Alert archive / Missouri / Mesoscale Discussions in 2006

Mesoscale Discussion 269

March 12, 20064 states

The Storm Prediction Center issued this mesoscale discussion at Mar 12, 2006, 8:00 PM CST for 4 states. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Mar 12, 2006, 8:00 PM CST (02:00 UTC)
Expired: Mar 12, 2006, 9:30 PM CST
In force: 90 min
Issued by: the Storm Prediction Center

All 141 counties

Adams County, IL, Bond County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Champaign County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Effingham County, IL, Fayette County, IL, Ford County, IL, Fulton County, IL, Greene County, IL, Hancock County, IL, Iroquois County, IL, Jasper County, IL, Jefferson County, IL, Jersey County, IL, Lawrence County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Mason County, IL, McDonough County, IL, McLean County, IL, Menard County, IL, Monroe County, IL, Montgomery County, IL, Morgan County, IL, Moultrie County, IL, Piatt County, IL, Pike County, IL, Randolph County, IL, Richland County, IL, Saint Clair County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Shelby County, IL, Tazewell County, IL, Vermilion County, IL, Washington County, IL, Wayne County, IL, Benton County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clay County, IN, Clinton County, IN, Fountain County, IN, Greene County, IN, Hendricks County, IN, Montgomery County, IN, Morgan County, IN, Owen County, IN, Parke County, IN, Putnam County, IN, Sullivan County, IN, Tippecanoe County, IN, Vermillion County, IN, Vigo County, IN, Warren County, IN, White County, IN, Bourbon County, KS, Crawford County, KS, Linn County, KS, Adair County, MO, Audrain County, MO, Barton County, MO, Bates County, MO, Benton County, MO, Boone County, MO, Caldwell County, MO, Callaway County, MO, Camden County, MO, Carroll County, MO, Cass County, MO, Cedar County, MO, Chariton County, MO, City of Saint Louis, MO, Clark County, MO, Cole County, MO, Cooper County, MO, Crawford County, MO, Dade County, MO, Dallas County, MO, Dent County, MO, Franklin County, MO, Gasconade County, MO, Henry County, MO, Hickory County, MO, Howard County, MO, Iron County, MO, Jackson County, MO, Jasper County, MO, Jefferson County, MO, Johnson County, MO, Knox County, MO, Laclede County, MO, Lafayette County, MO, Lewis County, MO, Lincoln County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Maries County, MO, Marion County, MO, Miller County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Pettis County, MO, Phelps County, MO, Pike County, MO, Polk County, MO, Pulaski County, MO, Ralls County, MO, Randolph County, MO, Ray County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Saline County, MO, Shelby County, MO, St. Clair County, MO, Vernon County, MO, Warren County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 50 km from the middle of the area, began a volume at 02:03 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

Lincoln, IL (KILX), launched 00:00Z, 2.0 hours before the alert went out and 259 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: 730 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 565 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 286 m²/s²
0-3 km storm-relative helicity: 322 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 5.6

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 12, 6:28 PM CST	Mesoscale Discussion	SPC	Adams, Bond, Brown, Calhoun, Cass, Christian and 17 more	92 min
Mar 12, 7:15 PM CST	Mesoscale Discussion	SPC	Boone, Bureau, Carroll, DeKalb, DuPage, Grundy and 24 more	90 min
Mar 12, 7:28 PM CST	Severe Thunderstorm Watch	SPC	Carroll, Jo Daviess, Rock Island, Stephenson, Whiteside	7 hr
Mar 12, 8:42 PM CST	Tornado Watch	SPC	Adams, Bond, Boone, Brown, Bureau, Calhoun and 58 more	7 hr
Mar 12, 11:30 PM CST	Mesoscale Discussion	SPC	Adams, Bond, Brown, Calhoun, Cass, Champaign and 41 more	2 hr
Mar 12, 11:52 PM CST	Mesoscale Discussion	SPC	Carroll	83 min
Mar 13, 12:35 AM CST	Mesoscale Discussion	SPC	Alexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 11 more	85 min
Mar 13, 1:06 AM CST	Tornado Watch	SPC	Alexander, Clinton, Edwards, Franklin, Gallatin, Hamilton and 19 more	6 hr
Mar 13, 3:19 AM CST	Mesoscale Discussion	SPC	Champaign, Clark, Clay, Coles, Crawford, Cumberland and 9 more	86 min
Mar 13, 3:52 AM CST	Tornado Watch	SPC	Bond, Champaign, Clark, Clay, Coles, Crawford and 19 more	7 hr
Mar 13, 6:08 AM CST	Mesoscale Discussion	SPC	Alexander, Edwards, Gallatin, Hamilton, Hardin, Johnson and 7 more	97 min
Mar 12, 10:39 PM CST	Mesoscale Discussion	SPC	Allen, Carroll, Cass, Clinton, DeKalb, Elkhart and 18 more	96 min
Mar 12, 11:23 PM CST	Tornado Watch	SPC	Allen, Cass, DeKalb, Elkhart, Fulton, Huntington and 13 more	7 hr
Mar 13, 6:56 AM CST	Severe Thunderstorm Watch	SPC	Clark, Crawford, Dubois, Floyd, Gibson, Harrison and 9 more	4 hr
Mar 13, 9:39 AM CST	Mesoscale Discussion	SPC	Adams, Allen, Blackford, Boone, Carroll, Cass and 28 more	66 min
Mar 13, 9:44 AM CST	Tornado Watch	SPC	Adams, Allen, DeKalb, Elkhart, Huntington, Kosciusko and 7 more	5 hr
Mar 13, 10:22 AM CST	Severe Thunderstorm Watch	SPC	Clark, Dearborn, Floyd, Harrison, Jefferson, Ohio and 3 more	10 hr
Mar 13, 2:13 PM CST	Mesoscale Discussion	SPC	Clark, Dearborn, Jefferson, Ohio, Ripley, Switzerland	92 min
Mar 12, 9:13 PM CST	Mesoscale Discussion	SPC	Barry, Howell, McDonald, Newton, Ozark, Stone and 1 more	62 min
Mar 13, 2:44 AM CST	Mesoscale Discussion	SPC	Dunklin	91 min
Mar 13, 3:13 AM CST	Tornado Watch	SPC	Dunklin, Pemiscot	7 hr
Mar 13, 9:02 AM CST	Mesoscale Discussion	SPC	Dunklin, Pemiscot	58 min

Nearby

Mesoscale Discussions in Missouri, 2006 Mesoscale Discussions in Illinois, 2006 Mesoscale Discussions in Indiana, 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.