Alert archive / California / Flash Flood Warnings in 2026

Flash Flood Warning 1, NWS Eureka, CA

January 3, 2026Humboldt County, California

NWS Eureka, CA issued this flash flood warning at Jan 3, 2026, 12:24 PM PST for Humboldt County, California. It was in force for 4 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jan 3, 2026, 12:24 PM PST (20:24 UTC)
Expired
Jan 3, 2026, 4:30 PM PST
In force
4 hr
Issued by
NWS Eureka, CA
Area
Storm-based polygon
Flood severity
None

County Humboldt County, CA

The radar

The Eureka (Bunker Hill) radar (KBHX), 17 km from the middle of the area, began a volume at 20:26 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.

What was reported inside it

TimeReportWhereRemark
Jan 3, 12:36 PM PSTFLASH FLOOD1 Wnw Petrolia, CAWashed out road at Mattole and Clarke Road.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Oakland, CA (KOAK), launched 12:00Z, 8.4 hours before the alert went out and 344 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, Oakland, CA at 12:00Z on 2026-01-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 22 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Oakland, CA at 12:00Z on 2026-01-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 116 square meters per square second.1939587897117Sfc1 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
22 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
803 m above ground
0-6 km bulk shear
70 kt
0-1 km storm-relative helicity
116 m²/s²
0-3 km storm-relative helicity
170 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

188 
WGUS56 KEKA 032024
FFWEKA
CAC023-040030-
/O.NEW.KEKA.FF.W.0001.260103T2024Z-260104T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Eureka CA
1224 PM PST Sat Jan 3 2026

The National Weather Service in Eureka has issued a

* Flash Flood Warning for...
  Southwestern Humboldt County in northwestern California...

* Until 430 PM PST.

* At 1224 PM PST, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Between 1 and 3.5 inches of rain
  have fallen. The expected rainfall rate is 1 to 2 inches in 2
  minutes. Additional rainfall amounts of 1 to 2 inches 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...
  Honeydew, Rio Dell, Petrolia, Scotia, Pepperwood, Bull Creek,
  Capetown and Shively.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4056 12436 4050 12392 4012 12414 4013 12419
      4016 12422 4020 12429 4024 12433 4025 12435
      4026 12436 4028 12436 4032 12435 4034 12436
      4038 12437 4040 12438 4041 12439 4043 12440
      4044 12441 4049 12438 4051 12439

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 2 MINUTES

$$

JJW
2 follow-up statements
516 
WGUS76 KEKA 032027
FFSEKA

Flash Flood Statement
National Weather Service Eureka CA
1227 PM PST Sat Jan 3 2026

CAC023-040030-
/O.CON.KEKA.FF.W.0001.000000T0000Z-260104T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Humboldt CA-
1227 PM PST Sat Jan 3 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 PM PST THIS
AFTERNOON FOR SOUTHWESTERN HUMBOLDT COUNTY...

At 1227 PM PST, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1 and 3.5 inches of rain have
fallen. Additional rainfall amounts of 1 to 2 inches 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...
  Honeydew, Rio Dell, Petrolia, Scotia, Pepperwood, Bull Creek,
  Capetown and Shively.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4056 12436 4050 12392 4012 12414 4013 12419
      4016 12422 4020 12429 4024 12433 4025 12435
      4026 12436 4028 12436 4032 12435 4034 12436
      4038 12437 4040 12438 4041 12439 4043 12440
      4044 12441 4049 12438 4051 12439

FLASH FLOOD...RADAR INDICATED

$$

JJW
034 
WGUS76 KEKA 040027
FFSEKA

Flash Flood Statement
National Weather Service Eureka CA
427 PM PST Sat Jan 3 2026

CAC023-040037-
/O.EXP.KEKA.FF.W.0001.000000T0000Z-260104T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Humboldt CA-
427 PM PST Sat Jan 3 2026

...FLASH FLOOD WARNING WILL EXPIRE AT 430 PM PST THIS AFTERNOON FOR
SOUTHWESTERN HUMBOLDT COUNTY...

The heavy rain has ended, but moderate rain continues. Please
continue to heed remaining road closures.

A Flood Watch remains in effect until 1000 PM PST Sunday for a
portion of northwest California.

&&

LAT...LON 4056 12436 4050 12392 4012 12414 4013 12419
      4016 12422 4020 12429 4024 12433 4025 12435
      4026 12436 4028 12436 4032 12435 4034 12436
      4038 12437 4040 12438 4041 12439 4043 12440
      4044 12441 4049 12438 4051 12439

$$

MKK

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 2, 10:46 PM PSTStorm WarningEKA24 hr
Jan 2, 11:45 PM PSTWinter Storm WarningEKA64 hr
Jan 3, 5:28 AM PSTSpecial Weather StatementEKAHumboldt32 min
Jan 3, 5:56 AM PSTSpecial Weather StatementEKAHumboldt34 min
Jan 3, 6:06 AM PSTSpecial Marine WarningEKA39 min
Jan 3, 6:52 AM PSTSpecial Marine WarningEKA53 min
Jan 3, 7:45 AM PSTSpecial Marine WarningEKA60 min
Jan 3, 8:52 AM PSTSpecial Marine WarningEKA23 min
Jan 3, 9:29 AM PSTSpecial Marine WarningEKA16 min
Jan 3, 9:33 AM PSTSpecial Marine WarningEKA42 min
Jan 3, 10:07 AM PSTSpecial Marine WarningEKA38 min
Jan 3, 10:11 AM PSTSpecial Marine WarningEKA34 min
Jan 3, 10:16 AM PSTSpecial Marine WarningEKA44 min
Jan 3, 10:40 AM PSTSevere Thunderstorm Warning Considerable damage threatEKAHumboldt35 min
Jan 3, 11:01 AM PSTSpecial Weather StatementEKAHumboldt29 min
Jan 3, 11:03 AM PSTSpecial Marine WarningEKA27 min
Jan 3, 11:05 AM PSTSpecial Marine WarningEKA25 min
Jan 3, 11:10 AM PSTSevere Thunderstorm Warning Considerable damage threatEKAHumboldt35 min
Jan 3, 11:18 AM PSTTornado WarningEKAHumboldt12 min
Jan 3, 11:25 AM PSTSpecial Weather StatementEKAHumboldt35 min
Jan 3, 11:27 AM PSTSpecial Weather StatementEKAMendocino33 min
Jan 3, 11:30 AM PSTAreal Flood AdvisoryEKAHumboldt31 hr
Jan 3, 11:52 AM PSTAreal Flood AdvisoryEKAMendocino4 hr
Jan 3, 11:59 AM PSTSpecial Weather StatementEKATrinity61 min
Jan 3, 12:01 PM PSTAreal Flood AdvisoryEKAHumboldt4 hr
Jan 3, 12:32 PM PSTSpecial Marine WarningEKA13 min
Jan 3, 12:36 PM PSTSpecial Weather StatementEKA24 min
Jan 3, 12:55 PM PSTSpecial Marine WarningEKA35 min
Jan 3, 12:56 PM PSTSpecial Weather StatementEKAMendocino34 min
Jan 3, 1:28 PM PSTSpecial Weather StatementEKAMendocino32 min
Jan 3, 3:35 PM PSTSpecial Marine WarningEKA11 min

Nearby

Flash Flood Warnings in California, 2026Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.