Alert archive / California / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 2, NWS Eureka, CA

July 22, 2014Trinity County, California

NWS Eureka, CA issued this severe thunderstorm warning at Jul 22, 2014, 4:35 PM PDT for Trinity 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
Jul 22, 2014, 4:35 PM PDT (23:35 UTC)
Expired
Jul 22, 2014, 5:00 PM PDT
In force
25 min
Issued by
NWS Eureka, CA
Area
Storm-based polygon

County Trinity County, CA

The radar

The Eureka (Bunker Hill) radar (KBHX), 122 km from the middle of the area, began a volume at 23:35 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, 11.6 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, Medford/Jackson, OR at 12:00Z on 2014-07-22Temperature 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, Medford/Jackson, OR at 12:00Z on 2014-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 square meters per square second.193958Sfc1 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
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.

242 
WUUS56 KEKA 222335
SVREKA
CAC105-230000-
/O.NEW.KEKA.SV.W.0002.140722T2335Z-140723T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EUREKA CA
435 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 500 PM PDT

* AT 432 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 OVER   
  EAST CENTRAL TRINITY COUNTY...OR 9 MILES NORTH OF YOLLA BOLLY      
  DISTRICT RS...AND MOVING NORTH AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL
  AREAS OF THE INDICATED COUNTY.

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 4055 12275 4054 12278 4052 12279 4050 12280
      4050 12283 4044 12290 4044 12292 4042 12295
      4041 12301 4063 12298 4064 12272
TIME...MOT...LOC 2335Z 186DEG 21KT 4050 12290

$$

RPA
2 follow-up statements
192 
WWUS56 KEKA 222346
SVSEKA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EUREKA CA
446 PM PDT TUE JUL 22 2014

CAC105-230000-
/O.CON.KEKA.SV.W.0002.000000T0000Z-140723T0000Z/
TRINITY CA-
446 PM PDT TUE JUL 22 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM PDT
FOR CENTRAL TRINITY COUNTY...

AT 445 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE 
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS 
LOCATED OVER CENTRAL TRINITY COUNTY...OR 12 MILES SOUTH OF 
WEAVERVILLE...MOVING NORTH AT 25 MPH.

THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS
OF THE INDICATED COUNTY.

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 4055 12275 4054 12278 4052 12279 4050 12280
      4050 12283 4044 12290 4044 12292 4042 12295
      4041 12301 4063 12298 4064 12272
TIME...MOT...LOC 2346Z 186DEG 21KT 4056 12289

$$

RPA
795 
WWUS56 KEKA 230003
SVSEKA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EUREKA CA
503 PM PDT TUE JUL 22 2014

CAC105-230013-
/O.EXP.KEKA.SV.W.0002.000000T0000Z-140723T0000Z/
TRINITY CA-
503 PM PDT TUE JUL 22 2014

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL TRINITY COUNTY 
HAS EXPIRED...

LAT...LON 4055 12275 4054 12278 4052 12279 4050 12280
      4050 12283 4044 12290 4044 12292 4042 12295
      4041 12301 4063 12298 4064 12272
TIME...MOT...LOC 2346Z 186DEG 21KT 4056 12289

$$

RPA

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 22, 3:46 PM PDTSpecial Weather StatementEKATrinity44 min
Jul 22, 3:54 PM PDTRed Flag WarningEKA4 hr
Jul 22, 3:54 PM PDTSevere Thunderstorm WarningEKATrinity36 min
Jul 22, 4:29 PM PDTSpecial Weather StatementEKATrinity31 min
Jul 22, 4:56 PM PDTSpecial Weather StatementEKATrinity34 min
Jul 22, 4:58 PM PDTSevere Thunderstorm WarningEKAHumboldt, Trinity32 min

Nearby

Severe Thunderstorm Warnings in California, 2014Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.