------Original Message------
From: scoa42500{at}aol.com
To: WISCONSINWX{at}egroups.com, WEATHERFUN{at}egroups.com
Sent: August 25, 2000 4:57:20 AM GMT
Subject: [WEATHERFUN] IL DAMAGE SURVEY
ABUS34 KSPI 242241 COR
PNSSPI
PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
540 PM CDT THU AUG 24 2000
...DAMAGE SURVEY RESULTS FROM STORMS IN MCLEAN COUNTY ON AUGUST
23RD...
ON THE EVENING OF AUGUST 23RD...THUNDERSTORMS DEVELOPED RAPIDLY OVER
NORTHEAST TAZEWELL COUNTY IN CENTRAL ILLINOIS. THE STORMS MOVED
EAST-SOUTHEAST INTO MCLEAN COUNTY. THE STORMS REACHED SEVERE INTENSITY
...PRODUCING 1 INCH DIAMETER HAIL AND WIND DAMAGE WEST OF
BLOOMINGTON/NORMAL. POSSIBLE TORNADO DAMAGE WAS REPORTED WEST OF
BLOOMINGTON/NORMAL.
ON THE MORNING OF AUGUST 24TH...A STORM DAMAGE SURVEY WAS CONDUCTED
BY NATIONAL WEATHER SERVICE STAFF MEMBERS JEFF HEDGES (SCIENCE
OFFICER) AND JAMES AUTEN (LEAD METEOROLOGIST). THE RESULTS OF THE
STORM SURVEY FOLLOW.
THE FIRST INDICATION OF WIND DAMAGE WAS OBSERVED JUST SOUTH OF
DANVERS...IN NORTHWEST MCLEAN COUNTY. SMALL PATCHES OF CORN WERE
BLOWN DOWN ALONG AN IRREGULAR PATH TO THE SOUTHEAST EXTENDING FOR
ABOUT 3 MILES. MINOR TREE DAMAGE WAS ALSO OBSERVED ALONG THIS PATH.
THIS APPEARED TO BE DUE TO AN INTERMITTENT MICROBURST. FROM THE 3
MILE POINT IN THE TRACK...A TORNADO SPUN UP CUTTING A 260 FT WIDE
TRACK THROUGH A MATURE CORN FIELD. THE CORN WAS ENTIRELY FLATTENED
WITH THE STALKS ALONG THE SOUTHERN EDGE POINTING EAST AND THE STALKS
ALONG THE NORTHERN EDGE POINTING WEST. THE TORNADO CROSSED A COUNTY
ROAD DESTROYING SEVERAL MATURE TREES AND DEMOLISHING A SMALL
SHEET-METAL SHED. THE HOUSE ON THE PROPERTY SUFFERED ONLY SUPERFICIAL
DAMAGE TO SOME TRIM. THE TREES WERE SNAPPED AT THE TRUNKS...MANY
MORE THAN 2 FEET IN DIAMETER. THE TORNADO CONTINUED SOUTHEAST TO
ANOTHER HOMESTEAD...AGAIN DESTROYING NUMEROUS LARGE MATURE TREES AND
SOME RAIL FENCING. SHEET METAL FROM THE SHED ON THE FIRST HOMESTEAD
WAS SCATTERED ABOUT THE SECOND HOMESTEAD...TRAVELING ABOUT 300 YARDS.
THE HOUSE ON THE SECOND HOMESTEAD WAS UNDAMAGED...AS THE TORNADO
PASSED SLIGHTLY SOUTH OF ITS LOCATION. THE TORNADO THEN REACHED
DENSE FOREST ...WHERE SURFACE FRICTION DISSIPATED THE VORTEX.
SPORADIC TREE DAMAGE WAS ALL THAT WAS OBSERVED FOR THE REMAINDER OF
THE DAMAGE TRACK AND APPEARED TO BE THE RESULT OF MICROBURST WINDS.
THE LAST DAMAGE NOTED WAS MINOR TREE DAMAGE ABOUT 3 MILES WEST OF
THE INTERSECTION OF ILLINOIS ROUTE 9 AND I-55.
THE TOTAL DAMAGE PATH LENGTH WAS ESTIMATED TO BE 5.2 MILES. THE
LENGTH OF THE TORNADIC PORTION OF THE TRACK WAS ESTIMATED TO BE
ABOUT 2300 FEET. MAXIMUM INTENSITY OF THE TORNADIC WINDS WERE ESTIMATED
TO BE 90 TO 100 MPH...PLACING IT IN THE F-1 CATEGORY ON THE FUJITA
SCALE.
JEFFREY R. HEDGES
SCIENCE & OPERATIONS OFFICER
NATIONAL WEATHER SERVICE
LINCOLN IL$$
*************************************************
*************************************************
Thanks
John Jensen KB9KQN Woodstock,IL
STORM CHASERS OF AMERICA
http://www.stormchasersofamerica.org
*************************************************
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