Alert archive / California / Flash Flood Warnings in 2008

Flash Flood Warning 25, NWS Los Angeles, CA

July 14, 2008Ventura County, California

NWS Los Angeles, CA issued this flash flood warning at Jul 14, 2008, 4:23 PM PDT for 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: Jul 14, 2008, 4:23 PM PDT (23:23 UTC)
Expired: Jul 14, 2008, 6:30 PM PDT
In force: 2 hr
Issued by: NWS Los Angeles, CA
Area: Storm-based polygon
Flood severity: None

County Ventura County, CA

The nearest sounding before it

Vandenberg AFB, CA (KVBG), launched 12:00Z, 11.4 hours before the alert went out and 132 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1314 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 36 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Jul 14, 1:15 PM PDT, 3 hours 8 minutes earlier.

Area forecast discussion, Jul 14, 1:15 PM PDT, 3 hours 8 minutes before

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Hazardous weather outlook, Jul 14, 8:00 AM PDT, 8 hours 23 minutes before

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In the hours before

Local storm report, Jul 14, 3:35 PM PDT, 48 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
Jul 13, 6:07 PM PDT	Flash Flood Warning	LOX	Los Angeles	83 min
Jul 13, 7:29 PM PDT	Flash Flood Warning	LOX	Los Angeles	61 min
Jul 14, 5:07 AM PDT	Flash Flood Watch	LOX	Santa Barbara	14 hr
Jul 14, 3:07 PM PDT	Flash Flood Warning	LOX	Ventura	83 min

Nearby

Flash Flood Warnings in California, 2008 Every flash flood warning in 2008

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.