Alert archive / California / Flash Flood Warnings in 2013

Flash Flood Warning 12, NWS Hanford, CA

August 31, 2013Kern County, California

NWS Hanford, CA issued this flash flood warning at Aug 31, 2013, 2:29 PM PDT for Kern County, California. It was in force for 91 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: Aug 31, 2013, 2:29 PM PDT (21:29 UTC)
Expired: Aug 31, 2013, 4:00 PM PDT
In force: 91 min
Issued by: NWS Hanford, CA
Area: Storm-based polygon
Flood severity: None

County Kern County, CA

The radar

The Edwards AFB radar (KEYX), 110 km from the middle of the area, began a volume at 21:32 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, 9.5 hours before the alert went out and 175 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: 1642 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 23 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 Hanford, CA wrote its last area forecast discussion before this flash flood warning went out at Aug 31, 10:25 AM PDT, 4 hours 4 minutes earlier.

Area forecast discussion, Aug 31, 10:25 AM PDT, 4 hours 4 minutes before

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Hazardous weather outlook, Aug 31, 10:31 AM PDT, 3 hours 58 minutes before

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In the hours before

Special weather statement, Aug 31, 10:29 AM PDT, 4 hours before

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Local storm report, Aug 31, 1:06 PM PDT, 1 hour 23 minutes before

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Local storm report, Aug 31, 2:12 PM PDT, 17 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 31, 9:55 AM PDT	Flash Flood Watch	HNX		10 hr
Aug 31, 1:08 PM PDT	Flash Flood Warning	HNX	Kern	3 hr
Aug 31, 1:28 PM PDT	Areal Flood Advisory	HNX	Tulare	4 hr

Nearby

Flash Flood Warnings in California, 2013 Every flash flood warning in 2013

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.