Alert archive / California / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 39, NWS Las Vegas, NV
NWS Las Vegas, NV issued this severe thunderstorm warning at Aug 2, 2018, 3:07 PM PDT for San Bernardino County, California. It was in force for 38 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
- Aug 2, 2018, 3:07 PM PDT (22:07 UTC)
- Expired
- Aug 2, 2018, 3:45 PM PDT
- In force
- 38 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County San Bernardino County, CA
The radar
The Las Vegas radar (KESX), 120 km from the middle of the area, began a volume at 22:09 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, 10.1 hours before the alert went out and 197 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
- 54 J/kg
- Mixed-layer CIN
- -173 J/kg
- Mixed-layer LCL
- 3279 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- -53 m²/s²
- 0-3 km storm-relative helicity
- -58 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
486
WUUS55 KVEF 022207
SVRVEF
CAC071-022245-
/O.NEW.KVEF.SV.W.0039.180802T2207Z-180802T2245Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Las Vegas NV
307 PM PDT THU AUG 2 2018
The National Weather Service in Las Vegas has issued a
* Severe Thunderstorm Warning for...
East central San Bernardino County in southern California...
* Until 345 PM PDT.
* At 304 PM PDT, a severe thunderstorm was located 8 miles southeast
of Essex, or 30 miles southeast of Mitchell Caverns, moving north
at 30 mph. This includes Interstate 40 between milemarker 99 and
123.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Strong, southerly cross winds. Expect damage to roofs and
trees.
* Locations impacted include...
Essex.
This includes Interstate 40 in California between mile markers 99 and
123.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3447 11506 3451 11530 3484 11536 3490 11491
TIME...MOT...LOC 2204Z 191DEG 53KT 3462 11516
HAIL...<.75IN
WIND...60MPH
$$
JS1 follow-up statement
507
WWUS55 KVEF 022247
SVSVEF
Severe Weather Statement
National Weather Service Las Vegas NV
347 PM PDT THU AUG 2 2018
CAC071-022256-
/O.EXP.KVEF.SV.W.0039.000000T0000Z-180802T2245Z/
San Bernardino CA-
347 PM PDT THU AUG 2 2018
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL SAN BERNARDINO
COUNTY HAS EXPIRED...
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning has been allowed to expire.
LAT...LON 3447 11506 3451 11530 3484 11536 3490 11491
TIME...MOT...LOC 2246Z 191DEG 53KT 3521 11502
$$
JSThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 2:58 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 47 min |
| Aug 2, 3:29 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 26 min |
| Aug 2, 3:42 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
Nearby
Severe Thunderstorm Warnings in California, 2018Every severe thunderstorm warning in 2018
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.