A persistent weather pattern with weak northwest flow over Wisconsin, and cold air aloft, produced slow-moving thunderstorms. Some storms produced large hail and wind gusts to around 50 mph.
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.
A persistent weather pattern with weak northwest flow over Wisconsin, and cold air aloft, produced slow-moving thunderstorms. Some storms produced large hail and wind gusts to around 50 mph. Lightning from one of the storms killed two men working on a tree house in southern Oconto County.
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 3, 1:36 PM CST, 1 hour 18 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREEN BAY WI 236 PM CDT SUN AUG 3 2014 FORECAST DISCUSSION FOR ROUTINE AFTERNOON FORECAST ISSUANCE .SHORT TERM...TONIGHT AND MONDAY ISSUED AT 235 PM CDT SUN AUG 3 2014 CURRENT TSTM ACTIVITY...FOG POTENTIAL FOR LATER TNGT AND THE POTENTIAL FOR STORMS TO RE-FIRE ON MON REMAIN THE MAIN FCST ISSUES OVER THE NEXT 24 HOURS. THE 19Z MSAS SFC ANALYSIS INDICATED A WEAK CDFNT EXTENDED FROM ERN SECTIONS OF UPR MI W-SW THRU NRN WI TO CNTRL SECTIONS OF MN. THIS FRONTAL BOUNDARY...ACCOMPANIED BY DAYTIME HEATING/INSTABILITY AND A SHEARED SHORTWAVE OVER CNTRL/SRN WI...ARE RESPONSIBLE FOR THE LATEST CLUSTERS OF SHWRS AND TSTMS OVER NE WI. SOME OF THESE STORMS HAVE BEEN STRONG (NOT SEVERE) WITH SMALL HAIL...WIND GUSTS TO 40 MPH AND BRIEF HEAVY DOWNPOURS. CURRENT SHWR/TSTM ACTIVITY ACROSS THE REGION WL CONT THRU ROUGHLY MID-EVENING BEFORE THE LOSS OF DAYTIME HEATING SAPS MUCH OF THE STRENGTH AWAY. THE PCPN THREAT WL NOT COMPLETELY DIMINISH TNGT AS THE SLOW-MOVING CDFNT TO STILL BE IN THE PROCESS OF DROPPING SWD THRU THE FCST AREA. THUS...CHC POPS WL BE KEPT IN THE FCST DURING THE OVRNGT HOURS. IN ADDITION TO THE POPS...EXPECT TO SEE PATCHY FOG DEVELOP ONCE AGAIN LATER TNGT WITH LIGHT WINDS AND DEW POINTS STILL IN THE MID TO UPR 50S. THE MOST SUSCEPTIBLE AREA FOR THICKER FOG WOULD BE OVER NRN WI WHERE A LOWER POP/POTENTIAL BREAKS IN THE CLOUDS TO OCCUR. MIN TEMPS TO RANGE FROM THE LWR TO MID 50S NORTH... TO THE UPR 50S/LWR 60S CNTRL/E-CNTRL WI. MAIN FCST FOCUS FOR MON TO BE OVER THE SRN HALF OF THE STATE AS THE CDFNT CONTS TO PUSH SOUTH. EXPECT SHWR/TSTM ACTIVITY TO INCREASE TOWARD MIDDAY OVER SRN SECTIONS OF THE FCST AREA WITH A POTENTIAL OF STRONGER STORMS PRODUCING SMALL HAIL...BRIEF GUSTY WINDS AND HEAVY RAINFALL (LIKE TODAY). NRN WI MAY SEE SOME LINGERING SHOWERS DURING THE MORNING...BUT ANTICIPATE A DRYING TREND DURING THE AFTERNOON WITH EVEN SOME SUNSHINE LATER IN THE DAY. TEMPS BEHIND THE CDFNT WL BE NOTICEABLY COOLER WITH READINGS RANGING FROM THE LWR 70S NORTH TO AROUND 80S DEGS OVER CNTRL WI. .LONG TERM...MONDAY NIGHT THROUGH SUNDAY ISSUED AT 235 PM CDT SUN AUG 3 2014 WAS THINKING A QUIET PATTERN WILL BE SHAPING UP FOR THIS PORTION OF THE FORECAST...BUT THE 12Z MODELS THREW IN A NEW WRINKLE DURING THE MID-WEEK PERIOD. BOTH THE GFS AND GEM TAKE A SHEARED SHORTWAVE AND SURFACE LOW ACROSS THE NORTHERN MISSISSIPPI VALLEY LATE TUESDAY NIGHT THROUGH WEDNESDAY NIGHT...BRINGING CENTRAL AND SOUTHERN WISCONSIN A CHANCE OF SIGNIFICANT RAINFALL. THE NAM AND THE ECMWF KEEP A DRY LOOK...SO THIS INCREASES THE UNCERTAINTY IN THE FORECAST CONSIDERABLY. WILL STICK WITH CONTINUITY SINCE THE REGION IS IN CLOSE PROXIMITY TO A STABLE/DRY HIGH PRESSURE SYSTEM. MONDAY NIGHT AND TUESDAY...A WEAK COLD FRONT WILL CONTINUE TO SLOWLY DROP SOUTHWARD OVER CENTRAL WISCONSIN ON MONDAY NIGHT AND SOUTHERN WISCONSIN ON TUESDAY. ALONG THE BOUNDARY...WEAK CONVERGENCE IN THE LOW LEVELS AND TROUGHING ALOFT WILL SPELL SCATTERED SHOWERS AND THUNDERSTORMS CONTINUING INTO THE EVENING OVER CENTRAL AND EAST-CENTRAL WISCONSIN. BECAUSE FORCING IS WEAK...BELIEVE THERE WILL BE A STRONG DIURNAL COMPONENT TO ANY CONVECTION...AND SHOWERS AND STORMS WILL BE WEAKENING FAIRLY RAPIDLY THROUGH THE EVENING. BUT WILL LEAVE AN ISOLATED MENTION OVERNIGHT. THE FRONT WILL DROP INTO SOUTHERN WISCONSIN ON TUESDAY BUT A FEW MODELS CONTINUE TO SPIT OUT LIGHT PRECIP OVER CENTRAL WISCONSIN. TOUGH TO FIND A GOOD REASON FOR THIS LIGHT PRECIP...AS PROGGED SOUNDINGS SHOW STRONG CAPPING AT 700MB. WILL LEAVE THE FORECAST DRY. HIGHS MAINLY IN THE MIDDLE 70S. TUESDAY NIGHT THROUGH WEDNESDAY NIGHT...BOTH THE GFS AND GEM BRING A SHEARED SHORTWAVE SLOWLY ACROSS THE NORTHERN PLAINS AND NORTHERN MISSISSIPPI VALLEY OVER THE PERIOD. AHEAD OF THIS WAVE AND SURFACE LOW...THEY DEPICT THE POSSIBILITY OF A MCS TRACKING ACROSS CENTRAL AND SOUTHERN WISCONSIN MAINLY WEDNESDAY INTO WEDNESDAY NIGHT. ALTHOUGH THIS IS A SUBSTANTIAL CHANGE FROM CONTINUITY...THE ECMWF MAINTAINS THE CURRENT DRY FORECAST BY KEEPING PRECIPITATION WELL SOUTHWEST OF THE AREA. WITH COORDINATION FROM SURROUNDING OFFICES...WILL SIDE IN FAVOR OF THE ECMWF WHICH SHOWS HIGH PRESSURE DOMINATING OUR REGION THEREBY KEEPING THE AREA DRY. REST OF THE FORECAST...THE SHORTWAVE AND LOW PRESSURE CONTINUE TO DROP SOUTHEAST INTO THE MID-MISSISSIPPI AND OHIO VALLEY THURSDAY AND FRIDAY. IN ITS PLACE...HIGH PRESSURE WILL BUILD INTO THE REGION FOR THE LATTER HALF OF THE WEEK. TEMPERATURES WILL GRADUALLY WARM A DEGREE OR TWO EACH DAY FROM WEDNESDAY THROUGH SATURDAY. THE NEXT CHANCE OF PRECIP WILL NOT OCCUR UNTIL POSSIBLY NEXT SUNDAY. && .AVIATION...FOR 18Z TAF ISSUANCE ISSUED AT 1229 PM CDT SUN AUG 3 2014 COMBINATION OF A SHEARED SHORTWAVE MOVING THRU THE SRN HALF OF WI... A SLOW MOVING CDFNT ACROSS NRN WI AND DAYTIME HEATING HAVE ALLOWED FOR SHWRS/TSTMS TO POP UP ACROSS MOST OF NE WI THIS AFTERNOON. WHILE VFR CONDITIONS ARE EXPECTED FOR THE MOST PART...ANY TSTM WL HAVE THE CAPABILITY OF PRODUCING SMALL HAIL...BRIEF GUSTY WINDS AND HEAVY RAINFALL WITH MVFR VSBYS. THE PCPN IS EXPECTED TO CONT THRU MOST OF THE EVENING HOURS AND THEN BECOME MORE ISOLATED IN NATURE DUE TO THE LOSS OF DAYTIME HEATING. EXPECT TO SEE PATCHY FOG DEVELOP ONCE AGAIN LATER TNGT WHICH COULD LEAD TO IFR/MVFR VSBYS/CIGS ESPECIALLY ACROSS N-CNTRL WI. WE COULD SEE ANOTHER ROUND OF SHWRS AND TSTMS ON MON AS THE SLOW-MOVING CDFNT EDGES FARTHER SOUTH FROM CNTRL TO SRN WI. && .GRB WATCHES/WARNINGS/ADVISORIES... NONE. && SHORT TERM.....AK LONG TERM......MPC AVIATION.......AK
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREEN BAY WI 243 PM CDT SUN AUG 3 2014 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-041945- 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- 243 PM CDT SUN AUG 3 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL AND NORTHEAST WISCONSIN. .DAY ONE...TONIGHT SCATTERED THUNDERSTORMS WILL CONTINUE INTO THE EVENING HOURS. THE STRONGER STORMS WILL BE CAPABLE OF PRODUCING BRIEF GUSTY WINDS TO 45 MPH...SMALL HAIL AND HEAVY RAINFALL. THE CHANCE FOR ADDITIONAL THUNDERSTORMS ARE EXPECTED TO CONTINUE OVERNIGHT...BUT THESE STORMS WILL BE WEAKER AND NOT POSE A SEVERE RISK. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SUNDAY THERE IS A CHANCE OF THUNDERSTORMS ACROSS THE REGION ON MONDAY... AND OVER CENTRAL AND EAST-CENTRAL WISCONSIN MONDAY NIGHT. A FEW STRONG THUNDERSTORMS WITH SMALL HAIL...GUSTY WINDS AND HEAVY RAIN ARE POSSIBLE OVER CENTRAL AND EAST CENTRAL WISCONSIN MONDAY AFTERNOON AND EARLY EVENING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TONIGHT. HOWEVER...ANY HAIL OR WIND GUST REPORTS WOULD BE APPRECIATED. LMZ521-522-541>543-041945- THE BAY OF GREEN BAY SOUTH OF A LINE FROM CEDAR RIVER MI TO ROCK ISLAND PASSAGE-LAKE MICHIGAN FROM WASHINGTON ISLAND TO SHEBOYGAN- 243 PM CDT SUN AUG 3 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST LAKE MICHIGAN AND THE WATERS OF GREEN BAY. .DAY ONE...TONIGHT SCATTERED THUNDERSTORMS WILL CONTINUE INTO THE EVENING HOURS. THE STRONGER STORMS WILL BE CAPABLE OF PRODUCING BRIEF GUSTY WINDS TO 40 KNOTS...SMALL HAIL AND HEAVY RAINFALL. THE CHANCE FOR ADDITIONAL THUNDERSTORMS ARE EXPECTED TO CONTINUE OVERNIGHT...BUT THESE STORMS WILL BE WEAKER AND NOT POSE A SEVERE RISK. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SUNDAY THERE IS A CHANCE OF THUNDERSTORMS MONDAY AND MONDAY EVENING... BUT WIDESPREAD SEVERE WEATHER IS NOT ANTICIPATED AT THIS TIME. PATCHY FOG OR HAZE CAN BE EXPECTED AT TIMES ON LAKE MICHIGAN. AK/MPC
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 100 PM CDT SUN AUG 3 2014 WIZ048-049-031900- CALUMET-WINNEBAGO- 100 PM CDT SUN AUG 3 2014 ...SPECIAL WEATHER STATEMENT... AT 1256 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS NEAR OSHKOSH...MOVING EAST AT 20 MPH. ONE HALF INCH DIAMETER HAIL...WINDS 30 TO 40 MPH...OCCASIONAL CLOUD TO GROUND LIGHTNING...BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... WINNEBAGO... BLACK WOLF POINT... CENTRAL LAKE WINNEBAGO... STOCKBRIDGE... QUINNEY... BROTHERTOWN... KLOTEN... JERICHO... BRANT... CHILTON... CHARLESBURG... THESE STORMS MAY EFFECT EAA GROUNDS. IF YOU ARE OUTDOORS...SEEK SHELTER INDOORS UNTIL THE STORMS PASS. GUSTY WINDS MAY CAUSE LIGHT WEIGHT OBJECTS TO BE BLOWN OVER. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED. ALLEN
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
102 PM CDT SUN AUG 03 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0101 PM HAIL OSHKOSH 44.01N 88.55W
08/03/2014 M0.25 INCH WINNEBAGO WI LAW ENFORCEMENT
&&
AALLENSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 309 PM CDT SUN AUG 3 2014 WIZ022-039-040-032115- BROWN-DOOR-KEWAUNEE- 309 PM CDT SUN AUG 3 2014 ...STRONG THUNDERSTORMS MOVING INTO SOUTHERN DOOR COUNTY... AT 303 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 8 MILES WEST OF STURGEON BAY TO 15 MILES SOUTHWEST OF STURGEON BAY TO 26 MILES SOUTHWEST OF STURGEON BAY...MOVING SOUTHEAST AT 20 MPH. PEA SIZE HAIL...WINDS 30 TO 40 MPH...BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THESE STORMS. LOCATIONS IMPACTED INCLUDE... POTAWATOMI STATE PARK... KOLBERG... ROSIERE... MAPLEWOOD... DYCKESVILLE... DUVALL... STURGEON BAY... FORESTVILLE... THIRY DAEMS... VIGNES... CARNOT... KODAN... LINCOLN... CLAY BANKS... GUSTY WINDS MAY CAUSE LIGHT WEIGHT OBJECTS TO BE BLOWN OVER. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THESE STORMS HAVE PASSED. AK
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 339 PM CDT SUN AUG 3 2014 WIZ039-040-032130- BROWN-KEWAUNEE- 339 PM CDT SUN AUG 3 2014 ...STRONG STORM MOVING OVER NORTHEAST BROWN COUNTY... AT 334 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER NORTHEASTERN BROWN COUNTY...MOVING SOUTHEAST AT 15 MPH. NICKEL SIZE HAIL...WINDS UP TO 50 MPH...ARE POSSIBLE WITH THIS STORM. * THE THUNDERSTORM WILL BE NEAR... LUXEMBURG BY 405 PM CDT... GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE OBJECTS TO BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED. MPC
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
342 PM CDT SUN AUG 03 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0341 PM HAIL 1 NE APPLETON 44.27N 88.39W
08/03/2014 M0.25 INCH OUTAGAMIE WI TRAINED SPOTTER
PEA SIZE HAIL AND GUSTY WINDS THAT BLEW AROUND SMALL
DEBRIS.
&&
AALLENSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 352 PM CDT SUN AUG 3 2014 WIZ037>039-048-049-032145- BROWN-CALUMET-OUTAGAMIE-WAUPACA-WINNEBAGO- 352 PM CDT SUN AUG 3 2014 ...STRONG THUNDERSTORMS OVER EAST-CENTRAL WISCONSIN... AT 349 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A CLUSTER OF THUNDERSTORMS FROM NEAR APPLETON TO SCANDINAVIA. THE STRONGEST THUNDERSTORM WAS LOCATED 10 MILES WEST OF APPLETON...MOVING SOUTHEAST AT 20 MPH. ONE HALF INCH DIAMETER HAIL...WINDS 30 TO 40 MPH...BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... GREENVILLE... LARSEN... UW FOX VALLEY... MENASHA... APPLETON... NEENAH... KIMBERLY... NORTHERN LAKE WINNEBAGO... LITTLE CHUTE... DARBOY... COMBINED LOCKS... KAUKAUNA... GUSTY WINDS MAY CAUSE LIGHT WEIGHT OBJECTS TO BE BLOWN OVER. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED. AK
The Green Bay radar (KGRB), 44 km away, was scanning. The volume nearest the first event began at 20:53 UTC.
4 hail, 1 lightning. Local standard time, as filed.
A thunderstorm produced nickel size hail, along with wind gusts estimated at 50 mph, southeast of Hortonville.
Nickel size hail fell at the intersection of State Highways 76 and 96, near Appleton.
Nickel size hail fell at Willow Reservoir.
Lightning from a thunderstorm that quickly developed west of Abrams killed two men working on a tree house at a home on County Road E in the Town of Morgan. The men were struck by lightning from the storm as it passed about two miles to their south. One of the men, a 27-year-old, was killed instantly. The other, a 31-year-old, was taken to a Green Bay hospital and died of his injuries on August 6th.
Quarter size hail fell at the COOP observing site near Argonne.
As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.
| Event | Date | Age | Sex | Where | Kind |
|---|---|---|---|---|---|
| Lightning, Oconto | 2014-08-03 | 27 | Male | Under Tree | Direct |
| Lightning, Oconto | 2014-08-06 | 31 | Male | Under Tree | Direct |
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2014Every state in 2014This day in weather historyWarnings in Wisconsin, August 2014
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: 539841, 539844, 539847, 539888, 539848.