Alert archive / California / Flash Flood Warnings in 2025

Flash Flood Warning 30, NWS Los Angeles, CA

November 15, 2025Los Angeles County, California

NWS Los Angeles, CA issued this flash flood warning at Nov 15, 2025, 8:37 AM PST for Los Angeles County, California. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Nov 15, 2025, 8:37 AM PST (16:37 UTC)
Expired
Nov 15, 2025, 1:52 PM PST
In force
5 hr
Issued by
NWS Los Angeles, CA
Area
Storm-based polygon
Flood severity
None

County Los Angeles County, CA

The radar

The Santa Ana Mts radar (KSOX), 71 km from the middle of the area, began a volume at 16:37 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

San Diego, CA (KNKX), launched 12:00Z, 4.6 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-pSkew-T log-p diagram, San Diego, CA at 12:00Z on 2025-11-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, San Diego, CA at 12:00Z on 2025-11-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 140 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1166 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
140 m²/s²
0-3 km storm-relative helicity
210 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 14, 5:17 PM PSTBeach Hazards StatementLOXSanta Barbara21 hr
Nov 14, 5:27 PM PSTAreal Flood AdvisoryLOXLos Angeles4 hr
Nov 14, 6:30 PM PSTAreal Flood AdvisoryLOXLos Angeles19 hr
Nov 14, 8:15 PM PSTAreal Flood AdvisoryLOXLos Angeles18 hr
Nov 15, 12:52 AM PSTAreal Flood AdvisoryLOXSanta Barbara, Ventura13 hr
Nov 15, 3:48 AM PSTFlash Flood Warning Considerable damage threatLOXSanta Barbara117 min
Nov 15, 4:07 AM PSTAreal Flood AdvisoryLOXSanta Barbara3 hr
Nov 15, 4:23 AM PSTSpecial Marine WarningLOX82 min
Nov 15, 4:39 AM PSTAreal Flood AdvisoryLOXLos Angeles6 hr
Nov 15, 4:41 AM PSTAreal Flood AdvisoryLOXLos Angeles9 hr
Nov 15, 5:02 AM PSTAreal Flood AdvisoryLOXLos Angeles, Ventura9 hr
Nov 15, 5:23 AM PSTSpecial Marine WarningLOX37 min
Nov 15, 5:32 AM PSTFlash Flood WarningLOXLos Angeles8 hr
Nov 15, 5:32 AM PSTFlash Flood WarningLOXVentura6 hr
Nov 15, 5:36 AM PSTFlash Flood Warning Considerable damage threatLOXLos Angeles8 hr
Nov 15, 5:42 AM PSTSpecial Marine WarningLOX18 min
Nov 15, 5:44 AM PSTSpecial Weather StatementLOXLos Angeles46 min
Nov 15, 6:43 AM PSTSpecial Weather StatementLOXVentura47 min
Nov 15, 8:07 AM PSTAreal Flood AdvisoryLOXSanta Barbara6 hr
Nov 15, 8:56 AM PSTAreal Flood AdvisoryLOXSan Luis Obispo, Santa Barbara5 hr
Nov 15, 9:39 AM PSTFlash Flood Warning Considerable damage threatLOXLos Angeles4 hr
Nov 15, 9:49 AM PSTFlash Flood WarningLOXLos Angeles4 hr
Nov 15, 10:03 AM PSTAreal Flood AdvisoryLOXLos Angeles, Ventura4 hr
Nov 15, 10:39 AM PSTSpecial Weather StatementLOXLos Angeles36 min
Nov 15, 11:49 AM PSTAreal Flood AdvisoryLOXLos Angeles2 hr
Nov 15, 11:53 AM PSTAreal Flood AdvisoryLOXLos Angeles117 min

Nearby

Flash Flood Warnings in California, 2025Every 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.