Alert archive / California / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 64, NWS Las Vegas, NV
NWS Las Vegas, NV issued this severe thunderstorm warning at Oct 11, 2012, 4:18 PM PDT for Clark County, Nevada; Inyo County, San Bernardino County, California. It was in force for 27 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, 4:18 PM PDT (23:18 UTC)
- Expired
- Oct 11, 2012, 4:45 PM PDT
- In force
- 27 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
Counties Inyo County, CA, San Bernardino County, CA, Clark County, NV
The radar
The Las Vegas radar (KESX), 67 km from the middle of the area, began a volume at 23:18 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, 11.3 hours before the alert went out and 61 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.
963 WUUS55 KVEF 112318 SVRVEF CAC027-071-NVC003-112345- /O.NEW.KVEF.SV.W.0064.121011T2318Z-121011T2345Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 418 PM PDT THU OCT 11 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EXTREME SOUTHEASTERN INYO COUNTY IN EASTERN CALIFORNIA... EXTREME NORTH CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... WEST CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 445 PM PDT. * AT 413 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 11 MILES SOUTHEAST OF SANDY VALLEY...OR 7 MILES NORTHWEST OF PRIMM... AND WAS MOVING NORTHWEST AT 30 MPH. * LOCATIONS IMPACTED INCLUDE... SANDY VALLEY. 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 3593 11582 3604 11558 3567 11535 3558 11554 TIME...MOT...LOC 2318Z 150DEG 25KT 3571 11551 $$ MORGAN
1 follow-up statement
028 WWUS55 KVEF 112339 SVSVEF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 439 PM PDT THU OCT 11 2012 CAC027-071-NVC003-112348- /O.EXP.KVEF.SV.W.0064.000000T0000Z-121011T2345Z/ SAN BERNARDINO CA-INYO CA-CLARK NV- 439 PM PDT THU OCT 11 2012 ...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL CLARK - EXTREME SOUTHEASTERN INYO AND EXTREME NORTH CENTRAL SAN BERNARDINO COUNTIES WILL EXPIRE AT 445 PM PDT... AT 437 PM PDT...RADAR SHOWED THAT THE THUNDERSTORM OVER SANDY VALLEY HAD WEAKENED SLIGHTLY. A SPOTTER IN SANDY VALLEY REPORTED ONLY PEA SIZE HAIL AT 435 PM...SO THE SEVERE THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE. LAT...LON 3593 11582 3604 11558 3567 11535 3558 11554 TIME...MOT...LOC 2338Z 150DEG 25KT 3583 11560 $$ MORGAN
The 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, 2:53 PM PDT | Flash Flood Warning | VEF | Clark | 39 min |
| Oct 11, 4:53 PM PDT | Flash Flood Warning | VEF | Clark | 112 min |
Nearby
Severe Thunderstorm Warnings in California, 2012Severe 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.