Tornadoes · United States · Illinois · 2006

F1 tornado, Warrensburg, Illinois, April 16, 2006

Name: F1 tornado, Warrensburg, Illinois, April 16, 2006
Start: 2006-04-16T19:35:00.000Z
Location: Warrensburg, Illinois

This F1 tornado ran 1.0 miles across Macon County on April 16, 2006, touching down at 2:35 PM CDT and reaching 100 yards wide. It killed nobody.

The rating scale

Tracks are drawn in the color of the rating. The Fujita scale rates the damage rather than measuring the wind: the speeds are what that damage is taken to imply.

F040 to 72 mph
Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.
F173 to 112 mphthis tornado
Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.
F2113 to 157 mph
Considerable damage. Roofs torn off well-built houses, frame homes shifted on their foundations, mobile homes destroyed, large trees snapped or uprooted, cars lifted off the ground.
F3158 to 206 mph
Severe damage. Whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, trees debarked, heavy cars lifted and thrown.
F4207 to 260 mph
Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.
F5261 to 318 mph
Incredible damage. Strong frame houses swept off their foundations, car-sized missiles thrown more than 100 meters, steel-reinforced concrete badly damaged, high-rise buildings deformed.
Unrated
The survey recorded a tornado but could not put a number on it, most often because it crossed open country and damaged nothing a rating can be read from.

The record

Rating: F1
Date: April 16, 2006
Touchdown: 2:35 PM CDT (19:35 UTC)
Path length: 1.0 miles (1.6 km)
Path width: 100 yards (91 m)
Deaths: 0
Injuries: 0
County: Macon County
Touchdown point: 39.920, -89.100
Lift-off point: 39.920, -89.080
Record number: 389

What the Weather Service recorded

The tornado completely destroyed an outbuilding and damaged one home, damaging siding and the roof.

From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.

The warnings

No tornado warning for this county appears in the archive as in force at the moment the tornado touched down. One was issued for the county at another hour that day.

The county was under a tornado watch, issued at 16:20 UTC and running to 00:00 UTC.

Issued (UTC)	Expired	Product	Office
16:20 UTC	00:00 UTC	Tornado Watch	ILX
19:27 UTC	20:15 UTC	Severe Thunderstorm Warning	ILX
19:33 UTC	20:15 UTC	Severe Thunderstorm Warning	ILX
19:53 UTC	20:30 UTC	Tornado Warning	ILX
20:14 UTC	21:00 UTC	Tornado Warning	ILX
21:27 UTC	22:00 UTC	Severe Thunderstorm Warning	ILX

Every warning and watch covering the touchdown point that day, from the Iowa Environmental Mesonet's archive of National Weather Service products. Lead time is measured from the issue of the warning in force to the touchdown time in the database, both of which were recorded to the minute by different people.

The forecast that day

The Storm Prediction Center had this point in a Moderate Risk, with a 0.15 chance of a tornado within 25 miles. The outlook in force was issued at 16:34 UTC.

SPC's Day 1 convective outlook as it stood when the tornado began, read at the touchdown point. The same archive is on the radar archive.

What forecasters said that day

The local office's own words before the tornado touched down, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Lincoln, IL wrote its last area forecast discussion before the tornado touched down at Apr 16, 12:11 PM CDT, 2 hours 24 minutes earlier.

Area forecast discussion, Apr 16, 12:11 PM CDT, 2 hours 24 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LINCOLN IL
1211 PM CDT SUN APR 16 2006

.DISCUSSION...
ONGOING SEVERE WEATHER MAIN CONCERN. ALREADY SPINNING UP FOR TOR
WATCH 193...SO WILL KEEP THIS SHORT.

SHORT TERM...THIS AFTERNOON AND TONIGHT...
SIGNIFICANT SHORTWAVE AND UPPER H5 TROUGH TO MOVE ACROSS THE CWA THIS
AFTERNOON AND EVENING. SPC HAS INCREASED THE DAY ONE TOR GRAPHIC TO
15% IN RESPONSE TO SHEAR PROFILES AND DESTABILIZATION TAKING PLACE
ACROSS THE C IL. RUC AND ETA 12 INDICATE STORMS ERUPTING EARLY THIS
AFTERNOON AND CONTINUING THROUGH LATE EVENING. SEVERAL LINES OF
STORMS ARE EXPECTED...WITH ROTATING SUPERCELLS LIKELY WITH POSSIBLE
STRONG TORNADOES. SPC MESOANALYSIS PAGE IS INDICATING THE BEST
CHANCES FOR SEVERE WEATHER SOUTHWEST OF A LINE FROM PEORIA TO
EFFINGHAM...ESPECIALLY IN THE SPRINGFIELD AND JACKSONVILLE AREA
EARLIER THIS AFTERNOON. AS THE SURFACE LOW PROGRESSES INTO C IL BY
00Z... WE WILL SEE THE CHANCES FOR SEVERE WEATHER EXPAND EASTWARD
INTO THE BLOOMINGTON...CHAMPAIGN AND DANVILLE AREAS.

THE SEVERE STORMS WILL LAST UNTIL 10 PM IN OUR EASTERN AREAS...BUT
SHOULD WEAKEN CONSIDERABLY AFTER MIDNIGHT...WHEN THE LOW WILL BE
INTO INDIANA...AND OUR AIRMASS WILL BEGIN TO DRY AND COOL AND ALL
LEVELS. KEPT THE SEVERE THUNDERSTORM WORDING IN THE GRIDS UNTIL
MIDNIGHT...BUT MAY BE ABLE TO CLEAR THE SEVERE THREAT FROM THE
ILLINOIS RIVER AREA BY EARLY THIS EVENING.

LONG TERM...MONDAY THROUGH SATURDAY...
HIGH PRESSURE WILL PUSH SOUTHWARD FROM THE WESTERN GREAT LAKES ON
MONDAY...ALLOWING FOR PRECIP TO MOVE SOUTH OF OUR CWA. THE TIMING
APPEARS TO BE A LITTLE SLOWER THAN YESTERDAYS MODELS...AND I PULLED
PRECIP FROM TUESDAY AFTERNOON...AND LOWERED THE CHANCES TUESDAY
EVENING. IT APPEARS THE PRE FRONTAL PRECIP WILL REACH OUR W CWA
BETWEEN MIDNIGHT AND 6 AM ON WEDNESDAY. THUNDERSTORMS WILL CONTINUE
INTO WEDNESDAY EVENING...AS THE FRONT SHEARS OUT AND SLOWS DOWN.
THE LONG WAVE TROUGH WILL LINGER TO OUR NW OVER THE SD/IA BORDER
UNTIL THURSDAY...SO I KEPT SLIGHT CHC POPS IN PRIMARILY THE NORTHERN
PORTION OF OUR CWA THROUGH FRIDAY. THE LOW WILL LINGER IN THE
CENTRAL EAST COAST OVER THE WEEKEND...WITH A TROUGH EXTENDING TOWARD
IL. HOWEVER...DRY CONDITIONS ARE EXPECTED TO PREVAIL AS THE SURFACE
RIDGE PROVIDES ENOUGH DRY AIR IN ILLINOIS.

&&

.ILX WATCHES/WARNINGS/ADVISORIES...
NONE.

&&

SHIMON

Hazardous weather outlook, Apr 16, 11:43 AM CDT, 2 hours 52 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LINCOLN IL
1143 AM CDT SUN APR 16 2006

ILZ027>031-036>038-040>044-047>054-061-171200-
KNOX-STARK-PEORIA-MARSHALL-WOODFORD-FULTON-TAZEWELL-MCLEAN-
SCHUYLER-MASON-LOGAN-DE WITT-PIATT-CASS-MENARD-SCOTT-MORGAN-
SANGAMON-CHRISTIAN-MACON-MOULTRIE-SHELBY-
1143 AM CDT SUN APR 16 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL ILLINOIS.

.DAY ONE...THIS AFTERNOON AND TONIGHT

THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON
AND TONIGHT.

A STRONG UPPER LEVEL LOW PRESSURE IN CENTRAL IOWA WILL MOVE
SOUTHEAST THIS AFTERNOON...ALONG A WARM FRONT EXTENDING ACROSS
CENTRAL ILLINOIS. THE LOW WILL COMBINE WITH WARM MOIST AIR SOUTH
OF THE FRONT...TO PRODUCE THUNDERSTORMS THIS AFTERNOON AND INTO
TONIGHT. TORNADOES ARE POSSIBLE ACROSS CENTRAL ILLINOIS THIS AFTERNOON
AND EARLY EVENING. LARGE HAIL OVER GOLFBALL SIZE...AND DAMAGING
WINDS OVER 70 MPH...ARE LIKELY.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

ANOTHER SYSTEM WILL MOVE INTO THE AREA TUESDAY NIGHT AND
WEDNESDAY...LEADING TO THE POSSIBILITY OF MORE THUNDERSTORMS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE REQUIRED THROUGH ABOUT 8 PM.

ILZ045-046-055>057-062-063-066>068-071>073-171200-
CHAMPAIGN-VERMILION-DOUGLAS-COLES-EDGAR-CUMBERLAND-CLARK-
EFFINGHAM-JASPER-CRAWFORD-CLAY-RICHLAND-LAWRENCE-
1143 AM CDT SUN APR 16 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL AND
SOUTHEAST ILLINOIS.

.DAY ONE...THIS AFTERNOON AND TONIGHT

A MODERATE RISK OF SEVERE THUNDERSTORMS IS IN PLACE THIS
AFTERNOON AND TONIGHT.

A STRONG UPPER LEVEL LOW PRESSURE IN CENTRAL IOWA WILL MOVE
SOUTHEAST THIS AFTERNOON...ALONG A WARM FRONT EXTENDING ACROSS
CENTRAL ILLINOIS. THE LOW WILL COMBINE WITH WARM MOIST AIR SOUTH
OF THE FRONT...TO PRODUCE THUNDERSTORMS THIS AFTERNOON AND INTO
TONIGHT. TORNADOES ARE POSSIBLE ACROSS EAST CENTRAL AND SOUTHEAST
ILLINOIS LATER THIS AFTERNOON AND EVENING. LARGE HAIL OVER
GOLFBALL SIZE...AND DAMAGING WINDS OVER 70 MPH...ARE LIKELY.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

ANOTHER SYSTEM WILL MOVE INTO THE AREA TUESDAY NIGHT AND
WEDNESDAY...LEADING TO THE POSSIBILITY OF MORE THUNDERSTORMS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS LIKELY...PRIMARILY BETWEEN 2 PM AND 10 PM.

GEELHART

In the hours before

Local storm report, Apr 16, 12:16 PM CDT, 2 hours 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
1216 PM CDT SUN APR 16 2006

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

0600 AM     HAIL             6 NNW CHAMPAIGN         40.19N 88.31W
04/16/2006  M0.75 INCH       CHAMPAIGN          IL   PUBLIC

            TIME ESTIMATED.

&&

GEELHART

Local storm report, Apr 16, 2:05 PM CDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
205 PM CDT SUN APR 16 2006

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

0147 PM     TSTM WND GST     SPRINGFIELD             39.78N 89.64W
04/16/2006  M59 MPH          SANGAMON           IL   ASOS

            59 MPH WIND GUST MEASURED AT SPRINGFIELD ABRAHAM LINCOLN
            CAPITOL AIRPORT.

0145 PM     TSTM WND DMG     2 W SPRINGFIELD         39.78N 89.68W
04/16/2006                   SANGAMON           IL   EMERGENCY MNGR

            POWER POLE DOWN AT INTERSECTION OF MOORE AND HAZLETT
            ROAD, APPROXIMATELY 2 MILES WEST OF AIRPORT.

0156 PM     HAIL             SHERMAN                 39.89N 89.61W
04/16/2006  M1.00 INCH       SANGAMON           IL   EMERGENCY MNGR

&&

GEELHART

Local storm report, Apr 16, 2:16 PM CDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
216 PM CDT SUN APR 16 2006

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

0213 PM     HAIL             6 SW MOUNT PULASKI      39.95N 89.36W
04/16/2006  M1.00 INCH       LOGAN              IL   CO-OP OBSERVER

            1 INCH HAIL REPORTED 1/2 MILE WEST OF LAKE FORK ROAD.

&&

GEELHART

Local storm report, Apr 16, 2:25 PM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
225 PM CDT SUN APR 16 2006

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

0221 PM     HAIL             DANVERS                 40.53N 89.17W
04/16/2006  E1.00 INCH       MCLEAN             IL   CO-OP OBSERVER

            COOP OBSERVER REPORTED 1 INCH HAIL NEAR DANVERS.

0221 PM     HAIL             STANFORD                40.43N 89.22W
04/16/2006  E1.75 INCH       MCLEAN             IL   EMERGENCY MNGR

            AT INTERSECTION OF ILLINOIS 9 AND RT 122 NEAR STANFORD
            GOLF BALL SIZE HAIL WAS REPORTED.

0221 PM     HAIL             STANFORD                40.43N 89.22W
04/16/2006  E1.75 INCH       MCLEAN             IL   EMERGENCY MNGR

            AT INTERSECTION OF ILLINOIS 9 AND RT 122 NEAR STANFORD
            GOLF BALL SIZE HAIL WAS REPORTED.

&&

OUSLEY

Local storm report, Apr 16, 2:31 PM CDT, 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
231 PM CDT SUN APR 16 2006

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

0220 PM     HAIL             CORNLAND                39.94N 89.41W
04/16/2006  E1.00 INCH       LOGAN              IL   TRAINED SPOTTER

            ONE INCH HAIL AND ESTIMATED 60 MPH WIND REPORTED.

0220 PM     HAIL             2 W NORMAL              40.52N 89.04W
04/16/2006  E1.00 INCH       MCLEAN             IL   TRAINED SPOTTER

&&

OUSLEY

The air that afternoon

The radiosonde launches on either side of the tornado, from the nearest station that was launching then, drawn and analyzed the way Storm Lab does: the same diagram, the same parcel and shear definitions SPC's mesoanalysis uses.

Lincoln, IL (KILX), 12:00Z

7.6 hours before the tornado, 49 km from the path. April 16, 2006.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed. The warm shading is its CAPE, the cool shading the inhibition it has to break through.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km. RM and LM are the right and left moving storms Bunkers' method gives; the shaded area is the 0 to 1 km storm-relative helicity.

Mixed-layer CAPE: 841 J/kg
Mixed-layer CIN: -218 J/kg
Surface CAPE: 480 J/kg
Mixed-layer LCL: 1072 m above ground
0-6 km bulk shear: 53 kt
0-1 km bulk shear: 24 kt
0-1 km storm-relative helicity: 241 m²/s²
0-3 km storm-relative helicity: 278 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.5
0-3 km lapse rate: 4.5 K/km

Open this sounding in Storm Lab

Lincoln, IL (KILX), 00:00Z

4.4 hours after it, 49 km from the path. April 17, 2006.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed. The warm shading is its CAPE, the cool shading the inhibition it has to break through.

Hodograph

Mixed-layer CAPE: 406 J/kg
Mixed-layer CIN: -24 J/kg
Surface CAPE: 2031 J/kg
Mixed-layer LCL: 1558 m above ground
0-6 km bulk shear: 39 kt
0-1 km bulk shear: 33 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: 18 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -1.2
0-3 km lapse rate: 7.7 K/km

Open this sounding in Storm Lab

The radar

The Lincoln radar (KILX), 33 km away, was scanning. The volume nearest the touchdown began at 19:35 UTC.

Open the radar archive at this moment, over the track

Reflectivity and velocity, decoded from the Level II archive in the browser. Volumes take a few seconds to open the first time.

What was reported nearby

Local storm reports within 60 km of the path, in the three hours either side.

Time (UTC)	Report	Where	County	Remark
18:45 UTC	TSTM WND DMG	2 Nw Springfield	Sangamon, IL	5 POWER POLES DOWN AND BARN DAMAGE AT 2168 MOORE ROAD.
18:45 UTC	TSTM WND DMG	2 W (Spi)Springfield Ar	Sangamon, IL	POWER POLE DOWN AT INTERSECTION OF MOORE AND HAZLETT ROAD, APPROXIMATELY 2 MILES WEST OF AIRPORT.
18:45 UTC	TSTM WND DMG	2 W Springfield	Sangamon, IL	POWER POLE DOWN AT INTERSECTION OF MOORE AND HAZLETT ROAD, APPROXIMATELY 2 MILES WEST OF AIRPORT.
18:45 UTC	TSTM WND DMG	4 Ne Riverton	Sangamon, IL	AT 7578 PRAIRIE SCHOOL ROAD A BARN COLLAPSED AND TRAPPED SOME LIVESTOCK.
18:45 UTC	TSTM WND DMG	5 N Buffalo	Logan, IL	AT 7833 BUFFALO HART ROAD STRUCTURE DAMAGE WAS REPORTED. ALSO AT 8535 BUFFALO HART ROAD A GRAIN BIN WAS DESTROYED.
18:45 UTC	TSTM WND DMG	Buffalo	Sangamon, IL	515 SOUTH WELLS IN BUFFALO A TREE LIMB FELL AND TOOK OUT POWER TO THE VILLAGE.
18:47 UTC	TSTM WND GST 59	(Spi)Springfield Arpt	Sangamon, IL	59 MPH WIND GUST MEASURED AT SPRINGFIELD ABRAHAM LINCOLN CAPITOL AIRPORT.
18:47 UTC	TSTM WND GST 59	Springfield	Sangamon, IL	59 MPH WIND GUST MEASURED AT SPRINGFIELD ABRAHAM LINCOLN CAPITOL AIRPORT.
18:56 UTC	HAIL 1	Sherman	Sangamon, IL
19:13 UTC	HAIL 1	6 Sw Mount Pulaski	Logan, IL	1 INCH HAIL REPORTED 1/2 MILE WEST OF LAKE FORK ROAD.
19:20 UTC	TSTM WND DMG	Stanford	Mclean, IL	ROOF OFF LOCAL COFFEE SHOP. POWER POLES DOWN.
19:20 UTC	HAIL 0.75	Mount Pulaski	Logan, IL
19:20 UTC	HAIL 1	Cornland	Logan, IL	ONE INCH HAIL AND ESTIMATED 60 MPH WIND REPORTED.
19:21 UTC	HAIL 1.75	Stanford	Mclean, IL	AT INTERSECTION OF ILLINOIS 9 AND RT 122 NEAR STANFORD GOLF BALL SIZE HAIL WAS REPORTED.
19:35 UTC	TORNADO 1	2 Sw Warrensburg	Macon, IL	PATH LENGTH 1 MILE, WIDTH 100 YARDS. FARM SHED DESTROYED, 6X6 BEAMS SNAPPED, DAMAGE TO HOUSE ABOUT A QUARTER MILE EAST OF THE SHED. EVIDENCE OF DAMAGED CAUSED BY PROJECTILES. ESTIMATED PEAK WIND SPEED 120 MPH.
19:45 UTC	FUNNEL CLOUD	1 N Decatur	Macon, IL	A FUNNEL CLOUD WAS REPORTED BETWEEN DECATUR AND FORSYTH.
19:45 UTC	FUNNEL CLOUD	Niantic	Macon, IL	A FUNNEL CLOUD WAS REPORTED OVER NIANTIC AT 245 PM.
19:48 UTC	TSTM WND GST 60	Warrensburg	Macon, IL
20:08 UTC	TORNADO	2 W Assumption	Christian, IL	BRIEF TOUCHDOWN OF A TORNADO WITH NO DAMAGE REPORTED.
20:09 UTC	FUNNEL CLOUD	Long Creek	Macon, IL	FUNNEL CLOUD REPORTED NEAR ROUTE 121 AND US HWY 36.
20:18 UTC	FUNNEL CLOUD	Oreana	Macon, IL
20:20 UTC	TSTM WND DMG	Oakley	Macon, IL	HOUSE DAMAGED, GARAGE DESTROYED. 4 CEDAR TREES SNAPPED OFF.
20:26 UTC	TSTM WND GST 60	Cisco	Piatt, IL	60 MPH GUST REPORTED BY PIATT COUNTY SHERIFF.
20:30 UTC	TORNADO	7 N Assumption	Christian, IL	TORNADO REPORTED BY ELECTED OFFICIAL.
20:35 UTC	TSTM WND DMG	Harristown	Macon, IL	HOMES WERE DAMAGED IN THE VILLAGE OF HARRISTOWN.
20:35 UTC	TSTM WND DMG	Long Creek	Macon, IL	HOMES WERE REPORTED DAMAGED IN LONG CREEK.
20:38 UTC	HAIL 0.75	Decatur	Macon, IL	PENNY SIZE HAIL REPORTED AT ROUTE 48 AND SOUTHSIDE DRIVE.
20:58 UTC	TSTM WND DMG	3 S Seymour	Champaign, IL	4 POWER POLES SNAPPED
20:58 UTC	HAIL 0.75	Monticello	Piatt, IL	3/4 INCH HAIL REPORTED AT I74 AND BRIDGE STREET INTERSECTION.
20:58 UTC	HAIL 0.75	Monticello	Piatt, IL
21:30 UTC	HAIL 0.75	3 Se (Dec)Decatur Arpt	Macon, IL	PENNY SIZE HAIL 3.5 MILES SOUTHEAST OF AIRPORT.
21:35 UTC	HAIL 0.75	Sullivan	Moultrie, IL	MOULTRIE COUNTY SHERIFF REPORTED 3/4 INCH HAIL IN SULLIVAN.
22:15 UTC	TSTM WND DMG	2 W Warrensburg	Macon, IL	DURING THE LATE AFTERNOON A MACHINE SHED WAS DAMAGED AND A HOUSE PARTIALLY DESTROYED. DEBRIS FROM THE DAMAGE WAS SPREAD 1/2 MILE.
22:15 UTC	TSTM WND DMG	Oakley	Macon, IL	DURING THE LATE AFTERNOON 6 HOMES WERE DAMAGED...2 SEVERELY AT INTERSECTION OF PRAIRIE ROAD AND COUNTY ROAD 24.

From the Iowa Environmental Mesonet's archive of National Weather Service local storm reports.

This ground now

The live radar over the track Every 2006 tornado in Illinois Every tornado in Illinois since 1950 Warnings in force in Illinois now The forecast where you are

The other tornadoes of April 16, 2006

13 more were confirmed in the United States that day.

Date	Time	Rating	Where	Path (mi)	Width (yd)	Damage
April 16	2:53 PM CDT	F0	Christian, IL	0.1	30
April 16	3:05 PM CDT	F0	Christian, IL	0.1	30
April 16	3:07 PM CDT	F0	Christian, IL	0.1	30
April 16	4:57 PM CDT	F0	Ford, IL	0.5	40	$10,000
April 16	5:09 PM CDT	F2	Effingham, IL	4.0	200
April 16	5:15 PM CDT	F1	Coles, IL	5.0	150
April 16	5:18 PM CDT	F2	Jasper, IL	1.5	150
April 16	5:25 PM CDT	F0	Coles, IL	1.0	50
April 16	5:41 PM CDT	F0	Iroquois, IL	0.5	25
April 16	6:09 PM CDT	F0	Crawford, IL	0.1	30
April 16	6:20 PM CDT	F0	Iroquois, IL	0.5	25
April 16	6:56 PM CDT	F0	Iroquois, IL	0.5	25
April 16	7:06 PM CDT	F1	Crawford, IL	0.1	75

What this means

Ratings are the survey's, read off the damage rather than measured; the rating scale is above. Tornado counts rise through the record as reporting improved, so a year in the 1950s is not comparable with one today except for the strongest tornadoes, which were always noticed.

Sources

NOAA Storm Prediction Center tornado database, 1950-2025, the official record kept by NOAA's Storm Prediction Center.