Alert archive / California / Flash Flood Warnings in 2019

Flash Flood Warning 12, NWS Los Angeles, CA

March 5, 2019Santa Barbara County, Ventura County, California

NWS Los Angeles, CA issued this flash flood warning at Mar 5, 2019, 9:07 PM PST for Santa Barbara County, Ventura County, California. It was in force for 83 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
Mar 5, 2019, 9:07 PM PST (05:07 UTC)
Expired
Mar 5, 2019, 10:30 PM PST
In force
83 min
Issued by
NWS Los Angeles, CA
Area
Storm-based polygon
Flood severity
None

Counties Santa Barbara County, CA, Ventura County, CA

The radar

The Los Angeles radar (KVTX), 37 km from the middle of the area, began a volume at 05:10 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 00:00Z, 5.1 hours before the alert went out and 286 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 00:00Z on 2019-03-06Temperature 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 00:00Z on 2019-03-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 127 square meters per square second.19395878Sfc1 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
2665 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
127 m²/s²
0-3 km storm-relative helicity
209 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
Mar 5, 6:31 PM PSTSpecial Marine WarningLOX59 min
Mar 5, 7:29 PM PSTSpecial Weather StatementLOXSanta Barbara31 min
Mar 5, 7:55 PM PSTSpecial Marine WarningLOX80 min
Mar 5, 8:30 PM PSTAreal Flood AdvisoryLOXSan Luis Obispo, Santa Barbara3 hr
Mar 5, 8:41 PM PSTAreal Flood AdvisoryLOXSan Luis Obispo3 hr
Mar 5, 8:59 PM PSTSpecial Weather StatementLOXVentura61 min
Mar 6, 12:18 AM PSTAreal Flood AdvisoryLOXSanta Barbara4 hr
Mar 6, 3:26 AM PSTAreal Flood AdvisoryLOXVentura5 hr
Mar 6, 5:34 AM PSTAreal Flood AdvisoryLOXLos Angeles5 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.