Alert archive / Tennessee / Tornado Watches in 2006
Tornado Watch 90
The Storm Prediction Center issued this tornado watch at Mar 13, 2006, 5:48 PM EST for 22 counties in Tennessee. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 13, 2006, 5:48 PM EST (22:48 UTC)
- Expired
- Mar 13, 2006, 11:00 PM EST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 22 counties
Anderson County, TN, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Campbell County, TN, Claiborne County, TN, Grainger County, TN, Hamilton County, TN, Hancock County, TN, Knox County, TN, Loudon County, TN, Marion County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Morgan County, TN, Polk County, TN, Rhea County, TN, Roane County, TN, Scott County, TN, Sequatchie County, TN, Union County, TN
The radar
The Knoxville radar (KMRX), 115 km from the middle of the area, began a volume at 22:51 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.
Warnings issued inside it
6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 13, 6:22 PM EST | Severe Thunderstorm Warning | MRX | Morgan | 38 min |
| Mar 13, 6:47 PM EST | Severe Thunderstorm Warning | MRX | Scott | 28 min |
| Mar 13, 6:57 PM EST | Severe Thunderstorm Warning | MRX | Bledsoe, Sequatchie | 33 min |
| Mar 13, 7:00 PM EST | Severe Thunderstorm Warning | MRX | Campbell | 30 min |
| Mar 13, 8:47 PM EST | Severe Thunderstorm Warning | MRX | Blount | 28 min |
| Mar 13, 10:15 PM EST | Severe Thunderstorm Warning | MRX | Bledsoe, Rhea, Sequatchie | 30 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 10.8 hours before the alert went out and 176 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.
- Mixed-layer CAPE
- 29 J/kg
- Mixed-layer CIN
- -131 J/kg
- Mixed-layer LCL
- 1009 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 349 m²/s²
- 0-3 km storm-relative helicity
- 321 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 132244
SEL0
SPC WW 132244
TNZ000-140400-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 90
NWS STORM PREDICTION CENTER NORMAN OK
545 PM EST MON MAR 13 2006
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
EASTERN TENNESSEE
EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 545 PM UNTIL 1100
PM EST.
TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 40 STATUTE MILES
EAST AND WEST OF A LINE FROM 55 MILES NORTH OF KNOXVILLE TENNESSEE
TO 5 MILES WEST SOUTHWEST OF CHATTANOOGA TENNESSEE. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU0).
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.
OTHER WATCH INFORMATION...CONTINUE...WW 88...WW 89...
DISCUSSION...AREA OF CONVECTION FORMING IN MIDDLE TN WILL SPREAD EWD
INTO ERN TN THIS EVENING. THOUGH INSTABILITY ACROSS ERN TN IS
WEAK...VERTICAL SHEAR REMAINS FAVORABLE FOR SUPERCELLS WITH THE
THREAT FOR A COUPLE OF TORNADOES FOR THE NEXT FEW HOURS.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400.
MEAN STORM MOTION VECTOR 26035.
...THOMPSONSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 13, 7:08 AM EST | Mesoscale Discussion | SPC | Benton, Carroll, Chester, Crockett, Dyer, Fayette and 15 more | 97 min |
| Mar 13, 7:56 AM EST | Severe Thunderstorm Watch | SPC | Benton, Carroll, Crockett, Gibson, Henry, Houston and 4 more | 4 hr |
| Mar 13, 10:02 AM EST | Mesoscale Discussion | SPC | Dyer, Lake, Lauderdale, Shelby, Tipton | 58 min |
| Mar 13, 1:36 PM EST | Mesoscale Discussion | SPC | Bedford, Benton, Cannon, Cheatham, Chester, Coffee and 33 more | 114 min |
| Mar 13, 2:48 PM EST | Tornado Watch | SPC | Bedford, Cannon, Cheatham, Clay, Coffee, Cumberland and 36 more | 6 hr |
| Mar 13, 4:59 PM EST | Mesoscale Discussion | SPC | Bedford, Bledsoe, Campbell, Cannon, Cheatham, Coffee and 40 more | 91 min |
| Mar 13, 6:41 PM EST | Mesoscale Discussion | SPC | Anderson, Bedford, Bledsoe, Bradley, Cannon, Coffee and 37 more | 64 min |
Nearby
Tornado Watches in Tennessee, 2006Every tornado watch in 2006
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.