Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 158, NWS Norman, OK

April 23, 2013Lincoln County, Logan County, Oklahoma County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Apr 23, 2013, 12:56 AM CDT for Lincoln County, Logan County, Oklahoma County, Oklahoma. 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: Apr 23, 2013, 12:56 AM CDT (05:56 UTC)
Expired: Apr 23, 2013, 1:45 AM CDT
In force: 49 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

Counties Lincoln County, OK, Logan County, OK, Oklahoma County, OK

The radar

The Norman radar (KTLX), 44 km from the middle of the area, began a volume at 05:55 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 22, 5:22 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 5.9 hours before the alert went out and 58 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: 150 J/kg
Mixed-layer CIN: -219 J/kg
Mixed-layer LCL: 1572 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 223 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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 22, 9:16 PM CDT, 3 hours 40 minutes earlier.

Area forecast discussion, Apr 22, 9:16 PM CDT, 3 hours 40 minutes before

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Hazardous weather outlook, Apr 23, 12:51 AM CDT, 5 minutes before

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In the hours before

Special weather statement, Apr 23, 12:15 AM CDT, 41 minutes before

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Local storm report, Apr 23, 12:16 AM CDT, 40 minutes before

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Local storm report, Apr 23, 12:22 AM CDT, 34 minutes before

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Local storm report, Apr 23, 12:24 AM CDT, 32 minutes before

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Special weather statement, Apr 23, 12:26 AM CDT, 30 minutes before

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Special weather statement, Apr 23, 12:48 AM CDT, 8 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 22, 7:12 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Grant	48 min
Apr 22, 7:23 PM CDT	Severe Thunderstorm Warning	OUN	Woods	37 min
Apr 22, 7:25 PM CDT	Severe Thunderstorm Warning	OUN	Ellis	50 min
Apr 22, 7:56 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Woods	49 min
Apr 22, 8:00 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Roger Mills	30 min
Apr 22, 8:28 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey, Ellis, Roger Mills	47 min
Apr 22, 8:30 PM CDT	Wind Advisory	OUN	Alfalfa, Beckham, Blaine, Caddo, Comanche, Cotton and 14 more	15 hr
Apr 22, 8:42 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Major	48 min
Apr 22, 9:10 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey	50 min
Apr 22, 9:49 PM CDT	Special Weather Statement	OUN	Blaine	41 min
Apr 22, 9:49 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Custer, Washita	41 min
Apr 22, 10:12 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Canadian, Kingfisher	48 min
Apr 22, 10:26 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Canadian, Custer, Washita	34 min
Apr 22, 10:46 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Kingfisher, Oklahoma	44 min
Apr 22, 10:54 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady	36 min
Apr 22, 11:27 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Oklahoma	33 min
Apr 22, 11:39 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland	51 min
Apr 22, 11:53 PM CDT	Severe Thunderstorm Warning	OUN	Oklahoma	37 min
Apr 23, 12:15 AM CDT	Special Weather Statement	OUN	Logan	30 min
Apr 23, 12:26 AM CDT	Special Weather Statement	OUN	Pottawatomie	34 min
Apr 23, 12:48 AM CDT	Special Weather Statement	OUN	Logan	27 min
Apr 23, 1:46 AM CDT	Special Weather Statement	OUN	Lincoln	29 min
Apr 23, 1:40 PM CDT	Frost Advisory	OUN	Atoka, Bryan, Carter, Coal, Cotton, Hughes and 6 more	19 hr
Apr 23, 1:40 PM CDT	Freeze Warning	OUN	Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 30 more	19 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2013 Every severe thunderstorm warning in 2013

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.