Alert archive / Tennessee / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 129, NWS Nashville, TN

April 26, 2012Davidson County, Robertson County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Apr 26, 2012, 6:45 PM CDT for Davidson County, Robertson County, Tennessee. It was in force for 30 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: Apr 26, 2012, 6:45 PM CDT (23:45 UTC)
Expired: Apr 26, 2012, 7:15 PM CDT
In force: 30 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Davidson County, TN, Robertson County, TN

The radar

The Nashville radar (KOHX), 18 km from the middle of the area, began a volume at 23:46 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
Apr 26, 2:11 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 11.8 hours before the alert went out and 18 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: 824 J/kg
Mixed-layer CIN: -212 J/kg
Mixed-layer LCL: 986 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 317 m²/s²
0-3 km storm-relative helicity: 344 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 9.1

Open this sounding in Storm Lab

The text

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

548 
WUUS54 KOHX 262345
SVROHX
TNC037-147-270015-
/O.NEW.KOHX.SV.W.0129.120426T2345Z-120427T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
645 PM CDT THU APR 26 2012

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL ROBERTSON COUNTY IN MIDDLE TENNESSEE...
  CENTRAL DAVIDSON COUNTY IN MIDDLE TENNESSEE...

* UNTIL 715 PM CDT

* AT 645 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 RIDGETOP...
  MOVING SOUTH AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  NASHVILLE...
  BELLE MEADE...

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 800 PM THURSDAY
EVENING FOR CENTRAL TENNESSEE.

&&

LAT...LON 3613 8663 3608 8687 3638 8691 3641 8675
TIME...MOT...LOC 2345Z 344DEG 22KT 3631 8684

$$

FORECASTER: 31

1 follow-up statement

030 
WWUS54 KOHX 262358
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
658 PM CDT THU APR 26 2012

TNC147-270008-
/O.CAN.KOHX.SV.W.0129.000000T0000Z-120427T0015Z/
ROBERTSON TN-
658 PM CDT THU APR 26 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL ROBERTSON COUNTY
IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 3608 8687 3633 8690 3631 8671 3629 8670
      3611 8672
TIME...MOT...LOC 2358Z 353DEG 15KT 3628 8680

$$

TNC037-270015-
/O.CON.KOHX.SV.W.0129.000000T0000Z-120427T0015Z/
DAVIDSON TN-
658 PM CDT THU APR 26 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL
DAVIDSON COUNTY UNTIL 715 PM CDT...

AT 658 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.  THIS STORM WAS LOCATED 6 MILES
SOUTHWEST OF GOODLETTSVILLE...OR 8 MILES NORTH OF NASHVILLE...MOVING
SOUTH AT 15 MPH.

LOCATIONS IMPACTED INCLUDE...
  NASHVILLE...BELLE MEADE AND BERRY HILL.

LAT...LON 3608 8687 3633 8690 3631 8671 3629 8670
      3611 8672
TIME...MOT...LOC 2358Z 353DEG 15KT 3628 8680

$$
31

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 26, 4:56 AM CDT	Severe Thunderstorm Warning	OHX	Clay, Fentress, Jackson, Macon, Overton, Pickett	34 min
Apr 26, 5:24 AM CDT	Severe Thunderstorm Warning	OHX	Clay, Cumberland, Fentress, Jackson, Macon, Overton and 6 more	51 min
Apr 26, 6:15 AM CDT	Severe Thunderstorm Warning	OHX	Cumberland, DeKalb, Putnam, Smith, Van Buren, White	45 min
Apr 26, 7:00 AM CDT	Severe Thunderstorm Warning	OHX	Cumberland, Van Buren, White	30 min
Apr 26, 3:40 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson, Macon, Sumner, Trousdale	65 min
Apr 26, 4:18 PM CDT	Severe Thunderstorm Warning	OHX	Robertson	42 min
Apr 26, 4:43 PM CDT	Severe Thunderstorm Warning	OHX	Jackson, Macon, Smith, Sumner, Trousdale	32 min
Apr 26, 4:47 PM CDT	Special Weather Statement	OHX	Benton	28 min
Apr 26, 4:52 PM CDT	Severe Thunderstorm Warning	OHX	Benton	23 min
Apr 26, 5:00 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Robertson, Sumner	30 min
Apr 26, 5:14 PM CDT	Special Weather Statement	OHX	Humphreys	31 min
Apr 26, 5:30 PM CDT	Special Weather Statement	OHX	Smith	15 min
Apr 26, 5:33 PM CDT	Special Weather Statement	OHX	Pickett	27 min
Apr 26, 5:49 PM CDT	Special Weather Statement	OHX	Wilson	26 min
Apr 26, 5:52 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Sumner, Wilson	23 min
Apr 26, 6:15 PM CDT	Special Weather Statement	OHX	Dickson	30 min
Apr 26, 6:22 PM CDT	Severe Thunderstorm Warning	OHX	Wilson	23 min
Apr 26, 6:34 PM CDT	Special Weather Statement	OHX	Williamson	26 min
Apr 26, 6:41 PM CDT	Special Weather Statement	OHX	Dickson	34 min
Apr 26, 6:43 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Williamson	32 min
Apr 26, 6:49 PM CDT	Severe Thunderstorm Warning	OHX	Williamson	26 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.