Alert archive / Missouri / Mesoscale Discussions in 2005

Mesoscale Discussion 76

January 12, 20054 states

The Storm Prediction Center issued this mesoscale discussion at Jan 12, 2005, 9:28 PM CST for 4 states. It was in force for 32 min.

The area

The outline as issued.

The facts

Issued: Jan 12, 2005, 9:28 PM CST (03:28 UTC)
Expired: Jan 12, 2005, 10:00 PM CST
In force: 32 min
Issued by: the Storm Prediction Center

All 51 counties

Clay County, AR, Cleburne County, AR, Craighead County, AR, Fulton County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Lawrence County, AR, Randolph County, AR, Sharp County, AR, Alexander County, IL, Bond County, IL, Clinton County, IL, Fayette County, IL, Jackson County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Monroe County, IL, Montgomery County, IL, Perry County, IL, Randolph County, IL, Saint Clair County, IL, Union County, IL, Washington County, IL, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, City of Saint Louis, MO, Dunklin County, MO, Iron County, MO, Jefferson County, MO, Madison County, MO, New Madrid County, MO, Oregon County, MO, Pemiscot County, MO, Perry 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, Washington County, MO, Wayne County, MO, Lake County, TN

The radar

The St Louis radar (KLSX), 99 km from the middle of the area, began a volume at 03:32 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, 3.5 hours before the alert went out and 293 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: 170 J/kg
Mixed-layer CIN: -123 J/kg
Mixed-layer LCL: 924 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 217 m²/s²
0-3 km storm-relative helicity: 221 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.3

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
Jan 12, 6:02 PM CST	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Crawford, Franklin and 9 more	88 min
Jan 12, 7:52 PM CST	Mesoscale Discussion	SPC	Clark, Conway, Franklin, Garland, Hempstead, Howard and 15 more	83 min
Jan 12, 10:16 PM CST	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Calhoun, Clark, Clay and 44 more	59 min
Jan 12, 10:50 PM CST	Severe Thunderstorm Watch	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleburne and 27 more	5 hr
Jan 13, 2:25 AM CST	Tornado Watch	SPC	Chicot	7 hr
Jan 12, 7:34 PM CST	Mesoscale Discussion	SPC	Brown, Bureau, Cass, Cook, DeKalb, DeWitt and 24 more	86 min
Jan 12, 9:45 PM CST	Severe Thunderstorm Watch	SPC	Alexander, Bond, Clinton, Effingham, Fayette, Greene and 14 more	5 hr
Jan 13, 1:02 AM CST	Mesoscale Discussion	SPC	Alexander, Bond, Clay, Clinton, Coles, Cumberland and 13 more	88 min
Jan 13, 6:51 AM CST	Mesoscale Discussion	SPC	Adams, Brown, Calhoun, Cass, Fulton, Greene and 15 more	4 hr
Jan 13, 11:58 AM CST	Mesoscale Discussion	SPC	Bond, Calhoun, Cass, Champaign, Christian, Clark and 45 more	5 hr
Jan 12, 6:50 PM CST	Mesoscale Discussion	SPC	Adair, Caldwell, Carroll, Cass, Jackson, Lafayette and 6 more	4 hr
Jan 13, 7:15 AM CST	Severe Thunderstorm Watch	SPC	Bedford, Cannon, Cheatham, Clay, Coffee, Davidson and 26 more	6 hr
Jan 13, 9:53 AM CST	Mesoscale Discussion	SPC	Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 41 more	2 hr
Jan 13, 11:25 AM CST	Severe Thunderstorm Watch	SPC	Anderson, Bledsoe, Blount, Bradley, Campbell, Claiborne and 26 more	6 hr

Nearby

Mesoscale Discussions in Missouri, 2005 Mesoscale Discussions in Illinois, 2005 Mesoscale Discussions in Arkansas, 2005 Every mesoscale discussion in 2005

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.