Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 641, NWS Norman, OK

October 17, 2007Payne County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Oct 17, 2007, 5:12 PM CDT for Payne County, Oklahoma. It was in force for 33 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: Oct 17, 2007, 5:12 PM CDT (22:12 UTC)
Expired: Oct 17, 2007, 5:45 PM CDT
In force: 33 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

County Payne County, OK

The radar

The Norman radar (KTLX), 87 km from the middle of the area, began a volume at 22:14 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
Oct 17, 2:25 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 10.2 hours before the alert went out and 103 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: 719 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 476 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 367 m²/s²
0-3 km storm-relative helicity: 396 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 5.9

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 Oct 17, 3:00 PM CDT, 2 hours 12 minutes earlier.

Area forecast discussion, Oct 17, 3:00 PM CDT, 2 hours 12 minutes before

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Hazardous weather outlook, Oct 17, 12:15 PM CDT, 4 hours 57 minutes before

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In the hours before

Local storm report, Oct 17, 4:05 PM CDT, 1 hour 7 minutes before

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Local storm report, Oct 17, 4:14 PM CDT, 58 minutes before

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Local storm report, Oct 17, 4:31 PM CDT, 41 minutes before

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Local storm report, Oct 17, 4:41 PM CDT, 31 minutes before

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Special weather statement, Oct 17, 4:53 PM CDT, 19 minutes before

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Local storm report, Oct 17, 5:11 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
Oct 17, 3:49 AM CDT	Severe Thunderstorm Warning	OUN	Woods, Woodward	26 min
Oct 17, 4:48 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Grant, Major	27 min
Oct 17, 8:02 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Custer	43 min
Oct 17, 9:11 AM CDT	Severe Thunderstorm Warning	OUN	Kingfisher	49 min
Oct 17, 9:24 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian	25 min
Oct 17, 9:24 AM CDT	Severe Thunderstorm Warning	OUN	Garfield, Logan	51 min
Oct 17, 9:34 AM CDT	Severe Thunderstorm Warning	OUN	Canadian, Kingfisher	41 min
Oct 17, 10:00 AM CDT	Severe Thunderstorm Warning	OUN	Kay, Noble, Payne	45 min
Oct 17, 10:04 AM CDT	Severe Thunderstorm Warning	OUN	Washita	26 min
Oct 17, 12:29 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain, Oklahoma	46 min
Oct 17, 2:07 PM CDT	River Flood Warning	OUN	Blaine, Caddo, Canadian, Custer	20 hr
Oct 17, 2:11 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey	49 min
Oct 17, 2:40 PM CDT	Severe Thunderstorm Warning	OUN	Major, Woodward	50 min
Oct 17, 2:50 PM CDT	Severe Thunderstorm Warning	OUN	Woods	40 min
Oct 17, 3:00 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey	45 min
Oct 17, 3:18 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady, Oklahoma	42 min
Oct 17, 3:24 PM CDT	Severe Thunderstorm Warning	OUN	Major	51 min
Oct 17, 3:35 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa	40 min
Oct 17, 3:38 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher	52 min
Oct 17, 3:43 PM CDT	Severe Thunderstorm Warning	OUN	Blaine	32 min
Oct 17, 3:57 PM CDT	Severe Thunderstorm Warning	OUN	Logan, Oklahoma	48 min
Oct 17, 3:58 PM CDT	Severe Thunderstorm Warning	OUN	Garfield	47 min
Oct 17, 4:08 PM CDT	Severe Thunderstorm Warning	OUN	Grant	52 min
Oct 17, 4:33 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan, Payne	42 min
Oct 17, 4:44 PM CDT	Severe Thunderstorm Warning	OUN	Logan, Noble	46 min
Oct 17, 5:03 PM CDT	Severe Thunderstorm Warning	OUN	Kay	42 min
Oct 17, 6:21 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	39 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2007 Every severe thunderstorm warning in 2007

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.