Alert archive / Tennessee / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 49, NWS Nashville, TN

April 20, 20154 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Apr 20, 2015, 2:19 AM CDT for 4 counties in Tennessee. It was in force for 41 min. 2 reports 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
Apr 20, 2015, 2:19 AM CDT (07:19 UTC)
Expired
Apr 20, 2015, 3:00 AM CDT
In force
41 min
Issued by
NWS Nashville, TN
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Clay County, TN, Jackson County, TN, Overton County, TN, Pickett County, TN

The radar

The Nashville radar (KOHX), 110 km from the middle of the area, began a volume at 07:18 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

TimeReportWhereRemark
Apr 20, 2:34 AM CDTTSTM WND DMG3 Ne Gainesboro, TNTREE DOWN BLOCKING YORK HIGHWAY
Apr 20, 2:36 AM CDTTSTM WND DMGCelina, TNTREES AND POWER LINES DOWN ON HIGHWAY 52 WEST

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.

IssuedProductOfficeLasted
Apr 20, 1:09 AM CDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 7.3 hours before the alert went out and 116 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-pSkew-T log-p diagram, Nashville Metro, TN at 00:00Z on 2015-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 170 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 00:00Z on 2015-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
170 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
927 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
67 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

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

956 
WUUS54 KOHX 200719
SVROHX
TNC027-087-133-137-200800-
/O.NEW.KOHX.SV.W.0049.150420T0719Z-150420T0800Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
219 AM CDT MON APR 20 2015

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CLAY COUNTY IN MIDDLE TENNESSEE...
  JACKSON COUNTY IN MIDDLE TENNESSEE...
  NORTHERN OVERTON COUNTY IN MIDDLE TENNESSEE...
  WESTERN PICKETT COUNTY IN MIDDLE TENNESSEE...

* UNTIL 300 AM CDT

* AT 218 AM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 7 MILES SOUTH OF TOMPKINSVILLE TO 9 MILES EAST OF
  CARTHAGE...AND MOVING EAST AT 50 MPH.

  HAZARD...60 MPH WIND GUSTS.

  SOURCE...RADAR INDICATED.

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING AND TREES.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  GAINESBORO AROUND 225 AM CDT.
  CELINA AROUND 235 AM CDT.
  LIVINGSTON AROUND 250 AM CDT.
  BYRDSTOWN AROUND 300 AM CDT.

OTHER LOCATIONS IN THE WARNING INCLUDE BOLES...WHITLEYVILLE...MOSS...
STANDING STONE STATE PARK AND DALE HOLLOW LAKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3662 8504 3653 8505 3650 8509 3640 8512
      3629 8512 3630 8549 3627 8552 3626 8583
      3630 8585 3663 8579
TIME...MOT...LOC 0720Z 269DEG 42KT 3661 8571 3628 8576

HAIL...<.75IN
WIND...60MPH

$$

SHAMBURGER
3 follow-up statements
595 
WWUS54 KOHX 200739
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
239 AM CDT MON APR 20 2015

TNC027-087-133-137-200800-
/O.CON.KOHX.SV.W.0049.000000T0000Z-150420T0800Z/
OVERTON TN-PICKETT TN-CLAY TN-JACKSON TN-
239 AM CDT MON APR 20 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN
JACKSON...CLAY...WESTERN PICKETT AND NORTHERN OVERTON COUNTIES UNTIL
300 AM CDT...

AT 236 AM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM CELINA TO 8 MILES NORTHWEST OF ALGOOD...AND MOVING
EAST AT 50 MPH.

HAZARD...60 MPH WIND GUSTS.

SOURCE...RADAR INDICATED.

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING AND TREES.

SEVERE THUNDERSTORMS WILL BE NEAR...
  LIVINGSTON AROUND 250 AM CDT.
  BYRDSTOWN AROUND 300 AM CDT.

OTHER LOCATIONS IN THE WARNING INCLUDE DALE HOLLOW LAKE AND STANDING
STONE STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3654 8505 3650 8509 3641 8512 3629 8512
      3630 8548 3627 8552 3627 8573 3662 8562
      3662 8504
TIME...MOT...LOC 0739Z 269DEG 42KT 3661 8545 3628 8550

HAIL...<.75IN
WIND...60MPH

$$

SHAMBURGER
665 
WWUS54 KOHX 200750
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
250 AM CDT MON APR 20 2015

TNC027-087-133-137-200800-
/O.CON.KOHX.SV.W.0049.000000T0000Z-150420T0800Z/
OVERTON TN-PICKETT TN-CLAY TN-JACKSON TN-
250 AM CDT MON APR 20 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN
JACKSON...EASTERN CLAY...WESTERN PICKETT AND NORTHERN OVERTON
COUNTIES UNTIL 300 AM CDT...

AT 246 AM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE 
EXTENDING FROM 10 MILES NORTHEAST OF CELINA TO RICKMAN...AND MOVING 
EAST AT 50 MPH.

HAZARD...60 MPH WIND GUSTS.

SOURCE...RADAR INDICATED.

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING AND TREES.

SEVERE THUNDERSTORMS WILL BE NEAR...
  BYRDSTOWN AROUND 300 AM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3654 8505 3650 8509 3641 8512 3629 8512
      3630 8549 3627 8552 3627 8568 3662 8549
      3662 8504
TIME...MOT...LOC 0750Z 269DEG 42KT 3661 8527 3630 8537

HAIL...<.75IN
WIND...60MPH

$$

SHAMBURGER
800 
WWUS54 KOHX 200757
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
257 AM CDT MON APR 20 2015

TNC027-087-133-137-200807-
/O.EXP.KOHX.SV.W.0049.000000T0000Z-150420T0800Z/
OVERTON TN-PICKETT TN-CLAY TN-JACKSON TN-
257 AM CDT MON APR 20 2015

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN JACKSON...EASTERN
CLAY...WESTERN PICKETT AND NORTHERN OVERTON COUNTIES WILL EXPIRE AT
300 AM CDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR 
PROPERTY.  HOWEVER...GUSTY WINDS TO 50 MPH ARE STILL POSSIBLE WITH 
THESE THUNDERSTORMS.

LAT...LON 3654 8505 3650 8509 3641 8512 3629 8512
      3630 8549 3627 8552 3627 8568 3662 8549
      3662 8504
TIME...MOT...LOC 0757Z 269DEG 42KT 3661 8517 3630 8527

$$

SHAMBURGER

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 19, 7:22 PM CDTSevere Thunderstorm WarningOHXDickson, Houston23 min
Apr 19, 8:09 PM CDTSpecial Weather StatementOHXDavidson21 min
Apr 19, 10:03 PM CDTRiver Flood AdvisoryOHXDavidson25 hr
Apr 19, 11:00 PM CDTSpecial Weather StatementOHXStewart30 min
Apr 19, 11:30 PM CDTSpecial Weather StatementOHXMontgomery45 min
Apr 19, 11:33 PM CDTSpecial Weather StatementOHXDickson, Hickman, Houston, Humphreys42 min
Apr 20, 12:06 AM CDTSevere Thunderstorm WarningOHXDickson, Hickman, Humphreys, Perry39 min
Apr 20, 12:07 AM CDTSpecial Weather StatementOHXLewis, Wayne53 min
Apr 20, 12:19 AM CDTSpecial Weather StatementOHXRobertson26 min
Apr 20, 12:27 AM CDTSpecial Weather StatementOHXCheatham, Dickson33 min
Apr 20, 12:34 AM CDTSevere Thunderstorm WarningOHXHickman, Lawrence, Lewis, Maury, Wayne26 min
Apr 20, 12:39 AM CDTSevere Thunderstorm WarningOHXCheatham, Davidson, Robertson36 min
Apr 20, 12:43 AM CDTSevere Thunderstorm WarningOHXDavidson, Dickson, Hickman, Maury, Williamson32 min
Apr 20, 1:01 AM CDTSpecial Weather StatementOHXMaury29 min
Apr 20, 1:02 AM CDTSevere Thunderstorm WarningOHXDavidson, Sumner, Wilson28 min
Apr 20, 1:09 AM CDTSpecial Weather StatementOHXGiles36 min
Apr 20, 1:15 AM CDTSpecial Weather StatementOHXRutherford, Williamson30 min
Apr 20, 1:25 AM CDTSpecial Weather StatementOHXBedford, Marshall35 min
Apr 20, 1:29 AM CDTSevere Thunderstorm WarningOHXMacon, Smith, Sumner, Trousdale, Wilson31 min
Apr 20, 1:45 AM CDTSpecial Weather StatementOHXRutherford, Wilson30 min
Apr 20, 1:49 AM CDTSpecial Weather StatementOHXMacon, Smith, Trousdale26 min
Apr 20, 1:59 AM CDTSpecial Weather StatementOHXBedford, Cannon, Coffee46 min
Apr 20, 2:11 AM CDTSpecial Weather StatementOHXClay, Jackson, Overton, Pickett, Smith64 min
Apr 20, 2:13 AM CDTSpecial Weather StatementOHXDeKalb, Putnam, White62 min
Apr 20, 2:31 AM CDTSpecial Weather StatementOHXCoffee, Grundy, Van Buren, Warren59 min
Apr 20, 3:09 AM CDTSpecial Weather StatementOHXCumberland, Fentress, Overton, Pickett66 min
Apr 20, 3:59 AM CDTRiver Flood AdvisoryOHXMontgomery20 hr
Apr 20, 12:05 PM CDTRiver Flood AdvisoryOHXPerry37 hr

Nearby

Severe Thunderstorm Warnings in Tennessee, 2015Every severe thunderstorm warning in 2015

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.