Alert archive / Oklahoma / Mesoscale Discussions in 2006

Mesoscale Discussion 374

March 30, 2006Franklin County, Sebastian County, Arkansas; 5 counties in Oklahoma; Fannin County, Grayson County, Lamar County, Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 30, 2006, 11:34 PM CST for Franklin County, Sebastian County, Arkansas; 5 counties in Oklahoma; Fannin County, Grayson County, Lamar County, Texas. It was in force for 26 min.

The area

The outline as issued.

The facts

Issued: Mar 30, 2006, 11:34 PM CST (05:34 UTC)
Expired: Mar 31, 2006, 12:00 AM CST
In force: 26 min
Issued by: the Storm Prediction Center

Counties Franklin County, AR, Sebastian County, AR, Atoka County, OK, Bryan County, OK, Choctaw County, OK, LeFlore County, OK, Pushmataha County, OK, Fannin County, TX, Grayson County, TX, Lamar County, TX

The radar

The Western Arkansas radar (KSRX), 75 km from the middle of the area, began a volume at 05:35 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 00:00Z, 5.6 hours before the alert went out and 232 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: 263 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 1549 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 138 m²/s²
0-3 km storm-relative helicity: 220 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.7

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 30, 7:48 PM CST	Mesoscale Discussion	SPC	Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more	117 min
Mar 30, 9:42 PM CST	Tornado Watch	SPC	Baxter, Boone, Fulton, Izard, Johnson, Logan and 6 more	5 hr
Mar 31, 1:13 AM CST	Mesoscale Discussion	SPC	Baxter, Boone, Carroll, Clay, Cleburne, Conway and 18 more	62 min
Mar 31, 1:58 PM CST	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Chicot, Clay, Cleburne and 32 more	92 min
Mar 31, 4:53 PM CST	Tornado Watch	SPC	Craighead, Crittenden, Cross, Lee, Mississippi, Phillips and 2 more	5 hr
Mar 31, 3:41 PM CST	Mesoscale Discussion	SPC	Coke, Concho, Irion, Menard, Reagan, Runnels and 3 more	94 min

Nearby

Mesoscale Discussions in Oklahoma, 2006 Mesoscale Discussions in Texas, 2006 Mesoscale Discussions in Arkansas, 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.