Alert archive / Mississippi / Mesoscale Discussions in 2012
Mesoscale Discussion 1422
The Storm Prediction Center issued this mesoscale discussion at Jul 6, 2012, 6:15 PM CDT for 5 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 6, 2012, 6:15 PM CDT (23:15 UTC)
- Expired
- Jul 6, 2012, 8:15 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 64 counties
Greene County, AL, Pickens County, AL, Sumter County, AL, Arkansas County, AR, Chicot County, AR, Crittenden County, AR, Cross County, AR, Desha County, AR, Drew County, AR, Lee County, AR, Monroe County, AR, Phillips County, AR, St. Francis County, AR, East Carroll Parish, LA, Attala County, MS, Benton County, MS, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Clay County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Kemper County, MS, Lafayette County, MS, Lauderdale County, MS, Leake County, MS, Leflore County, MS, Lowndes County, MS, Madison County, MS, Marshall County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Panola County, MS, Pontotoc County, MS, Quitman County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tunica County, MS, Union County, MS, Warren County, MS, Washington County, MS, Webster County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS, Fayette County, TN, Haywood County, TN, Shelby County, TN, Tipton County, TN
The radar
The Columbus AFB radar (KGWX), 115 km from the middle of the area, began a volume at 23:18 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
Little Rock, AR (KLZK), launched 12:00Z, 11.3 hours before the alert went out and 114 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
- 1117 J/kg
- Mixed-layer CIN
- -126 J/kg
- Mixed-layer LCL
- 1748 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 38 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
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 |
|---|---|---|---|---|
| Jul 6, 2:36 PM CDT | Mesoscale Discussion | SPC | Colbert, Franklin, Lauderdale | 84 min |
| Jul 6, 2:58 PM CDT | Severe Thunderstorm Watch | SPC | Colbert, Franklin, Lamar, Lauderdale, Lawrence, Marion | 5 hr |
| Jul 6, 5:08 PM CDT | Severe Thunderstorm Watch | SPC | Bibb, Dallas, Fayette, Greene, Hale, Lamar and 6 more | 4 hr |
| Jul 6, 12:42 PM CDT | Mesoscale Discussion | SPC | Clay, Greene, Mississippi | 93 min |
Nearby
Mesoscale Discussions in Mississippi, 2012Mesoscale Discussions in Arkansas, 2012Mesoscale Discussions in Tennessee, 2012Every mesoscale discussion in 2012
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.