Alert archive / California / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 13, NWS Eureka, CA

June 3, 2009Humboldt County, California

NWS Eureka, CA issued this severe thunderstorm warning at Jun 3, 2009, 4:20 PM PDT for Humboldt County, California. It was in force for 25 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: Jun 3, 2009, 4:20 PM PDT (23:20 UTC)
Expired: Jun 3, 2009, 4:45 PM PDT
In force: 25 min
Issued by: NWS Eureka, CA
Area: Storm-based polygon

County Humboldt County, CA

The radar

The Eureka (Bunker Hill) radar (KBHX), 75 km from the middle of the area, began a volume at 23:21 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

Medford/Jackson, OR (KMFR), launched 12:00Z, 11.3 hours before the alert went out and 172 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 873 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 26 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.

000 
WUUS56 KEKA 032320
SVREKA
CAC023-032345-
/O.NEW.KEKA.SV.W.0013.090603T2320Z-090603T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EUREKA CA
420 PM PDT WED JUN 3 2009

THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL HUMBOLDT COUNTY IN NORTHWEST CALIFORNIA...
  THIS INCLUDES THE CITIES OF...WILLOW CREEK...HOOPA...

* UNTIL 445 PM PDT

* AT 419 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO
  GOLF BALL SIZE.  THIS STORM WAS LOCATED NEAR WILLOW CREEK...AND
  MOVING NORTH AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  WILLOW CREEK BY 435 PM PDT...
  HOOPA BY 445 PM PDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

HAIL UP TO ONE AND THREE QUARTERS INCHES IN DIAMETER HAS BEEN 
REPORTED NEAR HYAMPOM WITH THIS STORM. IF YOU ARE IN THE PATH OF THE 
STORM...TAKE IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY.

&&

LAT...LON 4111 12383 4115 12355 4093 12353 4092 12361
      4091 12359 4088 12359 4086 12357 4084 12357
      4082 12370
TIME...MOT...LOC 2320Z 165DEG 20KT 4087 12359

$$

BC

1 follow-up statement

000 
WWUS56 KEKA 032330
SVSEKA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EUREKA CA
430 PM PDT WED JUN 3 2009

CAC023-032345-
/O.CON.KEKA.SV.W.0013.000000T0000Z-090603T2345Z/
HUMBOLDT CA-
430 PM PDT WED JUN 3 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM PDT
FOR EAST CENTRAL HUMBOLDT COUNTY...

AT 427 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING
HAIL UP TO GOLF BALL SIZE.  THIS STORM WAS LOCATED NEAR WILLOW
CREEK...MOVING NORTH AT 25 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  WILLOW CREEK BY 435 PM PDT...
  HOOPA BY 445 PM PDT...

LAT...LON 4115 12355 4093 12353 4092 12361 4091 12359
      4088 12359 4086 12357 4084 12357 4082 12370
      4111 12383
TIME...MOT...LOC 2329Z 165DEG 20KT 4092 12361

$$

BC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 2, 6:15 PM PDT	Special Weather Statement	EKA	Mendocino	45 min
Jun 2, 6:32 PM PDT	Severe Thunderstorm Warning	EKA	Mendocino	28 min
Jun 2, 7:15 PM PDT	Special Weather Statement	EKA	Siskiyou	45 min
Jun 3, 2:43 PM PDT	Areal Flood Advisory	EKA	Mendocino	3 hr
Jun 3, 2:47 PM PDT	Special Weather Statement	EKA	Trinity	43 min
Jun 3, 3:04 PM PDT	Special Weather Statement	EKA		56 min
Jun 3, 3:21 PM PDT	Severe Thunderstorm Warning	EKA	Humboldt, Trinity	24 min
Jun 3, 3:28 PM PDT	Severe Thunderstorm Warning	EKA	Mendocino, Trinity	32 min
Jun 3, 3:44 PM PDT	Severe Thunderstorm Warning	EKA	Humboldt, Trinity	46 min
Jun 3, 3:51 PM PDT	Special Weather Statement	EKA	Humboldt	39 min
Jun 3, 4:00 PM PDT	Severe Thunderstorm Warning	EKA	Mendocino	18 min
Jun 3, 4:05 PM PDT	Severe Thunderstorm Warning	EKA	Trinity	25 min
Jun 3, 4:26 PM PDT	Special Weather Statement	EKA	Humboldt	19 min
Jun 3, 4:36 PM PDT	Special Weather Statement	EKA	Mendocino	24 min
Jun 3, 4:42 PM PDT	Special Weather Statement	EKA	Mendocino	33 min
Jun 3, 4:47 PM PDT	Severe Thunderstorm Warning	EKA	Humboldt, Trinity	13 min

Nearby

Severe Thunderstorm Warnings in California, 2009 Every severe thunderstorm warning in 2009

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.