Hail, Winnebago
- When
- August 21, 4:50 PM CST
- Where
- Winnebago County, 4 mi E of Pickett
- Measured
- 0.75 in hail
- Reported by
- TRAINED SPOTTER
- Coordinates
- 43.917, -88.650
Hail in Wisconsin, August 21, 2002
Thunderstorms developed an unstable airmass over east-central Wisconsin. Large hail was reported with one of these storms.
Where it happened
Every event with a place to put it. 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
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 1
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 GRB wrote it up.
Thunderstorms developed an unstable airmass over east-central Wisconsin. Large hail was reported with one of these storms.
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 Green Bay, WI wrote its last area forecast discussion before the first event at Aug 21, 2:40 PM CST, 2 hours 10 minutes earlier.
Area forecast discussion, Aug 21, 2:40 PM CST, 2 hours 10 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREEN BAY WI 340 PM CDT WED AUG 21 2002 FOR TONIGHT...REGIONAL RADARS CONTINUE TO SHOW SHOWERS AND THUNDERSTORMS OVER NORTHEAST WISCONSIN SOUTHWEST INTO SOUTHEAST MINNESOTA AND EASTERN IOWA. THINK SEVERE THREAT IS LIMITED TO OUR FAR SOUTHERN TIER OF COUNTIES AROUND OSHKOSH WHERE TEMPERATURES WARMED TO NEAR 80 THIS AFTERNOON. SPC DOES HAVE A SEVERE THUNDERSTORM WATCH OUT FOR SOUTHEAST WISCONSIN UNTIL 8 PM JUST SOUTH OF OUR CWA. FOR TOMORROW...MODEL RH FIELDS WOULD INDICATE A PARTIAL CLEARING TREND ACROSS THE CWA...ESPECIALLY DURING THE AFTERNOON HOURS. WILL BUMP UP WINDS UP TO 15 TO 25 MPH OVER THE EASTERN CWA FROM GREEN BAY AND THE FOX CITIES EAST TO THE LAKE BASED ON ETA SURFACE WIND FORECAST. CANADIAN HIGH WILL BUILD INTO THE REGION THURSDAY NIGHT AND FRIDAY...BRINGING FALLISH CONDITIONS. LOWS UP NORTH WILL DROP INTO THE MIDDLE TO UPPER 40S WHILE READINGS OVER THE SOUTH WILL BE FROM 50 TO 55. HIGHS WILL REACH THE 70S BOTH THURSDAY AND FRIDAY...BUT WILL UNDERCUT GUIDANCE VALUES...ESPECIALLY IN THE EAST DUE TO NORTHEAST FLOW OFF THE COOLER LAKE. A REINFORCING COLD FRONT WILL DROP SOUTHEAST INTO THE AREA ON SATURDAY. ETA WAS PROGGING DECENT LOW LEVEL MOISTURE AHEAD OF IT ALONG WITH 850/700MB LAPSE RATES AROUND 6C. A SLIGHTLY COOLER AIR MASS WILL FILTER INTO ON SUNDAY...THEREFORE WILL DROP HIGH TEMPERATURES BACK A FEW DEGREES FROM THE PREVIOUS FORECAST. REMAINDER OF THE FORECAST PERIOD REMAINS DRY...ASSUMING THAT THE MRF BLOCKING PATTERN DOES DEVELOP. .GRB...NONE. ECKBERG WWW.CRH.NOAA.GOV/GRB
Hazardous weather outlook, Aug 21, 11:00 AM CST, 5 hours 50 minutes before
WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-212030- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREEN BAY WI 1200 PM CDT WED AUG 21 2002 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF CENTRAL...NORTH CENTRAL AND NORTHEAST WISCONSIN. THERE IS A SLIGHT RISK OF SEVERE STORMS OVER PARTS OF CENTRAL AND EAST-CENTRAL WISCONSIN DURING THE AFTERNOON AND EVENING HOURS. THE SLIGHT RISK AREA IS SOUTH OF A LINE FROM MARSHFIELD...TO GREEN BAY...TO KEWAUNEE. THE PRIMARY THREAT WILL BE OF DAMAGING WINDS...AND OCCUR BETWEEN 2:00 PM AND 8:00 PM. IN ADDITION...HEAVY RAINFALL IS POSSIBLE ACROSS THE ENTIRE AREA THIS AFTERNOON AND THIS EVENING. A STRONG EAST-WEST FRONTAL BOUNDARY IS EXPECTED TO REMAIN NEARLY STATIONARY ACROSS CENTRAL AND EAST-CENTRAL WISCONSIN THIS AFTERNOON. PERIODS OF SHOWERS AND THUNDERSTORMS WILL CONTINUE NORTH OF THE FRONT. THE WIDESPREAD RAIN...EXTENSIVE CLOUD COVER...AND SOUTHEAST WINDS WILL KEEP TEMPERATURES NORTH OF THE FRONT RATHER COOL...AND SHOULD PREVENT ANY STORMS ACROSS NORTH-CENTRAL AND NORTHEAST WISCONSIN FROM BECOMING SEVERE. SUNSHINE ACROSS SOUTHERN WISCONSIN AND NORTHERN ILLINOIS WILL LEAD TO MUCH WARMER TEMPERATURES THERE. BRISK SOUTHERLY WINDS WILL BRING THE WARMER AIR NORTHWARD...AND COULD FUEL STRONG OR SEVERE STORMS IN THE VICINITY OF THE FRONT DURING THE AFTERNOON AND EARLY EVENING HOURS. SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON AND EVENING. SKOWRONSKI WWW.CRH.NOAA.GOV/GRB
In the hours before
Special weather statement, Aug 21, 11:00 AM CST, 5 hours 50 minutes before
WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-212030- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREEN BAY WI 1200 PM CDT WED AUG 21 2002 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF CENTRAL...NORTH CENTRAL AND NORTHEAST WISCONSIN. THERE IS A SLIGHT RISK OF SEVERE STORMS OVER PARTS OF CENTRAL AND EAST-CENTRAL WISCONSIN DURING THE AFTERNOON AND EVENING HOURS. THE SLIGHT RISK AREA IS SOUTH OF A LINE FROM MARSHFIELD...TO GREEN BAY...TO KEWAUNEE. THE PRIMARY THREAT WILL BE OF DAMAGING WINDS...AND OCCUR BETWEEN 2:00 PM AND 8:00 PM. IN ADDITION...HEAVY RAINFALL IS POSSIBLE ACROSS THE ENTIRE AREA THIS AFTERNOON AND THIS EVENING. A STRONG EAST-WEST FRONTAL BOUNDARY IS EXPECTED TO REMAIN NEARLY STATIONARY ACROSS CENTRAL AND EAST-CENTRAL WISCONSIN THIS AFTERNOON. PERIODS OF SHOWERS AND THUNDERSTORMS WILL CONTINUE NORTH OF THE FRONT. THE WIDESPREAD RAIN...EXTENSIVE CLOUD COVER...AND SOUTHEAST WINDS WILL KEEP TEMPERATURES NORTH OF THE FRONT RATHER COOL...AND SHOULD PREVENT ANY STORMS ACROSS NORTH-CENTRAL AND NORTHEAST WISCONSIN FROM BECOMING SEVERE. SUNSHINE ACROSS SOUTHERN WISCONSIN AND NORTHERN ILLINOIS WILL LEAD TO MUCH WARMER TEMPERATURES THERE. BRISK SOUTHERLY WINDS WILL BRING THE WARMER AIR NORTHWARD...AND COULD FUEL STRONG OR SEVERE STORMS IN THE VICINITY OF THE FRONT DURING THE AFTERNOON AND EARLY EVENING HOURS. SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON AND EVENING. SKOWRONSKI WWW.CRH.NOAA.GOV/GRB
The radar
The Green Bay radar (KGRB), 78 km away, was scanning. The volume nearest the first event began at 22:52 UTC.
Event by event
1 hail. Local standard time, as filed.
What these are
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Tornado and Flooding in Wisconsin, August 21 to 22, 2002
- Rip Current in Florida, August 21, 2002
- Lightning Strike in Florida, August 21, 2002
- Hail and Damaging Winds in Nebraska, August 21, 2002
- Flash Flooding in Wisconsin, August 21, 2002
- Flash Flood in South Dakota, August 21, 2002
- Lightning Strike in Arkansas, August 21, 2002
- Flash Flooding and Flooding in Texas, August 21, 2002
- Tornadoes and Damaging Winds in Iowa, August 21, 2002
- Marine Thunderstorm Winds in Lake Michigan, August 21, 2002
- Damaging Wind in Michigan, August 21, 2002
- Lightning Strike in Florida, August 21, 2002
More
Every storm in Wisconsin in 2002Every state in 2002This day in weather historyWarnings in Wisconsin, August 2002
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: 5313392.