Alert archive / California / Flash Flood Warnings in 2025

Flash Flood Warning 14, NWS Los Angeles, CA

May 1, 2025Los Angeles County, California

NWS Los Angeles, CA issued this flash flood warning at May 1, 2025, 6:09 PM PDT for Los Angeles County, California. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 1, 2025, 6:09 PM PDT (01:09 UTC)
Expired: May 1, 2025, 7:00 PM PDT
In force: 51 min
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 01:08 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 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 May 1, 2:18 PM PDT, 3 hours 51 minutes earlier.

Area forecast discussion, May 1, 2:18 PM PDT, 3 hours 51 minutes before

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In the hours before

Special weather statement, May 1, 12:42 PM PDT, 5 hours 27 minutes before

Special Weather Statement
National Weather Service OXNARD CA
1242 PM PDT Thu May 1 2025

CAZ038-352-353-356-376-377-012045-
Santa Barbara County Interior Mountains CA-Lake Casitas CA-
Santa Ynez Mountains Eastern Range CA-
Northern Ventura County Mountains CA-
Southern Ventura County Mountains CA-Cuyama Valley CA-
1242 PM PDT Thu May 1 2025

...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN VENTURA AND NORTH
CENTRAL SANTA BARBARA COUNTIES THROUGH 145 PM PDT...

At 1240 PM PDT, Doppler radar was tracking a strong thunderstorm 8
miles northwest of Rose Valley, or 11 miles north of Ojai. This storm
was nearly stationary.

HAZARD...Wind gusts up to 50 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Reyes Peak...
Old Man Mountain...
Big Pine Mountain...
Highway 33...
Ventucopa...
and Rose Valley.

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.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3488 11938 3488 11928 3486 11927 3486 11925
      3481 11924 3481 11905 3457 11895 3445 11932
      3454 11970 3467 11991 3476 11956 3490 11944
      3490 11938
TIME...MOT...LOC 1940Z 078DEG 3KT 3460 11931

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

Munroe/Lewis

Special weather statement, May 1, 3:01 PM PDT, 3 hours 8 minutes before

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Special weather statement, May 1, 4:43 PM PDT, 1 hour 26 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 1, 5:30 PM PDT	Special Weather Statement	LOX	Los Angeles	60 min
May 1, 5:31 PM PDT	Areal Flood Advisory	LOX	Los Angeles, Ventura	3 hr
May 1, 5:49 PM PDT	Special Weather Statement	LOX		86 min
May 1, 5:50 PM PDT	Areal Flood Advisory	LOX	Los Angeles	77 min
May 2, 11:49 AM PDT	Gale Warning	LOX		57 hr
May 2, 4:36 PM PDT	Areal Flood Advisory	LOX	San Luis Obispo, Santa Barbara	114 min

Nearby

Flash Flood Warnings in California, 2025 Every 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; radar from the NEXRAD Level II archive.