Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 660, NWS Norman, OK

August 8, 2023Ellis County, Harper County, Woodward County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Aug 8, 2023, 1:31 AM CDT for Ellis County, Harper County, Woodward County, Oklahoma. It was in force for 44 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 8, 2023, 1:31 AM CDT (06:31 UTC)
Expired: Aug 8, 2023, 2:15 AM CDT
In force: 44 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Ellis County, OK, Harper County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 131 km from the middle of the area, began a volume at 06:30 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, 6.5 hours before the alert went out and 147 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: 317 J/kg
Mixed-layer CIN: -276 J/kg
Mixed-layer LCL: 1682 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 152 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 Aug 7, 11:32 PM CDT, 1 hour 59 minutes earlier.

Area forecast discussion, Aug 7, 11:32 PM CDT, 1 hour 59 minutes before

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Hazardous weather outlook, Aug 7, 5:27 PM CDT, 8 hours 4 minutes before

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In the hours before

Special weather statement, Aug 8, 12:55 AM CDT, 36 minutes before

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Special weather statement, Aug 8, 12:58 AM CDT, 33 minutes before

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Special weather statement, Aug 8, 1:01 AM CDT, 30 minutes before

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Special weather statement, Aug 8, 1:10 AM CDT, 21 minutes before

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Special weather statement, Aug 8, 1:12 AM CDT, 19 minutes before

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Special weather statement, Aug 8, 1:19 AM CDT, 12 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 7, 11:51 PM CDT	Special Weather Statement	OUN	Woods	24 min
Aug 8, 12:09 AM CDT	Special Weather Statement	OUN	Woods	36 min
Aug 8, 12:23 AM CDT	Special Weather Statement	OUN	Harper	37 min
Aug 8, 12:26 AM CDT	Special Weather Statement	OUN	Grant, Kay	34 min
Aug 8, 12:37 AM CDT	Special Weather Statement	OUN	Stephens	23 min
Aug 8, 12:46 AM CDT	Special Weather Statement	OUN	Alfalfa	29 min
Aug 8, 12:55 AM CDT	Special Weather Statement	OUN	Seminole	35 min
Aug 8, 12:58 AM CDT	Special Weather Statement	OUN	Alfalfa, Grant	32 min
Aug 8, 1:01 AM CDT	Special Weather Statement	OUN	Harper	29 min
Aug 8, 1:10 AM CDT	Special Weather Statement	OUN	Seminole	35 min
Aug 8, 1:12 AM CDT	Special Weather Statement	OUN	Grady	33 min
Aug 8, 1:12 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Grant, Major	33 min
Aug 8, 1:19 AM CDT	Special Weather Statement	OUN	Kay	26 min
Aug 8, 1:35 AM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Garfield	40 min
Aug 8, 1:50 AM CDT	Special Weather Statement	OUN	Seminole	25 min
Aug 8, 1:54 AM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Major, Woods, Woodward	51 min
Aug 8, 1:56 AM CDT	Areal Flood Advisory	OUN	Hughes	5 hr
Aug 8, 1:58 AM CDT	Special Weather Statement	OUN	Okfuskee	32 min
Aug 8, 2:02 AM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Garfield, Noble	43 min
Aug 8, 2:14 AM CDT	Special Weather Statement	OUN	Hughes	31 min
Aug 8, 2:22 AM CDT	Special Weather Statement	OUN	Lincoln	23 min
Aug 8, 2:29 AM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Kingfisher, Lincoln, Logan, Noble, Payne	46 min
Aug 8, 2:39 AM CDT	Special Weather Statement	OUN	Lincoln	36 min
Aug 8, 2:42 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Custer, Dewey, Major, Roger Mills	48 min
Aug 8, 2:43 AM CDT	Areal Flood Advisory	OUN	Logan, Payne	3 hr
Aug 8, 2:56 AM CDT	Areal Flood Advisory	OUN	Payne	3 hr
Aug 8, 3:04 AM CDT	Special Weather Statement	OUN	Oklahoma	26 min
Aug 8, 3:23 AM CDT	Special Weather Statement	OUN	Blaine	22 min
Aug 8, 3:27 AM CDT	Areal Flood Advisory	OUN	Lincoln, Oklahoma	3 hr
Aug 8, 3:27 AM CDT	Special Weather Statement	OUN	Okfuskee	33 min
Aug 8, 3:30 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Lincoln, Logan, Oklahoma, Pottawatomie	45 min
Aug 8, 3:44 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Canadian, Grady	46 min
Aug 8, 4:06 AM CDT	Heat Advisory	OUN	Jefferson, Love, Marshall	16 hr
Aug 8, 4:14 AM CDT	Special Weather Statement	OUN	Pottawatomie	31 min
Aug 8, 4:22 AM CDT	Flash Flood Warning	OUN	Oklahoma	3 hr
Aug 8, 4:26 AM CDT	Severe Thunderstorm Warning	OUN	Canadian, Cleveland, Grady, McClain, Oklahoma	34 min
Aug 8, 4:32 AM CDT	Special Weather Statement	OUN	Cleveland	28 min
Aug 8, 4:46 AM CDT	Special Weather Statement	OUN	Seminole	29 min
Aug 8, 4:50 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain	40 min
Aug 8, 5:25 AM CDT	Special Weather Statement	OUN	Pottawatomie	35 min
Aug 8, 2:16 PM CDT	Red Flag Warning	OUN	Comanche, Cotton, Jackson, Jefferson, Stephens, Tillman	32 hr
Aug 8, 2:21 PM CDT	Heat Advisory	OUN	Atoka, Bryan, Carter, Coal, Cotton, Garvin and 9 more	31 hr
Aug 7, 10:09 PM CDT	Special Weather Statement	OUN	Baylor	36 min
Aug 7, 10:19 PM CDT	Severe Thunderstorm Warning	OUN	Baylor	41 min
Aug 7, 10:47 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Baylor	30 min
Aug 7, 10:57 PM CDT	Special Weather Statement	OUN	Wilbarger	33 min
Aug 8, 12:38 AM CDT	Special Weather Statement	OUN	Wichita	37 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.