Tornadoes · United States · Wisconsin · 2006

F0 tornado, Sherwood, Wisconsin, June 24, 2006

Name: F0 tornado, Sherwood, Wisconsin, June 24, 2006
Start: 2006-06-24T22:14:00.000Z
Location: Sherwood, Wisconsin

This F0 tornado ran 0.1 miles across Calumet County on June 24, 2006, touching down at 5:14 PM CDT and reaching 10 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 mphthis tornado
Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.
F173 to 112 mph
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: F0
Date: June 24, 2006
Touchdown: 5:14 PM CDT (22:14 UTC)
Path length: 0.1 miles (0.2 km)
Path width: 10 yards (9 m)
Deaths: 0
Injuries: 0
County: Calumet County
Touchdown point: 44.180, -88.350
Lift-off point: 44.180, -88.350
Record number: 696

What the Weather Service recorded

Thunderstorms became severe across central and east central Wisconsin from early afternoon to early in the evening ahead of a front that lifted north into the area. Penny to nickel size hail fell throughout Marathon county. In Wausau (Marathon co.), penny size hail covered the ground and heavy rain caused some street flooding. High winds downed trees 10 miles north of Stevens Point (Portage co.), a funnel cloud was spotted at Custer (Portage co.). A waterspout touched down, and remained nearly stationary, for about a minute in eastern Lake Winnebago (Calumet co.). A tree that was struck by lightning downed power lines in Scandinavia (Waupaca co.).

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

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 Green Bay, WI wrote its last area forecast discussion before the tornado touched down at Jun 24, 3:30 PM CDT, 1 hour 44 minutes earlier.

Area forecast discussion, Jun 24, 3:30 PM CDT, 1 hour 44 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREEN BAY WI
330 PM CDT SAT JUN 24 2006

.DISCUSSION...WIDESPREAD CONVECTION ACRS THE AREA...SOME OF THE STORMS
SVR. TSRA WL CONT INTO TNGT...BUT SHOULD DIMINISH. WENT WITH LIKELY POPS
OVER THE SE PART OF THE FCST AREA SUN AS SHOULD SEE PCPN IN NE QUAD OF
CLOSING UPR LOW. COMBO OF CLDS...PCPN...AND WINDS OFF THE LAKE WL KEEP
TEMPS DOWN.

&&

.GRB WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

SKOWRONSKI
WEATHER.GOV/GREENBAY

Hazardous weather outlook, Jun 24, 12:15 PM CDT, 4 hours 59 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREEN BAY WI
1215 PM CDT SAT JUN 24 2006

WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-251715-
VILAS-ONEIDA-FOREST-FLORENCE-NORTHERN MARINETTE-SOUTHERN MARINETTE-
LINCOLN-LANGLADE-MENOMINEE-NORTHERN OCONTO-SOUTHERN OCONTO-DOOR-
MARATHON-SHAWANO-WOOD-PORTAGE-WAUPACA-OUTAGAMIE-BROWN-KEWAUNEE-WAUSHARA-
WINNEBAGO-CALUMET-MANITOWOC-
1215 PM CDT SAT JUN 24 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL AND NORTHEAST
WISCONSIN.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS ARE LIKELY THROUGH THIS EVENING. WIDESPREAD SEVERE WEATHER
IS NOT EXPECTED...BUT ISOLATED STORMS WITH HAIL UP TO ONE INCH AND WIND
GUSTS TO 60 MPH ARE POSSIBLE OVER CENTRAL WISCONSIN.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH NEXT FRIDAY

THERE IS A CHANCE OF THUNDERSTORMS SUNDAY AND AGAIN TUESDAY
INTO WEDNESDAY. SEVERE WEATHER IS NOT EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON OR TONIGHT.

LMZ521-522-541>543-564-251715-
THE BAY OF GREEN BAY SOUTH OF A LINE FROM CEDAR RIVER MI TO ROCK ISLAND
PASSAGE-LAKE MICHIGAN FROM WASHINGTON ISLAND TO SHEBOYGAN-THE ADJOINING
WISCONSIN WATERS OF LAKE MICHIGAN OUT TO MID-LAKE-
1215 PM CDT SAT JUN 24 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WATERS OF CENTRAL AND
SOUTHERN GREEN BAY...AND LAKE MICHIGAN FROM ROCK ISLAND PASSAGE
TO SHEBOYGAN.

.DAY ONE...TODAY AND TONIGHT

THERE IS A CHANCE OF THUNDERSTORMS THROUGH THIS EVENING. SOME OF THE
STRONGER THUNDERSTORMS MAY PRODUCE SMALL HAIL AND GUSTY WINDS...BUT
SEVERE WEATHER IS NOT EXPECTED.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH NEXT FRIDAY

THERE IS A CHANCE OF THUNDERSTORMS SUNDAY AND AGAIN TUESDAY
INTO WEDNESDAY. SEVERE WEATHER IS NOT EXPECTED AT THIS TIME.

AUSTIN
WEATHER.GOV/GREENBAY

In the hours before

Local storm report, Jun 24, 3:06 PM CDT, 2 hours 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
306 PM CDT SAT JUN 24 2006

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

0255 PM     HAIL             8 NNE LAC DU FLAMBEAU   46.07N 89.82W
06/24/2006  E0.50 INCH       VILAS              WI   EMERGENCY MNGR

&&

JKL

Local storm report, Jun 24, 3:39 PM CDT, 1 hour 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
339 PM CDT SAT JUN 24 2006

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

0330 PM     FUNNEL CLOUD     CUSTER                  44.50N 89.41W
06/24/2006                   PORTAGE            WI   AMATEUR RADIO

            BRIEF FUNNEL FORMED UNDER ROTATING WALL CLOUD.

&&

JKL

Local storm report, Jun 24, 3:50 PM CDT, 1 hour 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
350 PM CDT SAT JUN 24 2006

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

0310 PM     TSTM WND DMG     10 N STEVENS POINT      44.65N 89.56W
06/24/2006                   PORTAGE            WI   BROADCAST MEDIA

            TREES DOWN ACROSS ROAD.

&&

JKL

Local storm report, Jun 24, 4:09 PM CDT, 1 hour 5 minutes before

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Special weather statement, Jun 24, 4:35 PM CDT, 39 minutes before

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Local storm report, Jun 24, 4:44 PM CDT, 30 minutes before

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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.

Green Bay/Straub, WI (KGRB), 12:00Z

10.2 hours before the tornado, 39 km from the path. June 24, 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: 0 J/kg
Mixed-layer CIN: -78458 J/kg
Surface CAPE: 0 J/kg
Mixed-layer LCL: 1833 m above ground
0-6 km bulk shear: 36 kt
0-1 km bulk shear: 7 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 41 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0
0-3 km lapse rate: 4.0 K/km

Open this sounding in Storm Lab

Green Bay/Straub, WI (KGRB), 00:00Z

1.8 hours after it, 39 km from the path. June 25, 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: 0 J/kg
Mixed-layer CIN: -76555 J/kg
Surface CAPE: 11 J/kg
Mixed-layer LCL: 1087 m above ground
0-6 km bulk shear: 26 kt
0-1 km bulk shear: 22 kt
0-1 km storm-relative helicity: -88 m²/s²
0-3 km storm-relative helicity: 42 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0
0-3 km lapse rate: 5.6 K/km

Open this sounding in Storm Lab

The surface observations

Appleton/Outagam (ATW), 16 km from the path, in the two hours either side.

Time (UTC)	Temp (°F)	Dew point (°F)	Wind	Gust (kt)	Pressure (mb)	Weather
00:00 UTC

From the Iowa Environmental Mesonet's archive of airport observations.

The radar

The Green Bay radar (KGRB), 40 km away, was scanning. The volume nearest the touchdown began at 22:15 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.

This ground now

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

The other tornadoes of June 24, 2006

6 more were confirmed in the United States that day.

Date	Time	Rating	Where	Path (mi)	Width (yd)
June 24	3:13 PM EDT	F0	Polk, FL	0.3	40
June 24	5:27 PM CDT	F0	Norman, MN	0.1	25
June 24	4:47 PM MDT	F0	Dewey, SD	0.5	10
June 24	6:10 PM CDT	F0	Potter, SD	1.0	10
June 24	6:35 PM CDT	F0	Sully, SD	0.5	10
June 24	7:35 PM CDT	F0	Hand, SD	0.5	10

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.