Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 177, NWS Norman, OK

June 12, 201415 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 12, 2014, 2:28 AM CDT for 15 counties in Oklahoma. It was in force for 47 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 12, 2014, 2:28 AM CDT (07:28 UTC)
Expired: Jun 12, 2014, 3:15 AM CDT
In force: 47 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Canadian County, OK, Cleveland County, OK, Garvin County, OK, Grady County, OK, Hughes County, OK, Lincoln County, OK, Logan County, OK, McClain County, OK, Noble County, OK, Oklahoma County, OK, Payne County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Stephens County, OK

The radar

The Norman radar (KTLX), 6 km from the middle of the area, began a volume at 07:30 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jun 11, 9:49 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 7.5 hours before the alert went out and 20 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: 1021 J/kg
Mixed-layer CIN: -307 J/kg
Mixed-layer LCL: 1980 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 116 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 12, 2:27 AM CDT, 1 minute earlier.

Area forecast discussion, Jun 12, 2:27 AM CDT, 1 minute before

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Hazardous weather outlook, Jun 12, 1:53 AM CDT, 35 minutes before

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In the hours before

Local storm report, Jun 12, 1:11 AM CDT, 1 hour 17 minutes before

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Local storm report, Jun 12, 1:22 AM CDT, 1 hour 6 minutes before

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Local storm report, Jun 12, 1:29 AM CDT, 59 minutes before

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Special weather statement, Jun 12, 1:29 AM CDT, 59 minutes before

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Local storm report, Jun 12, 1:56 AM CDT, 32 minutes before

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Local storm report, Jun 12, 2:10 AM CDT, 18 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 11, 9:42 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper	48 min
Jun 11, 10:25 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper, Woods, Woodward	50 min
Jun 11, 11:14 PM CDT	Severe Thunderstorm Warning	OUN	Dewey, Ellis, Major, Roger Mills, Woods, Woodward	46 min
Jun 11, 11:36 PM CDT	Special Weather Statement	OUN	Alfalfa, Woods	39 min
Jun 11, 11:55 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Custer, Dewey, Ellis, Kingfisher, Major and 2 more	50 min
Jun 12, 12:05 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Grant, Woods	40 min
Jun 12, 12:40 AM CDT	Severe Thunderstorm Warning	OUN	Ellis, Roger Mills	35 min
Jun 12, 12:45 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Blaine, Caddo, Canadian, Garfield, Grant and 5 more	45 min
Jun 12, 12:48 AM CDT	Special Weather Statement	OUN	Custer, Washita	27 min
Jun 12, 1:12 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Canadian, Cleveland, Garfield, Grady and 8 more	48 min
Jun 12, 1:29 AM CDT	Special Weather Statement	OUN	Custer	46 min
Jun 12, 1:37 AM CDT	Areal Flood Advisory	OUN	Custer, Dewey, Ellis, Roger Mills, Woodward	113 min
Jun 12, 1:48 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Cleveland, Comanche, Garfield, Grady and 9 more	42 min
Jun 12, 3:14 AM CDT	Special Weather Statement	OUN	Garvin, Murray, Pottawatomie, Seminole, Stephens	31 min
Jun 12, 3:51 AM CDT	Special Weather Statement	OUN	Carter, Coal, Garvin, Hughes, Jefferson, Johnston and 3 more	24 min
Jun 12, 3:55 AM CDT	Special Weather Statement	OUN	Canadian	35 min
Jun 12, 4:19 AM CDT	Special Weather Statement	OUN	Atoka, Carter, Coal, Hughes, Johnston, Love and 2 more	26 min
Jun 12, 4:28 AM CDT	Special Weather Statement	OUN	Canadian	32 min
Jun 12, 4:43 AM CDT	Special Weather Statement	OUN	Atoka, Bryan, Coal, Johnston, Marshall	32 min
Jun 12, 5:04 AM CDT	Special Weather Statement	OUN	Canadian, Oklahoma	26 min
Jun 12, 5:26 AM CDT	Special Weather Statement	OUN	Bryan	34 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2014 Every severe thunderstorm warning in 2014

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.