Alert archive / Oklahoma / Mesoscale Discussions in 2006

Mesoscale Discussion 366

March 30, 200621 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Mar 30, 2006, 2:46 PM CST for 21 counties in Oklahoma. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: Mar 30, 2006, 2:46 PM CST (20:46 UTC)
Expired: Mar 30, 2006, 4:45 PM CST
In force: 119 min
Issued by: the Storm Prediction Center

All 21 counties

Atoka County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Coal County, OK, Garvin County, OK, Grady County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, McClain County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Okfuskee County, OK, Oklahoma County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Stephens County, OK

The radar

The Norman radar (KTLX), 39 km from the middle of the area, began a volume at 20:48 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Tornado Watch 112Mar 30, 5:40 PM CST

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 8.8 hours before the alert went out and 33 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: 1250 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 612 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 261 m²/s²
0-3 km storm-relative helicity: 313 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 6.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 29, 11:16 PM CST	Mesoscale Discussion	SPC	Alfalfa, Beckham, Blaine, Caddo, Canadian, Carter and 27 more	119 min
Mar 30, 2:58 AM CST	Mesoscale Discussion	SPC	Beaver, Ellis, Harper, Woods, Woodward	2 hr
Mar 30, 7:07 AM CST	Mesoscale Discussion	SPC	Adair, Cherokee, Craig, Creek, Delaware, Haskell and 18 more	113 min
Mar 30, 8:42 AM CST	Tornado Watch	SPC	Adair, Alfalfa, Cherokee, Craig, Creek, Delaware and 18 more	9 hr
Mar 30, 9:42 AM CST	Mesoscale Discussion	SPC	Alfalfa, Blaine, Caddo, Canadian, Custer, Dewey and 8 more	93 min
Mar 30, 11:08 AM CST	Tornado Watch	SPC	Atoka, Blaine, Bryan, Caddo, Canadian, Carter and 24 more	7 hr
Mar 30, 12:33 PM CST	Mesoscale Discussion	SPC	Atoka, Canadian, Carter, Cleveland, Coal, Comanche and 17 more	117 min
Mar 30, 3:12 PM CST	Mesoscale Discussion	SPC	Kay, Nowata, Osage, Washington	63 min
Mar 30, 5:10 PM CST	Mesoscale Discussion	SPC	Atoka, Bryan, Carter, Choctaw, Coal, Haskell and 13 more	2 hr
Mar 30, 5:39 PM CST	Tornado Watch	SPC	Adair, Atoka, Bryan, Carter, Cherokee, Choctaw and 35 more	6 hr

Nearby

Mesoscale Discussions in Oklahoma, 2006 Every mesoscale discussion in 2006

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.