Alert archive / California / Flash Flood Warnings in 2024
Flash Flood Warning 9, NWS Los Angeles, CA
NWS Los Angeles, CA issued this flash flood warning at Feb 5, 2024, 1:08 PM PST for Los Angeles County, Ventura County, California. It was in force for 8 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
- Feb 5, 2024, 1:08 PM PST (21:08 UTC)
- Expired
- Feb 5, 2024, 9:00 PM PST
- In force
- 8 hr
- Issued by
- NWS Los Angeles, CA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Los Angeles County, CA, Ventura County, CA
The radar
The Los Angeles radar (KVTX), 47 km from the middle of the area, began a volume at 21:13 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, 9.1 hours before the alert went out and 215 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
- 1067 m above ground
- 0-6 km bulk shear
- 72 kt
- 0-1 km storm-relative helicity
- 259 m²/s²
- 0-3 km storm-relative helicity
- 304 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Los Angeles, CA wrote its last area forecast discussion before this flash flood warning went out at Feb 5, 9:28 AM PST, 3 hours 40 minutes earlier.
Area forecast discussion, Feb 5, 9:28 AM PST, 3 hours 40 minutes before
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</html>The office that day
Everything else NWS Los Angeles, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 4, 4:42 PM PST | Areal Flood Advisory | LOX | Los Angeles, Ventura | 7 hr |
| Feb 4, 4:51 PM PST | Flash Flood Warning | LOX | Los Angeles | 7 hr |
| Feb 4, 5:02 PM PST | Areal Flood Advisory | LOX | San Luis Obispo | 7 hr |
| Feb 4, 5:50 PM PST | Small Craft Advisory | LOX | 19 hr | |
| Feb 4, 6:16 PM PST | Wind Advisory | LOX | Los Angeles, Ventura | 4 hr |
| Feb 4, 10:42 PM PST | Areal Flood Advisory | LOX | San Luis Obispo, Santa Barbara | 5 hr |
| Feb 4, 11:38 PM PST | Flash Flood Warning | LOX | Los Angeles | 9 hr |
| Feb 4, 11:41 PM PST | Areal Flood Advisory | LOX | Ventura | 9 hr |
| Feb 4, 11:56 PM PST | Areal Flood Advisory | LOX | Los Angeles | 9 hr |
| Feb 5, 1:13 AM PST | Flash Flood Warning | LOX | Los Angeles, Ventura | 8 hr |
| Feb 5, 9:40 AM PST | Flash Flood Warning | LOX | Los Angeles, Ventura | 11 hr |
| Feb 5, 10:13 AM PST | Areal Flood Advisory | LOX | Los Angeles, Ventura | 39 hr |
| Feb 5, 2:46 PM PST | Winter Weather Advisory | LOX | Los Angeles, Santa Barbara, Ventura | 65 hr |
Nearby
Flash Flood Warnings in California, 2024Every flash flood warning in 2024
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.