Alert archive / Tennessee / Mesoscale Discussions in 2016
Mesoscale Discussion 1894
The Storm Prediction Center issued this mesoscale discussion at Dec 17, 2016, 8:28 PM CST for 5 states. It was in force for 62 min.
The area
The outline as issued.
The facts
- Issued
- Dec 17, 2016, 8:28 PM CST (02:28 UTC)
- Expired
- Dec 17, 2016, 9:30 PM CST
- In force
- 62 min
- Issued by
- the Storm Prediction Center
All 81 counties
Colbert County, AL, Franklin County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Marion County, AL, Arkansas County, AR, Cleveland County, AR, Desha County, AR, Lincoln County, AR, Phillips County, AR, Allen County, KY, Barren County, KY, Monroe County, KY, Simpson County, KY, Alcorn County, MS, Benton County, MS, Bolivar County, MS, Calhoun County, MS, Chickasaw County, MS, Clay County, MS, Coahoma County, MS, DeSoto County, MS, Grenada 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, Webster County, MS, Yalobusha County, MS, Bedford County, TN, Benton County, TN, Cannon County, TN, Cheatham County, TN, Chester County, TN, Clay County, TN, Coffee County, TN, Davidson County, TN, Decatur County, TN, DeKalb County, TN, Dickson County, TN, Fayette County, TN, Giles County, TN, Hardeman County, TN, Hardin County, TN, Henderson County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Macon County, TN, Madison County, TN, Marshall County, TN, Maury County, TN, McNairy County, TN, Moore County, TN, Overton County, TN, Perry County, TN, Putnam County, TN, Robertson County, TN, Rutherford County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN, Wayne County, TN, Williamson County, TN, Wilson County, TN
The radar
The Memphis radar (KNQA), 117 km from the middle of the area, began a volume at 02:31 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 (KBYH), launched 00:00Z, 2.5 hours before the alert went out and 115 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
- 43 J/kg
- Mixed-layer CIN
- -194 J/kg
- Mixed-layer LCL
- 608 m above ground
- 0-6 km bulk shear
- 83 kt
- 0-1 km storm-relative helicity
- 395 m²/s²
- 0-3 km storm-relative helicity
- 525 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.0
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 |
|---|---|---|---|---|
| Dec 17, 8:58 PM CST | Tornado Watch | SPC | Colbert, Franklin, Lauderdale, Lawrence, Limestone | 6 hr |
| Dec 17, 11:48 PM CST | Mesoscale Discussion | SPC | Colbert, Franklin, Lamar, Lauderdale, Lawrence, Limestone and 1 more | 87 min |
| Dec 18, 1:03 AM CST | Severe Thunderstorm Watch | SPC | Blount, Cullman, DeKalb, Fayette, Jackson, Lamar and 7 more | 4 hr |
| Dec 18, 2:30 AM CST | Mesoscale Discussion | SPC | Colbert, Lauderdale | 4 hr |
| Dec 18, 3:24 AM CST | Mesoscale Discussion | SPC | Blount, Cullman, DeKalb, Etowah, Jackson, Marshall and 1 more | 66 min |
| Dec 17, 6:44 PM CST | Mesoscale Discussion | SPC | Ashley, Columbia, Union | 3 hr |
| Dec 18, 1:07 AM CST | Mesoscale Discussion | SPC | Bell, Boyd, Breathitt, Carter, Clay, Clinton and 21 more | 2 hr |
Nearby
Mesoscale Discussions in Tennessee, 2016Mesoscale Discussions in Mississippi, 2016Mesoscale Discussions in Alabama, 2016Every mesoscale discussion in 2016
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.