Alert archive / Mississippi / Mesoscale Discussions in 2009

Mesoscale Discussion 1017

June 10, 20096 counties in Arkansas; 11 counties in Mississippi; Fayette County, Shelby County, Tipton County, Tennessee

The Storm Prediction Center issued this mesoscale discussion at Jun 10, 2009, 4:41 AM CDT for 6 counties in Arkansas; 11 counties in Mississippi; Fayette County, Shelby County, Tipton County, Tennessee. It was in force for 34 min.

The area

The outline as issued.

The facts

Issued: Jun 10, 2009, 4:41 AM CDT (09:41 UTC)
Expired: Jun 10, 2009, 5:15 AM CDT
In force: 34 min
Issued by: the Storm Prediction Center

Counties Crittenden County, AR, Cross County, AR, Lee County, AR, Phillips County, AR, Poinsett County, AR, St. Francis County, AR, Calhoun County, MS, Coahoma County, MS, DeSoto County, MS, Lafayette County, MS, Marshall County, MS, Panola County, MS, Quitman County, MS, Tallahatchie County, MS, Tate County, MS, Tunica County, MS, Yalobusha County, MS, Fayette County, TN, Shelby County, TN, Tipton County, TN

The radar

The Memphis radar (KNQA), 88 km from the middle of the area, began a volume at 09:43 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 00:00Z, 9.7 hours before the alert went out and 36 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: 1598 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 1271 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 158 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 4.1

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
Jun 9, 7:56 PM CDT	Severe Thunderstorm Watch	SPC	Clay, Craighead, Greene, Lawrence, Mississippi, Randolph	3 hr
Jun 9, 9:15 PM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Cleburne, Fulton and 8 more	60 min
Jun 9, 9:46 PM CDT	Severe Thunderstorm Watch	SPC	Baxter, Benton, Boone, Carroll, Conway, Fulton and 11 more	7 hr
Jun 9, 11:30 PM CDT	Mesoscale Discussion	SPC	Benton, Boone, Carroll, Madison, Marion, Newton and 2 more	60 min
Jun 10, 1:12 AM CDT	Mesoscale Discussion	SPC	Craighead, Crittenden, Cross, Faulkner, Greene, Independence and 13 more	33 min
Jun 10, 1:29 AM CDT	Severe Thunderstorm Watch	SPC	Arkansas, Cleburne, Crittenden, Cross, Faulkner, Independence and 12 more	3 hr
Jun 10, 2:26 AM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Cleburne, Conway and 12 more	64 min
Jun 10, 3:33 AM CDT	Mesoscale Discussion	SPC	Fulton	27 min
Jun 10, 5:20 AM CDT	Mesoscale Discussion	SPC	Clay, Fulton, Greene, Randolph	55 min
Jun 10, 3:46 PM CDT	Severe Thunderstorm Watch	SPC	Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more	6 hr
Jun 10, 6:17 PM CDT	Mesoscale Discussion	SPC	Baxter, Bradley, Calhoun, Clark, Cleburne, Cleveland and 44 more	58 min
Jun 10, 6:37 PM CDT	Severe Thunderstorm Watch	SPC	Arkansas, Baxter, Boone, Bradley, Calhoun, Clark and 48 more	8 hr
Jun 10, 9:04 AM CDT	Mesoscale Discussion	SPC	Alcorn, Benton, Chickasaw, DeSoto, Itawamba, Lafayette and 8 more	86 min
Jun 10, 1:31 PM CDT	Mesoscale Discussion	SPC	Anderson, Blount, Bradley, Cocke, Jefferson, Knox and 7 more	89 min

Nearby

Mesoscale Discussions in Mississippi, 2009 Mesoscale Discussions in Arkansas, 2009 Mesoscale Discussions in Tennessee, 2009 Every mesoscale discussion in 2009

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.