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PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
533 PM CDT TUE APR 4 2006

...DAMAGE SURVEY INFORMATION FOR THE APRIL 2 2006 TORNADO NEAR
CLARENCE CANNON DAM AT MARK TWAIN LAKE IN WEST CENTRAL RALLS COUNTY
IN MISSOURI...

PERSONNEL FROM THE NATIONAL WEATHER SERVICE OFFICE IN ST. LOUIS
CONDUCTED A SURVEY OF THE DAMAGE THAT OCCURRED FROM A NON-
SUPERCELLULAR TORNADO PRODUCED ON THE LEADING EDGE OF A SQUALL
LINE.

THE TORNADO TOUCHED DOWN AROUND 425 PM CDT 1.5 MILES NORTH OF
CLARENCE CANNON DAM ON COUNTY HIGHWAY J.  THREE BUSINESSES AT THIS
LOCATION SUSTAINED DAMAGE.  A CONVENIENCE STORE SUFFERED MINOR
EXTERIOR DAMAGE SUCH AS SHINGLES...SIDING...WINDOWS AND TRIM.  A
POLE BARN SUFFERED SUBSTANTIAL ROOF DAMAGE FROM AN AIRBORNE CAMPER
FROM AN OUTDOOR STORAGE LOT TO THE EAST.  DAMAGE FROM THIS BUILDING
WAS SCATTERED 200-300 FEET. FOUR CAMPERS IN THE OUTDOOR LOT WERE
DAMAGED WITH TWO OF THESE BEING COMPLETELY DESTROYED.  TWO BOATS WERE
FLIPPED OVER.

A CAMPER DEALERSHIP WAS LOCATED DIRECTLY ACROSS HIGHWAY J.  THIS
BUILDING SUSTAINED EXTENSIVE DAMAGE.  AN ATTACHED SERVICE BAY TO THE
SOUTH WAS COMPLETELY LEVELED.  THE SECOND STORY ABOVE THE OFFICE WAS
OBLITERATED WITH ONLY THE WEST FACING WALL LEFT STANDING.  THIRTY
PLUS CAMPERS SUSTAINED SOME TYPE OF DAMAGE. EIGHT TO TEN WERE
COMPLETELY DESTROYED. SOME OF THE CAMPER FRAMES WERE FOUND 150 TO
200 FEET NORTH OF THEIR INITIAL POSITIONS. DEBRIS FROM THIS AREA WAS
SCATTERED OVER 1/4 MILE AWAY.  THREE MISSILES /1X3 INCH BOARDS/ WERE
FOUND IN THE DEALERSHIPS HARD PACKED GRAVEL LOT.

THERE WAS SUBSTANTIAL TREE DAMAGE.  CEDAR TREES WITH A DIAMETER OF
12 TO 15 INCHES WERE SNAPPED OFF AT GROUND LEVEL BORDERING THE
DEALERSHIP LOT.

THE TORNADO WAS 1000 FEET WIDE AT THIS LOCATION AND PRODUCED F-2
DAMAGE.

THE TORNADO CONTINUED NORTHEAST FOR 1.3 MILES AND DAMAGED A
POLE BARN ON CLINTON ROAD. THE POLE BARN SUFFERED LIGHT ROOF AND TRIM
DAMAGE. SOUTHWEST OF THE POLE BARN...AN ISOLATED CEDAR TREE 1.5 TO 2
FEET IN DIAMETER SNAPPED OFF 3 FEET ABOVE THE GROUND.  THE TOP
PORTION OF THE TREE WAS FOUND 150 FEET NORTHEAST.

THE TORNADO WAS 300 FEET WIDE AT THIS LOCATION AND PRODUCED F-1
DAMAGE.

THE TORNADO CONTINUED 1.7 MILES NORTHEAST PASSING THROUGH THE SALT
RIVER VALLEY.  ON TOWNSHIP ROAD CC, THERE WAS A 2 FOOT SQUARE METAL
SIGN BURIED 4-6 INCHES INTO A TILLED FIELD.

AT THIS LOCATION...THE TORNADO WAS 100 FEET WIDE AND PRODUCED F-0
DAMAGE.

THE TORNADO DISSIPATED JUST NORTHEAST OF THIS LOCATION.

TOTAL LENGTH ...3.2 MILES.
MAXIMUM WIDTH...1000FEET
DAMAGE INTENSITY...F2

$$

BM/KS

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