[cifnmedia] Tornado now an F-4

  • From: Lawrence Estep <wxguy.geo@xxxxxxxxx>
  • To: CIFN_Weather@xxxxxxxxxxxxxxxx, cifnmedia@xxxxxxxxxxxxx
  • Date: Thu, 15 Jul 2004 23:45:16 -0500

NOUS43 KILX 160404 AAA
PNSILX
ILZ027>031-036>038-040>057-061>063-066>068-071>073-162300-

PUBLIC INFORMATION STATEMENT...UPDATED
NATIONAL WEATHER SERVICE LINCOLN IL
1100 PM CDT WED JUL 15 2004

...SURVEY RESULTS OF ROANOKE TORNADO ON JULY 13...

...DAMAGE RATED AT F4 ON THE FUJITA TORNADO INTENSITY SCALE...

PERSONNEL FROM A NATIONAL WEATHER SERVICE QUICK RESPONSE TEAM AND
THE NATIONAL WEATHER SERVICE OFFICE IN LINCOLN...ALONG WITH THE
WOODFORD COUNTY ESDA...CONDUCTED DAMAGE SURVEYS ON JULY 14 AND JULY
15 OF THE ROANOKE TORNADO WHICH OCCURRED ON JULY 13. HERE ARE THE
RESULTS.

PEAK INTENSITY:      F4
PATH LENGTH:         9.6 MILES
AVERAGE PATH WIDTH:  400 YARDS
MAXIMUM PATH WIDTH:  .25 MILES
TIME ON GROUND:      23 MINUTES

THE MOST SEVERE DAMAGE WAS RATED AT F4 ON THE FUJITA TORNADO
INTENSITY SCALE WITH AN ESTIMATED WIND SPEED OF 210 TO 240 MPH. THE
F4 DAMAGE AREA EXTENDED FROM THE PARSON'S MANUFACTURING PLANT (AT
THE JUNCTION OF STATE HIGHWAYS 116 AND 117 - 4 MILES WEST OF
ROANOKE) EASTWARD FOR 1 MILE. BESIDES THE PLANT...THIS AREA INCLUDED
FOUR FARMSTEADS.

THE TORNADO TOUCHED DOWN AROUND 234 PM CDT APPROXIMATELY 1.75 MILES
NORTH-NORTHEAST OF METAMORA...IN WESTERN WOODFORD COUNTY. THE
TORNADO TRAVELED SOUTHEAST FOR ABOUT 2.5 MILES, BEFORE BEGINNING A
TEMPORARY EASTWARD JOG BETWEEN COUNTY ROADS 1300E AND 1400E. THE
TORNADO CURVED SOUTHEAST AGAIN...STRIKING THE PARSONS MANUFACTURING
PLANT AROUND 241 PM CDT. THE PLANT WAS SEVERELY DAMAGED BY THE
TORNADO. APPROXIMATELY 140 PEOPLE WERE IN THE PLANT AT THE
TIME...BUT ALL PERSONNEL MADE IT TO STORM SHELTERS IN TIME
(APPROXIMATELY 3 TO 5 MINUTES BEFORE THE TORNADO ARRIVED). STEEL
BEAMS AND METAL SIDING FROM THE PLANT WERE FOUND APPROXIMATELY 3/4
MILE EAST IN A FARM FIELD.

FROM THE PLANT...THE TORNADO CONTINUED EAST...JUST SOUTH OF HIGHWAY
116/117...AFFECTING 4 FARMSTEADS APPROXIMATELY 1/2 TO 1 MILE EAST OF
THE PLANT. TWO OF THE FARMSTEADS CLOSEST TO THE PLANT (ABOUT 1/2 TO
3/4 MILE EAST) HAD THE 2-STORY HOUSES COMPLETELY BLOWN AWAY...WITH
ONLY DEBRIS REMAINING IN THE BASEMENTS AND NEARBY PROPERTY. THE
OTHER TWO FARMSTEADS HAD SIGNIFICANT DAMAGE TO THE 2-STORY
HOUSES...WITH OUTBUILDINGS DEMOLISHED. THE CENTER OF THE TORNADO
TRACKED ABOUT 100 YARDS SOUTH OF THE HOUSES LOCATED ON THE SOUTH
SIDE OF THE ROAD.

FROM THE PLANT TO THE FARMSTEADS...THE AVERAGE WIDTH OF THE TORNADO
WAS 400 YARDS...AND WAS CLOSE TO 1/4 MILE WIDE AT TIMES. THE
GREATEST TORNADO INTENSITY WAS DURING THIS APPROXIMATELY 1 MILE
STRETCH AND HAS BEEN RATED F4 ON THE FUJITA TORNADO INTENSITY SCALE
BY THE NATIONAL WEATHER SERVICE.

AT THIS POINT...THE TORNADO BEGAN TO MOVE MORE EAST-SOUTHEAST...AND
CAUSED SIGNIFICANT DAMAGE TO A BARN NEAR THE INTERSECTION OF COUNTY
ROADS 1300N AND 1600E...ABOUT 2.5 MILES SOUTHWEST OF ROANOKE. THE
TORNADO CONTINUED TO MOVE EAST-SOUTHEAST AND DAMAGED A HOUSE ABOUT
1.25 MILES SOUTH-SOUTHWEST OF ROANOKE...NEAR THE INTERSECTION OF
COUNTY ROADS 1300N AND 1700E. THE TORNADO CROSSED 1300N SHORTLY
AFTERWARD...AND CURVED SHARPLY TO THE SOUTHEAST. THE TORNADO LIFTED
AROUND 274 PM ABOUT 2 MILES SOUTHEAST OF ROANOKE...AT COUNTY ROAD
1900E.

FUJITA (F-SCALE) INTENSITIES:

F0     40-72   MPH
F1     73-112  MPH
F2     113-157 MPH
F3     158-206 MPH
F4     207-260 MPH
F5     261-318 MPH

$$
PRZYBYLINSKI/MILLER/KELLY/AUTEN/GEELHART







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