Alert archive / California / Flash Flood Warnings in 2023

Flash Flood Warning 53, NWS Hanford, CA

August 20, 2023Kern County, California

NWS Hanford, CA issued this flash flood warning at Aug 20, 2023, 5:26 PM PDT for Kern County, California. It was in force for 7 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: Aug 20, 2023, 5:26 PM PDT (00:26 UTC)
Expired: Aug 21, 2023, 12:33 AM PDT
In force: 7 hr
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 00:26 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

Las Vegas, NV (KVEF), launched 00:00Z, 0.4 hours before the alert went out and 310 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: 945 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 196 m²/s²
0-3 km storm-relative helicity: 585 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 20, 1:51 PM PDT, 3 hours 35 minutes earlier.

Area forecast discussion, Aug 20, 1:51 PM PDT, 3 hours 35 minutes before

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In the hours before

Local storm report, Aug 20, 1:10 PM PDT, 4 hours 16 minutes before

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Local storm report, Aug 20, 1:11 PM PDT, 4 hours 15 minutes before

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Local storm report, Aug 20, 2:46 PM PDT, 2 hours 40 minutes before

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Local storm report, Aug 20, 3:37 PM PDT, 1 hour 49 minutes before

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Local storm report, Aug 20, 3:47 PM PDT, 1 hour 39 minutes before

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Local storm report, Aug 20, 5:08 PM PDT, 18 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 20, 5:00 PM PDT	Flash Flood Warning Considerable damage threat	HNX	Kern	8 hr
Aug 20, 5:19 PM PDT	Flash Flood Warning Considerable damage threat	HNX	Kern	6 hr
Aug 20, 5:29 PM PDT	Areal Flood Advisory	HNX	Tulare	6 hr
Aug 20, 5:36 PM PDT	Flash Flood Warning	HNX	Kern	6 hr
Aug 20, 5:59 PM PDT	Flash Flood Warning	HNX	Kern	5 hr
Aug 20, 6:02 PM PDT	Flash Flood Warning	HNX	Kern	6 hr
Aug 20, 6:04 PM PDT	Areal Flood Advisory	HNX	Kern	6 hr
Aug 20, 6:50 PM PDT	Flash Flood Warning	HNX	Kern	5 hr
Aug 20, 7:31 PM PDT	Areal Flood Advisory	HNX	Kern	5 hr
Aug 20, 7:53 PM PDT	Areal Flood Advisory	HNX	Tulare	4 hr
Aug 20, 8:01 PM PDT	Areal Flood Advisory	HNX	Fresno, Tulare	5 hr
Aug 20, 8:58 PM PDT	Areal Flood Advisory	HNX	Kern, Tulare	3 hr
Aug 20, 9:12 PM PDT	Flash Flood Warning Considerable damage threat	HNX	Kern	3 hr
Aug 20, 9:17 PM PDT	Areal Flood Advisory	HNX	Kern	3 hr
Aug 21, 12:16 PM PDT	Special Weather Statement	HNX	Merced	29 min
Aug 21, 12:35 PM PDT	Severe Thunderstorm Warning	HNX	Fresno, Merced	25 min
Aug 21, 12:38 PM PDT	Special Weather Statement	HNX	San Benito	37 min
Aug 21, 12:41 PM PDT	Tornado Warning	HNX	Merced	34 min
Aug 21, 12:54 PM PDT	Severe Thunderstorm Warning	HNX	Fresno	36 min
Aug 21, 1:12 PM PDT	Areal Flood Advisory	HNX	Merced	2 hr
Aug 21, 1:12 PM PDT	Tornado Warning	HNX	Merced	33 min
Aug 21, 1:22 PM PDT	Special Weather Statement	HNX	Merced	23 min
Aug 21, 1:28 PM PDT	Severe Thunderstorm Warning	HNX	Fresno, Merced	32 min
Aug 21, 1:45 PM PDT	Severe Thunderstorm Warning	HNX	Merced	30 min
Aug 21, 1:59 PM PDT	Severe Thunderstorm Warning	HNX	Fresno, Merced	34 min
Aug 21, 2:20 PM PDT	Special Weather Statement	HNX	San Benito	55 min
Aug 21, 2:23 PM PDT	Special Weather Statement	HNX	Merced	37 min
Aug 21, 2:31 PM PDT	Special Weather Statement	HNX		29 min
Aug 21, 2:33 PM PDT	Areal Flood Advisory	HNX	Fresno, Merced	117 min
Aug 21, 2:53 PM PDT	Severe Thunderstorm Warning	HNX	Kern	67 min
Aug 21, 2:56 PM PDT	Severe Thunderstorm Warning	HNX	Fresno	24 min
Aug 21, 2:57 PM PDT	Areal Flood Advisory	HNX	Kern	2 hr
Aug 21, 3:01 PM PDT	Special Weather Statement	HNX	Mariposa	29 min
Aug 21, 3:17 PM PDT	Severe Thunderstorm Warning	HNX	Kern	28 min
Aug 21, 3:27 PM PDT	Flash Flood Warning	HNX	Kern	109 min
Aug 21, 3:45 PM PDT	Severe Thunderstorm Warning	HNX	Kern	30 min

Nearby

Flash Flood Warnings in California, 2023 Every flash flood warning in 2023

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.