Alert archive / California / Flash Flood Warnings in 2019
Flash Flood Warning 11, NWS Los Angeles, CA
NWS Los Angeles, CA issued this flash flood warning at Feb 4, 2019, 9:27 AM PST for Los Angeles County, Ventura County, California. It was in force for 2 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 4, 2019, 9:27 AM PST (17:27 UTC)
- Expired
- Feb 4, 2019, 11:48 AM PST
- In force
- 2 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 17:29 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, 5.5 hours before the alert went out and 173 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
- 2 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 833 m above ground
- 0-6 km bulk shear
- 112 kt
- 0-1 km storm-relative helicity
- 678 m²/s²
- 0-3 km storm-relative helicity
- 896 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 4, 4:17 AM PST, 5 hours 10 minutes earlier.
Area forecast discussion, Feb 4, 4:17 AM PST, 5 hours 10 minutes before
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Special weather statement, Feb 4, 5:10 AM PST, 4 hours 17 minutes before
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</html>Special weather statement, Feb 4, 6:41 AM PST, 2 hours 46 minutes before
Special Weather Statement
National Weather Service OXNARD CA
641 AM PST MON FEB 4 2019
CAZ036-039-052-041530-
Santa Ynez Valley CA-Santa Barbara County South Coast CA-
Santa Barbara County Mountains CA-
641 AM PST MON FEB 4 2019
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL SANTA BARBARA COUNTY
UNTIL 730 AM PST...
At 637 AM PST, Doppler radar was tracking a a couple of rotating
storms in the Santa Barbara Channel that will bring brief periods of
heavy rain, small hail, and the possibility of funnel clouds or weak
tornados between Refugio State Beach and Goleta.
Half inch hail and wind gusts up to 50 mph will be possible with this
storm.
Locations impacted include...
El Capitan State Beach...Refugio State Beach...Isla Vista...
Summerland...Goleta.
LAT...LON 3457 12005 3453 11973 3443 11959 3441 11964
3442 11968 3439 11971 3442 11979 3441 11988
3443 11992 3443 11996 3446 12001 3446 12009
3447 12014 3447 12020
TIME...MOT...LOC 1437Z 240DEG 48KT 3458 11989
Kaplan/ASRThe office that day
Everything else NWS Los Angeles, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 4, 3:38 AM PST | Wind Advisory | LOX | Santa Barbara | 41 hr |
| Feb 4, 5:07 AM PST | Areal Flood Advisory | LOX | San Luis Obispo | 82 min |
| Feb 4, 5:10 AM PST | Special Weather Statement | LOX | Santa Barbara | 50 min |
| Feb 4, 5:56 AM PST | Areal Flood Advisory | LOX | Santa Barbara | 94 min |
| Feb 4, 6:05 AM PST | Special Marine Warning | LOX | 55 min | |
| Feb 4, 6:41 AM PST | Special Weather Statement | LOX | Santa Barbara | 49 min |
| Feb 4, 7:54 AM PST | Areal Flood Advisory | LOX | Ventura | 111 min |
| Feb 4, 8:29 AM PST | Special Marine Warning | LOX | 31 min | |
| Feb 4, 9:20 AM PST | Areal Flood Advisory | LOX | Los Angeles | 3 hr |
| Feb 4, 11:12 AM PST | Beach Hazards Statement | LOX | Los Angeles | 53 hr |
| Feb 4, 11:12 AM PST | High Surf Advisory | LOX | 53 hr | |
| Feb 4, 12:15 PM PST | Areal Flood Advisory | LOX | Los Angeles | 2 hr |
| Feb 4, 1:24 PM PST | Winter Weather Advisory | LOX | Santa Barbara | 37 hr |
| Feb 4, 3:09 PM PST | Wind Advisory | LOX | Santa Barbara | 19 hr |
Nearby
Flash Flood Warnings in California, 2019Every flash flood warning in 2019
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.