Alert archive / Nevada / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 70, NWS Las Vegas, NV
NWS Las Vegas, NV issued this severe thunderstorm warning at Oct 11, 2012, 8:57 PM PDT for Clark County, Nevada. It was in force for 48 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Oct 11, 2012, 8:57 PM PDT (03:57 UTC)
- Expired
- Oct 11, 2012, 9:45 PM PDT
- In force
- 48 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
County Clark County, NV
The radar
The Las Vegas radar (KESX), 70 km from the middle of the area, began a volume at 03:59 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Oct 11, 9:05 PM PDT | HAIL 0.88 | 5 Nnw Las Vegas, NV |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Las Vegas, NV (KVEF), launched 00:00Z, 4.0 hours before the alert went out and 44 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
- 305 J/kg
- Mixed-layer CIN
- -43 J/kg
- Mixed-layer LCL
- 1141 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 56 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.3
The text
As transmitted, in the capitals the NWS used until 2016.
215 WUUS55 KVEF 120357 SVRVEF NVC003-120445- /O.NEW.KVEF.SV.W.0070.121012T0357Z-121012T0445Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 857 PM PDT THU OCT 11 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 945 PM PDT. * AT 854 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A CLUSTER OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL. THESE STORMS WERE LOCATED NEAR NELLIS AFB...AND WERE MOVING NORTHEAST AT 25 MPH. THIS WARNING REPLACES THE PREVIOUS SEVERE THUNDERSTORM WARNING FOR THE LAS VEGAS VALLEY. THESE STORMS HAVE A HISTORY OF PRODUCING NICKEL TO QUARTER SIZE HAIL. * LOCATIONS IMPACTED INCLUDE... NELLIS AFB AND NELLIS AIR FORCE BASE. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM IS CAPABLE OF PRODUCING LARGE HAIL THAT CAN CAUSE INJURY AND DAMAGE PROPERTY. IN ADDITION...STRONG WINDS AND LIGHTNING ARE LIKELY. LIGHTNING CAN KILL! TAKE SHELTER IN A STURDY BUILDING. IF IT IS SAFE TO DO SO...TAKE APPROPRIATE ACTIONS TO PROTECT VEHICLES AND PROPERTY. 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 3646 11515 3633 11480 3610 11496 3621 11522 TIME...MOT...LOC 0357Z 208DEG 21KT 3622 11503 $$ KENNEDY
2 follow-up statements
120 WWUS55 KVEF 120420 SVSVEF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 920 PM PDT THU OCT 11 2012 NVC003-120445- /O.CON.KVEF.SV.W.0070.000000T0000Z-121012T0445Z/ CLARK NV- 920 PM PDT THU OCT 11 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM PDT FOR CENTRAL CLARK COUNTY... AT 913 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A CLUSTER OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL. IN ADDITION TO LARGE HAIL...THESE STORMS ARE PRODUCING RAINFALL RATES OF TWO TO THREE INCHES PER HOUR...AND FLASH FLOODING IS ALSO LIKELY OCCURRING. A SEPARATE FLASH FLOOD WARNING IS ALSO IN EFFECT FOR THE WARNED AREA.THESE STORMS WERE LOCATED OVER NORTHEAST LAS VEGAS NEAR NELLIS AFB AND NORTH OF CRAIG ROAD...AND WERE MOVING NORTHEAST AT 25 MPH. LOCATIONS IMPACTED INCLUDE...NELLIS AIR FORCE BASE...AND PORTIONS NORTHEAST LAS VEGAS NORTH OF CRAIG ROAD. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM IS CAPABLE OF PRODUCING LARGE HAIL THAT CAN CAUSE INJURY AND DAMAGE PROPERTY. IN ADDITION...STRONG WINDS AND LIGHTNING ARE LIKELY. LIGHTNING CAN KILL! TAKE SHELTER IN A STURDY BUILDING. IF IT IS SAFE TO DO SO...TAKE APPROPRIATE ACTIONS TO PROTECT VEHICLES AND PROPERTY. REPORT SEVERE WEATHER BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG...NWSVEGAS. && LAT...LON 3621 11491 3625 11521 3646 11515 3633 11480 TIME...MOT...LOC 0415Z 208DEG 21KT 3631 11497 $$ KENNEDY
420 WWUS55 KVEF 120442 SVSVEF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 942 PM PDT THU OCT 11 2012 NVC003-120451- /O.EXP.KVEF.SV.W.0070.000000T0000Z-121012T0445Z/ CLARK NV- 942 PM PDT THU OCT 11 2012 ...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CLARK COUNTY WILL EXPIRE AT 945 PM PDT... THIS THUNDERSTORM IS STILL SEVERE BUT HAS MOVED OUT OF THE ORIGINAL WARNING AREA. A NEW WARNING HAS BEEN ISSUED TO EXPAND THE AREA IMPACTED BY THIS STORM. THE STORM HAS MOVED NORTH OF THE LAS VEGAS VALLEY AND THE MAIN LOCATION IMPACTED NOW IS COYOTE SPRINGS. PLEASE SEE THE LATEST SEVERE THUNDERSTORM WARNING FOR DETAILS. LAT...LON 3621 11491 3625 11521 3646 11515 3633 11480 TIME...MOT...LOC 0441Z 208DEG 21KT 3644 11488 $$ KENNEDY
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 11, 5:25 PM PDT | Severe Thunderstorm Warning | VEF | Clark, Nye | 35 min |
| Oct 11, 5:52 PM PDT | Severe Thunderstorm Warning | VEF | Nye | 53 min |
| Oct 11, 6:45 PM PDT | Flash Flood Warning | VEF | Clark | 2 hr |
| Oct 11, 7:56 PM PDT | Flash Flood Warning | VEF | Clark | 80 min |
| Oct 11, 8:12 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 48 min |
| Oct 11, 8:21 PM PDT | Flash Flood Warning | VEF | Clark | 114 min |
| Oct 11, 9:07 PM PDT | Flash Flood Warning | VEF | Clark | 113 min |
| Oct 11, 9:40 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 27 min |
| Oct 11, 10:15 PM PDT | Flash Flood Warning | VEF | Clark | 2 hr |
| Oct 11, 10:42 PM PDT | Flash Flood Warning | VEF | Clark | 94 min |
| Oct 12, 12:03 AM PDT | Flash Flood Warning | VEF | Nye | 87 min |
| Oct 12, 12:28 AM PDT | Severe Thunderstorm Warning | VEF | Lincoln | 32 min |
| Oct 12, 1:43 PM PDT | Flash Flood Warning | VEF | Clark | 2 hr |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.