Alert archive / Arkansas / Mesoscale Discussions in 2008

Mesoscale Discussion 769

May 2, 200811 counties in Arkansas; 5 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at May 2, 2008, 7:07 AM CDT for 11 counties in Arkansas; 5 counties in Missouri. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: May 2, 2008, 7:07 AM CDT (12:07 UTC)
Expired: May 2, 2008, 8:00 AM CDT
In force: 53 min
Issued by: the Storm Prediction Center

Counties Cleburne County, AR, Conway County, AR, Faulkner County, AR, Fulton County, AR, Hot Spring County, AR, Izard County, AR, Perry County, AR, Pulaski County, AR, Saline County, AR, Stone County, AR, Van Buren County, AR, Crawford County, MO, Dent County, MO, Franklin County, MO, Shannon County, MO, Warren County, MO

The radar

The Springfield radar (KSGF), 155 km from the middle of the area, began a volume at 12:08 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 249May 2, 8:45 AM CDT

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 0.1 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: 29 J/kg
Mixed-layer CIN: -385 J/kg
Mixed-layer LCL: 910 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 449 m²/s²
0-3 km storm-relative helicity: 489 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
May 2, 1:09 AM CDT	Tornado Watch	SPC	Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more	7 hr
May 2, 4:22 AM CDT	Mesoscale Discussion	SPC	Boone, Carroll, Crawford, Franklin, Johnson, Logan and 6 more	53 min
May 2, 5:00 AM CDT	Severe Thunderstorm Watch	SPC	Baxter, Boone, Clark, Cleburne, Conway, Faulkner and 25 more	5 hr
May 2, 8:49 AM CDT	Tornado Watch	SPC	Arkansas, Bradley, Calhoun, Clark, Clay, Cleburne and 43 more	6 hr
May 2, 10:20 AM CDT	Mesoscale Discussion	SPC	Arkansas, Calhoun, Clark, Clay, Cleveland, Craighead and 23 more	85 min
May 2, 12:12 PM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 18 more	2 hr
May 2, 1:54 PM CDT	Tornado Watch	SPC	Arkansas, Ashley, Bradley, Chicot, Crittenden, Cross and 8 more	6 hr
May 2, 3:35 PM CDT	Mesoscale Discussion	SPC	Arkansas, Crittenden, Cross, Desha, Drew, Lee and 4 more	85 min
May 2, 5:18 PM CDT	Tornado Watch	SPC	Columbia, Union	6 hr
May 1, 7:24 PM CDT	Mesoscale Discussion	SPC	Andrew, Bates, Buchanan, Caldwell, Cass, Clay and 12 more	66 min
May 1, 10:04 PM CDT	Mesoscale Discussion	SPC	Andrew, Atchison, Barton, Bates, Buchanan, Caldwell and 34 more	116 min
May 1, 11:29 PM CDT	Mesoscale Discussion	SPC	Adair, Andrew, Audrain, Barton, Bates, Benton and 59 more	91 min
May 2, 12:53 AM CDT	Tornado Watch	SPC	Adair, Andrew, Barry, Barton, Bates, Benton and 46 more	6 hr
May 2, 10:44 AM CDT	Tornado Watch	SPC	Mississippi, New Madrid, Scott, Stoddard	9 hr

Nearby

Mesoscale Discussions in Arkansas, 2008 Mesoscale Discussions in Missouri, 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.