Alert archive / Missouri / Mesoscale Discussions in 2007

Mesoscale Discussion 426

April 3, 20074 states

The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2007, 2:25 PM CDT for 4 states. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued: Apr 3, 2007, 2:25 PM CDT (19:25 UTC)
Expired: Apr 3, 2007, 3:30 PM CDT
In force: 65 min
Issued by: the Storm Prediction Center

All 102 counties

Alexander County, IL, Bond County, IL, Clay County, IL, Clinton County, IL, Crawford County, IL, Edwards County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jasper County, IL, Jefferson County, IL, Johnson County, IL, Lawrence County, IL, Madison County, IL, Marion County, IL, Massac County, IL, Monroe County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Randolph County, IL, Richland County, IL, Saint Clair County, IL, Saline County, IL, Union County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Gibson County, IN, Pike County, IN, Posey County, IN, Vanderburgh County, IN, Warrick County, IN, Ballard County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Christian County, KY, Crittenden County, KY, Graves County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Muhlenberg County, KY, Todd County, KY, Trigg County, KY, Union County, KY, Webster County, KY, Barry County, MO, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Christian County, MO, City of Saint Louis, MO, Crawford County, MO, Dent County, MO, Douglas County, MO, Franklin County, MO, Gasconade County, MO, Greene County, MO, Howell County, MO, Iron County, MO, Jefferson County, MO, Laclede County, MO, Madison County, MO, Maries County, MO, McDonald County, MO, Mississippi County, MO, New Madrid County, MO, Oregon County, MO, Osage County, MO, Ozark County, MO, Perry County, MO, Phelps County, MO, Pulaski County, MO, Reynolds County, MO, Ripley County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Scott County, MO, Shannon County, MO, Stoddard County, MO, Stone County, MO, Taney County, MO, Texas County, MO, Warren County, MO, Washington County, MO, Wayne County, MO, Webster County, MO, Wright County, MO

The radar

The St Louis radar (KLSX), 122 km from the middle of the area, began a volume at 19:26 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

Springfield, MO (KSGF), launched 12:00Z, 7.4 hours before the alert went out and 285 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: 1571 J/kg
Mixed-layer CIN: -171 J/kg
Mixed-layer LCL: 930 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 275 m²/s²
0-3 km storm-relative helicity: 294 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.6

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
Apr 2, 9:22 PM CDT	Severe Thunderstorm Watch	SPC	Carroll, Jo Daviess, Rock Island, Stephenson, Whiteside	8 hr
Apr 2, 11:33 PM CDT	Mesoscale Discussion	SPC	Carroll, Jo Daviess, Ogle, Stephenson, Winnebago	57 min
Apr 3, 1:27 AM CDT	Mesoscale Discussion	SPC	Carroll, Jo Daviess, Rock Island, Stephenson, Whiteside	93 min
Apr 3, 4:05 AM CDT	Mesoscale Discussion	SPC	Adams, Brown, Bureau, Cass, Fulton, Hancock and 19 more	55 min
Apr 3, 4:19 AM CDT	Severe Thunderstorm Watch	SPC	Adams, Brown, Bureau, Fulton, Hancock, Henderson and 16 more	6 hr
Apr 3, 7:17 AM CDT	Mesoscale Discussion	SPC	Adams, Brown, Calhoun, Cass, Fulton, Greene and 15 more	88 min
Apr 3, 9:08 AM CDT	Mesoscale Discussion	SPC	Bond, Champaign, Christian, Clark, Clay, Clinton and 26 more	67 min
Apr 3, 9:46 AM CDT	Mesoscale Discussion	SPC	Bond, Calhoun, Christian, Clark, Clay, Clinton and 37 more	29 min
Apr 3, 9:48 AM CDT	Severe Thunderstorm Watch	SPC	Bond, Calhoun, Cass, Champaign, Christian, Clark and 32 more	6 hr
Apr 3, 11:04 AM CDT	Mesoscale Discussion	SPC	Alexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 11 more	26 min
Apr 3, 11:51 AM CDT	Tornado Watch	SPC	Alexander, Bond, Clark, Clay, Clinton, Crawford and 30 more	8 hr
Apr 3, 1:10 PM CDT	Mesoscale Discussion	SPC	Adams, Allen, Bartholomew, Blackford, Boone, Brown and 43 more	65 min
Apr 3, 1:33 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Allen, Bartholomew, Blackford, Boone, Brown and 53 more	7 hr
Apr 3, 3:23 PM CDT	Mesoscale Discussion	SPC	Bartholomew, Blackford, Brown, Clark, Crawford, Dearborn and 33 more	67 min
Apr 3, 2:15 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Barren, Bullitt, Butler, Clinton, Cumberland and 12 more	6 hr
Apr 3, 5:05 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Anderson, Bath, Bell, Bourbon, Boyd and 60 more	5 hr
Apr 3, 5:23 PM CDT	Mesoscale Discussion	SPC	Allen, Barren, Breckinridge, Butler, Cumberland, Edmonson and 11 more	2 hr
Apr 3, 6:15 PM CDT	Mesoscale Discussion	SPC	Allen, Barren, Butler, Caldwell, Calloway, Christian and 16 more	60 min
Apr 2, 8:05 PM CDT	Mesoscale Discussion	SPC	Atchison, Harrison, Mercer, Nodaway, Putnam, Schuyler and 1 more	115 min
Apr 2, 11:40 PM CDT	Mesoscale Discussion	SPC	Andrew, Atchison, Buchanan, DeKalb, Gentry, Harrison and 3 more	65 min
Apr 3, 12:03 AM CDT	Severe Thunderstorm Watch	SPC	Adair, Andrew, Atchison, Buchanan, Caldwell, Clinton and 14 more	7 hr
Apr 3, 2:22 AM CDT	Mesoscale Discussion	SPC	Adair, Andrew, Atchison, Buchanan, Caldwell, Clinton and 14 more	53 min
Apr 3, 4:28 AM CDT	Mesoscale Discussion	SPC	Carroll, Cass, Chariton, Clay, Cole, Cooper and 12 more	62 min
Apr 3, 7:37 AM CDT	Severe Thunderstorm Watch	SPC	Audrain, Bates, Benton, Boone, Callaway, Camden and 30 more	8 hr
Apr 3, 2:17 PM CDT	Mesoscale Discussion	SPC	Dunklin, Pemiscot	118 min
Apr 3, 3:12 PM CDT	Tornado Watch	SPC	Dunklin, Pemiscot	7 hr

Nearby

Mesoscale Discussions in Missouri, 2007 Mesoscale Discussions in Illinois, 2007 Mesoscale Discussions in Kentucky, 2007 Every mesoscale discussion in 2007

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.