Alert archive / Tennessee / Mesoscale Discussions in 2018
Mesoscale Discussion 932
The Storm Prediction Center issued this mesoscale discussion at Jun 28, 2018, 8:39 PM CDT for 4 states. It was in force for 96 min.
The area
The outline as issued.
The facts
- Issued
- Jun 28, 2018, 8:39 PM CDT (01:39 UTC)
- Expired
- Jun 28, 2018, 10:15 PM CDT
- In force
- 96 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 95%
All 38 counties
Colbert County, AL, Lauderdale County, AL, Crittenden County, AR, Alcorn County, MS, Benton County, MS, DeSoto County, MS, Marshall County, MS, Prentiss County, MS, Tippah County, MS, Tishomingo County, MS, Benton County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Davidson County, TN, Decatur 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, Lawrence County, TN, Lewis County, TN, Madison County, TN, Marshall County, TN, Maury County, TN, McNairy County, TN, Montgomery County, TN, Perry County, TN, Robertson County, TN, Rutherford County, TN, Shelby County, TN, Wayne County, TN, Williamson County, TN
The radar
The Memphis radar (KNQA), 131 km from the middle of the area, began a volume at 01:40 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, 1.7 hours before the alert went out and 158 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
- 2733 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 1855 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -21 m²/s²
- 0-3 km storm-relative helicity
- -8 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Jun 28, 7:01 PM CDT | Mesoscale Discussion | SPC | Baldwin, Choctaw, Clarke, Coffee, Conecuh, Covington and 6 more | 89 min |
| Jun 28, 11:00 PM CDT | Mesoscale Discussion | SPC | Clay, Craighead, Crittenden, Cross, Greene, Mississippi and 1 more | 90 min |
| Jun 28, 7:30 PM CDT | Mesoscale Discussion | SPC | Dyer, Gibson, Henry, Lake, Obion, Weakley | 90 min |
| Jun 28, 8:55 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Carroll, Cheatham, Chester, Crockett, Decatur and 21 more | 4 hr |
Nearby
Mesoscale Discussions in Tennessee, 2018Mesoscale Discussions in Mississippi, 2018Mesoscale Discussions in Alabama, 2018Every mesoscale discussion in 2018
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.