Alert archive / Arkansas / Mesoscale Discussions in 2013
Mesoscale Discussion 429
The Storm Prediction Center issued this mesoscale discussion at Apr 10, 2013, 3:01 PM CDT for 53 counties in Arkansas; 16 counties in Illinois; 28 counties in Missouri. It was in force for 119 min.
The area
The outline as issued.
The facts
- Issued
- Apr 10, 2013, 3:01 PM CDT (20:01 UTC)
- Expired
- Apr 10, 2013, 5:00 PM CDT
- In force
- 119 min
- Issued by
- the Storm Prediction Center
All 97 counties
Arkansas County, AR, Ashley County, AR, Baxter County, AR, Bradley County, AR, Calhoun County, AR, Clark County, AR, Clay County, AR, Cleburne County, AR, Cleveland County, AR, Columbia County, AR, Conway County, AR, Craighead County, AR, Cross County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Faulkner County, AR, Fulton County, AR, Garland County, AR, Grant County, AR, Greene County, AR, Hempstead County, AR, Hot Spring County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Jefferson County, AR, Lafayette County, AR, Lawrence County, AR, Lee County, AR, Lincoln County, AR, Lonoke County, AR, Miller County, AR, Monroe County, AR, Nevada County, AR, Ouachita County, AR, Perry County, AR, Phillips County, AR, Pike County, AR, Poinsett County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Searcy County, AR, Sharp County, AR, St. Francis County, AR, Stone County, AR, Union County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Alexander County, IL, Clay County, IL, Clinton County, IL, Franklin County, IL, Jackson County, IL, Jefferson County, IL, Marion County, IL, Monroe County, IL, Perry County, IL, Randolph County, IL, Richland County, IL, Saint Clair County, IL, Union County, IL, Washington County, IL, Wayne County, IL, Williamson County, IL, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, City of Saint Louis, MO, Crawford County, MO, Dent County, MO, Dunklin County, MO, Franklin County, MO, Howell County, MO, Iron County, MO, Jefferson County, MO, Madison County, MO, Oregon County, MO, Ozark 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, Texas County, MO, Washington County, MO, Wayne County, MO
The radar
The Memphis radar (KNQA), 152 km from the middle of the area, began a volume at 20:03 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
Little Rock, AR (KLZK), launched 12:00Z, 8.0 hours before the alert went out and 190 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.
- Mixed-layer CAPE
- 2433 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 471 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 186 m²/s²
- 0-3 km storm-relative helicity
- 279 m²/s²
- Significant tornado parameter
- 1.9
- Supercell composite
- 10.9
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 9:01 PM CDT | Mesoscale Discussion | SPC | Benton, Carroll, Crawford, Madison, Sebastian, Washington | 89 min |
| Apr 10, 1:03 PM CDT | Mesoscale Discussion | SPC | Arkansas, Baxter, Bradley, Calhoun, Clark, Clay and 50 more | 117 min |
| Apr 10, 1:20 PM CDT | Tornado Watch | SPC | Arkansas, Ashley, Baxter, Bradley, Calhoun, Chicot and 56 more | 10 hr |
| Apr 10, 5:42 PM CDT | Tornado Watch | SPC | Ashley, Chicot, Union | 7 hr |
| Apr 10, 6:09 PM CDT | Mesoscale Discussion | SPC | Arkansas, Baxter, Bradley, Calhoun, Clay, Cleburne and 33 more | 96 min |
| Apr 10, 12:36 PM CDT | Mesoscale Discussion | SPC | Bond, Champaign, Christian, Clark, Coles, Crawford and 11 more | 84 min |
| Apr 10, 12:53 PM CDT | Severe Thunderstorm Watch | SPC | Champaign, Clark, Clay, Coles, Crawford, Cumberland and 10 more | 7 hr |
| Apr 10, 1:46 PM CDT | Tornado Watch | SPC | Alexander, Bond, Clinton, Edwards, Fayette, Franklin and 17 more | 7 hr |
| Apr 10, 2:59 PM CDT | Mesoscale Discussion | SPC | Clark, Clay, Coles, Crawford, Cumberland, Douglas and 5 more | 61 min |
| Apr 10, 6:52 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Calhoun, Cass, Champaign, Christian and 33 more | 7 hr |
| Apr 9, 8:41 PM CDT | Mesoscale Discussion | SPC | Atchison | 64 min |
| Apr 9, 11:27 PM CDT | Mesoscale Discussion | SPC | Atchison | 63 min |
Nearby
Mesoscale Discussions in Arkansas, 2013Mesoscale Discussions in Missouri, 2013Mesoscale Discussions in Illinois, 2013Every mesoscale discussion in 2013
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.