Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 779, NWS Norman, OK

August 17, 2019Jackson County, Kiowa County, Tillman County, Oklahoma; Wilbarger County, Texas

NWS Norman, OK issued this severe thunderstorm warning at Aug 17, 2019, 7:49 PM CDT for Jackson County, Kiowa County, Tillman County, Oklahoma; Wilbarger County, Texas. It was in force for 41 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 17, 2019, 7:49 PM CDT (00:49 UTC)
Expired: Aug 17, 2019, 8:30 PM CDT
In force: 41 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 90.0 mph

Counties Jackson County, OK, Kiowa County, OK, Tillman County, OK, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 21 km from the middle of the area, began a volume at 00:48 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, 0.8 hours before the alert went out and 178 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: 1996 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 2025 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 194 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.9

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 17, 7:04 PM CDT, 45 minutes earlier.

Area forecast discussion, Aug 17, 7:04 PM CDT, 45 minutes before

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Hazardous weather outlook, Aug 17, 11:43 AM CDT, 8 hours 6 minutes before

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In the hours before

Local storm report, Aug 17, 7:07 PM CDT, 42 minutes before

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Special weather statement, Aug 17, 7:15 PM CDT, 34 minutes before

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Local storm report, Aug 17, 7:37 PM CDT, 12 minutes before

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Special weather statement, Aug 17, 7:38 PM CDT, 11 minutes before

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Local storm report, Aug 17, 7:47 PM CDT, 2 minutes before

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Special weather statement, Aug 17, 7:48 PM CDT, 1 minute 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 17, 7:15 PM CDT	Special Weather Statement	OUN	Beckham	30 min
Aug 17, 7:21 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Jackson, Tillman	39 min
Aug 17, 7:38 PM CDT	Special Weather Statement	OUN	Beckham	52 min
Aug 17, 7:52 PM CDT	Special Weather Statement	OUN	Kiowa	23 min
Aug 17, 8:17 PM CDT	Special Weather Statement	OUN	Washita	28 min
Aug 17, 8:26 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Kiowa, Tillman	49 min
Aug 17, 9:02 PM CDT	Special Weather Statement	OUN	Kiowa	28 min
Aug 17, 9:15 PM CDT	Special Weather Statement	OUN	Tillman	30 min
Aug 17, 9:35 PM CDT	Areal Flood Advisory	OUN	Greer, Jackson, Kiowa, Tillman	3 hr
Aug 17, 9:38 PM CDT	Special Weather Statement	OUN	Jackson	37 min
Aug 17, 10:15 PM CDT	Special Weather Statement	OUN	Tillman	30 min
Aug 17, 10:34 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Jackson, Kiowa, Tillman	41 min
Aug 17, 10:37 PM CDT	Special Weather Statement	OUN	Canadian	23 min
Aug 17, 10:54 PM CDT	Special Weather Statement	OUN	Canadian	36 min
Aug 17, 11:05 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Kiowa, Tillman	40 min
Aug 17, 11:09 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Cleveland, Grady, McClain, Oklahoma	51 min
Aug 17, 11:43 PM CDT	Special Weather Statement	OUN	Comanche	32 min
Aug 17, 11:54 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Garvin, McClain, Pottawatomie	51 min
Aug 18, 12:13 AM CDT	Special Weather Statement	OUN	Stephens	32 min
Aug 18, 12:44 AM CDT	Special Weather Statement	OUN	Cleveland	31 min
Aug 18, 12:46 AM CDT	Special Weather Statement	OUN	Grady, McClain	44 min
Aug 18, 1:19 AM CDT	Special Weather Statement	OUN	McClain	41 min
Aug 18, 1:25 AM CDT	Special Weather Statement	OUN	Murray	50 min
Aug 18, 1:51 AM CDT	Special Weather Statement	OUN	Pottawatomie	39 min
Aug 18, 2:23 AM CDT	Special Weather Statement	OUN	Pottawatomie	52 min
Aug 18, 6:40 AM CDT	Special Weather Statement	OUN	Grant	35 min
Aug 18, 7:23 AM CDT	Special Weather Statement	OUN	Grant	52 min
Aug 18, 7:58 AM CDT	Special Weather Statement	OUN	Noble	32 min
Aug 18, 8:45 AM CDT	Special Weather Statement	OUN	Kay	30 min
Aug 18, 10:56 AM CDT	Special Weather Statement	OUN	Pottawatomie	49 min
Aug 18, 3:04 PM CDT	Excessive Heat Warning	OUN	Canadian, Cleveland, Garfield, Grant, Hughes, Kay and 8 more	30 hr
Aug 17, 7:48 PM CDT	Special Weather Statement	OUN	Foard	42 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2019 Severe Thunderstorm Warnings in Texas, 2019 Every severe thunderstorm warning in 2019

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.