Severe thunderstorms developed during the evening, producing large hail and wind damage.
Every event with a place to put it. Tap one for its entry below.
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.
The episode as NWS GRB wrote it up.
Severe thunderstorms developed during the evening, producing large hail and wind damage.
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 Jul 21, 12:45 PM CST, 5 hours 20 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREEN BAY WI 145 PM CDT MON JUL 21 2008 .SHORT TERM...PIECES OF ENERGY ROTATING THROUGH THE AREA AS THE UPPER TROF DEEPENS OVER THE GREAT LAKES REGION. FIRST S/W MOVING OVER THE SRN HALF OF THE WI EARLY THIS AFTERNOON WITH SCT SHRAS NOTED AND MOVING EASTWARD SOUTH OF THE TROF AXIS OVER NRN WI. A SECOND S/W TROF WAS DROPPING OVER MN AS PER WV LOOP...WITH EVEN ANOTHER NORTH OF LAKE SUPERIOR. WILL MONITOR THE CONVECTION WHICH DEVELOPS THIS AFTERNOON FOR EVENING DESCRIPTIONS. BUT DO ANTICIPATE RADARS INCREASING IN COVERAGE WITH CONVECTION AS TEMPS CLIMB INTO THE 70S. FOR TUESDAY...THE MODELS CONTINUE TO PROG ISOLD TO SCT AFTN INSTAB CONVECTION AS THE UPPER TROF AXIS LINGERS OVER THE SOUTHEAST HALF OF WI AND COOLER H5 DROPS OVER ERN WI. MODELS IN AGREEMENT WITH HANGING ONTO SURFACE DEWPOINTS IN THE 55 TO 60 RANGE FOR AT LEAST THE SRN HALF OF THE STATE INCLUDING CENTRAL AND EC WI SO WILL CONTINUE AFTN INSTAB CHC MENTION. NOTE SCT SHRA AND TSRA OVER THE ARROWHEAD OF MN THIS AFTERNOON NEAR THIS AXIS AND LEADING EDGE OF COOLER AIR ALOFT. .LONG TERM...TUESDAY NIGHT THROUGH MONDAY. QUITE WEATHER REGIME THROUGH WEDNESDAY NIGHT AS UPPER RIDGE AND SURFACE DOMINATE THE AREA. ONSET OF PRECIPITATION ON THE RETURN FLOW SIDE OF A SURFACE HIGH FOR THURSDAY IS THE MAIN CONCERN. ON THURSDAY...MDM RANGE MODELS SUGGEST THE RIDGE WILL BE HOLDING ON A BIT LONGER OVER THE AREA. THEREFORE WILL CONTINUE A DRY FORECAST INTO THURSDAY. WILL CONFINE PCPN FOR THURSDAY NIGHT AS THE COLD FRONT MAKE ITS WAY INTO THE AREA. THE FRONT MAY MOVE THROUGH FAST ON FRIDAY BUT WILL CONTINUE PCPN CHC THROUGH THE DAY. FRIDAY AFTERNOON TO MONDAY A RIDGE WILL BUILD OVER THE AREA FOR THE WEEKEND ALTHOUGH TEMPERATURES WILL REMAIN MILD DUE TO THE NW FLOW. ONLY MINOR ADJUSTMENTS...IF ANY...WERE MADE TO TEMPERATURES. && .AVIATION...SCT MVFR CIGS THIS AFTERNOON AND EVENING WITH SCT CONVECTION...THE AREAS OF MVFR CIGS SPREADING INTO NRN WI TONIGHT. && .GRB WATCHES/WARNINGS/ADVISORIES... NONE. && TDH/MARQUIS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREEN BAY WI 357 AM CDT MON JUL 21 2008 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-220900- VILAS-ONEIDA-FOREST-FLORENCE-NORTHERN MARINETTE-LINCOLN-LANGLADE- MENOMINEE-NORTHERN OCONTO-DOOR-MARATHON-SHAWANO-WOOD-PORTAGE- WAUPACA-OUTAGAMIE-BROWN-KEWAUNEE-WAUSHARA-WINNEBAGO-CALUMET- MANITOWOC-SOUTHERN MARINETTE-SOUTHERN OCONTO- 357 AM CDT MON JUL 21 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL AND NORTHEAST WISCONSIN. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND THIS EVENING OVER THE FORECAST AREA...THOUGH THEY ARE NOT EXPECTED TO BECOME SEVERE. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THUNDERSTORMS ARE POSSIBLE LATE IN THE WEEK...BUT IT IS TOO SOON TO DETERMINE THEIR SEVERE WEATHER POTENTIAL. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. LMZ521-522-541>543-220900- THE BAY OF GREEN BAY SOUTH OF A LINE FROM CEDAR RIVER MI TO ROCK ISLAND PASSAGE-LAKE MICHIGAN FROM WASHINGTON ISLAND TO SHEBOYGAN- 357 AM CDT MON JUL 21 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE MICHIGAN. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND THIS EVENING OVER THE FORECAST AREA...THOUGH THEY ARE NOT EXPECTED TO BECOME SEVERE. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THUNDERSTORMS ARE POSSIBLE LATE IN THE WEEK...BUT IT IS TOO SOON TO DETERMINE THEIR SEVERE WEATHER POTENTIAL.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
511 PM CDT MON JUL 21 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0509 PM HAIL CLINTONVILLE 44.61N 88.75W
07/21/2008 E0.25 INCH WAUPACA WI TRAINED SPOTTER
&&
JEFFLSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 514 PM CDT MON JUL 21 2008 WIZ030-035-036-212300- MARATHON-PORTAGE-WOOD- 514 PM CDT MON JUL 21 2008 ...THUNDERSTORMS DEVELOPING ACROSS CENTRAL WISCONSIN... AT 512 PM...DOPPLER RADAR INDICATED A LINE OF SCATTERED THUNDERSTORMS EXTENDING FROM NORTHEAST WOOD COUNTY TO WEST OF GREEN BAY. THE STORMS WERE MOVING SOUTHEAST AT 25 MPH. HAIL UP TO ONE HALF INCH IN DIAMETER...WIND GUSTS OVER 30 MPH...AND BRIEF HEAVY DOWNPOURS...ARE EXPECTED WITH THE STRONGER STORMS. SEEK SHELTER IN A STURDY STRUCTURE IF A STORM APPROACHES YOUR AREA. JKL
The Green Bay radar (KGRB), 48 km away, was scanning. The volume nearest the first event began at 00:04 UTC.
3 thunderstorm wind, 3 hail. Local standard time, as filed.
Thunderstorm winds snapped four tree limbs that were 8 to 12 inches in diameter. One of the tree limbs hit a house.
Thunderstorms winds downed trees in the Greenville area.
Hailstones, some as large as a nickel, covered the ground on the west side of Appleton.
Thunderstorms winds downed branches and produced half-inch hail at the intersection US Highway 441 and County Road P.
Torrential rainfall accompanied the hail.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2008Every state in 2008This day in weather historyWarnings in Wisconsin, July 2008
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: 129059, 129043, 129046, 129044, 129068, 129045.