An upper trough initiated convection in northeast Wisconsin. Outflow from these storms initiated additional severe thunderstorms.
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.
An upper trough initiated convection in northeast Wisconsin. Outflow from these storms initiated additional severe thunderstorms.
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 5, 2:38 AM CST, 9 hours 27 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREEN BAY WI 338 AM CDT THU JUL 5 2007 .SHORT TERM...TODAY THROUGH FRIDAY. JET STREAKS MOVING THROUGH NORTHWEST UPPER FLOW SHOULD CONTINUE TO HELP SUPPORT SCATTERED THUNDERSTORMS THROUGH THIS EVENING. SCATTERED ELEVATED SHOWERS AND THUNDERSTORMS HAVE BEEN OCCURING OVERNIGHT AND WILL CONTINUE THROUGH ABOUT 15Z. THEN EXPECT SURFACE BASED CONVECTION TO BEGIN AROUND 18Z. MID LEVELS ARE QUITE COLD WITH WET BULB ZERO HEIGHTS AROUND 8K FEET. HAIL CERTAINLY POSSIBLE WITH THE STRONGER STORMS THIS AFTERNOON. WIND FIELD ISNT THAT STRONG...BUT WITH INVERTED V TYPE FORECAST SOUNDINGS WOULD NOT BE SURPRISED TO SEE SOME NEAR SEVERE KNOT WIND GUSTS WITH THE SCATTERED STORMS LATER TODAY. SKIES SHOULD CLEAR OVERNIGHT AND BE PARTLY SUNNY FRIDAY AS MID LEVELS WARM AND AIR STABILIZES. .LONG TERM...FRIDAY NIGHT THROUGH NEXT WEDNESDAY MAIN CONCERN FOR THE WEEKEND WILL BE THE HEAT AND APPROACHING COLD FRONT LATE ON THE DAY SUNDAY. MODELS CONTINUE TO SHOW A DOME OF WARM AIR AT 925/850MB LEVEL THAT PUSHES INTO WISCONSIN SATURDAY AND SATURDAY NIGHT. DID RAISE MAXIMUM TEMPERATURES A FEW DEGREES ON SATURDAY. NEW 00Z GFS MODEL SLOWER WITH FRONTAL SYSTEM ON SUNDAY COMPARED TO THE 00Z WRF MODEL. THE GFS SOLUTION MATCHES UP WELL WITH THE 12Z AND 00Z ECMWF. WITH SLOWER FRONTAL PASSAGE...SUNDAY WILL BE DOWN RIGHT HOT ACROSS THE AREA. USING AN 850MB TEMPERATURE AROUND 18C OVER THE NORTH AND 22C OVER THE SOUTH...THIS WOULD GIVE US HIGHS IN THE UPPER 80S OVER THE FAR NORTH AND THE MIDDLE 90S OVER THE SOUTH. THIS FORECAST IS FAIRLY CONSERVATIVE BASED ON 850MB TEMPERATURES. WRF MODEL EVEN MORE BULLISH WITH 850MB TEMPERATURES AROUND +25C ON SUNDAY MORNING...THEREFORE THERE IS SOME POTENTIAL TEMPERATURES COULD BE EVEN WARMER THAN WHAT IS CURRENTLY ADVERTISED. MODELS TEND TO HAVE A DIFFICULT TIME WITH WARM POCKET MAKING IT THIS FAR EAST FROM THE PLAINS. LATER SHIFTS CAN ADJUST AS NEEDED...BUT CONFIDENCE IS HIGH TEMPERATURES WILL MAKE INTO THE MIDDLE 90S ACROSS THE SOUTHEAST PORTION OF THE FORECAST AREA. LITTLE RELIEF EXPECTED ALONG THE LAKESHORE AS WELL AS SOUTHWEST WINDS WILL PUSH THE HOT AIR RIGHT UP TO THE LAKE. MODELS SUGGEST THAT 925MB WINDS WILL BE STRONG ENOUGH TO KEEP LAKE BREEZE OFFSHORE. COLD FRONT PUSHES SLOWLY ACROSS THE AREA SUNDAY NIGHT INTO MONDAY. GFS SHOWING MCS MOVING ACROSS THE AREA LATER SUNDAY NIGHT...SO CONTINUED CHANCE POPS FOR NOW. FRONT SLOWLY PUSHES SOUTH OF THE FORECAST AREA AT THE END OF THE PERIOD. LITTLE CHANGES MADE BEYOND MONDAY WITH TIMING OF FRONTAL POSITION SLOWER THAN PREVIOUS FORECAST. && .AVIATION...VFR CONDITIONS EXPECTED THROUGH TONIGHT EXCEPT NEAR THE SCATTERED THUNDERSTORMS. DUE TO THE SCATTERED NATURE OF THE THUNDERSTORMS EXPECTED TODAY...THUNDERSTORMS WILL LIKELY NOT BE MENTION IN TAFS EXCEPT WHEN THEY ARE APPROACHING AN AIRPORT. OWNERS OF LIGHT AIRCRAFT SHOULD AVOID THE AREAS BELOW EVEN LIGHT RAIN SHOWERS AS GUSTY WINDS ARE POSSIBLE AS RAIN EVAPORATES INTO DRY AIR BELOW. && .GRB WATCHES/WARNINGS/ADVISORIES... NONE. && RDM/ECKBERG
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREEN BAY WI 1245 PM CDT THU JUL 5 2007 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-061745- 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- 1245 PM CDT THU JUL 5 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH-CENTRAL AND NORTHEAST WISCONSIN. .DAY ONE...THIS AFTERNOON AND TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EARLY EVENING NORTH AND EAST OF A LINE FROM RHINELANDER TO OSHKOSH. SCATTERED THUNDERSTORMS ARE EXPECTED WITH SOME OF THE STORMS POSSIBLY PRODUCING HAIL AROUND ONE INCH AND GUSTY WINDS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY ADDITIONAL THUNDERSTORMS ARE POSSIBLE SUNDAY AND MONDAY. THERE IS SOME POSSIBILITY OF SEVERE THUNDERSTORMS SUNDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON OR EVENING. LMZ521-522-541>543-564-061745- 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- 1245 PM CDT THU JUL 5 2007 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 SCATTERED THUNDERSTORMS MAY PRODUCE GUSTY WINDS AND LIGHTNING THAT WOULD BE A HAZARD TO MARINERS THIS AFTERNOON AND THIS EVENING. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY ADDITIONAL THUNDERSTORMS ARE POSSIBLE SUNDAY AND MONDAY. THERE IS A CHANCE OF SEVERE THUNDERSTORMS SUNDAY NIGHT. IN ADDITION TO THE POSSIBILITY OF THUNDERSTORMS...SOUTH WINDS WILL INCREASE SATURDAY NIGHT AND SUNDAY AND COULD BE A HAZARD TO SMALL CRAFT. TE WEATHER.GOV/GREENBAY
The Green Bay radar (KGRB), 139 km away, was scanning. The volume nearest the first event began at 18:05 UTC.
10 hail, 2 thunderstorm wind. Local standard time, as filed.
Hail was discovered on the ground by a spotter who was traveling through the area. Time of event is approximate.
A thunderstorm that dropped nickel size hail also produced strong straight-line winds and knocked out power to a campground near Brussels.
Penny size hail was reported at the airport.
Trees were blown down by straight-line thunderstorm winds in the southern part of the county.
Nickel size hail fell as a severe storm passed through Suamico. A storm that moved through 15 minutes earlier dropped smaller hail.
Penny size hail was reported by a local TV meteorologist.
Estimated 50 to 60 mph straight-line thunderstorm winds downed tree limbs and branches across Ashwaubenon. Very heavy rain was also reported with the storm.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2007Every state in 2007This day in weather historyWarnings in Wisconsin, July 2007
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: 48056, 48057, 48058, 48059, 48060, 48061, 48062, 48063, 48064, 48066, 48067, 48065.