Alert archive / Missouri / Mesoscale Discussions in 2014

Mesoscale Discussion 1242

July 1, 20145 states

The Storm Prediction Center issued this mesoscale discussion at Jul 1, 2014, 1:31 PM CDT for 5 states. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued: Jul 1, 2014, 1:31 PM CDT (18:31 UTC)
Expired: Jul 1, 2014, 2:30 PM CDT
In force: 59 min
Issued by: the Storm Prediction Center
Chance of a watch: 60%

All 59 counties

Baxter County, AR, Boone County, AR, Clay County, AR, Craighead County, AR, Fulton County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Lawrence County, AR, Marion County, AR, Newton County, AR, Randolph County, AR, Searcy County, AR, Sharp County, AR, Stone County, AR, Alexander County, IL, Franklin County, IL, Jackson County, IL, Johnson County, IL, Massac County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Saline County, IL, Union County, IL, Williamson County, IL, Ballard County, KY, Carlisle County, KY, Fulton County, KY, Hickman County, KY, McCracken County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Dent County, MO, Douglas County, MO, Dunklin County, MO, Howell County, MO, Iron County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Oregon County, MO, Ozark County, MO, Pemiscot County, MO, Perry County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Scott County, MO, Shannon County, MO, Stoddard County, MO, Taney County, MO, Texas County, MO, Wayne County, MO, Lake County, TN, Obion County, TN

The radar

The Memphis radar (KNQA), 185 km from the middle of the area, began a volume at 18:33 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.

Severe Thunderstorm Watch 383Jul 1, 2:10 PM CDT

The nearest sounding before it

Little Rock, AR (KBYH), launched 12:00Z, 6.5 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: 403 J/kg
Mixed-layer CIN: -418 J/kg
Mixed-layer LCL: 1533 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: -70 m²/s²
0-3 km storm-relative helicity: 9 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Jul 1, 2:07 PM CDT	Severe Thunderstorm Watch	SPC	Baxter, Clay, Fulton, Greene, Izard, Lawrence and 3 more	7 hr
Jul 1, 4:29 PM CDT	Mesoscale Discussion	SPC	Crawford, Franklin, Johnson, Logan, Madison, Newton and 4 more	3 hr
Jul 1, 6:13 PM CDT	Mesoscale Discussion	SPC	Clay	92 min
Jun 30, 7:26 PM CDT	Mesoscale Discussion	SPC	Bureau, Fulton, Hancock, Henderson, Henry, Knox and 13 more	2 hr
Jun 30, 7:47 PM CDT	Mesoscale Discussion	SPC	Kankakee	88 min
Jun 30, 7:48 PM CDT	Mesoscale Discussion	SPC	Hancock	57 min
Jun 30, 8:44 PM CDT	Mesoscale Discussion	SPC	Bureau, Cook, DeKalb, DuPage, Grundy, Iroquois and 12 more	31 min
Jun 30, 9:01 PM CDT	Severe Thunderstorm Watch	SPC	Cass, Champaign, Cook, DeWitt, Douglas, DuPage and 31 more	6 hr
Jun 30, 9:47 PM CDT	Mesoscale Discussion	SPC	DuPage, Ford, Grundy, Iroquois, Kankakee, Kendall and 9 more	88 min
Jun 30, 10:11 PM CDT	Mesoscale Discussion	SPC	Champaign, Douglas, Edgar, Moultrie, Piatt, Vermilion	2 hr
Jun 30, 10:14 PM CDT	Mesoscale Discussion	SPC	Adams	61 min
Jun 30, 10:22 PM CDT	Mesoscale Discussion	SPC	Kankakee, Will	53 min
Jun 30, 11:31 PM CDT	Mesoscale Discussion	SPC	Champaign, DeWitt, Logan, Macon, Menard, Piatt and 2 more	89 min
Jul 1, 1:56 AM CDT	Mesoscale Discussion	SPC	Boone, Bracken, Campbell, Carroll, Fleming, Gallatin and 7 more	64 min
Jul 1, 4:43 PM CDT	Mesoscale Discussion	SPC	Boone, Bracken, Breckinridge, Bullitt, Campbell, Carroll and 18 more	92 min

Nearby

Mesoscale Discussions in Missouri, 2014 Mesoscale Discussions in Arkansas, 2014 Mesoscale Discussions in Illinois, 2014 Every mesoscale discussion in 2014

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.