Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 839, NWS Norman, OK

August 15, 2024Harmon County, Jackson County, Oklahoma; Hardeman County, Texas

NWS Norman, OK issued this severe thunderstorm warning at Aug 15, 2024, 7:56 PM CDT for Harmon County, Jackson County, Oklahoma; Hardeman County, Texas. It was in force for 49 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 15, 2024, 7:56 PM CDT (00:56 UTC)
Expired: Aug 15, 2024, 8:45 PM CDT
In force: 49 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Harmon County, OK, Jackson County, OK, Hardeman County, TX

The radar

The Altus AFB radar (KFDR), 67 km from the middle of the area, began a volume at 00:58 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 15, 6:02 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 0.9 hours before the alert went out and 220 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: 1966 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 2222 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 142 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.8

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 15, 6:24 PM CDT, 1 hour 32 minutes earlier.

Area forecast discussion, Aug 15, 6:24 PM CDT, 1 hour 32 minutes before

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Hazardous weather outlook, Aug 15, 2:26 PM CDT, 5 hours 30 minutes before

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In the hours before

Special weather statement, Aug 15, 7:15 PM CDT, 41 minutes before

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Local storm report, Aug 15, 7:24 PM CDT, 32 minutes before

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Special weather statement, Aug 15, 7:26 PM CDT, 30 minutes before

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Special weather statement, Aug 15, 7:41 PM CDT, 15 minutes before

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Special weather statement, Aug 15, 7:45 PM CDT, 11 minutes before

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Special weather statement, Aug 15, 7:46 PM CDT, 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
Aug 15, 7:07 PM CDT	Special Weather Statement	OUN	Greer	38 min
Aug 15, 7:15 PM CDT	Special Weather Statement	OUN	Noble	30 min
Aug 15, 7:26 PM CDT	Special Weather Statement	OUN	Caddo	34 min
Aug 15, 7:41 PM CDT	Special Weather Statement	OUN	Harmon	34 min
Aug 15, 7:45 PM CDT	Special Weather Statement	OUN	McClain	30 min
Aug 15, 7:46 PM CDT	Special Weather Statement	OUN	Noble	29 min
Aug 15, 8:00 PM CDT	Special Weather Statement	OUN	Kiowa	30 min
Aug 15, 8:04 PM CDT	Special Weather Statement	OUN	Noble	26 min
Aug 15, 8:05 PM CDT	Special Weather Statement	OUN	Payne	25 min
Aug 15, 8:13 PM CDT	Special Weather Statement	OUN	Jackson	32 min
Aug 15, 8:15 PM CDT	Special Weather Statement	OUN	Kiowa	30 min
Aug 15, 8:21 PM CDT	Severe Thunderstorm Warning	OUN	Jackson	24 min
Aug 15, 8:31 PM CDT	Special Weather Statement	OUN	Payne	29 min
Aug 15, 8:37 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Jackson, Kiowa, Tillman	38 min
Aug 15, 8:37 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan, Noble, Payne	53 min
Aug 15, 9:13 PM CDT	Special Weather Statement	OUN	Lincoln	32 min
Aug 15, 9:13 PM CDT	Special Weather Statement	OUN	Tillman	47 min
Aug 15, 9:31 PM CDT	Special Weather Statement	OUN	Payne	14 min
Aug 15, 9:38 PM CDT	Special Weather Statement	OUN	Lincoln	37 min
Aug 15, 9:53 PM CDT	Special Weather Statement	OUN	Garfield	37 min
Aug 15, 9:55 PM CDT	Special Weather Statement	OUN	Lincoln	35 min
Aug 15, 9:59 PM CDT	Special Weather Statement	OUN	Tillman	31 min
Aug 15, 10:08 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	41 min
Aug 15, 11:04 PM CDT	Special Weather Statement	OUN	Payne	26 min
Aug 15, 11:08 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Lincoln, Payne	52 min
Aug 16, 12:26 AM CDT	Special Weather Statement	OUN	Lincoln	64 min
Aug 16, 2:34 AM CDT	Excessive Heat Warning	OUN	Atoka, Bryan, Coal, Hughes, Johnston, Marshall and 2 more	17 hr
Aug 16, 2:41 PM CDT	Excessive Heat Warning	OUN	Atoka, Bryan, Canadian, Carter, Cleveland, Coal and 20 more	30 hr
Aug 16, 2:41 PM CDT	Heat Advisory	OUN	Alfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 18 more	30 hr
Aug 16, 3:09 PM CDT	Special Weather Statement	OUN	Ellis, Woodward	36 min
Aug 16, 3:18 PM CDT	Severe Thunderstorm Warning	OUN	Dewey, Ellis, Woodward	27 min
Aug 16, 3:43 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Dewey, Ellis, Woodward	47 min
Aug 16, 4:25 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Custer, Dewey, Ellis, Major, Roger Mills, Woodward	50 min
Aug 16, 5:12 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Custer, Dewey, Roger Mills	48 min
Aug 16, 6:05 PM CDT	Special Weather Statement	OUN	Custer	25 min
Aug 16, 6:14 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Woods	46 min
Aug 16, 6:42 PM CDT	Severe Thunderstorm Warning	OUN	Grant	33 min
Aug 16, 6:49 PM CDT	Special Weather Statement	OUN	Washita	26 min
Aug 16, 6:52 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Washita	38 min
Aug 16, 6:53 PM CDT	Special Weather Statement	OUN	Dewey	37 min
Aug 15, 8:42 PM CDT	Special Weather Statement	OUN	Hardeman	33 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2024 Severe Thunderstorm Warnings in Texas, 2024 Every severe thunderstorm warning in 2024

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.