Alert archive / California / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 60, NWS Las Vegas, NV
NWS Las Vegas, NV issued this severe thunderstorm warning at Sep 11, 2012, 8:36 PM PDT for San Bernardino County, California. It was in force for 39 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, 8:36 PM PDT (03:36 UTC)
- Expired
- Sep 11, 2012, 9:15 PM PDT
- In force
- 39 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
County San Bernardino County, CA
The nearest sounding before it
Las Vegas, NV (KVEF), launched 00:00Z, 3.6 hours before the alert went out and 199 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
- 352 J/kg
- Mixed-layer CIN
- -73 J/kg
- Mixed-layer LCL
- 827 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- -59 m²/s²
- 0-3 km storm-relative helicity
- 0 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
004 WUUS55 KVEF 120336 SVRVEF CAC071-120415- /O.NEW.KVEF.SV.W.0060.120912T0336Z-120912T0415Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 836 PM PDT TUE SEP 11 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... * UNTIL 915 PM PDT. * AT 833 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM. THIS STORM WAS LOCATED NEAR LUDLOW...AND WAS MOVING SOUTH AT 20 MPH. * LOCATIONS IMPACTED INCLUDE...LUDLOW..AND INTERSTATE 40 BETWEEN MILE MARKERS 45 AND 60. THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 48 AND 61. 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 3453 11586 3450 11612 3476 11624 3484 11601 TIME...MOT...LOC 0335Z 340DEG 17KT 3472 11607 $$ KENNEDY
2 follow-up statements
294 WWUS55 KVEF 120359 SVSVEF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 859 PM PDT TUE SEP 11 2012 CAC071-120415- /O.CON.KVEF.SV.W.0060.000000T0000Z-120912T0415Z/ SAN BERNARDINO CA- 859 PM PDT TUE SEP 11 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM PDT FOR CENTRAL SAN BERNARDINO COUNTY... AT 854 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM. THIS STORM WAS LOCATED 10 MILES SOUTHEAST OF LUDLOW...AND WAS MOVING SOUTH AT 20 MPH. LOCATIONS IMPACTED INCLUDE...LUDLOW..AND INTERSTATE 40 BETWEEN MILE MARKERS 45 AND 60...AND SOUTH ALONG NATIONAL TRAILS HIGHWAY TOWARDS AMBOY. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM IS CAPABLE OF PRODUCING DAMAGING WINDS WHICH CAN BRING DOWN TREES AND POWER LINES AND CAUSE SIGNIFICANT BLOWING DUST AND DEBRIS. IN ADDITION...HAIL AND LIGHTNING ARE LIKELY. LIGHTNING CAN KILL! TAKE COVER IN A SUBSTANTIAL SHELTER AND STAY AWAY FROM WINDOWS UNTIL THE STORM PASSES. REPORT SEVERE WEATHER BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG...NWSVEGAS. && LAT...LON 3453 11586 3450 11612 3476 11624 3484 11601 TIME...MOT...LOC 0357Z 340DEG 17KT 3462 11603 $$ KENNEDY
971 WWUS55 KVEF 120414 SVSVEF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 914 PM PDT TUE SEP 11 2012 CAC071-120421- /O.EXP.KVEF.SV.W.0060.000000T0000Z-120912T0415Z/ SAN BERNARDINO CA- 914 PM PDT TUE SEP 11 2012 ...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL SAN BERNARDINO COUNTY WILL EXPIRE AT 915 PM PDT... AT 910PM PDT...RADAR IMAGERY CONTINUED TO INDICATE A LARGE AND STRONG THUNDERSTORM SOUTH OF LUDLOW CONTINUING TO MOVE SOUTH AT 20MPH...HOWEVER..THIS STORM IS NO LONGER SEVERE. MOTORISTS ALONG NATIONAL TRAILS HIGHWAY AND INTERSTATE 40 NEAR LUDLOW SHOULD USE EXTRA CAUTION THROUGH 945PM AS STRONG OUTFLOW WINDS UP TO 45 MPH MAY BE STILL BE POSSIBLE. LAT...LON 3453 11586 3450 11612 3476 11624 3484 11601 TIME...MOT...LOC 0411Z 340DEG 17KT 3456 11600 $$ KENNEDY
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 5:25 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 35 min |
| Sep 11, 5:43 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Sep 11, 5:54 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 19 min |
| Sep 11, 6:41 PM PDT | Flash Flood Warning | VEF | Inyo | 2 hr |
| Sep 11, 7:54 PM PDT | Flash Flood Warning | VEF | Inyo | 71 min |
| Sep 11, 9:59 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 76 min |
| Sep 11, 11:02 PM PDT | Flash Flood Warning | VEF | San Bernardino | 118 min |
Nearby
Severe Thunderstorm Warnings in California, 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.