...SOUTHWEST IOWA TORNADO SURVEY INFORMATION...

THE NATIONAL WEATHER SERVICE CONDUCTED A SURVEY OF STORM DAMAGE
THAT OCCURRED SATURDAY EVENING ACROSS SOUTHWEST IOWA. THREE TORNADO
TRACKS MOVED ACROSS FREMONT COUNTY THROUGH PARTS OF MILLS....
MONTGOMERY AND POTTAWATTAMIE COUNTIES.

THE FIRST TORNADO STARTED 3 MILES WEST OF SHENANDOAH AND MOVED
NORTHEAST TO 3 MILES NORTHEAST OF IMOGENE AND WAS RATED EF1 ON THE
ENHANCED FUJITA SCALE. THE SECOND TORNADO STARTED 5 MILES NORTH OF
EMERSON AND TRACKED NORTH NORTHEAST TO 4 MILES EAST OF CARSON.
THIS WAS RATED EF2. THE THIRD TORNADO BEGAN ONE AND ONE HALF MILES
EAST OF OAKLAND AND TRACKED TO 4 MILES NORTHEAST OF OAKLAND.  THIS
TORNADO WAS RATED EF1.

IN ADDITION TO THE TORNADO TRACKS...SIGNIFICANT WIND DAMAGE ALSO
OCCURRED NORTH AND WEST OF CLARINDA.

ADDITIONAL INFORMATION ON THESE TORNADOES WILL BE DISSEMINATED IN A
PUBLIC INFORMATION STATEMENT ON MONDAY.

Additionally, four tornadoes were confirmed in Knox county in Northeast Nebraska.

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
840 PM CDT SUN MAY 6 2007

...TORNADOES CONFIRMED IN KNOX COUNTY...

IN COOPERATION WITH EMERGENCY MANAGEMENT OFFICIALS IN KNOX COUNTY...
THE NATIONAL WEATHER SERVICE IN OMAHA/VALLEY SURVEYED PARTS OF KNOX
COUNTY. THE SURVEY CONFIRMED AT LEAST 4 TORNADOES. THE PRELIMINARY
INFORMATION ON THE TORNADOES IS LISTED BELOW.

ALL INFORMATION IS PRELIMINARY AND WAS SOMEWHAT AFFECTED BY LIMITED
ACCESS FOR THE SURVEY DUE TO MUDDY ROADS...SOME OF WHICH WERE
IMPASSIBLE WITH A NORMAL VEHICLE.

TORNADO #1
STARTED: ABOUT 1.5 MILES SOUTHEAST OF BLOOMFIELD
ENDED: ABOUT 4 MILES NORTH NORTHEAST OF BLOOMFIELD
PATH LENGTH: ABOUT 5.5 MILES
MAX PATH WIDTH: 150 YARDS
DAMAGE RATING: EF0
DEATHS: NONE
INJURIES: NONE
DAMAGE DESCRIPTION:TORNADO APPARENTLY STARTED SOUTHEAST OF
BLOOMFIELD WHERE A CENTER PIVOT WAS FLIPPED. TREE AND BUILDING
DAMAGE CONTINUED FROM THIS AREA NORTHWARD. TORNADO DAMAGE
SIGNALS WERE LESS CLEAR FARTHER NORTH BUT THERE WAS SOME MINOR
DEBRIS.

TORNADO #2
STARTED: ABOUT 4 MILES EAST AND 3 MILES NORTH OF BLOOMFIELD
ENDED 3 MILES WEST AND 2.5 MILES NORTH OF CROFTON
PATH LENGTH: ABOUT 8.75 MILES
MAX PATH WIDTH: 1/4 OF A MILE
DAMAGE RATING: EF1
DEATHS: NONE
INJURIES: NONE
DAMAGE DESCRIPTION:TORNADO APPARENTLY STARTED NORTHEAST OF
BLOOMFIELD WHERE IT DAMAGED THE ROOF OF A HOG CONFINEMENT. THE
TORNADO CONTINUED NORTHWARD DAMAGING TREES...BUILDINGS AND POWER
LINES. AT LEAST ONE CENTER PIVOT WAS DAMAGED. SOME HOMES HAD
DAMAGE. THE WORST DAMAGE SEEMED TO BE ABOUT 3 MILES WEST OF
CROFTON CLOSE TO WHERE IT CROSSED HIGHWAY 12. IT APPEARS THAT
THIS TORNADO ENDED AND TORNADO #3 BELOW STARTED JUST ABOUT A
MILE TO THE EAST.

TORNADO #3
STARTED: 2 MILES WEST AND 2.5 MILES NORTH OF CROFTON
ENDED: TORNADO MOVED ONTO LEWIS AND CLARK LAKE AT WEIGAND
MARINA. IT MAY HAVE CONTINUED IN SOUTH DAKOTA.
PATH LENGHT: ABOUT 5 MILES
PATH WIDTH: 3/10 OF A MILE
DAMAGE RATING: EF2
DEATHS: NONE
INJURIES: 2 OR 3 MINOR INJURIES
DAMAGE DESCRIPTION:TORNADO APPARENTLY STARTED NORTHWEST
OF CROFTON WHERE A GRAIN BIN WAS DAMAGED. TORNADO MOVED
NORTH NORTHWEST...HITTING TWO OR THREE LARGE POWER LINE
SUPPORT STRUCTURES. EXTENSIVE DAMAGE TO TREES AND POWER
LINES OCCURRED SOUTH OF WEIGAND. AT THE MARINA...THERE
WAS CONSIDERABLE DAMAGE TO TREES. A STORAGE BUILDING OR
SHOP WAS SEVERELY DAMAGED...A HOME HAD SOME ROOF DAMAGE...
CAMPERS WERE DAMAGED OR OVERTURNED...BOATS WERE DAMAGED...
PARTIALLY SUNK OR MISSING. INJURIES APPARENTLY OCCURRED
JUST SOUTH OF THE MARINA ALONG HIGHWAY 121.

TORNADO #4
STARTED: ABOUT 2 MILES EAST AND 4 MILES NORTH OF CENTER
ENDED: ABOUT 1 MILE WEST OF SANTEE
PATH LENGTH: ABOUT 11 MILES
PATH WIDTH: UNKNOWN
DAMAGE RATING: UNKNOWN...PROBABLY EF0
DEATHS: NONE
INJURIES: NONE
DAMAGE DESCRIPTION:SOME OLD FARM SITES RECEIVED DAMAGE
AS THE TORNADO TRACKED NORTH THROUGH A VERY RURAL AREA.
MOST ROADS IN THIS AREA ARE MINIMUM MAINTENANCE AND
ACCESS WAS VERY LIMITED. AN ATTEMPT WILL BE MADE TO GET
MORE INFORMATION IN THE NEXT DAY OR SO.

AN APPARENT MICROBURST ALSO OCCURED ABOUT 5 MILES WEST
OF BLOOMFIELD...WHICH CAUSED DAMAGED TO SOME TREES AND
TWO OR THREE LARGE POWER LINE SUPPORT STRUCTURES. A
CENTER PIVOT WAS DAMAGED. THE DAMAGE PATH WAS ABOUT
200 YARDS WIDE AND 1 OR 1.5 MILES LONG.