Alert archive / Arkansas / Mesoscale Discussions in 2008

Mesoscale Discussion 526

March 31, 200840 counties in Arkansas; 4 counties in Missouri; Bowie County, Red River County, Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 31, 2008, 5:28 PM CDT for 40 counties in Arkansas; 4 counties in Missouri; Bowie County, Red River County, Texas. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued: Mar 31, 2008, 5:28 PM CDT (22:28 UTC)
Expired: Mar 31, 2008, 6:30 PM CDT
In force: 62 min
Issued by: the Storm Prediction Center

All 46 counties

Clark County, AR, Clay County, AR, Cleburne County, AR, Conway County, AR, Craighead County, AR, Cross County, AR, Dallas County, AR, Faulkner County, AR, Garland County, AR, Grant County, AR, Greene County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Jefferson County, AR, Lafayette County, AR, Lawrence County, AR, Little River County, AR, Lonoke County, AR, Miller County, AR, Mississippi County, AR, Montgomery County, AR, Nevada County, AR, Perry County, AR, Pike County, AR, Poinsett County, AR, Prairie County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Sevier County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Yell County, AR, Butler County, MO, Dunklin County, MO, Ripley County, MO, Wayne County, MO, Bowie County, TX, Red River County, TX

The radar

The Little Rock radar (KLZK), 67 km from the middle of the area, began a volume at 22:29 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, 10.5 hours before the alert went out and 261 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: 640 J/kg
Mixed-layer CIN: -126 J/kg
Mixed-layer LCL: 596 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 336 m²/s²
0-3 km storm-relative helicity: 354 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 10.7

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 31, 8:44 AM CDT	Tornado Watch	SPC	Benton, Carroll, Crawford, Madison, Washington	7 hr
Mar 31, 10:30 AM CDT	Mesoscale Discussion	SPC	Benton, Boone, Carroll, Crawford, Madison, Washington	60 min
Mar 31, 3:04 PM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Crawford, Franklin and 13 more	26 min
Mar 31, 3:45 PM CDT	Tornado Watch	SPC	Baxter, Benton, Boone, Carroll, Crawford, Franklin and 16 more	7 hr
Mar 31, 6:12 PM CDT	Tornado Watch	SPC	Calhoun, Clark, Clay, Cleburne, Cleveland, Columbia and 34 more	7 hr
Mar 31, 3:31 AM CDT	Mesoscale Discussion	SPC	Andrew, Bates, Buchanan, Caldwell, Carroll, Cass and 23 more	59 min
Mar 31, 4:09 AM CDT	Severe Thunderstorm Watch	SPC	Andrew, Atchison, Buchanan, Caldwell, Clinton, Daviess and 9 more	3 hr
Mar 31, 5:59 AM CDT	Mesoscale Discussion	SPC	Andrew, Atchison, Buchanan, Caldwell, Carroll, Clinton and 14 more	91 min
Mar 31, 7:50 AM CDT	Mesoscale Discussion	SPC	Barton, Bates, Cedar, Dade, Jasper, Newton and 1 more	85 min
Mar 31, 1:09 PM CDT	Mesoscale Discussion	SPC	Adair, Caldwell, Carroll, Chariton, Clark, Clay and 22 more	2 hr
Mar 31, 1:10 PM CDT	Mesoscale Discussion	SPC	Crawford, Dent, Franklin, Gasconade, Iron, Jefferson and 16 more	35 min
Mar 31, 1:45 PM CDT	Tornado Watch	SPC	Audrain, Boone, Callaway, Cole, Crawford, Franklin and 17 more	6 hr
Mar 31, 12:20 PM CDT	Mesoscale Discussion	SPC	Archer, Bosque, Brown, Callahan, Clay, Coleman and 36 more	55 min
Mar 31, 2:00 PM CDT	Tornado Watch	SPC	Anderson, Bell, Bosque, Collin, Comanche, Cooke and 37 more	7 hr
Mar 31, 3:49 PM CDT	Mesoscale Discussion	SPC	Anderson, Bell, Bosque, Collin, Comanche, Cooke and 37 more	56 min

Nearby

Mesoscale Discussions in Arkansas, 2008 Mesoscale Discussions in Missouri, 2008 Mesoscale Discussions in Texas, 2008 Every mesoscale discussion in 2008

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.