Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 66, NWS Norman, OK

March 24, 20094 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Mar 24, 2009, 1:55 AM CDT for 4 counties in Oklahoma. It was in force for 54 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: Mar 24, 2009, 1:55 AM CDT (06:55 UTC)
Expired: Mar 24, 2009, 2:49 AM CDT
In force: 54 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

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

The radar

The Norman radar (KTLX), 54 km from the middle of the area, began a volume at 06:56 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
Mar 23, 11:43 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 6.9 hours before the alert went out and 69 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: 233 J/kg
Mixed-layer CIN: -179 J/kg
Mixed-layer LCL: 1276 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: 335 m²/s²
0-3 km storm-relative helicity: 387 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.5

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 Mar 24, 12:55 AM CDT, 1 hour earlier.

Area forecast discussion, Mar 24, 12:55 AM CDT, 1 hour before

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Hazardous weather outlook, Mar 24, 12:00 AM CDT, 1 hour 55 minutes before

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In the hours before

Special weather statement, Mar 24, 1:08 AM CDT, 47 minutes before

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Special weather statement, Mar 24, 1:11 AM CDT, 44 minutes before

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Special weather statement, Mar 24, 1:32 AM CDT, 23 minutes before

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Special weather statement, Mar 24, 1:33 AM CDT, 22 minutes before

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Local storm report, Mar 24, 1:35 AM CDT, 20 minutes before

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Special weather statement, Mar 24, 1:42 AM CDT, 13 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
Mar 23, 7:10 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Kiowa, Tillman	50 min
Mar 23, 7:10 PM CDT	Severe Thunderstorm Warning	OUN	Noble, Payne	50 min
Mar 23, 7:26 PM CDT	Severe Thunderstorm Warning	OUN	Comanche	64 min
Mar 23, 7:52 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Kiowa, Tillman	38 min
Mar 23, 7:56 PM CDT	Severe Thunderstorm Warning	OUN	Payne	24 min
Mar 23, 8:01 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Kingfisher, Logan, Oklahoma	44 min
Mar 23, 8:26 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Grady, Stephens	49 min
Mar 23, 8:47 PM CDT	Severe Thunderstorm Warning	OUN	Kiowa	43 min
Mar 23, 9:12 PM CDT	Severe Thunderstorm Warning	OUN	Grady, Stephens	48 min
Mar 23, 9:23 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Kiowa, Washita	52 min
Mar 23, 10:02 PM CDT	Areal Flood Advisory	OUN	Caddo, Kiowa	3 hr
Mar 23, 10:16 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Grady	59 min
Mar 23, 10:29 PM CDT	Severe Thunderstorm Warning	OUN	Washita	46 min
Mar 23, 10:52 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian	38 min
Mar 23, 11:03 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain	57 min
Mar 23, 11:23 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady	52 min
Mar 23, 11:53 PM CDT	Severe Thunderstorm Warning	OUN	Pottawatomie	31 min
Mar 24, 12:02 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain, Oklahoma	51 min
Mar 24, 12:16 AM CDT	Wind Advisory	OUN	Carter, Garvin, Jefferson, Johnston, Love, Marshall and 3 more	4 hr
Mar 24, 12:50 AM CDT	Areal Flood Advisory	OUN	Blaine, Caddo, Custer	115 min
Mar 24, 9:42 AM CDT	Severe Thunderstorm Warning	OUN	Coal, Hughes	33 min
Mar 24, 12:26 PM CDT	Wind Advisory	OUN	Alfalfa, Blaine, Dewey, Ellis, Garfield, Grant and 9 more	7 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2009 Every severe thunderstorm warning in 2009

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.