Alert archive / Missouri / Mesoscale Discussions in 2009

Mesoscale Discussion 1018

June 10, 20095 states

The Storm Prediction Center issued this mesoscale discussion at Jun 10, 2009, 5:20 AM CDT for 5 states. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued: Jun 10, 2009, 5:20 AM CDT (10:20 UTC)
Expired: Jun 10, 2009, 6:15 AM CDT
In force: 55 min
Issued by: the Storm Prediction Center

All 55 counties

Clay County, AR, Fulton County, AR, Greene County, AR, Randolph County, AR, Alexander County, IL, Hardin County, IL, Jackson County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Union County, IL, Williamson County, IL, Ballard County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Trigg County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Dunklin County, MO, Howell County, MO, Iron County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Oregon County, MO, Pemiscot County, MO, Perry County, MO, Reynolds County, MO, Ripley County, MO, Scott County, MO, Shannon County, MO, Stoddard County, MO, Texas County, MO, Wayne County, MO, Benton County, TN, Carroll County, TN, Dyer County, TN, Gibson County, TN, Henry County, TN, Lake County, TN, Obion County, TN, Stewart County, TN, Weakley County, TN

The radar

The Paducah radar (KPAH), 111 km from the middle of the area, began a volume at 10:23 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, 10.3 hours before the alert went out and 231 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, 4:41 AM CDT	Mesoscale Discussion	SPC	Crittenden, Cross, Lee, Phillips, Poinsett, St. Francis	34 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, 3:13 PM CDT	Mesoscale Discussion	SPC	Bond, Clark, Clay, Clinton, Crawford, Cumberland and 17 more	92 min
Jun 10, 12:30 PM CDT	Mesoscale Discussion	SPC	Barton, Benton, Camden, Cedar, Cole, Crawford and 20 more	90 min
Jun 10, 4:51 PM CDT	Mesoscale Discussion	SPC	Barry, Barton, Bates, Benton, Callaway, Camden and 35 more	84 min
Jun 10, 5:15 PM CDT	Tornado Watch	SPC	Audrain, Barry, Barton, Bates, Benton, Boone and 55 more	7 hr
Jun 10, 9:04 AM CDT	Mesoscale Discussion	SPC	Chester, Crockett, Dyer, Fayette, Gibson, Hardeman 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 Missouri, 2009 Mesoscale Discussions in Kentucky, 2009 Mesoscale Discussions in Illinois, 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.