Alert archive / Tennessee / Mesoscale Discussions in 2017
Mesoscale Discussion 347
The Storm Prediction Center issued this mesoscale discussion at Mar 27, 2017, 3:39 PM CDT for 5 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 27, 2017, 3:39 PM CDT (20:39 UTC)
- Expired
- Mar 27, 2017, 5:45 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 80 counties
Craighead County, AR, Crittenden County, AR, Cross County, AR, Lee County, AR, Mississippi County, AR, Phillips County, AR, Poinsett County, AR, St. Francis County, AR, Ballard County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Christian County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Muhlenberg County, KY, Todd County, KY, Trigg County, KY, Webster County, KY, Pemiscot County, MO, Alcorn County, MS, Benton County, MS, Calhoun County, MS, Chickasaw County, MS, Coahoma County, MS, DeSoto County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Marshall County, MS, Monroe County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Quitman County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Yalobusha County, MS, Benton County, TN, Carroll County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Dickson County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Lake County, TN, Lauderdale County, TN, Lewis County, TN, Madison County, TN, McNairy County, TN, Montgomery County, TN, Obion County, TN, Perry County, TN, Shelby County, TN, Stewart County, TN, Tipton County, TN, Wayne County, TN, Weakley County, TN
The radar
The Memphis radar (KNQA), 99 km from the middle of the area, began a volume at 20:42 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 (KBYH), launched 12:00Z, 8.7 hours before the alert went out and 131 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
- 1 J/kg
- Mixed-layer CIN
- -250 J/kg
- Mixed-layer LCL
- 1438 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 222 m²/s²
- 0-3 km storm-relative helicity
- 369 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 26, 8:49 PM CDT | Severe Thunderstorm Watch | SPC | Crawford, Franklin, Howard, Little River, Logan, Miller and 4 more | 6 hr |
| Mar 27, 12:44 AM CDT | Mesoscale Discussion | SPC | Garland, Hempstead, Howard, Lafayette, Little River, Logan and 8 more | 61 min |
| Mar 27, 11:26 AM CDT | Mesoscale Discussion | SPC | Clay, Craighead, Greene, Mississippi, Poinsett | 3 hr |
| Mar 27, 12:08 PM CDT | Severe Thunderstorm Watch | SPC | Craighead, Crittenden, Cross, Lee, Mississippi, Phillips and 2 more | 8 hr |
| Mar 27, 1:54 PM CDT | Severe Thunderstorm Watch | SPC | Chicot | 7 hr |
| Mar 27, 3:33 PM CDT | Mesoscale Discussion | SPC | Chicot | 87 min |
| Mar 27, 1:58 PM CDT | Mesoscale Discussion | SPC | Adair, Allen, Barren, Breckinridge, Bullitt, Butler and 30 more | 2 hr |
| Mar 27, 2:24 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Allen, Anderson, Barren, Bourbon, Boyle and 46 more | 8 hr |
| Mar 27, 4:43 PM CDT | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Bath, Bell and 71 more | 92 min |
| Mar 27, 5:02 PM CDT | Severe Thunderstorm Watch | SPC | Bath, Bell, Breathitt, Clay, Elliott, Estill and 25 more | 5 hr |
| Mar 27, 5:59 PM CDT | Mesoscale Discussion | SPC | Allen, Simpson | 91 min |
| Mar 27, 12:12 PM CDT | Mesoscale Discussion | SPC | Attala, Calhoun, Carroll, Chickasaw, Choctaw, Clay and 24 more | 2 hr |
Nearby
Mesoscale Discussions in Tennessee, 2017Mesoscale Discussions in Mississippi, 2017Mesoscale Discussions in Kentucky, 2017Every mesoscale discussion in 2017
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.