Alert archive / Tennessee / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 77, NWS Nashville, TN

March 15, 2012Overton County, Putnam County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Mar 15, 2012, 4:37 PM CDT for Overton County, Putnam County, Tennessee. It was in force for 23 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: Mar 15, 2012, 4:37 PM CDT (21:37 UTC)
Expired: Mar 15, 2012, 5:00 PM CDT
In force: 23 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Overton County, TN, Putnam County, TN

The radar

The Nashville radar (KOHX), 107 km from the middle of the area, began a volume at 21:38 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
Mar 15, 4:56 PM CDT	HAIL 0.88	Livingston, TN	REPORT RELAYED BY OVERTON COUNTY SHERIFFS OFFICE.

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
Mar 15, 2:06 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.6 hours before the alert went out and 113 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: 1726 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 820 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

865 
WUUS54 KOHX 152137
SVROHX
TNC133-141-152200-
/O.NEW.KOHX.SV.W.0077.120315T2137Z-120315T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
437 PM CDT THU MAR 15 2012

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  OVERTON COUNTY IN MIDDLE TENNESSEE...
  NORTH CENTRAL PUTNAM COUNTY IN MIDDLE TENNESSEE...

* UNTIL 500 PM CDT

* AT 433 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH. THE STORM WAS NEAR ALGOOD...
  MOVING NORTHEAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LIVINGSTON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL
WEATHER SERVICE BY CALLING TOLL FREE...1 8 7 7 6 3 3 6 7 7 2. DO NOT
STAY OUTDOORS IF YOU ARE IN THE PATH OF SEVERE THUNDERSTORMS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM THURSDAY
EVENING FOR CENTRAL TENNESSEE.

&&

LAT...LON 3638 8512 3618 8546 3626 8553 3626 8552
      3628 8549 3645 8549 3650 8544 3650 8540
      3649 8540 3649 8539 3650 8539 3652 8537
      3654 8527
TIME...MOT...LOC 2137Z 230DEG 18KT 3631 8545

$$

SHAMBURGER

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 14, 7:35 PM CDT	Special Weather Statement	OHX	Clay, Macon, Trousdale	55 min
Mar 15, 1:21 AM CDT	Special Weather Statement	OHX	Cumberland, White	54 min
Mar 15, 1:52 AM CDT	Severe Thunderstorm Warning	OHX	Cumberland, Fentress, Overton, Putnam	38 min
Mar 15, 12:16 PM CDT	Special Weather Statement	OHX	Williamson	59 min
Mar 15, 12:39 PM CDT	Special Weather Statement	OHX	Montgomery, Stewart	66 min
Mar 15, 12:47 PM CDT	Severe Thunderstorm Warning	OHX	Montgomery, Stewart	35 min
Mar 15, 12:59 PM CDT	Severe Thunderstorm Warning	OHX	Benton, Houston, Humphreys, Stewart	61 min
Mar 15, 1:20 PM CDT	Special Weather Statement	OHX	Williamson	55 min
Mar 15, 1:31 PM CDT	Severe Thunderstorm Warning	OHX	Benton, Houston, Montgomery, Stewart	44 min
Mar 15, 1:49 PM CDT	Severe Thunderstorm Warning	OHX	Williamson	41 min
Mar 15, 2:13 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Houston, Montgomery, Stewart	47 min
Mar 15, 2:19 PM CDT	Flash Flood Warning	OHX	Williamson	3 hr
Mar 15, 2:27 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Maury, Williamson	48 min
Mar 15, 2:32 PM CDT	Severe Thunderstorm Warning	OHX	Stewart	43 min
Mar 15, 2:42 PM CDT	Severe Thunderstorm Warning	OHX	Macon, Robertson, Sumner, Trousdale	63 min
Mar 15, 3:03 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Robertson, Rutherford, Sumner, Trousdale, Wilson	26 min
Mar 15, 3:07 PM CDT	Severe Thunderstorm Warning	OHX	Montgomery, Stewart	53 min
Mar 15, 3:27 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Humphreys	33 min
Mar 15, 3:57 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Hickman, Williamson	33 min
Mar 15, 4:08 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Houston, Humphreys	37 min
Mar 15, 4:19 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Rutherford, Williamson	26 min
Mar 15, 4:23 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Robertson	37 min
Mar 15, 4:39 PM CDT	Severe Thunderstorm Warning	OHX	Marshall, Maury, Rutherford, Williamson	36 min
Mar 15, 5:05 PM CDT	Severe Thunderstorm Warning	OHX	Fentress, Overton, Pickett	40 min
Mar 15, 5:07 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Giles, Marshall, Maury, Rutherford, Williamson	38 min
Mar 15, 5:24 PM CDT	Flash Flood Warning	OHX	Williamson	3 hr
Mar 15, 5:31 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, Davidson, Rutherford, Wilson	44 min
Mar 15, 5:45 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Cannon, Coffee, Giles, Marshall, Rutherford	45 min
Mar 15, 6:03 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Lawrence	35 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2012 Every severe thunderstorm warning in 2012

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.