Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 649, NWS Norman, OK

August 6, 20235 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Aug 6, 2023, 2:27 AM CDT for 5 counties in Oklahoma. It was in force for 48 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 6, 2023, 2:27 AM CDT (07:27 UTC)
Expired: Aug 6, 2023, 3:15 AM CDT
In force: 48 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Alfalfa County, OK, Garfield County, OK, Grant County, OK, Major County, OK, Woods County, OK

The radar

The Vance AFB radar (KVNX), 20 km from the middle of the area, began a volume at 07:28 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

Norman, OK (KOUN), launched 00:00Z, 7.5 hours before the alert went out and 172 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: 267 J/kg
Mixed-layer CIN: -360 J/kg
Mixed-layer LCL: 2618 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: 25 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 severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

Hazardous weather outlook, Aug 5, 9:53 PM CDT, 4 hours 34 minutes before

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In the hours before

Special weather statement, Aug 6, 12:41 AM CDT, 1 hour 46 minutes before

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Special weather statement, Aug 6, 12:55 AM CDT, 1 hour 32 minutes before

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Special weather statement, Aug 6, 1:10 AM CDT, 1 hour 17 minutes before

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Special weather statement, Aug 6, 1:11 AM CDT, 1 hour 16 minutes before

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Special weather statement, Aug 6, 1:46 AM CDT, 41 minutes before

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Local storm report, Aug 6, 2:04 AM CDT, 23 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
Aug 5, 11:31 PM CDT	Special Weather Statement	OUN	Grant	29 min
Aug 6, 12:02 AM CDT	Special Weather Statement	OUN	Kay	28 min
Aug 6, 12:41 AM CDT	Special Weather Statement	OUN	Grant	34 min
Aug 6, 12:55 AM CDT	Special Weather Statement	OUN	Payne	20 min
Aug 6, 1:10 AM CDT	Special Weather Statement	OUN	Kay	35 min
Aug 6, 1:11 AM CDT	Special Weather Statement	OUN	Woods	34 min
Aug 6, 1:46 AM CDT	Special Weather Statement	OUN	Alfalfa	29 min
Aug 6, 2:07 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Major, Woods	23 min
Aug 6, 2:18 AM CDT	Areal Flood Advisory	OUN	Kay	3 hr
Aug 6, 2:33 AM CDT	Special Weather Statement	OUN	Comanche, Tillman	27 min
Aug 6, 2:34 AM CDT	Areal Flood Advisory	OUN	Kay	3 hr
Aug 6, 2:40 AM CDT	Excessive Heat Warning	OUN	Atoka, Bryan, Marshall	18 hr
Aug 6, 2:55 AM CDT	Special Weather Statement	OUN	Cotton, Stephens	35 min
Aug 6, 3:12 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Grant, Kay, Major, Noble	33 min
Aug 6, 3:24 AM CDT	Areal Flood Advisory	OUN	Grant	3 hr
Aug 6, 3:25 AM CDT	Special Weather Statement	OUN	Jefferson, Stephens	35 min
Aug 6, 3:44 AM CDT	Special Weather Statement	OUN	Pottawatomie, Seminole	31 min
Aug 6, 4:32 AM CDT	Special Weather Statement	OUN	Coal, Johnston, Pontotoc	28 min
Aug 6, 5:06 AM CDT	Special Weather Statement	OUN	Atoka, Bryan, Johnston	24 min
Aug 6, 5:37 AM CDT	Special Weather Statement	OUN	Atoka, Bryan	23 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2023 Every severe thunderstorm 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.