Alert archive / California / Flash Flood Warnings in 2023
Flash Flood Warning 12, NWS Los Angeles, CA
NWS Los Angeles, CA issued this flash flood warning at Feb 24, 2023, 2:16 PM PST for Los Angeles County, California. It was in force for 14 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 24, 2023, 2:16 PM PST (22:16 UTC)
- Expired
- Feb 25, 2023, 4:45 AM PST
- In force
- 14 hr
- Issued by
- NWS Los Angeles, CA
- Area
- Storm-based polygon
- Damage threat
- Considerable
- 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 22:15 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
Vandenberg AFB, CA (KVBG), launched 12:00Z, 10.3 hours before the alert went out and 214 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
- 65 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 545 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km storm-relative helicity
- 326 m²/s²
- 0-3 km storm-relative helicity
- 365 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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 24, 1:54 PM PST, 22 minutes earlier.
Area forecast discussion, Feb 24, 1:54 PM PST, 22 minutes before
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Special weather statement, Feb 24, 9:47 AM PST, 4 hours 29 minutes before
Special Weather Statement
National Weather Service OXNARD CA
947 AM PST Fri Feb 24 2023
CAZ346-349-241830-
Santa Barbara County Central Coast Beaches CA-
Santa Barbara County Southwestern Coast CA-
947 AM PST Fri Feb 24 2023
...Strong thunderstorms will impact portions of western Santa Barbara
County through 1030 AM PST...
At 946 AM PST, Doppler radar was tracking strong thunderstorms
capable of producing a landspout along a line extending from 14 miles
west of Vandenberg Air Force Base to 27 miles west of Point
Conception. Movement was northeast at 35 mph.
HAZARD...Landspouts, wind gusts of 50 to 55 mph, and pea size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to outdoor objects is possible. Gusty winds
could knock down tree limbs and blow around unsecured
objects.
Locations impacted include...
Lompoc...
and Vandenberg Air Force Base.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 3458 12064 3460 12064 3470 12060 3471 12060
3476 12064 3477 12064 3480 12055 3465 12047
3453 12053 3456 12058 3455 12062 3458 12065
TIME...MOT...LOC 1746Z 233DEG 30KT 3470 12077 3439 12094
LANDSPOUT...POSSIBLE
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...55 MPH
Phillips/CohenSpecial weather statement, Feb 24, 9:55 AM PST, 4 hours 21 minutes before
Special Weather Statement
National Weather Service OXNARD CA
955 AM PST Fri Feb 24 2023
CAZ354-355-358-241815-
Ventura County Beaches CA-Central Ventura County Valleys CA-
Ventura County Inland Coast CA-
955 AM PST Fri Feb 24 2023
...A strong thunderstorm will impact portions of southwestern Ventura
County through 1015 AM PST...
At 955 AM PST, Doppler radar was tracking a strong thunderstorm over
southwestern Ventura, moving north at 35 mph.
HAZARD...Wind gusts of 50 to 55 mph and pea size hail. A brief weak
tornado cannot be ruled out with this activity.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Oxnard...
Ventura...
and Ventura Harbor.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3418 11924 3421 11926 3423 11927 3423 11926
3424 11927 3427 11928 3428 11929 3427 11931
3428 11932 3432 11932 3431 11916 3417 11923
TIME...MOT...LOC 1755Z 189DEG 30KT 3425 11927
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...55 MPH
Phillips/CohenSpecial weather statement, Feb 24, 10:04 AM PST, 4 hours 12 minutes before
Special Weather Statement
National Weather Service OXNARD CA
1004 AM PST Fri Feb 24 2023
CAZ346-347-241830-
Santa Barbara County Central Coast Beaches CA-
Santa Barbara County Inland Central Coast CA-
1004 AM PST Fri Feb 24 2023
...Strong thunderstorms will impact portions of northwestern Santa
Barbara County through 1030 AM PST...
At 1003 AM PST, Doppler radar was tracking strong thunderstorms along
a line extending from 13 miles northwest of Vandenberg Air Force
Base to 16 miles west of Lompoc. A brief weak tornado will
be possible with this activity. Movement was northeast at 30 mph.
HAZARD...Wind gusts of 50 to 55 mph. A brief weak tornado possible.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
These storms will remain over mainly rural areas of northwestern
Santa Barbara County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3494 12058 3480 12054 3477 12063 3482 12061
3486 12061 3487 12062 3488 12064 3490 12064
3490 12067 3491 12067
TIME...MOT...LOC 1803Z 234DEG 28KT 3483 12074 3471 12076
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH
CohenSpecial weather statement, Feb 24, 11:17 AM PST, 2 hours 59 minutes before
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Everything else NWS Los Angeles, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 24, 3:23 AM PST | Special Marine Warning | LOX | 37 min | |
| Feb 24, 3:46 AM PST | Special Weather Statement | LOX | Ventura | 44 min |
| Feb 24, 4:01 AM PST | Special Marine Warning | LOX | 119 min | |
| Feb 24, 4:46 AM PST | Areal Flood Advisory | LOX | Los Angeles, Ventura | 11 hr |
| Feb 24, 4:46 AM PST | Areal Flood Advisory | LOX | San Luis Obispo, Santa Barbara | 11 hr |
| Feb 24, 5:42 AM PST | Special Weather Statement | LOX | Santa Barbara | 18 min |
| Feb 24, 5:49 AM PST | Special Weather Statement | LOX | Santa Barbara | 26 min |
| Feb 24, 5:53 AM PST | Special Marine Warning | LOX | 2 hr | |
| Feb 24, 6:00 AM PST | Special Weather Statement | LOX | Santa Barbara | 15 min |
| Feb 24, 6:11 AM PST | Special Weather Statement | LOX | Santa Barbara | 34 min |
| Feb 24, 6:18 AM PST | Special Weather Statement | LOX | Santa Barbara | 12 min |
| Feb 24, 6:42 AM PST | Special Weather Statement | LOX | Santa Barbara | 33 min |
| Feb 24, 8:08 AM PST | Special Weather Statement | LOX | Santa Barbara | 22 min |
| Feb 24, 8:12 AM PST | Special Marine Warning | LOX | 2 hr | |
| Feb 24, 8:50 AM PST | Special Weather Statement | LOX | Santa Barbara | 25 min |
| Feb 24, 9:04 AM PST | Small Craft Advisory | LOX | 24 hr | |
| Feb 24, 9:09 AM PST | Special Marine Warning | LOX | 81 min | |
| Feb 24, 9:32 AM PST | Special Weather Statement | LOX | Ventura | 13 min |
| Feb 24, 9:47 AM PST | Special Weather Statement | LOX | Santa Barbara | 43 min |
| Feb 24, 9:55 AM PST | Special Weather Statement | LOX | Ventura | 20 min |
| Feb 24, 10:04 AM PST | Special Weather Statement | LOX | 26 min | |
| Feb 24, 10:07 AM PST | Tornado Warning | LOX | Santa Barbara | 23 min |
| Feb 24, 11:14 AM PST | Special Marine Warning | LOX | 16 min | |
| Feb 24, 11:17 AM PST | Special Weather Statement | LOX | 28 min | |
| Feb 24, 11:59 AM PST | Special Weather Statement | LOX | Santa Barbara | 16 min |
| Feb 24, 12:15 PM PST | Special Weather Statement | LOX | Santa Barbara | 30 min |
| Feb 24, 2:16 PM PST | Flash Flood Warning | LOX | Santa Barbara, Ventura | 8 hr |
Nearby
Flash Flood Warnings in California, 2023Every flash flood warning in 2023
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.