Alert archive / California / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 1, NWS Eureka, CA

July 22, 2014Trinity County, California

NWS Eureka, CA issued this severe thunderstorm warning at Jul 22, 2014, 3:54 PM PDT for Trinity County, California. It was in force for 36 min. 5 reports 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: Jul 22, 2014, 3:54 PM PDT (22:54 UTC)
Expired: Jul 22, 2014, 4:30 PM PDT
In force: 36 min
Issued by: NWS Eureka, CA
Area: Storm-based polygon

County Trinity County, CA

The radar

The Eureka (Bunker Hill) radar (KBHX), 100 km from the middle of the area, began a volume at 22:55 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.

What was reported inside it

Time	Report	Where	Remark
Jul 22, 3:55 PM PDT	TSTM WND GST 60	2 Ene Big Bar, CA	STEELHEAD COTTAGES REPORTED 8-10 DIAMETER LIMBS DOWNED FROM SEVERE WINDS. TSTM WND GST DURATION 30 MINUTES.
Jul 22, 3:55 PM PDT	HAIL 0.5	2 Ene Big Bar, CA	STEELHEAD COTTAGES. LIMBS, TREES, AND POWER LINES DOWNED AND 0.31 OF RAIN IN 30 MINUTES. HAIL DURATION 30 MINUTES.
Jul 22, 4:00 PM PDT	TSTM WND DMG	1 Ese Helena, CA	LIMBS DOWNED, LOOSE 2X4 BLOWN OFF OF PORCH, AND MARBLE SIZED HAIL. TRINITY ADVENTURE PARK. TSTM WND DMG DURATION 30 MINUTES.
Jul 22, 4:00 PM PDT	HAIL 0.75	2 N Junction City, CA	DIME TO PENNY SIZE HAIL MIXED IN WITH HEAVY RAIN.
Jul 22, 4:15 PM PDT	HAIL 0.88	2 Ese Helena, CA	TRINITY CANYON LODGE REPORTED GREEN GRAPE SIZED HAIL. ALSO HEAVY RAIN AND LOTS OF LEAVES/PINE NEEDLES DOWN. HAIL DURATION 20 MINUTES.

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

The nearest sounding before it

Medford/Jackson, OR (KMFR), launched 12:00Z, 10.9 hours before the alert went out and 181 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: 2115 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 213 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.

091 
WUUS56 KEKA 222254
SVREKA
CAC105-222330-
/O.NEW.KEKA.SV.W.0001.140722T2254Z-140722T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EUREKA CA
ISSUED BY NATIONAL WEATHER SERVICE MEDFORD OR
354 PM PDT TUE JUL 22 2014

THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL TRINITY COUNTY IN NORTHWEST CALIFORNIA...

* UNTIL 430 PM PDT

* AT 352 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES
  SOUTHWEST OF JUNCTION CITY...OR 12 MILES SOUTHWEST OF
  WEAVERVILLE...AND MOVING NORTH AT 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  HELENA...AND AREAS ALONG HIGHWAY 299 BETWEEN BIG BAR AND JUNCTION  
  CITY.

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.

&&

LAT...LON 4085 12326 4085 12297 4064 12309 4065 12320
TIME...MOT...LOC 2253Z 182DEG 18KT 4066 12311

$$

BTL

1 follow-up statement

324 
WWUS56 KEKA 222323
SVSEKA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EUREKA CA
ISSUED BY NATIONAL WEATHER SERVICE MEDFORD OR
423 PM PDT TUE JUL 22 2014

CAC105-222333-
/O.EXP.KEKA.SV.W.0001.000000T0000Z-140722T2330Z/
TRINITY CA-
423 PM PDT TUE JUL 22 2014

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL TRINITY COUNTY WILL
EXPIRE AT 430 PM PDT...

LAT...LON 4085 12326 4085 12297 4064 12309 4065 12320
TIME...MOT...LOC 2323Z 182DEG 18KT 4081 12310

$$

BTL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 3:46 PM PDT	Special Weather Statement	EKA	Trinity	44 min
Jul 22, 3:54 PM PDT	Red Flag Warning	EKA		4 hr
Jul 22, 4:29 PM PDT	Special Weather Statement	EKA	Trinity	31 min
Jul 22, 4:35 PM PDT	Severe Thunderstorm Warning	EKA	Trinity	25 min
Jul 22, 4:56 PM PDT	Special Weather Statement	EKA	Trinity	34 min
Jul 22, 4:58 PM PDT	Severe Thunderstorm Warning	EKA	Humboldt, Trinity	32 min

Nearby

Severe Thunderstorm Warnings in California, 2014 Every severe thunderstorm warning in 2014

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; radar from the NEXRAD Level II archive.