Alert archive / California / Flash Flood Warnings in 2025

Flash Flood Warning 1, NWS Eureka, CA

July 1, 2025Trinity County, California

NWS Eureka, CA issued this flash flood warning at Jul 1, 2025, 5:37 PM PDT for Trinity County, California. It was in force for 3 hr. 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 1, 2025, 5:37 PM PDT (00:37 UTC)
Expired: Jul 1, 2025, 8:30 PM PDT
In force: 3 hr
Issued by: NWS Eureka, CA
Area: Storm-based polygon
Flood severity: None

County Trinity County, CA

The radar

The Eureka (Bunker Hill) radar (KBHX), 127 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-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: 927 J/kg
Mixed-layer CIN: -131 J/kg
Mixed-layer LCL: 2749 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: -9 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

893 
WGUS56 KEKA 020037
FFWEKA
CAC105-020330-
/O.NEW.KEKA.FF.W.0001.250702T0037Z-250702T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Eureka CA
537 PM PDT Tue Jul 1 2025

The National Weather Service in Eureka has issued a

* Flash Flood Warning for...
  Central Trinity County in northwestern California...

* Until 830 PM PDT.

* At 537 PM PDT, trained weather spotters reported thunderstorms 
  producing very heavy rain across the warned area. Flash flooding 
  is ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Trained spotters reported.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Weaverville and Lewiston.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 4066 12279 4067 12301 4083 12289 4083 12279
      4069 12274 4069 12275 4068 12274

FLASH FLOOD...OBSERVED

$$

JJW

1 follow-up statement

703 
WGUS76 KEKA 020323
FFSEKA

Flash Flood Statement
National Weather Service Eureka CA
823 PM PDT Tue Jul 1 2025

CAC105-020333-
/O.EXP.KEKA.FF.W.0001.000000T0000Z-250702T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Trinity CA-
823 PM PDT Tue Jul 1 2025

...FLASH FLOOD WARNING WILL EXPIRE AT 830 PM PDT THIS EVENING FOR 
CENTRAL TRINITY COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

&&

LAT...LON 4066 12279 4067 12301 4083 12289 4083 12279
      4069 12274 4069 12275 4068 12274

$$

JJW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 5:01 PM PDT	Severe Thunderstorm Warning	EKA	Trinity	44 min
Jul 1, 5:14 PM PDT	Special Weather Statement	EKA	Trinity	31 min
Jul 1, 5:44 PM PDT	Special Weather Statement	EKA	Trinity	31 min
Jul 1, 5:48 PM PDT	Special Weather Statement	EKA	Trinity	27 min
Jul 1, 5:53 PM PDT	Special Weather Statement	EKA	Trinity	22 min
Jul 1, 6:10 PM PDT	Special Weather Statement	EKA	Trinity	35 min
Jul 1, 6:44 PM PDT	Special Weather Statement	EKA	Trinity	31 min
Jul 1, 7:13 PM PDT	Special Weather Statement	EKA	Trinity	32 min
Jul 1, 7:21 PM PDT	Flash Flood Warning	EKA	Trinity	3 hr
Jul 1, 7:43 PM PDT	Special Weather Statement	EKA	Trinity	32 min
Jul 1, 7:55 PM PDT	Special Weather Statement	EKA	Siskiyou	35 min
Jul 1, 8:29 PM PDT	Special Weather Statement	EKA	Siskiyou	31 min
Jul 1, 8:42 PM PDT	Flash Flood Warning	EKA	Trinity	3 hr

Nearby

Flash Flood Warnings in California, 2025 Every flash flood 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.