Preliminary Storm Survey Results for the April 20th, 2004 Putnam & Bureau County Tornadoes

 

Public Information Statement

Local Storm Report

Storm Track Map

Pictures of the event.

Link to Chicago NWS & Central Illinois NWS for further information on the Northern Illinois Tornados

 

 

Public Information Statement

000
ABUS34 KMLI 212134
PNSMLI

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
435 PM CDT WED APR 21 2004

...NATIONAL WEATHER SERVICE SURVEYS GRANVILLE ILLINOIS TORNADO...

ON TUESDAY APRIL 20TH BETWEEN 515 PM AND 6 PM...SEVERAL TORNADOES
MOVED NORTHEAST THROUGH SOUTHERN BUREAU AND PUTNAM COUNTIES IN
ILLINOIS.

IN SOUTHERN BUREAU COUNTY...A TORNADO WAS ON THE GROUND ABOUT 1.5
MILES AND WAS ABOUT 100 YARDS WIDE, DAMAGING A BARN...SEVERAL
OUTBUILDINGS AND THE ROOF OF A FARMHOUSE ON A FARM. A GROUND SURVEY
OF THE DAMAGE ESTIMATED THE WIND AT 70 MPH...WHICH WOULD CATEGORIZE
THE TORNADO AS AN F-0 ON THE FUJITA TORNADO DAMAGE SCALE.

IN PUTNAM COUNTY...A TORNADO TOUCHED DOWN OVER RURAL AREAS ABOUT 2
MILES EAST OF HENNIPEN...AND TRAVELED NORTHEAST INTO GRANVILLE. THE
TORNADO CAUSED SIGNIFICANT DAMAGE TO BUSINESSES...HOMES...AND CITY
BUILDINGS IN GRANVILLE. EYEWITNESSES REPORTED THAT THIS TORNADO HAD
MULTIPLE VORTICIES IN THE VICINITY OF GRANVILLE. THE TORNADO CAUSED
DAMAGE THAT RESULTED IN WIND ESTIMATES NEAR 150 MPH IN NORTHERN
GRANVILLE. THE TORNADO REMAINED ON THE GROUND ACROSS THE COUNTY LINE
INTO LASALLE COUNTY...3 MILES NORTHEAST OF STANDARD. IN RURAL
AREAS...EXTENSIVE DAMAGE WAS CAUSED TO SEVERAL FARMS. WIND
ESTIMATES SHOW THAT WINDS CAUSING THIS DAMAGE WERE NEAR 157 MPH...OR
A HIGH LEVEL F-2 TORNADO. THIS TORNADO LATER CAUSED DAMAGE TO
LASALLE COUNTY ILLINOIS.

THIS DAMAGE SURVEY WAS CONDUCTED BY MIKE MCCLURE...ANDY ERVIN...AND
SCOTT DOERING.
SPECIAL THANKS TO ILLINOIS LAW ENFORCEMENT...LOCAL GOVERNMENT OF
GRANVILLE...AND CITIZENS OF GRANVILLE.

ERVIN

$$

Local Storm Report

000
NWUS53 KDVN 212048
LSRDVN

PRELIMINARY LOCAL STORM REPORT ... SUMMARY
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
348 PM CDT WED APR 21 2004

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..

0715 PM TORNADO 2 S DELMAR 41.97N 90.61W
04/20/2004 CLINTON IA LAW ENFORCEMENT

BUILDINGS DOWN AT 150TH STREET AND HIGHWAY 61.


0708 PM TORNADO 4 N WELTON 41.97N 90.60W
04/20/2004 CLINTON IA LAW ENFORCEMENT


0558 PM HAIL IOWA CITY 41.66N 91.54W
04/20/2004 0.50 INCH JOHNSON IA TRAINED SPOTTER


0547 PM TORNADO GRANVILLE 41.26N 89.23W
04/20/2004 PUTNAM IL TRAINED SPOTTER

ROOF BLOWN OFF BANK AND TREES DOWN



&&
SURVEY RESULTS FOR CLINTON COUNTY IOWA AND PUTNAM COUNTY ILLINOIS
AVAILABLE ON THE INTERNET AT www.crh.noaa.gov/dvn/
$$

DUBBERKE

Storm Track Map

Pictures

Boards stuck in ground. Projectiles from Granville Tornado.

High-end F-2 damage. Garage taken off foundation, car blown out of garage. From Granville.
 
Flattened garage.
 
 
 
Devastated farm northeast of Granville. High-end F-2 damage.
Granville gymnasium with out roof.
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