Alert archive / Arkansas / Mesoscale Discussions in 2006

Mesoscale Discussion 209

March 9, 200620 counties in Arkansas; 5 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Mar 9, 2006, 1:55 PM CST for 20 counties in Arkansas; 5 counties in Missouri. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Mar 9, 2006, 1:55 PM CST (19:55 UTC)
Expired: Mar 9, 2006, 4:00 PM CST
In force: 2 hr
Issued by: the Storm Prediction Center

All 25 counties

Clark County, AR, Cleburne County, AR, Faulkner County, AR, Fulton County, AR, Grant County, AR, Hot Spring County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Jefferson County, AR, Lawrence County, AR, Lonoke County, AR, Prairie County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Sharp County, AR, Stone County, AR, White County, AR, Woodruff County, AR, Carter County, MO, Oregon County, MO, Ripley County, MO, Shannon County, MO, Wayne County, MO

The radar

The Little Rock radar (KLZK), 109 km from the middle of the area, began a volume at 19:55 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

Little Rock, AR (KLZK), launched 12:00Z, 7.9 hours before the alert went out and 186 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: 4 J/kg
Mixed-layer CIN: -160 J/kg
Mixed-layer LCL: 1010 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 66 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
Mar 9, 1:14 AM CST	Severe Thunderstorm Watch	SPC	Baxter, Benton, Boone, Carroll, Cleburne, Crawford and 16 more	6 hr
Mar 9, 1:36 AM CST	Tornado Watch	SPC	Arkansas, Bradley, Calhoun, Clark, Cleveland, Columbia and 33 more	5 hr
Mar 9, 1:57 AM CST	Mesoscale Discussion	SPC	Polk, Scott, Sebastian	63 min
Mar 9, 5:48 AM CST	Tornado Watch	SPC	Ashley, Chicot, Columbia, Hempstead, Howard, Lafayette and 5 more	6 hr
Mar 9, 6:10 AM CST	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Clay, Cleburne and 30 more	95 min
Mar 9, 6:52 AM CST	Tornado Watch	SPC	Arkansas, Bradley, Calhoun, Clark, Clay, Cleburne and 39 more	6 hr
Mar 9, 10:30 AM CST	Mesoscale Discussion	SPC	Arkansas, Bradley, Clay, Cleveland, Craighead, Crittenden and 18 more	2 hr
Mar 9, 10:34 AM CST	Mesoscale Discussion	SPC	Benton, Boone, Carroll, Crawford, Franklin, Johnson and 7 more	116 min
Mar 9, 11:05 AM CST	Mesoscale Discussion	SPC	Chicot	85 min
Mar 9, 11:29 AM CST	Tornado Watch	SPC	Chicot	7 hr
Mar 9, 12:30 PM CST	Severe Thunderstorm Watch	SPC	Baxter, Benton, Boone, Carroll, Conway, Crawford and 20 more	6 hr
Mar 9, 3:06 PM CST	Mesoscale Discussion	SPC	Baxter, Boone, Conway, Marion, Newton, Perry and 3 more	84 min
Mar 9, 4:44 PM CST	Mesoscale Discussion	SPC	Clay, Craighead, Greene, Lawrence, Mississippi, Poinsett and 1 more	61 min
Mar 9, 5:18 PM CST	Tornado Watch	SPC	Clay, Craighead, Greene, Mississippi	3 hr
Mar 8, 7:04 PM CST	Mesoscale Discussion	SPC	Barton, Bates, Benton, Boone, Caldwell, Camden and 32 more	56 min
Mar 8, 8:22 PM CST	Mesoscale Discussion	SPC	Newton	53 min
Mar 8, 9:56 PM CST	Mesoscale Discussion	SPC	Barton, Bates, Cass, Cedar, Dade, Henry and 3 more	64 min
Mar 9, 12:55 PM CST	Tornado Watch	SPC	Mississippi, New Madrid, Pemiscot	6 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.