Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 101, NWS Norman, OK

April 17, 20194 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Apr 17, 2019, 9:44 PM CDT for 4 counties in Oklahoma. It was in force for 46 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 17, 2019, 9:44 PM CDT (02:44 UTC)
Expired: Apr 17, 2019, 10:30 PM CDT
In force: 46 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Atoka County, OK, Bryan County, OK, Johnston County, OK, Marshall County, OK

The radar

The Norman radar (KTLX), 151 km from the middle of the area, began a volume at 02:43 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
Apr 17, 6:16 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 2.7 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: 2231 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 988 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 186 m²/s²
0-3 km storm-relative helicity: 200 m²/s²
Significant tornado parameter: 2.9
Supercell composite: 13.7

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 17, 6:19 PM CDT, 3 hours 25 minutes earlier.

Area forecast discussion, Apr 17, 6:19 PM CDT, 3 hours 25 minutes before

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Hazardous weather outlook, Apr 17, 6:06 PM CDT, 3 hours 38 minutes before

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In the hours before

Local storm report, Apr 17, 5:45 PM CDT, 3 hours 59 minutes before

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Special weather statement, Apr 17, 6:27 PM CDT, 3 hours 17 minutes before

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Local storm report, Apr 17, 6:30 PM CDT, 3 hours 14 minutes before

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Local storm report, Apr 17, 6:39 PM CDT, 3 hours 5 minutes before

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Local storm report, Apr 17, 6:42 PM CDT, 3 hours 2 minutes before

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Special weather statement, Apr 17, 6:42 PM CDT, 3 hours 2 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 17, 7:01 PM CDT	Severe Thunderstorm Warning	OUN	Woods, Woodward	33 min
Apr 17, 7:11 PM CDT	Special Weather Statement	OUN	Love	34 min
Apr 17, 7:22 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Jefferson, Love	53 min
Apr 17, 7:29 PM CDT	Special Weather Statement	OUN	Kay	31 min
Apr 17, 7:42 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Custer, Dewey, Kingfisher, Major	48 min
Apr 17, 7:46 PM CDT	Special Weather Statement	OUN	Alfalfa	29 min
Apr 17, 8:00 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Jefferson, Murray, Stephens	28 min
Apr 17, 8:04 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Canadian, Kingfisher	41 min
Apr 17, 8:11 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Love, Marshall	49 min
Apr 17, 8:17 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Grant	43 min
Apr 17, 8:24 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Garfield, Kingfisher, Major	51 min
Apr 17, 8:35 PM CDT	Special Weather Statement	OUN	Garfield	25 min
Apr 17, 8:40 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher, Logan	50 min
Apr 17, 8:53 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant, Kay, Noble	52 min
Apr 17, 8:56 PM CDT	Severe Thunderstorm Warning	OUN	Bryan, Johnston, Love, Marshall	49 min
Apr 17, 8:58 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher, Logan, Noble	47 min
Apr 17, 9:13 PM CDT	Special Weather Statement	OUN	Oklahoma	32 min
Apr 17, 9:21 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan, Noble, Payne	39 min
Apr 17, 9:26 PM CDT	Special Weather Statement	OUN	Canadian	34 min
Apr 17, 9:31 PM CDT	Severe Thunderstorm Warning	OUN	Kay, Noble, Payne	56 min
Apr 17, 9:43 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Grady, Oklahoma	32 min
Apr 17, 9:58 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Payne	47 min
Apr 17, 9:59 PM CDT	Special Weather Statement	OUN	Logan	31 min
Apr 17, 10:08 PM CDT	Areal Flood Advisory	OUN	Canadian, Oklahoma	2 hr
Apr 17, 10:14 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Cleveland, Grady, Logan, McClain, Oklahoma	61 min
Apr 17, 10:19 PM CDT	Special Weather Statement	OUN	Grady	26 min
Apr 17, 10:31 PM CDT	Severe Thunderstorm Warning	OUN	Grady	24 min
Apr 17, 10:42 PM CDT	Special Weather Statement	OUN	Lincoln	33 min
Apr 17, 10:44 PM CDT	Special Weather Statement	OUN	Atoka	31 min
Apr 17, 10:52 PM CDT	Special Weather Statement	OUN	McClain	23 min
Apr 17, 11:08 PM CDT	Special Weather Statement	OUN	Cleveland	37 min
Apr 17, 11:13 PM CDT	Special Weather Statement	OUN	Lincoln	32 min
Apr 17, 11:17 PM CDT	Special Weather Statement	OUN	Lincoln	28 min
Apr 17, 11:37 PM CDT	Special Weather Statement	OUN	Bryan	23 min
Apr 18, 12:03 AM CDT	Special Weather Statement	OUN	Marshall	27 min
Apr 18, 12:15 AM CDT	Special Weather Statement	OUN	Bryan	30 min
Apr 18, 12:27 AM CDT	Special Weather Statement	OUN	Alfalfa, Dewey, Ellis, Grant, Major, Woods and 1 more	63 min
Apr 18, 4:17 PM CDT	Special Weather Statement	OUN	Garfield	28 min
Apr 18, 4:30 PM CDT	Special Weather Statement	OUN	Kay	30 min
Apr 18, 4:47 PM CDT	Special Weather Statement	OUN	Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 27 more	58 min
Apr 18, 5:27 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Oklahoma	18 min
Apr 18, 5:46 PM CDT	Special Weather Statement	OUN	Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 30 more	59 min
Apr 18, 6:38 PM CDT	Special Weather Statement	OUN	Murray	37 min
Apr 18, 6:52 PM CDT	Special Weather Statement	OUN	Caddo, Grady, McClain	23 min
Apr 18, 6:56 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Coal, Johnston, Marshall, Murray, Pontotoc	49 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 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.