Alert archive / California / Flash Flood Warnings in 2026

Flash Flood Warning 2, NWS Eureka, CA

May 22, 2026Trinity County, California

NWS Eureka, CA issued this flash flood warning at May 22, 2026, 6:52 PM PDT for Trinity County, California. It was in force for 2 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: May 22, 2026, 6:52 PM PDT (01:52 UTC)
Expired: May 22, 2026, 9:14 PM PDT
In force: 2 hr
Issued by: NWS Eureka, CA
Area: Storm-based polygon
Flood severity: None

County Trinity County, CA

The radar

The Medford radar (KMAX), 117 km from the middle of the area, began a volume at 01:53 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, 1.9 hours before the alert went out and 148 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: 3178 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 2 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

662 
WGUS56 KEKA 230152
FFWEKA
CAC105-230445-
/O.NEW.KEKA.FF.W.0002.260523T0152Z-260523T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Eureka CA
652 PM PDT Fri May 22 2026

The National Weather Service in Eureka has issued a

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

* Until 945 PM PDT.

* At 652 PM PDT, Doppler radar indicated thunderstorms producing
  heavy rain 17 miles north of Weaverville. Between 0.5 and 1 inch of
  rain has fallen. Additional rainfall amounts of 0.5 to 1 inch are
  possible in the warned area. Flash flooding is ongoing or expected
  to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  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...
  Mainly rural areas of North Central Trinity County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

Move away from recently burned areas. Life-threatening flooding of
creeks, roads and normally dry arroyos is likely. The heavy rains
will likely trigger rockslides, mudslides and debris flows in steep
terrain, especially in and around these areas.

Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.

&&

LAT...LON 4114 12283 4087 12283 4087 12318 4108 12318
      4108 12312 4106 12310 4105 12306 4103 12305
      4100 12304 4101 12298 4101 12295 4099 12294
      4099 12292 4103 12290 4107 12292 4107 12294
      4108 12297 4111 12297 4112 12296 4114 12296

FLASH FLOOD...RADAR INDICATED

$$

DS

1 follow-up statement

923 
WGUS76 KEKA 230414
FFSEKA

Flash Flood Statement
National Weather Service Eureka CA
914 PM PDT Fri May 22 2026

CAC105-230424-
/O.CAN.KEKA.FF.W.0002.000000T0000Z-260523T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Trinity CA-
914 PM PDT Fri May 22 2026

...FLASH FLOOD WARNING IS CANCELLED FOR NORTH CENTRAL TRINITY
COUNTY...

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

&&

LAT...LON 4087 12283 4087 12318 4108 12318 4108 12312
      4106 12310 4105 12306 4100 12304 4101 12296
      4099 12294 4099 12292 4103 12290 4107 12292
      4107 12294 4108 12297 4111 12297 4112 12296
      4114 12296 4114 12283

$$

DS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 9:02 AM PDT	Small Craft Advisory	EKA		24 hr
May 23, 4:04 PM PDT	Special Weather Statement	EKA		26 min

Nearby

Flash Flood Warnings in California, 2026 Every flash flood warning in 2026

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.