Alert archive / California / Areal Flood Advisories in 2025
Areal Flood Advisory 21, NWS Eureka, CA
NWS Eureka, CA issued this areal flood advisory at Nov 4, 2025, 8:37 AM PST for Humboldt County, California. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Nov 4, 2025, 8:37 AM PST (16:37 UTC)
- Expired
- Nov 4, 2025, 11:30 AM PST
- In force
- 3 hr
- Issued by
- NWS Eureka, CA
- Area
- Storm-based polygon
County Humboldt County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 39 km from the middle of the area, began a volume at 16:40 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
Oakland, CA (KOAK), launched 12:00Z, 4.6 hours before the alert went out and 362 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 737 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Eureka, CA wrote its last area forecast discussion before this areal flood advisory went out at Nov 3, 3:45 PM PST, 16 hours 52 minutes earlier.
Area forecast discussion, Nov 3, 3:45 PM PST, 16 hours 52 minutes before
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</html>The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 4, 11:26 AM PST | Areal Flood Advisory | EKA | Humboldt | 3 hr |
Nearby
Areal Flood Advisories in California, 2025Every areal flood advisory 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.