Hail and Damaging Winds in Wisconsin, June 30, 2001

Name: Hail and Damaging Winds in Wisconsin, June 30, 2001
Start: 2001-06-30T16:00
End: 2001-06-30T19:25
Location: Wisconsin

June 30, 2001 · NWS MKX · 4 events in 3 counties and zones

Severe thunderstorms affected parts of southeast Wisconsin with large hail and damaging, straight-line, down-burst winds. ).

Where it happened

Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 4

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS MKX wrote it up.

Severe thunderstorms affected parts of southeast Wisconsin with large hail and damaging, straight-line, down-burst winds. In addition, a brief waterspout was noted near Wind Point (Racine Co.). Large trees were toppled by powerful thunderstorm winds in Cedar Grove (Sheboygan Co.), and near Johnson Creek in Jefferson County. Synoptically, thunderstorms fired up along a cold front and pre-frontal trough punching southeast through Wisconsin. Surface dewpoints ahead of the front were in the lower 70s. Maximum daytime temperatures were in the mid to upper 80s. Cell movement was to the east/southeast.

What forecasters said that day

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

NWS Milwaukee, WI wrote its last area forecast discussion before the first event at Jun 30, 1:00 PM CST, 3 hours earlier.

Area forecast discussion, Jun 30, 1:00 PM CST, 3 hours before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
200 PM CDT SAT JUN 30 2001

FCST FOCUS IS ON TSTM CHCS AND SUBSEQUENT SWITCH TO COOLER WX REGIME.

UPCOMING WX CHANGE STILL EXPCD TO COME IN TWO PHASES. FIRST FNT
NOW OVR SRN WI CONTS SAGGING SWD...FLWD BY A WSHFT BUT NOT MUCH TMP
DFRNC. CNVTN NOT THAT WDSPRD AS YET...BUT POTENTIAL STILL EXISTS
FOR A LN OF STORMS TO FLARE UP NR THE FNT.

SECOND PHASE OF TRANSITION IS THE STGR CDFNT NOW APCHG NRN WI.
MODELS SEEM TO FAVOR THIS BNDRY FOR DVLPT OF MORE ORGANIZED RN BAND
LATER TNGT AS IT INVADES CWA. MAY LET GNRL RN CHC MENTIONED FOR
FIRST BDRY COVER THAT PSBLTY TOO. BUT MAIN MESSAGE WITH THIS FNT IS
FOLLOWING INFLUX OF COOLER AND DRIER WX ON BRISK NLY WNDS. CHG TO BE
MOST NOTICEABLE NR LK MI...WHERE WNDS BHND THIS "PNEUMONIA" FNT TURN
TO THE NE AND BLOW IN OFF THE CHILLY WATERS. IF THIS FNT WAS COMING
THRU DURG THE DAY THE EFFECT WUD BE MUCH MORE DRAMATIC.

ETA IS STILL GENERATING A BAND OF HIER RH AND QPF IN RETURN FLOW ON
MONDAY. AVN NOT AS AGRV...WL PRBLY GO WITH INCRG CLDS BUT NOT
MENTION RN AS YET.

TMP GUID LOOKS RSNBL AND REFLECTS UPCOMING CHG WELL...WON'T STRAY TOO
FAR FM IT AT THIS POINT.

.MKX...NONE.

NJ

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

2 thunderstorm wind, 1 hail, 1 waterspout. Local standard time, as filed.

Thunderstorm Wind, Sheboygan

When: June 30, 4:00 PM CST
Where: Sheboygan County, Cedar Grove
Measured: 52 kt (60 mph)
Reported by: LAW ENFORCEMENT
Coordinates: 43.567, -87.833

Hail, Jefferson

When: June 30, 6:13 PM CST
Where: Jefferson County, Waterloo
Measured: 0.75 in hail
Reported by: LAW ENFORCEMENT
Coordinates: 43.183, -88.983

Thunderstorm Wind, Jefferson

When: June 30, 6:45 PM CST
Where: Jefferson County, Johnson Creek
Measured: 52 kt (60 mph)
Reported by: LAW ENFORCEMENT
Coordinates: 43.083, -88.767

Waterspout, Racine

When: June 30, 7:25 PM CST
Where: Racine County, 2 mi E of Wind Pt
Reported by: OTHER FEDERAL AGENCY
Coordinates: 42.730, -87.812 (the zone’s center; the record gives no point)

What these are

Thunderstorm Wind: Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
Hail: Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
Waterspout: A tornado over water. One that moves ashore is filed as a tornado from the coastline on.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in Wisconsin in 2001 Every state in 2001 This day in weather history Warnings in Wisconsin, June 2001

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5256575, 5256572, 5256573, 5256574.