Alert archive / California / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 3, NWS Eureka, CA

July 25, 2025Trinity County, California

NWS Eureka, CA issued this severe thunderstorm warning at Jul 25, 2025, 2:37 PM PDT for Trinity County, California. It was in force for 38 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 25, 2025, 2:37 PM PDT (21:37 UTC)
Expired: Jul 25, 2025, 3:15 PM PDT
In force: 38 min
Issued by: NWS Eureka, CA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Trinity County, CA

The radar

The Eureka (Bunker Hill) radar (KBHX), 120 km from the middle of the area, began a volume at 21:38 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

Oakland, CA (KOAK), launched 12:00Z, 9.6 hours before the alert went out and 272 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: 618 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 46 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

237 
WUUS56 KEKA 252137
SVREKA
CAC105-252215-
/O.NEW.KEKA.SV.W.0003.250725T2137Z-250725T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Eureka CA
237 PM PDT Fri Jul 25 2025

The National Weather Service in Eureka has issued a

* Severe Thunderstorm Warning for...
  South Central Trinity County in northwestern California...

* Until 315 PM PDT.

* At 237 PM PDT, a severe thunderstorm was located 24 miles 
  northeast of Covelo. This storm was nearly stationary.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Mainly rural areas of South Central Trinity County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Seek shelter inside a well-built structure and stay away from 
windows. This storm is capable of producing large hail.

&&

LAT...LON 4001 12299 4009 12311 4021 12299 4021 12298
      4019 12297 4017 12298 4015 12299 4014 12297
      4013 12297 4012 12297 4010 12296 4009 12296
      4009 12297 4008 12297 4006 12295 4005 12295
      4004 12295 4003 12295 4002 12296
TIME...MOT...LOC 2137Z 204DEG 1KT 4007 12297

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

EYS

1 follow-up statement

111 
WWUS56 KEKA 252144
SVSEKA

Severe Weather Statement
National Weather Service Eureka CA
244 PM PDT Fri Jul 25 2025

CAC105-252215-
/O.CON.KEKA.SV.W.0003.000000T0000Z-250725T2215Z/
Trinity CA-
244 PM PDT Fri Jul 25 2025

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM PDT 
FOR SOUTH CENTRAL TRINITY COUNTY...

At 244 PM PDT, a severe thunderstorm was located 24 miles northeast 
of Covelo. This storm was nearly stationary.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
  Mainly rural areas of South Central Trinity County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Seek shelter inside a well-built structure and stay away from 
windows. This storm is capable of producing large hail.

&&

LAT...LON 4001 12299 4009 12311 4021 12299 4021 12298
      4019 12297 4017 12298 4015 12299 4014 12297
      4013 12297 4012 12297 4010 12296 4009 12296
      4009 12297 4008 12297 4006 12295 4005 12295
      4004 12295 4003 12295 4002 12296
TIME...MOT...LOC 2137Z 204DEG 1KT 4007 12297

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

EYS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 2:20 PM PDT	Special Weather Statement	EKA		25 min
Jul 25, 2:49 PM PDT	Special Weather Statement	EKA	Trinity	26 min
Jul 25, 3:05 PM PDT	Severe Thunderstorm Warning	EKA	Trinity	40 min
Jul 25, 3:28 PM PDT	Special Weather Statement	EKA	Trinity	32 min
Jul 25, 3:29 PM PDT	Flash Flood Warning	EKA	Trinity	78 min
Jul 25, 3:45 PM PDT	Special Weather Statement	EKA	Trinity	30 min
Jul 25, 3:58 PM PDT	Severe Thunderstorm Warning	EKA	Trinity	47 min
Jul 25, 4:27 PM PDT	Special Weather Statement	EKA	Trinity	33 min
Jul 25, 4:45 PM PDT	Special Weather Statement	EKA	Trinity	30 min
Jul 25, 4:55 PM PDT	Special Weather Statement	EKA	Trinity	35 min

Nearby

Severe Thunderstorm Warnings in California, 2025 Every severe thunderstorm warning in 2025

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.