Alert archive / California / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 62, NWS Las Vegas, NV
NWS Las Vegas, NV issued this severe thunderstorm warning at Oct 11, 2012, 1:51 PM PDT for San Bernardino County, California; Clark County, Nevada. It was in force for 24 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, 1:51 PM PDT (20:51 UTC)
- Expired
- Oct 11, 2012, 2:15 PM PDT
- In force
- 24 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
Counties San Bernardino County, CA, Clark County, NV
The radar
The Las Vegas radar (KESX), 53 km from the middle of the area, began a volume at 20:52 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, 8.9 hours before the alert went out and 95 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.
436 WUUS55 KVEF 112051 SVRVEF CAC071-NVC003-112115- /O.NEW.KVEF.SV.W.0062.121011T2051Z-121011T2115Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 151 PM PDT THU OCT 11 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTH CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... SOUTH CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 215 PM PDT. * AT 148 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 NIPTON...OR 17 MILES NORTHEAST OF CIMA...AND WAS MOVING NORTHWEST AT 30 MPH. * LOCATIONS IMPACTED INCLUDE... NIPTON AND PRIMM. THIS INCLUDES INTERSTATE 15 IN CALIFORNIA BETWEEN MILE MARKERS 174 AND 186. THIS INCLUDES INTERSTATE 15 IN NEVADA BETWEEN MILE MARKERS 1 AND 5. 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 3559 11564 3573 11542 3541 11515 3531 11533 TIME...MOT...LOC 2051Z 142DEG 26KT 3541 11528 $$ MORGAN
1 follow-up statement
942 WWUS55 KVEF 112109 SVSVEF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 209 PM PDT THU OCT 11 2012 CAC071-NVC003-112118- /O.EXP.KVEF.SV.W.0062.000000T0000Z-121011T2115Z/ SAN BERNARDINO CA-CLARK NV- 209 PM PDT THU OCT 11 2012 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL CLARK AND NORTH CENTRAL SAN BERNARDINO COUNTIES WILL EXPIRE AT 215 PM PDT... AT 208 PM PDT...RADAR SHOWED THAT THE THUNDERSTORM JUST NORTH OF NIPTON HAD BEGUN TO WEAKEN. NO REPORTS OF LARGE HAIL OR HIGH WINDS HAD BEEN RECEIVED...SO THE SEVERE THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE. LAT...LON 3559 11564 3573 11542 3541 11515 3531 11533 TIME...MOT...LOC 2108Z 142DEG 26KT 3551 11537 $$ MORGAN
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 11, 8:39 AM PDT | Flash Flood Warning | VEF | San Bernardino | 111 min |
| Oct 11, 11:48 AM PDT | Areal Flood Advisory | VEF | San Bernardino | 2 hr |
| Oct 11, 4:18 PM PDT | Severe Thunderstorm Warning | VEF | Inyo, San Bernardino | 27 min |
| 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, 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.