mohave | 115 min |
| Sep 11, 5:05 AM PDT | Flash Flood Warning | VEF | Mohave | 65 min |
Nearby
Severe Thunderstorm Warnings in Nevada, 2012Severe Thunderstorm Warnings in Arizona, 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.