Alert archive / Arkansas / Mesoscale Discussions in 2006

Mesoscale Discussion 443

April 6, 200612 counties in Arkansas; 5 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Apr 6, 2006, 3:29 PM CDT for 12 counties in Arkansas; 5 counties in Missouri. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: Apr 6, 2006, 3:29 PM CDT (20:29 UTC)
Expired: Apr 6, 2006, 5:00 PM CDT
In force: 91 min
Issued by: the Storm Prediction Center

Counties Baxter County, AR, Cleburne County, AR, Conway County, AR, Fulton County, AR, Independence County, AR, Izard County, AR, Marion County, AR, Pope County, AR, Searcy County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, Douglas County, MO, Howell County, MO, Ozark County, MO, Texas County, MO, Wright County, MO

The radar

The Little Rock radar (KLZK), 157 km from the middle of the area, began a volume at 20:31 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.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 8.5 hours before the alert went out and 170 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: 293 J/kg
Mixed-layer CIN: -508 J/kg
Mixed-layer LCL: 1046 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 378 m²/s²
0-3 km storm-relative helicity: 394 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Apr 6, 11:03 AM CDT	Mesoscale Discussion	SPC	Benton, Boone, Carroll, Crawford, Franklin, Garland and 17 more	117 min
Apr 6, 12:12 PM CDT	Severe Thunderstorm Watch	SPC	Baxter, Boone, Carroll, Cleburne, Conway, Franklin and 15 more	4 hr
Apr 6, 4:21 PM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Cleburne, Conway and 24 more	84 min
Apr 6, 4:41 PM CDT	Tornado Watch	SPC	Baxter, Benton, Boone, Carroll, Cleburne, Conway and 24 more	7 hr
Apr 5, 10:36 PM CDT	Mesoscale Discussion	SPC	Adair, Audrain, Boone, Caldwell, Callaway, Carroll and 30 more	84 min
Apr 5, 11:09 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Audrain, Boone, Callaway, Chariton, Clark and 30 more	4 hr
Apr 6, 6:01 AM CDT	Mesoscale Discussion	SPC	Andrew, Atchison, Buchanan, Cass, Clay, Clinton and 4 more	119 min
Apr 6, 11:19 AM CDT	Mesoscale Discussion	SPC	Bollinger, Cape Girardeau, Clark, Franklin, Iron, Jefferson and 18 more	56 min
Apr 6, 4:53 PM CDT	Mesoscale Discussion	SPC	Andrew, Barry, Barton, Bates, Benton, Buchanan and 51 more	97 min
Apr 6, 5:54 PM CDT	Tornado Watch	SPC	Barry, Barton, Bates, Benton, Camden, Cass and 33 more	7 hr

Nearby

Mesoscale Discussions in Arkansas, 2006 Mesoscale Discussions in Missouri, 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.