Alert archive / Tennessee / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 21, NWS Nashville, TN

January 29, 2008Macon County, Smith County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jan 29, 2008, 7:52 PM CST for Macon County, Smith County, Tennessee. It was in force for 38 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jan 29, 2008, 7:52 PM CST (01:52 UTC)
Expired: Jan 29, 2008, 8:30 PM CST
In force: 38 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Macon County, TN, Smith County, TN

The radar

The Nashville radar (KOHX), 56 km from the middle of the area, began a volume at 01:52 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 was reported inside it

Time	Report	Where	Remark
Jan 29, 7:55 PM CST	TSTM WND DMG	Carthage, TN	THE 911 REPORTED TREES AND POWER LINES DOWN FROM 755-805 PM.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jan 29, 4:40 PM CST	Severe Thunderstorm Watch	SPC	3 hr
Jan 29, 7:12 PM CST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 1.9 hours before the alert went out and 64 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: 40 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 597 m above ground
0-6 km bulk shear: 86 kt
0-1 km storm-relative helicity: 605 m²/s²
0-3 km storm-relative helicity: 610 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS54 KOHX 300156
SVROHX
TNC111-159-300230-
/O.NEW.KOHX.SV.W.0021.080130T0152Z-080130T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
752 PM CST TUE JAN 29 2008

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MACON COUNTY IN TENNESSEE...
  THIS INCLUDES THE CITY OF LAYFATTE
  SMITH COUNTY IN TENNESSEE...
  THIS INCLUDES THE CITY OF CARTHAGE...

* UNTIL 830 PM CST

* AT 744 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS
  IN EXCESS OF 70 MPH. THE LINE OF STORMS WAS LOCATED LAFAYETTE TO
  HARTSVILLE TO JUST EAST OF LEBANON. 

* THE LINE OF SEVERE THUNDERSTORMS PUSH EAST THROUGH THE WARNED
  AREA...AFFECTING RED BOILING SPRINGS...CARTHAGE AND GORDONSVILLE.

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM CST
TUESDAY EVENING FOR CENTRAL TENNESSEE. A SEVERE THUNDERSTORM WATCH
ALSO REMAINS IN EFFECT UNTIL 1100 PM CST TUESDAY EVENING FOR EASTERN
MIDDLE TENNESSEE.

LAT...LON 3659 8581 3633 8586 3618 8580 3610 8605
      3624 8612 3635 8610 3638 8604 3639 8598
      3642 8599 3645 8606 3665 8591
TIME...MOT...LOC 0152Z 259DEG 46KT 3634 8600

$$
BOYD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 29, 6:30 PM CST	Severe Thunderstorm Warning	OHX	Dickson	30 min
Jan 29, 6:48 PM CST	Severe Thunderstorm Warning	OHX	Cheatham	27 min
Jan 29, 6:59 PM CST	Severe Thunderstorm Warning	OHX	Davidson, Wilson	31 min
Jan 29, 7:33 PM CST	Severe Thunderstorm Warning	OHX	Sumner, Trousdale, Wilson	42 min
Jan 29, 8:04 PM CST	Severe Thunderstorm Warning	OHX	Cannon, Rutherford	26 min
Jan 29, 8:12 PM CST	Severe Thunderstorm Warning	OHX	Clay, DeKalb, Jackson, Putnam, Smith	33 min
Jan 29, 8:29 PM CST	Severe Thunderstorm Warning	OHX	DeKalb, Overton, Putnam, Warren, White	31 min
Jan 29, 8:52 PM CST	Severe Thunderstorm Warning	OHX	Cumberland, Fentress	38 min
Jan 29, 9:16 PM CST	Wind Advisory	OHX	Bedford, Benton, Cannon, Cheatham, Clay, Coffee and 33 more	6 hr

Nearby

Severe Thunderstorm Warnings in Tennessee, 2008 Every severe thunderstorm warning in 2008

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.