Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 313, NWS Norman, OK

April 23, 2008Pottawatomie County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Apr 23, 2008, 6:55 PM CDT for Pottawatomie County, Oklahoma. It was in force for 32 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, 2008, 6:55 PM CDT (23:55 UTC)
Expired: Apr 23, 2008, 7:27 PM CDT
In force: 32 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

County Pottawatomie County, OK

The radar

The Norman radar (KTLX), 33 km from the middle of the area, began a volume at 23:58 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 nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 11.9 hours before the alert went out and 41 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: 2105 J/kg
Mixed-layer CIN: -99 J/kg
Mixed-layer LCL: 979 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 59 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

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 23, 3:37 PM CDT, 3 hours 18 minutes earlier.

Area forecast discussion, Apr 23, 3:37 PM CDT, 3 hours 18 minutes before

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In the hours before

Special weather statement, Apr 23, 5:42 PM CDT, 1 hour 13 minutes before

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Special weather statement, Apr 23, 5:44 PM CDT, 1 hour 11 minutes before

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Special weather statement, Apr 23, 6:02 PM CDT, 53 minutes before

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Special weather statement, Apr 23, 6:20 PM CDT, 35 minutes before

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Special weather statement, Apr 23, 6:35 PM CDT, 20 minutes before

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Local storm report, Apr 23, 6:44 PM CDT, 11 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 23, 7:47 AM CDT	Severe Thunderstorm Warning	OUN	Jackson, Kiowa, Tillman	43 min
Apr 23, 8:29 AM CDT	Severe Thunderstorm Warning	OUN	Kiowa, Washita	46 min
Apr 23, 9:14 AM CDT	Severe Thunderstorm Warning	OUN	Dewey	46 min
Apr 23, 9:28 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Washita	47 min
Apr 23, 10:00 AM CDT	Severe Thunderstorm Warning	OUN	Dewey, Major	45 min
Apr 23, 10:14 AM CDT	Severe Thunderstorm Warning	OUN	Blaine	46 min
Apr 23, 10:40 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey, Major	50 min
Apr 23, 10:47 AM CDT	Severe Thunderstorm Warning	OUN	Woods	43 min
Apr 23, 10:59 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Major	31 min
Apr 23, 11:17 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche	43 min
Apr 23, 11:29 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Grant, Major	61 min
Apr 23, 11:32 AM CDT	Severe Thunderstorm Warning	OUN	Grady	43 min
Apr 23, 12:06 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Roger Mills	39 min
Apr 23, 12:36 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper	39 min
Apr 23, 2:42 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Roger Mills	48 min
Apr 23, 5:24 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain	51 min
Apr 23, 6:01 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Grady, Oklahoma	44 min
Apr 23, 6:09 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Pottawatomie	51 min
Apr 23, 6:18 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher	42 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2008 Every severe thunderstorm warning in 2008

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.