Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 363, NWS Norman, OK

June 23, 20185 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 23, 2018, 1:22 AM CDT for 5 counties in Oklahoma. 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: Jun 23, 2018, 1:22 AM CDT (06:22 UTC)
Expired: Jun 23, 2018, 2:03 AM CDT
In force: 41 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Carter County, OK, Garvin County, OK, Grady County, OK, McClain County, OK, Stephens County, OK

The radar

The Norman radar (KTLX), 75 km from the middle of the area, began a volume at 06:22 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
Jun 22, 9:27 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 6.4 hours before the alert went out and 60 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: 495 J/kg
Mixed-layer CIN: -405 J/kg
Mixed-layer LCL: 1761 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 293 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.

NWS Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 23, 12:35 AM CDT, 47 minutes earlier.

Area forecast discussion, Jun 23, 12:35 AM CDT, 47 minutes before

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Hazardous weather outlook, Jun 22, 8:27 PM CDT, 4 hours 55 minutes before

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In the hours before

Local storm report, Jun 22, 11:52 PM CDT, 1 hour 30 minutes before

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Local storm report, Jun 23, 12:04 AM CDT, 1 hour 18 minutes before

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Local storm report, Jun 23, 12:08 AM CDT, 1 hour 14 minutes before

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Special weather statement, Jun 23, 12:12 AM CDT, 1 hour 10 minutes before

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Local storm report, Jun 23, 12:40 AM CDT, 42 minutes before

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Special weather statement, Jun 23, 1:17 AM CDT, 5 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
Jun 22, 7:26 PM CDT	Special Weather Statement	OUN	Harper	19 min
Jun 22, 7:37 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper, Woods, Woodward	38 min
Jun 22, 8:12 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Dewey, Ellis, Harper, Major, Roger Mills and 2 more	48 min
Jun 22, 8:56 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Blaine, Dewey, Garfield, Grant, Major and 2 more	49 min
Jun 22, 9:02 PM CDT	Special Weather Statement	OUN	Beckham, Custer, Dewey, Roger Mills	28 min
Jun 22, 9:11 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Blaine, Custer, Dewey, Ellis, Major and 3 more	49 min
Jun 22, 9:24 PM CDT	Special Weather Statement	OUN	Garfield	21 min
Jun 22, 9:39 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Blaine, Dewey, Garfield, Grant, Kay and 5 more	51 min
Jun 22, 9:53 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Blaine, Caddo, Canadian, Custer, Dewey and 5 more	52 min
Jun 22, 10:23 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Canadian, Cleveland, Garfield, Grady and 8 more	52 min
Jun 22, 10:42 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Caddo, Comanche, Custer, Greer, Kiowa and 2 more	48 min
Jun 22, 10:44 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Roger Mills	46 min
Jun 22, 11:06 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Cleveland, Garvin, Grady, Kingfisher and 7 more	39 min
Jun 22, 11:08 PM CDT	Special Weather Statement	OUN	Payne	37 min
Jun 22, 11:28 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Caddo, Comanche, Custer, Grady, Greer and 6 more	47 min
Jun 22, 11:44 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Cleveland, Garvin, Grady, Hughes, McClain and 5 more	46 min
Jun 22, 11:51 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Caddo, Carter, Comanche, Cotton, Custer and 8 more	39 min
Jun 23, 12:12 AM CDT	Special Weather Statement	OUN	Jefferson	33 min
Jun 23, 12:25 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Comanche, Custer, Grady, Kiowa and 1 more	50 min
Jun 23, 12:28 AM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan, Carter, Coal, Garvin, Hughes and 8 more	62 min
Jun 23, 1:17 AM CDT	Special Weather Statement	OUN	Cleveland, Grady, McClain	28 min
Jun 23, 1:28 AM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan, Coal, Hughes, Johnston	62 min
Jun 23, 4:11 AM CDT	Special Weather Statement	OUN	Canadian	34 min
Jun 23, 7:28 AM CDT	Special Weather Statement	OUN	Stephens	47 min
Jun 23, 8:01 AM CDT	Special Weather Statement	OUN	Murray	59 min
Jun 23, 8:27 AM CDT	Areal Flood Advisory	OUN	Carter, Coal, Garvin, Johnston, Murray, Pontotoc	3 hr
Jun 23, 8:45 AM CDT	Special Weather Statement	OUN	Atoka, Johnston	45 min
Jun 23, 9:32 AM CDT	Flash Flood Warning	OUN	Murray	106 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2018 Every severe thunderstorm warning in 2018

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.