Tennessee Storm Report

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
554 PM CST MON APR 3 2006

...PRELIMINARY MID SOUTH STORM DAMAGE ASSESSMENTS FROM THE MAJOR
TORNADO OUTBREAK OF APRIL 2 2006...

A COLD FRONT PUSHED THROUGH THE MID SOUTH SUNDAY NIGHT INTO EARLY
MONDAY MORNING. WARM MOIST AND HIGHLY UNSTABLE AIR AHEAD OF THIS
COLD FRONT RESULTED IN THUNDERSTORMS WHICH RAPIDLY BECAME SEVERE
AND PRODUCED TORNADOES ACROSS PORTIONS OF THE MID SOUTH. NATIONAL
WEATHER SERVICE PERSONNEL IN MEMPHIS HAVE BEGUN STORM DAMAGE
ASSESSMENTS ACROSS THE MID SOUTH WITH ADDITIONAL DAMAGE ASSESSMENTS
TO CONTINUE INTO TUESDAY.

PRELIMINARY ASSESSMENT OF THE DYER COUNTY TORNADO:

A STORM DAMAGE ASSESSMENT TEAM SURVEYED THE DAMAGE ACROSS DYER
COUNTY ON MONDAY. THIS TORNADO WAS A CONTINUATION FROM THE TORNADIC
THUNDERSTORM IN CARUTHERSVILLE MISSOURI AND TRAVELED FOR 18 MILES
BEFORE DISSIPATING IN NEWBERN TENNESSEE (DYER COUNTY). PRELIMINARY
F-SCALE ASSESSMENT RATES THIS TORNADO AT A STRONG F3 TORNADO WITH
ESTIMATED WINDS AROUND 200 MPH. NUMEROUS HOMES WERE DESTROYED WITH
ADDITIONAL PROPERTY DAMAGE NOTED. THERE WERE 15 FATALITIES WITH THIS
STORM AND ONE INDIVIDUAL STILL NOT ACCOUNTED FOR.

PRELIMINARY ASSESSMENT OF THE GIBSON COUNTY TORNADO:

AFTER THIS TORNADO DISSIPATED...ANOTHER TORNADO TOUCHED DOWN IN GIBSON
COUNTY TENNESSEE JUST EAST OF YORKVILLE AND MOVED THROUGH DYER AND
THEN THROUGH BRADFORD. TORNADIC DAMAGE WAS RATED A F1 ON THE FUJITA
SCALE WITH UP TO F3 DAMAGE IN BRADFORD...ESPECIALLY ON TAYLOR ROAD
JUST EAST OF HIGHWAY 45. THE STORM CONTINUED EAST THROUGH WEAKLEY
AND CARROLL COUNTIES IN TENNESSEE WHICH WILL HAVE A STORM DAMAGE
ASSESSMENT CONDUCTED ON TUESDAY.

ANOTHER TORNADIC THUNDERSTORM WAS ASSOCIATED WITH A SECOND SUPERCELL
UNRELATED TO THE DYER COUNTY SUPERCELL. THE TORNADO TOUCHED DOWN JUST
SOUTH OF THE OBION COUNTY LINE AND JUST NORTH OF WEATHERFORD. THIS
TORNADO THEN MOVED SOUTHEAST TRACKING APPROXIMATELY 10 MILES AND
DISSIPATED NEAR THE INTERSECTION OF CHINA GROVE ROAD AND HIGHWAY
105. PRELIMINARY ASSESSMENTS RATE THIS TORNADO AS AN F3 ON THE
FUJITA SCALE WITH WINDS ESTIMATED AT 200 MPH AND A WIDTH OF UP TO
ONE HALF MILE. SEVERAL HOMES WERE DESTROYED WITH MANY AUTOMOBILES
TOSSED AND THROWN INTO FIELDS. EIGHT FATALITIES WERE REPORTED IN
BRADFORD WITH APPROXIMATELY 50 INJURIES.

PRELIMINARY ASSESSMENT OF HAYWOOD COUNTY TORNADO:

ANOTHER TEAM SURVEYED DAMAGE FROM A TORNADIC THUNDERSTORM IN
BROWNSVILLE TENNESSEE. THIS TORNADO WAS ESTIMATED TO BE AN F2 ON THE
FUJITA SCALE WITH A WIDTH OF 30 YARDS AND LENGTH OF THREE QUARTERS
OF A MILE.


FUJITA TORNADIC DAMAGE SCALE

F0.....60-73 MPH...LIGHT DAMAGE
F1....73-112 MPH...MODERATE DAMAGE
F2...113-157 MPH...CONSIDERABLE DAMAGE
F3...158-206 MPH...SEVERE DAMAGE
F4...207-260 MPH...DEVASTATING DAMAGE
F5...261-318 MPH...INCREDIBLE DAMAGE
$$
CJC/RJO/DNV/JEB/JFB
Posted by   www
on April 3, 2006, 8:23 pm
Based on my years of research experience (based on Dr Fujita's criteria) and aerial video footage I saw on CNN this afternoon, I'd rate the Dyer and Gibson county tornadoes as being of at least F4 intensity. I saw at least two homes which appeared to be new and of considerable size in which only the concrete slab remained; the home swept completely off the foundation (debris scattered along the tornado path beyond). Just as the Peachtree City/ Atlanta WSFO, the Memphis office also IMO tends to rate tornado intensity in their CWA on the conservative side.

IMO if the two (possibly three) Dyer and Gibson county, TN tornadoes had occurred in either the Birmingham (KBMX) or Jackson (KJAN) CWA, they would be rated as F4 tonight. These were extremely large and intense tornadoes.....why IMO we saw such a large death toll in an area where most residents are tornado-savvy (an area where several violent tornadoes have struck during the past decade).


Reply to this comment
Posted by  
on April 4, 2006, 8:02 am
Peachtree City has been better recently at rating tornadoes. The January 2 assessments seemed on point, rating tornadoes just south of Atlanta at F2 and F3:

http://www.srh.noaa.gov/ffc/html/tor010206b.shtml

Reply to this comment
Posted by   www
on April 3, 2006, 9:06 pm
Cool to hear about the strength of the tornadoes. NOT SO COOL for the deaths, not at all, but that’s just what happens when things like this happen. This is just the very first part of the season. Wonder what’s to come?



Reply to this comment
Posted by  
on April 3, 2006, 10:23 pm
JUST GOT A E MAIL FROM PHIL KLOZBATCH OF THE TROPICAL METEROLOGY PROJECT. THE APRIL 4 UPDATE FOR THE 2006 HURRICANE SEASON IS ON THE WEBSITE. BY THE WAY, THE GULF IS RUNNING 1 TO 2 DEGREES ABOVE NORMAL. FOR EVERY DEGREE, THE WINDS RISE 10-15 MPH. HERE IS THE LINK:

http://tropical.atmos.colostate.edu/forecasts/


Reply to this comment
Posted by  
on April 3, 2006, 10:33 pm
BRIAN, NIGHTLINE MENTIONED THE DREADED "GLOBAL WARMING" DURING THEIR LIVE REPORT ON LAST NIGHT TORNADOES.

Reply to this comment
Posted by   www
on April 3, 2006, 11:42 pm
I remember folks blamed the April 3, 1974 Superoutbreak on all sorts of weird things.......NASA's Skylab program, UFO's, air and water pollution, too many vehicles on the highway on stormy days (causing "air to spin";). About the same time, someone came up with the warped idea that tuning a tv set to VHF channel 2 (or was it channel 3) and completely darkening the screen would alert you of an approaching tornado (claimed the dark tv screen would suddenly brighten); in reality doing so was extremely dangerous (having a television on during severe t-storms due to the lightning danger).

If ya'll think folks are kooky nowadays, it may have been even worse back then. The Superoutbreak really spooked folks; I heard radio preachers saying it was a sign the end was near......heard enviromentalists claiming air pollution was making tornadoes more frequent and violent; all kinds of wacko stuff born out of fear.


Reply to this comment
Posted by   www
on April 4, 2006, 1:06 am
That was the Weller method of tornado detection. First promoted in 1968. Sounded good and works in theory...bad idea in practice. Works by detection of electrical discharges within about a 20 mile radius. But...since some tornadic storms don't contain lots of lightning, such a tornado would go undetected. Also, lots of false alarms from non tornadic storms if they are producing heavy lightning.

1971 article on Weller method:
http://www.motherearthnews.com/library/1971_May_June/How_To_Track
_a_Tornado


noaa's thoughts on that:
http://www.wrh.noaa.gov/hnx/svrwx6.php

Reply to this comment