Alert archive / Arkansas / Mesoscale Discussions in 2004

Mesoscale Discussion 1214

June 12, 200428 counties in Arkansas; 15 counties in Missouri; 8 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jun 12, 2004, 11:38 AM CDT for 28 counties in Arkansas; 15 counties in Missouri; 8 counties in Oklahoma. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 12, 2004, 11:38 AM CDT (16:38 UTC)
Expired: Jun 12, 2004, 1:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 51 counties

Baxter County, AR, Benton County, AR, Boone County, AR, Carroll County, AR, Clay County, AR, Cleburne County, AR, Conway County, AR, Craighead County, AR, Crawford County, AR, Franklin County, AR, Fulton County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Johnson County, AR, Lawrence County, AR, Madison County, AR, Marion County, AR, Newton County, AR, Poinsett County, AR, Pope County, AR, Randolph County, AR, Searcy County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, Washington County, AR, Barry County, MO, Butler County, MO, Carter County, MO, Dunklin County, MO, Howell County, MO, McDonald County, MO, New Madrid County, MO, Oregon County, MO, Ozark County, MO, Pemiscot County, MO, Ripley County, MO, Scott County, MO, Stoddard County, MO, Stone County, MO, Taney County, MO, Adair County, OK, Cherokee County, OK, Craig County, OK, Delaware County, OK, Mayes County, OK, Ottawa County, OK, Rogers County, OK, Sequoyah County, OK

The radar

The Springfield radar (KSGF), 129 km from the middle of the area, began a volume at 16:40 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

Springfield, MO (KSGF), launched 12:00Z, 4.6 hours before the alert went out and 135 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: 2508 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 749 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 4.2

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 12, 1:35 PM CDT	Severe Thunderstorm Watch	SPC	Clay, Craighead, Crittenden, Cross, Fulton, Greene and 11 more	5 hr
Jun 12, 3:10 PM CDT	Severe Thunderstorm Watch	SPC	Baxter, Benton, Boone, Carroll, Madison, Marion and 5 more	6 hr
Jun 12, 3:14 PM CDT	Mesoscale Discussion	SPC	Clay, Craighead, Crittenden, Cross, Fulton, Greene and 11 more	2 hr
Jun 12, 4:36 PM CDT	Mesoscale Discussion	SPC	Benton, Carroll	84 min
Jun 11, 11:34 PM CDT	Mesoscale Discussion	SPC	Buchanan, Caldwell, Carroll, Clay, Clinton, Daviess and 5 more	116 min
Jun 12, 2:18 AM CDT	Mesoscale Discussion	SPC	Barton, Bates, Benton, Camden, Cass, Cedar and 18 more	87 min
Jun 12, 10:30 AM CDT	Mesoscale Discussion	SPC	Atchison, Barton, Bates, Benton, Camden, Cass and 29 more	2 hr
Jun 12, 11:45 AM CDT	Tornado Watch	SPC	Andrew, Atchison, Buchanan, Gentry, Holt, Nodaway and 1 more	7 hr
Jun 12, 12:43 PM CDT	Mesoscale Discussion	SPC	Atchison	92 min
Jun 12, 3:51 PM CDT	Mesoscale Discussion	SPC	Bollinger, Cape Girardeau, Mississippi, Perry, Sainte Genevieve, Scott	84 min
Jun 12, 4:15 PM CDT	Severe Thunderstorm Watch	SPC	Cape Girardeau, Mississippi, Scott	5 hr
Jun 12, 5:00 PM CDT	Mesoscale Discussion	SPC	Andrew, Atchison, Buchanan, Gentry, Holt, Nodaway and 1 more	90 min
Jun 12, 6:08 PM CDT	Mesoscale Discussion	SPC	Cape Girardeau, Mississippi, Scott	37 min
Jun 12, 6:15 PM CDT	Tornado Watch	SPC	Adair, Andrew, Atchison, Bates, Benton, Buchanan and 31 more	5 hr
Jun 11, 8:17 PM CDT	Mesoscale Discussion	SPC	Comanche, Cotton, Jackson, Tillman	88 min
Jun 12, 1:12 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Caddo, Canadian, Carter, Cleveland and 33 more	2 hr
Jun 12, 2:40 PM CDT	Tornado Watch	SPC	Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 29 more	8 hr
Jun 12, 5:37 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 28 more	83 min

Nearby

Mesoscale Discussions in Arkansas, 2004 Mesoscale Discussions in Missouri, 2004 Mesoscale Discussions in Oklahoma, 2004 Every mesoscale discussion in 2004

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.