Alert archive / California / Flash Flood Warnings in 2026
Flash Flood Warning 1, NWS Eureka, CA
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
| Time | Report | Where | Remark |
|---|---|---|---|
| Jan 3, 12:36 PM PST | FLASH FLOOD | 1 Wnw Petrolia, CA | Washed 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.
- 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
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
$$
JJW2 follow-up statements
516
WGUS76 KEKA 032027
FFSEKA
Flash Flood Statement
National Weather Service Eureka CA
1227 PM PST Sat Jan 3 2026
CAC023-040030-
/O.CON.KEKA.FF.W.0001.000000T0000Z-260104T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Humboldt CA-
1227 PM PST Sat Jan 3 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 PM PST THIS
AFTERNOON FOR SOUTHWESTERN HUMBOLDT COUNTY...
At 1227 PM PST, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1 and 3.5 inches of rain have
fallen. Additional rainfall amounts of 1 to 2 inches are possible in
the warned area. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar indicated.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Honeydew, Rio Dell, Petrolia, Scotia, Pepperwood, Bull Creek,
Capetown and Shively.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4056 12436 4050 12392 4012 12414 4013 12419
4016 12422 4020 12429 4024 12433 4025 12435
4026 12436 4028 12436 4032 12435 4034 12436
4038 12437 4040 12438 4041 12439 4043 12440
4044 12441 4049 12438 4051 12439
FLASH FLOOD...RADAR INDICATED
$$
JJW034
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
$$
MKKThe office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 2, 10:46 PM PST | Storm Warning | EKA | 24 hr | |
| Jan 2, 11:45 PM PST | Winter Storm Warning | EKA | 64 hr | |
| Jan 3, 5:28 AM PST | Special Weather Statement | EKA | Humboldt | 32 min |
| Jan 3, 5:56 AM PST | Special Weather Statement | EKA | Humboldt | 34 min |
| Jan 3, 6:06 AM PST | Special Marine Warning | EKA | 39 min | |
| Jan 3, 6:52 AM PST | Special Marine Warning | EKA | 53 min | |
| Jan 3, 7:45 AM PST | Special Marine Warning | EKA | 60 min | |
| Jan 3, 8:52 AM PST | Special Marine Warning | EKA | 23 min | |
| Jan 3, 9:29 AM PST | Special Marine Warning | EKA | 16 min | |
| Jan 3, 9:33 AM PST | Special Marine Warning | EKA | 42 min | |
| Jan 3, 10:07 AM PST | Special Marine Warning | EKA | 38 min | |
| Jan 3, 10:11 AM PST | Special Marine Warning | EKA | 34 min | |
| Jan 3, 10:16 AM PST | Special Marine Warning | EKA | 44 min | |
| Jan 3, 10:40 AM PST | Severe Thunderstorm Warning | EKA | Humboldt | 35 min |
| Jan 3, 11:01 AM PST | Special Weather Statement | EKA | Humboldt | 29 min |
| Jan 3, 11:03 AM PST | Special Marine Warning | EKA | 27 min | |
| Jan 3, 11:05 AM PST | Special Marine Warning | EKA | 25 min | |
| Jan 3, 11:10 AM PST | Severe Thunderstorm Warning | EKA | Humboldt | 35 min |
| Jan 3, 11:18 AM PST | Tornado Warning | EKA | Humboldt | 12 min |
| Jan 3, 11:25 AM PST | Special Weather Statement | EKA | Humboldt | 35 min |
| Jan 3, 11:27 AM PST | Special Weather Statement | EKA | Mendocino | 33 min |
| Jan 3, 11:30 AM PST | Areal Flood Advisory | EKA | Humboldt | 31 hr |
| Jan 3, 11:52 AM PST | Areal Flood Advisory | EKA | Mendocino | 4 hr |
| Jan 3, 11:59 AM PST | Special Weather Statement | EKA | Trinity | 61 min |
| Jan 3, 12:01 PM PST | Areal Flood Advisory | EKA | Humboldt | 4 hr |
| Jan 3, 12:32 PM PST | Special Marine Warning | EKA | 13 min | |
| Jan 3, 12:36 PM PST | Special Weather Statement | EKA | 24 min | |
| Jan 3, 12:55 PM PST | Special Marine Warning | EKA | 35 min | |
| Jan 3, 12:56 PM PST | Special Weather Statement | EKA | Mendocino | 34 min |
| Jan 3, 1:28 PM PST | Special Weather Statement | EKA | Mendocino | 32 min |
| Jan 3, 3:35 PM PST | Special Marine Warning | EKA | 11 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.