Alert archive / Tennessee / Mesoscale Discussions in 2017
Mesoscale Discussion 1137
The Storm Prediction Center issued this mesoscale discussion at Jun 23, 2017, 3:17 PM CDT for 4 states. It was in force for 118 min.
The area
The outline as issued.
The facts
- Issued
- Jun 23, 2017, 3:17 PM CDT (20:17 UTC)
- Expired
- Jun 23, 2017, 5:15 PM CDT
- In force
- 118 min
- Issued by
- the Storm Prediction Center
All 61 counties
Bibb County, AL, Blount County, AL, Calhoun County, AL, Cherokee County, AL, Chilton County, AL, Cullman County, AL, DeKalb County, AL, Etowah County, AL, Greene County, AL, Hale County, AL, Jackson County, AL, Jefferson County, AL, Madison County, AL, Marshall County, AL, Perry County, AL, Shelby County, AL, St. Clair County, AL, Sumter County, AL, Talladega County, AL, Tuscaloosa County, AL, Walker County, AL, Catoosa County, GA, Chattooga County, GA, Dade County, GA, Walker County, GA, Whitfield County, GA, Lauderdale County, MS, Anderson County, TN, Bedford County, TN, Bledsoe County, TN, Bradley County, TN, Campbell County, TN, Cannon County, TN, Claiborne County, TN, Coffee County, TN, Cumberland County, TN, DeKalb County, TN, Fentress County, TN, Franklin County, TN, Grundy County, TN, Hamilton County, TN, Jackson County, TN, Knox County, TN, Lincoln County, TN, Loudon County, TN, Marion County, TN, McMinn County, TN, Meigs County, TN, Moore County, TN, Morgan County, TN, Overton County, TN, Putnam County, TN, Rhea County, TN, Roane County, TN, Scott County, TN, Sequatchie County, TN, Smith County, TN, Union County, TN, Van Buren County, TN, Warren County, TN, White County, TN
The radar
The Birmingham radar (KBMX), 76 km from the middle of the area, began a volume at 20:19 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
Birmingham, AL (KBMX), launched 12:00Z, 8.3 hours before the alert went out and 75 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
- 289 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 676 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 230 m²/s²
- 0-3 km storm-relative helicity
- 251 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 5.1
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 |
|---|---|---|---|---|
| Jun 22, 8:57 PM CDT | Mesoscale Discussion | SPC | Autauga, Baldwin, Barbour, Bibb, Blount, Bullock and 47 more | 63 min |
| Jun 23, 10:54 AM CDT | Mesoscale Discussion | SPC | Bibb, Blount, Colbert, Cullman, Fayette, Franklin and 19 more | 96 min |
| Jun 23, 12:16 PM CDT | Tornado Watch | SPC | Blount, Cherokee, Colbert, Cullman, DeKalb, Etowah and 17 more | 6 hr |
| Jun 23, 2:04 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Calhoun, Coahoma, DeSoto, Lafayette, Marshall and 9 more | 6 hr |
| Jun 23, 4:35 PM CDT | Mesoscale Discussion | SPC | Coahoma, DeSoto, Panola, Quitman, Tate, Tunica | 85 min |
Nearby
Mesoscale Discussions in Tennessee, 2017Mesoscale Discussions in Alabama, 2017Mesoscale Discussions in Georgia, 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.