Alert archive / California / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 13, NWS San Diego, CA

July 1, 2016San Bernardino County, California

NWS San Diego, CA issued this severe thunderstorm warning at Jul 1, 2016, 5:09 PM PDT for San Bernardino County, California. It was in force for 51 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
Jul 1, 2016, 5:09 PM PDT (00:09 UTC)
Expired
Jul 1, 2016, 6:00 PM PDT
In force
51 min
Issued by
NWS San Diego, CA
Area
Storm-based polygon

County San Bernardino County, CA

The radar

The Edwards AFB radar (KEYX), 55 km from the middle of the area, began a volume at 00:09 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

San Diego, CA (KNKX), launched 00:00Z, 0.2 hours before the alert went out and 207 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.

Skew-T log-pSkew-T log-p diagram, San Diego, CA at 00:00Z on 2016-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, San Diego, CA at 00:00Z on 2016-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1387 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
-34 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

268 
WUUS56 KSGX 020009
SVRSGX
CAC071-020100-
/O.NEW.KSGX.SV.W.0013.160702T0009Z-160702T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
509 PM PDT FRI JUL 1 2016

THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA...

* UNTIL 600 PM PDT

* AT 507 PM PDT...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 I-15 BETWEEN VICTORVILLE AND
  BARSTOW...AND NEARLY STATIONARY.

* LOCATIONS IMPACTED INCLUDE...
  VICTORVILLE...I-15 BETWEEN VICTORVILLE AND BARSTOW...
  APPLE VALLEY...ADELANTO...EL MIRAGE...
  HWY 247 BETWEEN LUCERNE VALLEY AND BARSTOW...HELENDALE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE
HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR
PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 3477 11692 3446 11734 3447 11757 3466 11755
      3481 11744
TIME...MOT...LOC 0007Z 240DEG 49KT 3474 11727 

$$

ALBRIGHT
2 follow-up statements
136 
WWUS56 KSGX 020040
SVSSGX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
540 PM PDT FRI JUL 1 2016

CAC071-020100-
/O.CON.KSGX.SV.W.0013.000000T0000Z-160702T0100Z/
SAN BERNARDINO CA-
540 PM PDT FRI JUL 1 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM PDT
FOR SAN BERNARDINO COUNTY...

AT 534 PM PDT...DOPPLER RADAR CONTINUED TO INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
MPH. THIS STORM WAS LOCATED NEAR HELENDALE...MOVING NORTHEAST AT 15
MPH TOWARD INTERSTATE 15.

LOCATIONS IMPACTED INCLUDE...
I-15 BETWEEN VICTORVILLE AND BARSTOW...
HWY 247 BETWEEN LUCERNE VALLEY AND BARSTOW...AND HELENDALE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE
HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION
MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR
BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS
WHERE WATER COVERS THE ROAD.

&&

LAT...LON 3477 11692 3446 11734 3447 11757 3466 11755
      3481 11744
TIME...MOT...LOC 0034Z 240DEG 49KT 3493 11687 

$$

ALBRIGHT
882 
WWUS56 KSGX 020101
SVSSGX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
601 PM PDT FRI JUL 1 2016

CAC071-020107-
/O.EXP.KSGX.SV.W.0013.000000T0000Z-160702T0100Z/
SAN BERNARDINO CA-
601 PM PDT FRI JUL 1 2016

...THE SEVERE THUNDERSTORM WARNING FOR SAN BERNARDINO COUNTY WILL
EXPIRE AT 600 PM PDT...
    
THE THREAT FOR SEVERE WINDS IN EXCESS OF 60 MPH AND LARGE HAIL
GREATER THAN 1 INCH HAS DIMINISHED OVER THE WARNED AREA...THEREFORE
THE SEVERE THUNDERSTORM WARNING WILL EXPIRE AT 600 PM. THE TREAT FOR
FLASH FLOODING WILL REMAIN FOR THE NEXT COUPLE HOURS.

LAT...LON 3477 11692 3446 11734 3447 11757 3466 11755
      3481 11744
TIME...MOT...LOC 0048Z 240DEG 49KT 3493 11687 

$$

ALBRIGHT

The office that day

Everything else NWS San Diego, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 1, 5:11 PM PDTFlash Flood WarningSGXSan Bernardino3 hr

Nearby

Severe Thunderstorm Warnings in California, 2016Every severe thunderstorm warning in 2016

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.