Alert archive / Tennessee / Severe Thunderstorm Watches in 2016
Severe Thunderstorm Watch 71
The Storm Prediction Center issued this severe thunderstorm watch at Mar 31, 2016, 3:59 PM CDT for 15 counties in Kentucky; 26 counties in Tennessee. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 31, 2016, 3:59 PM CDT (20:59 UTC)
- Expired
- Mar 31, 2016, 9:08 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 41 counties
Adair County, KY, Allen County, KY, Barren County, KY, Casey County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Green County, KY, Hart County, KY, Metcalfe County, KY, Monroe County, KY, Russell County, KY, Simpson County, KY, Taylor County, KY, Warren County, KY, Bedford County, TN, Cannon County, TN, Cheatham County, TN, Clay County, TN, Davidson County, TN, DeKalb County, TN, Dickson County, TN, Giles County, TN, Hickman County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Macon County, TN, Marshall County, TN, Maury 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 Nashville radar (KOHX), 46 km from the middle of the area, began a volume at 20:59 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 20%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
24 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 31, 4:06 PM CDT | Severe Thunderstorm Warning | OHX | Dickson, Hickman, Houston, Humphreys, Perry | 39 min |
| Mar 31, 4:14 PM CDT | Tornado Warning | OHX | Hickman, Lewis, Perry | 46 min |
| Mar 31, 4:21 PM CDT | Severe Thunderstorm Warning | LMK | Barren, Edmonson, Green, Hart, Metcalfe | 24 min |
| Mar 31, 4:37 PM CDT | Severe Thunderstorm Warning | OHX | Cheatham, Davidson, Dickson, Montgomery, Robertson | 23 min |
| Mar 31, 4:45 PM CDT | Severe Thunderstorm Warning | LMK | Adair, Barren, Edmonson, Green, Hart, Metcalfe | 30 min |
| Mar 31, 4:48 PM CDT | Tornado Warning | OHX | Hickman, Lewis, Maury | 42 min |
| Mar 31, 4:49 PM CDT | Severe Thunderstorm Warning | OHX | Lewis, Wayne | 26 min |
| Mar 31, 5:12 PM CDT | Severe Thunderstorm Warning | LMK | Adair, Casey, Cumberland, Green, Metcalfe, Russell and 1 more | 48 min |
| Mar 31, 5:14 PM CDT | Severe Thunderstorm Warning | OHX | Lawrence, Lewis, Wayne | 46 min |
| Mar 31, 5:18 PM CDT | Tornado Warning | OHX | Maury | 27 min |
| Mar 31, 5:42 PM CDT | Tornado Warning | OHX | Marshall, Maury | 29 min |
| Mar 31, 5:44 PM CDT | Tornado Warning | OHX | Giles, Lawrence | 31 min |
| Mar 31, 6:06 PM CDT | Severe Thunderstorm Warning | OHX | Bedford, Marshall, Rutherford | 39 min |
| Mar 31, 6:14 PM CDT | Tornado Warning | OHX | Giles, Lawrence | 31 min |
| Mar 31, 6:44 PM CDT | Severe Thunderstorm Warning | OHX | Cannon, DeKalb, Warren, Wilson | 31 min |
| Mar 31, 6:47 PM CDT | Tornado Warning | OHX | Giles, Marshall | 28 min |
| Mar 31, 6:53 PM CDT | Severe Thunderstorm Warning | OHX | Smith, Sumner, Trousdale, Wilson | 22 min |
| Mar 31, 7:08 PM CDT | Tornado Warning | OHX | Giles | 22 min |
| Mar 31, 7:22 PM CDT | Severe Thunderstorm Warning | OHX | Lawrence | 23 min |
| Mar 31, 7:25 PM CDT | Tornado Warning | OHX | Giles | 35 min |
| Mar 31, 7:44 PM CDT | Severe Thunderstorm Warning | OHX | Giles, Lawrence | 31 min |
| Mar 31, 7:46 PM CDT | Tornado Warning | OHX | Giles, Lawrence | 29 min |
| Mar 31, 8:12 PM CDT | Severe Thunderstorm Warning | OHX | Giles, Lawrence | 33 min |
| Mar 31, 8:28 PM CDT | Flash Flood Warning | OHX | Giles, Lawrence, Wayne | 3 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 9.0 hours before the alert went out and 56 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 834 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 673 m²/s²
- 0-3 km storm-relative helicity
- 836 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
664 WWUS20 KWNS 312057 SEL1 SPC WW 312057 KYZ000-TNZ000-010300- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 71 NWS STORM PREDICTION CENTER NORMAN OK 400 PM CDT THU MAR 31 2016 THE NWS STORM PREDICTION CENTER HAS ISSUED A * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF SOUTH CENTRAL KENTUCKY MIDDLE TENNESSEE * EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 400 PM UNTIL 1000 PM CDT. * PRIMARY THREATS INCLUDE... SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE ISOLATED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE A TORNADO OR TWO POSSIBLE SUMMARY...ORGANIZED THUNDERSTORMS IN WESTERN TENNESSEE AND SOUTH CENTRAL KENTUCKY WILL LIKELY PERSIST AND MOVE EASTWARD THROUGH THIS EVENING. AN ISOLATED TORNADO COULD OCCUR IN SOUTHWEST MIDDLE TENNESSEE...BUT THE MAIN RISKS SHOULD BE DAMAGING WINDS AND LARGE HAIL. THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 45 STATUTE MILES EAST AND WEST OF A LINE FROM 125 MILES NORTHEAST OF NASHVILLE TENNESSEE TO 85 MILES SOUTH SOUTHWEST OF NASHVILLE TENNESSEE. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES. && OTHER WATCH INFORMATION...CONTINUE...WW 68...WW 69...WW 70... AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM MOTION VECTOR 26035. ...THOMPSON
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 31, 10:26 AM CDT | Mesoscale Discussion | SPC | Calloway, Fulton, Graves, Hickman | 3 hr |
| Mar 31, 10:58 AM CDT | Severe Thunderstorm Watch | SPC | Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 14 more | 5 hr |
| Mar 31, 2:14 PM CDT | Mesoscale Discussion | SPC | Butler, Caldwell, Calloway, Christian, Graves, Hopkins and 9 more | 91 min |
| Mar 31, 3:48 PM CDT | Mesoscale Discussion | SPC | Logan, Simpson, Warren | 87 min |
| Mar 31, 5:09 PM CDT | Mesoscale Discussion | SPC | Ballard, Caldwell, Carlisle, Crittenden, Daviess, Graves and 10 more | 96 min |
| Mar 31, 5:49 PM CDT | Mesoscale Discussion | SPC | Adair, Allen, Barren, Boyle, Breathitt, Casey and 28 more | 56 min |
| Mar 31, 2:35 PM CDT | Tornado Watch | SPC | Chester, Decatur, Fayette, Hardeman, Hardin, Henderson and 2 more | 7 hr |
| Mar 31, 5:58 PM CDT | Tornado Watch | SPC | Bedford, Cannon, Coffee, Franklin, Giles, Grundy and 8 more | 7 hr |
| Mar 31, 6:52 PM CDT | Mesoscale Discussion | SPC | Franklin, Giles, Lincoln, Moore | 53 min |
Nearby
Severe Thunderstorm Watches in Tennessee, 2016Severe Thunderstorm Watches in Kentucky, 2016Every severe thunderstorm watch 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.