Alert archive / Tennessee / Tornado Warnings in 2007

Tornado Warning 4, NWS Nashville, TN

April 26, 2007Cumberland County, Tennessee

NWS Nashville, TN issued this tornado warning at Apr 26, 2007, 4:23 PM CDT for Cumberland County, Tennessee. It was in force for 37 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 26, 2007, 4:23 PM CDT (21:23 UTC)
Expired: Apr 26, 2007, 5:00 PM CDT
In force: 37 min
Issued by: NWS Nashville, TN
Area: Counties, with a storm outline in the text

County Cumberland County, TN

The radar

The Knoxville radar (KMRX), 139 km from the middle of the area, began a volume at 21:25 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
Apr 26, 4:35 PM CDT	HAIL 0.25	Crab Orchard, TN	LARGE HAIL AND TORRENTIAL RAIN.
Apr 26, 4:35 PM CDT	HAIL 0.88	Crab Orchard, TN	LARGE HAIL AND TORRENTIAL RAINFALL.

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
Apr 26, 3:18 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.4 hours before the alert went out and 156 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: 159 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 746 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 184 m²/s²
0-3 km storm-relative helicity: 244 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.7

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KOHX 262123
TOROHX
TNC035-262200-
/O.NEW.KOHX.TO.W.0004.070426T2123Z-070426T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
423 PM CDT THU APR 26 2007

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN CUMBERLAND COUNTY IN TENNESSEE...

* UNTIL 500 PM CDT

* AT 421 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 11 MILES
  SOUTHWEST OF CRAB ORCHARD...OR ABOUT 11 MILES SOUTH OF
  CROSSVILLE...MOVING NORTHEAST AT 35 MPH.

* THE TORNADO WILL BE NEAR...
  CRAB ORCHARD BY 435 PM CDT...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

LAT...LON 3582 8514 3567 8502 3592 8452 3610 8468

$$

13

1 follow-up statement

000 
WWUS54 KOHX 262135
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
434 PM CDT THU APR 26 2007

TNC035-262200-
/O.CON.KOHX.TO.W.0004.000000T0000Z-070426T2200Z/
CUMBERLAND TN-
434 PM CDT THU APR 26 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM CDT FOR
SOUTHEASTERN CUMBERLAND COUNTY...

AT 430 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR CRAB ORCHARD...OR
ABOUT 9 MILES SOUTHEAST OF CROSSVILLE...MOVING NORTHEAST AT 40 MPH.

THE TORNADO WILL BE NEAR...
  RURAL EASTERN CUMBERLAND COUNTY THROUGH 500 PM CDT

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

LAT...LON 3582 8514 3567 8502 3592 8452 3610 8468

$$

13

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 26, 4:02 PM CDT	Tornado Warning	OHX	Cumberland	28 min
Apr 26, 4:17 PM CDT	Severe Thunderstorm Warning	OHX	Putnam	28 min
Apr 26, 4:30 PM CDT	Tornado Warning	OHX	Clay, Overton	30 min
Apr 26, 4:38 PM CDT	Tornado Warning	OHX	Overton	23 min

Nearby

Tornado Warnings in Tennessee, 2007 Every tornado warning in 2007 Tornadoes in 2007

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.