Alert archive / Tennessee / Tornado Warnings in 2017

Tornado Warning 7, NWS Memphis, TN

March 9, 2017Decatur County, Tennessee

NWS Memphis, TN issued this tornado warning at Mar 9, 2017, 10:19 PM CST for Decatur County, Tennessee. It was in force for 26 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Mar 9, 2017, 10:19 PM CST (04:19 UTC)
Expired: Mar 9, 2017, 10:45 PM CST
In force: 26 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Decatur County, TN

The radar

The Ft Campbell radar (KHPX), 148 km from the middle of the area, began a volume at 04:19 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 9, 6:42 PM CST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 4.3 hours before the alert went out and 150 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2824 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 169 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

715 
WFUS54 KMEG 100419
TORMEG
TNC039-100445-
/O.NEW.KMEG.TO.W.0007.170310T0419Z-170310T0445Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Memphis TN
1019 PM CST THU MAR 9 2017

The National Weather Service in Memphis has issued a

* Tornado Warning for...
  Central Decatur County in western Tennessee...

* Until 1045 PM CST
    
* At 1019 PM CST, a severe thunderstorm producing a tornado was
  located over Darden, or 8 miles south of Natchez Trace State
  Forest, moving east at 70 mph.

  HAZARD...Tornado and quarter size hail. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* This tornadic thunderstorm will remain over mainly rural areas of
  central Decatur County, including the following locations: Mount
  Tabor, Perryville, Gumdale, Busseltown, Garrett, Beacon, Hickory
  Forks, Largo, Wilkinstown and Bible Hill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a storm shelter or an interior room on the
lowest floor of a sturdy building. Avoid windows. If you are
outdoors, in a mobile home, or in a vehicle, move to the closest
substantial shelter and protect yourself from flying debris.

&&

LAT...LON 3549 8798 3554 8823 3555 8823 3555 8822
      3556 8822 3561 8819 3562 8819 3563 8820
      3563 8819 3571 8818 3568 8802 3566 8802
      3562 8804 3552 8797
TIME...MOT...LOC 0419Z 279DEG 71KT 3562 8823 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

1 follow-up statement

350 
WWUS54 KMEG 100440
SVSMEG

Severe Weather Statement
National Weather Service Memphis TN
1040 PM CST THU MAR 9 2017

TNC039-100450-
/O.EXP.KMEG.TO.W.0007.000000T0000Z-170310T0445Z/
Decatur TN-
1040 PM CST THU MAR 9 2017

...THE TORNADO WARNING FOR CENTRAL DECATUR COUNTY WILL EXPIRE AT 1045
PM CST...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.

A severe thunderstorm watch remains in effect until midnight CST for
western Tennessee.

LAT...LON 3549 8798 3554 8823 3555 8823 3555 8822
      3556 8822 3561 8819 3562 8819 3563 8820
      3563 8819 3571 8818 3568 8802 3566 8802
      3562 8804 3552 8797
TIME...MOT...LOC 0440Z 279DEG 71KT 3556 8776 

$$

The office that day

Everything else NWS Memphis, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 9, 8:00 PM CST	Severe Thunderstorm Warning	MEG	Lake, Obion	45 min
Mar 9, 8:34 PM CST	Severe Thunderstorm Warning	MEG	Dyer, Lake	41 min
Mar 9, 8:45 PM CST	Severe Thunderstorm Warning	MEG	Gibson, Obion, Weakley	45 min
Mar 9, 8:52 PM CST	Severe Thunderstorm Warning	MEG	Obion	23 min
Mar 9, 9:10 PM CST	Severe Thunderstorm Warning	MEG	Henry	50 min
Mar 9, 9:29 PM CST	Severe Thunderstorm Warning	MEG	Carroll, Gibson, Henderson, Madison, Weakley	61 min
Mar 9, 9:32 PM CST	Severe Thunderstorm Warning	MEG	Henderson, Madison	43 min
Mar 9, 9:37 PM CST	Severe Thunderstorm Warning	MEG	Benton	38 min
Mar 9, 9:57 PM CST	Severe Thunderstorm Warning	MEG	Henderson	34 min
Mar 9, 10:00 PM CST	Severe Thunderstorm Warning	MEG	Decatur	45 min
Mar 9, 10:06 PM CST	Tornado Warning	MEG	Benton, Carroll, Decatur, Henderson	24 min
Mar 9, 10:07 PM CST	Tornado Warning	MEG	Henderson	21 min
Mar 9, 10:16 PM CST	Severe Thunderstorm Warning	MEG	Lauderdale, Tipton	44 min
Mar 9, 10:34 PM CST	Severe Thunderstorm Warning	MEG	Chester, Decatur, Hardin, Henderson, McNairy, Madison	41 min
Mar 9, 10:41 PM CST	Flash Flood Warning	MEG	Chester, Crockett, Haywood, Henderson, Madison	3 hr
Mar 9, 11:19 PM CST	Special Weather Statement	MEG	Shelby	26 min
Mar 9, 11:26 PM CST	Severe Thunderstorm Warning	MEG	Shelby	34 min
Mar 9, 11:46 PM CST	Severe Thunderstorm Warning	MEG	Fayette, Shelby	44 min
Mar 10, 3:30 AM CST	Frost Advisory	MEG	Fayette, Hardeman, Hardin, Haywood, Lauderdale, McNairy and 2 more	25 hr
Mar 10, 3:30 AM CST	Freeze Warning	MEG	Benton, Carroll, Chester, Crockett, Decatur, Dyer and 7 more	25 hr
Mar 10, 5:43 AM CST	River Flood Warning	MEG	Crockett, Dyer, Lauderdale	6 hr

Nearby

Tornado Warnings in Tennessee, 2017 Every tornado warning in 2017 Tornadoes 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.