Alert archive / California / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 13, NWS Hanford, CA

September 10, 2012Kern County, California

NWS Hanford, CA issued this severe thunderstorm warning at Sep 10, 2012, 4:25 PM PDT for Kern County, California. It was in force for 35 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Sep 10, 2012, 4:25 PM PDT (23:25 UTC)
Expired: Sep 10, 2012, 5:00 PM PDT
In force: 35 min
Issued by: NWS Hanford, CA
Area: Storm-based polygon

County Kern County, CA

What was reported inside it

Time	Report	Where	Remark
Sep 10, 4:59 PM PDT	TSTM WND GST 58	Edwards Afb, CA	AT RUNWAY 222 LAKE BED WIND SENSOR

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Edwards AFB, CA (KEDW), launched 12:00Z, 11.4 hours before the alert went out and 8 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2666 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 75 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

840 
WUUS56 KHNX 102325
SVRHNX
CAC029-110000-
/O.NEW.KHNX.SV.W.0013.120910T2325Z-120911T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY CA
425 PM PDT MON SEP 10 2012

THE NATIONAL WEATHER SERVICE IN HANFORD CA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN KERN COUNTY IN CENTRAL CALIFORNIA...

* UNTIL 500 PM PDT

* AT 418 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THIS STORM WAS LOCATED 17
  MILES SOUTH OF CALIFORNIA CITY...OR 47 MILES SOUTH OF RIDGECREST...
  AND MOVING NORTH AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BORON...EDWARDS...CALIFORNIA CITY THROUGH 500 PM PDT...
  HIGHWAY 58 FROM THE SAN BERNARDINO COUNTY LINE TO NORTH EDWARDS

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

&&

LAT...LON 3482 11764 3483 11795 3491 11793 3519 11783
      3525 11763
TIME...MOT...LOC 2323Z 182DEG 21KT 3498 11771

$$

DUDLEY

1 follow-up statement

120 
WWUS56 KHNX 102349
SVSHNX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY CA
449 PM PDT MON SEP 10 2012

CAC029-110000-
/O.CON.KHNX.SV.W.0013.000000T0000Z-120911T0000Z/
KERN CA-
449 PM PDT MON SEP 10 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM PDT
FOR SOUTHEASTERN KERN COUNTY...

AT 444 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE
HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THIS STORM WAS
LOCATED NEAR BORON...OR 37 MILES SOUTH OF RIDGECREST...MOVING NORTH 
AT 25 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
HIGHWAY 58 BETWEEN THE SAN BERNARDION COUNTY LINE AND NORTH 
EDWARDS...BORON 500 PM PDT...

LAT...LON 3482 11764 3483 11795 3491 11793 3519 11783
      3525 11763
TIME...MOT...LOC 2348Z 182DEG 21KT 3513 11770

$$

DUDLEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 10, 2:34 PM PDT	Special Weather Statement	HNX	Kern	56 min
Sep 10, 3:49 PM PDT	Special Weather Statement	HNX		41 min

Nearby

Severe Thunderstorm Warnings in California, 2012 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.