Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 78, NWS Norman, OK

April 23, 2022Harper County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Apr 23, 2022, 4:17 AM CDT for Harper County, Oklahoma. It was in force for 43 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: Apr 23, 2022, 4:17 AM CDT (09:17 UTC)
Expired: Apr 23, 2022, 5:00 AM CDT
In force: 43 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Damage threat: Considerable
Hail: 1.0 in
Wind: 70.0 mph

County Harper County, OK

The radar

The Dodge City radar (KDDC), 111 km from the middle of the area, began a volume at 09:21 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

Dodge City, (KDDC), launched 00:00Z, 9.3 hours before the alert went out and 111 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: 1942 J/kg
Mixed-layer CIN: -81 J/kg
Mixed-layer LCL: 1404 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 126 m²/s²
0-3 km storm-relative helicity: 230 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 10.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 23, 2:22 AM CDT, 1 hour 55 minutes earlier.

Area forecast discussion, Apr 23, 2:22 AM CDT, 1 hour 55 minutes before

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Hazardous weather outlook, Apr 23, 3:49 AM CDT, 28 minutes before

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In the hours before

Local storm report, Apr 22, 10:43 PM CDT, 5 hours 34 minutes before

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Local storm report, Apr 22, 11:02 PM CDT, 5 hours 15 minutes before

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Local storm report, Apr 23, 1:07 AM CDT, 3 hours 10 minutes before

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The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 23, 2:19 AM CDT	Flood Watch	OUN	Atoka, Bryan, Carter, Cleveland, Coal, Comanche and 16 more	48 hr
Apr 23, 2:34 AM CDT	Red Flag Warning	OUN	Alfalfa, Beckham, Custer, Dewey, Ellis, Greer and 9 more	18 hr
Apr 23, 5:04 AM CDT	Special Weather Statement	OUN	Woodward	26 min
Apr 23, 5:08 PM CDT	Special Weather Statement	OUN	Canadian	37 min
Apr 23, 5:11 PM CDT	Special Weather Statement	OUN	Kiowa	34 min
Apr 23, 5:35 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher, Logan	40 min
Apr 23, 5:44 PM CDT	Special Weather Statement	OUN	Caddo, Canadian	31 min
Apr 23, 5:49 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady	41 min
Apr 23, 6:00 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Grady	45 min
Apr 23, 6:10 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kay, Logan, Noble	37 min
Apr 23, 6:14 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher, Logan, Noble, Payne	46 min
Apr 23, 6:21 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Kingfisher, Logan	39 min
Apr 23, 6:29 PM CDT	Special Weather Statement	OUN	Caddo	31 min
Apr 23, 6:31 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Caddo, Canadian, Grady	44 min
Apr 23, 6:37 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Kiowa	38 min
Apr 23, 6:53 PM CDT	Special Weather Statement	OUN	Tillman	37 min
Apr 23, 6:58 PM CDT	Severe Thunderstorm Warning	OUN	Logan, Noble, Payne	47 min
Apr 23, 6:59 PM CDT	Tornado Warning	OUN	Logan, Payne	46 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2022 Every severe thunderstorm warning in 2022

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.