Alert archive / California / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 7, NWS Eureka, CA

July 25, 2025Trinity County, California

NWS Eureka, CA issued this severe thunderstorm warning at Jul 25, 2025, 5:35 PM PDT for Trinity County, California. It was in force for 20 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, 5:35 PM PDT (00:35 UTC)
Expired
Jul 25, 2025, 5:55 PM PDT
In force
20 min
Issued by
NWS Eureka, CA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Trinity County, CA

The radar

The Eureka (Bunker Hill) radar (KBHX), 132 km from the middle of the area, began a volume at 00:37 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 00:00Z, 0.6 hours before the alert went out and 184 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 00:00Z on 2025-07-26Temperature 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 00:00Z on 2025-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 square meters per square second.1939Sfc1 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
3542 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
-20 m²/s²
0-3 km storm-relative helicity
-64 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

273 
WUUS56 KEKA 260035
SVREKA
CAC105-260115-
/O.NEW.KEKA.SV.W.0007.250726T0035Z-250726T0115Z/

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

The National Weather Service in Eureka has issued a

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

* Until 615 PM PDT.

* At 535 PM PDT, a severe thunderstorm was located 9 miles east of 
  Weaverville, moving northwest at 5 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind
           damage to roofs, siding, and trees.

* Locations impacted include...
  Weaverville, Douglas City and Lewiston.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4067 12274 4055 12286 4067 12299 4085 12289
      4081 12266 4079 12266 4077 12267 4075 12272
      4074 12272 4073 12271 4071 12271 4071 12272
      4070 12272 4069 12274 4070 12274 4069 12275
TIME...MOT...LOC 0035Z 139DEG 6KT 4075 12278

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MH
1 follow-up statement
578 
WWUS56 KEKA 260055
SVSEKA

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

CAC105-260105-
/O.CAN.KEKA.SV.W.0007.000000T0000Z-250726T0115Z/
Trinity CA-
555 PM PDT Fri Jul 25 2025

...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR EAST CENTRAL TRINITY 
COUNTY...

The storm which prompted the warning has weakened below severe 
limits, and no longer poses an immediate threat to life or property. 
Therefore, the warning has been cancelled. However, gusty winds are 
still possible with this thunderstorm.

&&

LAT...LON 4067 12274 4055 12286 4067 12299 4085 12289
      4081 12266 4079 12266 4077 12267 4075 12272
      4074 12272 4073 12271 4071 12271 4071 12272
      4070 12272 4069 12274 4070 12274 4069 12275
TIME...MOT...LOC 0035Z 139DEG 6KT 4075 12278

$$

 MH

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 25, 5:12 PM PDTAreal Flood AdvisoryEKATrinity50 min
Jul 25, 5:20 PM PDTSevere Thunderstorm WarningEKATrinity40 min

Nearby

Severe Thunderstorm Warnings in California, 2025Every 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.