Scattered Thunderstorms developed and moved across southern WI during the afternoon and evening hours as a trough of low pressure approached the region. One strong thunderstorm produced a damaging wet microburst in Princeton.
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 MKX wrote it up.
Scattered Thunderstorms developed and moved across southern WI during the afternoon and evening hours as a trough of low pressure approached the region. One strong thunderstorm produced a damaging wet microburst in Princeton.
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 29, 2:29 PM CST, 2 hours 11 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 329 PM CDT MON JUN 29 2015 .TONIGHT AND TUESDAY...FORECAST CONFIDENCE...MEDIUM SHOWERS AND A FEW STORMS ACROSS CENTRAL/EASTERN CWA...DRIVEN BY LOW LEVEL CONVERGENCE AND DAYTIME HEATING...WILL LIKELY DECREASE LATE AFTERNOON AND EARLY EVENING. MEANWHILE...AN AREA OF SHOWERS AND STORMS ASSOCIATED WITH AN APPROACHING SHORTWAVE IS EXPECTED TO MOVE INTO THE NORTHWEST FORECAST AREA THIS EVENING. STILL LOOKS LIKE THE LINE MAY FALL APART AS IT HEADS EASTWARD...WITH SOME QUESTION AS TO HOW MUCH PRECIP WILL SURVIVE ALL THE WAY TO THE EAST. THUS JUST KEPT POPS AT CHANCE EAST OF MADISON. THERE WILL BE ANOTHER CHANCE FOR SHOWERS AND STORMS TUESDAY...THE HIGHEST CHANCE EAST TOWARD THE CENTER OF THE LOW/MID LEVEL CIRCULATION WHERE THERE WILL BE BETTER MOISTURE/LIFT TO WORK WITH. NAM IS THE OUTLIER AT THIS POINT WITH WARMER 925 MB TEMPS...WHILE MOST OTHER MODELS BRING IN COOLER TEMPS FROM THE NORTH DURING THE AFTERNOON BEHIND THE DEPARTING WAVE. LEANED TOWARD THE CONSENSUS OF MODELS...RESULTING IN HIGHS A FEW DEGREES BELOW NORMAL. .SHORT TERM...TUESDAY NIGHT THROUGH THURSDAY TUESDAY NIGHT...FORECAST CONFIDENCE HIGH QUIET WEATHER TUESDAY NIGHT IN REGION OF DRYING AND SUBSIDENCE BEHIND NEUTRAL-TILT 500 MB TROUGH THAT MOVES EAST OVER LOWER MI BY 00Z WED...AND FORCING/LIFT WITH A TRAILING SHORT WAVE PASSING JUST SW OF FORECAST AREA TUESDAY EVENING. OVERLY-MOIST NAM PRODUCING LIGHT RAIN/DRIZZLE IN SHORELINE CONVERGENCE REGION IN THE EVENING...BUT THIS LOWER-LEVEL MOISTURE NOT EVIDENT ON OTHER MODEL FORECAST SOUNDINGS. WILL LEAVE DRY BUT THERE COULD BE SOME LOW CLOUDS AND FOG UNTIL DRIER AIR OVERSPREADS THE REGION. WEAK COLD AIR ADVECTION ON NORTHEAST WINDS WILL DROP LOWS INTO THE LOW TO MID 50S NE..WITH UPPER 50S SW. WEDNESDAY...FORECAST CONFIDENCE HIGH HIGH PRESSURE BUILDS OVER THE REGION...WITH ANOTHER SHORT WAVE TAKING A PATH SOUTHWEST OF THE FORECAST AREA WEDNESDAY AFTERNOON AND EVENING. QPF OVER THE WEST ON NAM AGAIN APPEARS TO BE TIED TO OVERLY- MOIST BOUNDARY LAYER. WILL GO WITH CONSENSUS DRY FORECAST. 925 MB TEMPS SUPPORT MID-UPR 70S IN THE SW HALF OF THE CWA WITH THE COOL AND PERSISTENT N-NE FLOW OFF THE LAKE HOLDING HIGHS IN THE 60S TO LOWER 70S NE. WEDNESDAY NIGHT AND THURSDAY...FORECAST CONFIDENCE HIGH AXIS OF DEEPER SHORT WAVE ROTATING AROUND BASE OF EASTERN CANADIAN TROUGH CROSSES FROM LAKE SUPERIOR TO LAKE HURON WEDNESDAY NIGHT. NAM CARVES THE TROUGH DEEPER INTO NE WI...HOWEVER STABILITY AND MEAGER MOISTURE WITH SURFACE HIGH COVERING THE WESTERN GREAT LAKES WILL KEEP AREA DRY. BELOW NORMAL TEMPERATURE TREND WILL CONTINUE WITH MILD TEMPERATURES SIMILAR TO TUESDAY NIGHT AND WEDNESDAY. .LONG TERM...THURSDAY NIGHT THROUGH MONDAY...FORECAST CONFIDENCE MEDIUM ECMWF PHASING A SHORT WAVE MOVING ACROSS THE DAKOTAS WITH ANOTHER... STRONGER SHORT WAVE DROPPING THROUGH MANITOBA THURSDAY NIGHT... CARVING OUT A TROUGH THAT CROSSES THE WESTERN GREAT LAKES FRIDAY. PRECIPITATION MOVES ACROSS FORECAST AREA WITH ASSOCIATED SURFACE TROUGH. GFS AND GEMNH KEEP THE SHORT WAVES SEPARATE AND HIGH PRESSURE OVER AREA. LEANING TOWARD THE DRY SOLUTION...BUT WILL GO WITH BLENDED SLIGHT CHANCE POPS. ANY PRECIPITATION...IF IT DOES OCCUR...WILL PUSH EAST OF THE FORECAST AREA BY EVENING FOR THE START OF THE HOLIDAY WEEKEND. MOST OF THE WEEKEND LOOKS DRY AS THE HIGH PRESSURE BECOMES RE- ESTABLISHED OVER THE REGION EARLY SATURDAY...THEN SLOWLY MOVES EAST SATURDAY NIGHT AND SUNDAY. SOME MODEL DIFFERENCES IN TIMING AND CONFIGURATION OF NEXT WAVE AND ASSOCIATED SURFACE FEATURES...BUT CONSENSUS TIMING LOOKS TO PUT WESTERN CWA INTO SMALL CHANCES FOR SHOWERS AND STORMS SUNDAY AFTERNOON... WITH HIGHER CHANCE POPS SPREADING ACROSS THE REMAINDER OF SRN WI SUNDAY NIGHT AND MONDAY. UPPER 70S SATURDAY...TO LOW 80S SUNDAY FOR HIGHS. && .AVIATION/00Z TAFS/... CURRENT SHOWERS AND A FEW STORMS ACROSS CENTRAL/EASTERN CWA WILL LIKELY DECREASE LATE AFTERNOON AND EARLY EVENING. MEANWHILE...AN AREA OF SHOWERS AND STORMS IS EXPECTED TO MOVE INTO THE NORTHWEST FORECAST AREA THIS EVENING. STILL LOOKS LIKE THE LINE MAY FALL APART AS IT HEADS EASTWARD...WITH SOME QUESTION AS TO HOW MUCH PRECIP WILL SURVIVE ALL THE WAY TO THE EAST. THUS JUST KEPT POPS AT CHANCE EAST OF MADISON. LIGHT WINDS COMBINED WITH RECENT RAINFALL MAY RESULT IN SOME PATCHY FOG LATER TONIGHT INTO EARLY TUESDAY MORNING. THERE WILL BE ANOTHER CHANCE FOR SHOWERS AND STORMS TUESDAY...THE HIGHEST CHANCE IN THE EAST. OTHER THAN THE POTENTIAL FOR LOWER VSBYS IN FOG AND IN MODERATE/HEAVY SHOWERS...SHOULD SEE MAINLY VFR CONDITIONS PREVAIL THROUGH TUESDAY. && .MKX WATCHES/WARNINGS/ADVISORIES... WI...NONE. LM...NONE. && TONIGHT/TUESDAY AND AVIATION/MARINE...DDV TUESDAY NIGHT THROUGH MONDAY...REM
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 351 PM CDT MON JUN 29 2015 WIZ046-047-051-052-056>060-062>072-302100- MARQUETTE-GREEN LAKE-FOND DU LAC-SHEBOYGAN-SAUK-COLUMBIA-DODGE- WASHINGTON-OZAUKEE-IOWA-DANE-JEFFERSON-WAUKESHA-MILWAUKEE- LAFAYETTE-GREEN-ROCK-WALWORTH-RACINE-KENOSHA- 351 PM CDT MON JUN 29 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL WISCONSIN...SOUTH CENTRAL WISCONSIN AND SOUTHEAST WISCONSIN. .DAY ONE...TONIGHT SCATTERED THUNDERSTORMS ARE EXPECTED LATE THIS AFTERNOON AND EVENING...WITH STORMS LIKELY OVER NORTHWEST PORTIONS OF SOUTH CENTRAL WISCONSIN. THESE STORMS MAY PRODUCE SMALL HAIL AND GUSTY WINDS. THEY WILL ALSO BE SLOW MOVING AND MAY PRODUCE HEAVY RAINFALL. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH MONDAY THERE ARE SMALL CHANCES FOR THUNDERSTORMS ON SUNDAY AS A WEAK COLD FRONT ADVANCES INTO THE WESTERN GREAT LAKES FROM THE NORTHERN PLAINS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED. LMZ643>646-302100- SHEBOYGAN TO PORT WASHINGTON WI- PORT WASHINGTON TO NORTH POINT LIGHT WI- NORTH POINT LIGHT TO WIND POINT WI- WIND POINT WI TO WINTHROP HARBOR IL- 351 PM CDT MON JUN 29 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE MICHIGAN. .DAY ONE...TONIGHT SCATTERED THUNDERSTORMS WILL AFFECT THE NEARSHORE WATERS LATE THIS AFTERNOON AND EARLY EVENING AS WEAK LOW PRESSURE MOVES ACROSS THE WESTERN GREAT LAKES. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH MONDAY THERE ARE SMALL CHANCES FOR THUNDERSTORMS ON SUNDAY AS A WEAK COLD FRONT ADVANCES INTO THE WESTERN GREAT LAKES FROM THE NORTHERN PLAINS. REM WWW.WEATHER.GOV/MKX
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 432 PM CDT MON JUN 29 2015 WIZ069-292145- ROCK- 432 PM CDT MON JUN 29 2015 ...A STRONG THUNDERSTORM WILL AFFECT SOUTH CENTRAL ROCK COUNTY... AT 430 PM CDT...A STRONG THUNDERSTORM WAS NEAR ROCKTON...MOVING SOUTHEAST AT 30 MPH. PEA SIZE HAIL IS POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... BELOIT AND NEWARK. BRIEF HEAVY RAINFALL IS ALSO OCCURRING WITH THIS STORM. LAT...LON 4250 8931 4251 8932 4262 8913 4250 8894 TIME...MOT...LOC 2130Z 321DEG 28KT 4251 8917 HENTZ
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 445 PM CDT MON JUN 29 2015 WIZ046-047-292200- GREEN LAKE-MARQUETTE- 445 PM CDT MON JUN 29 2015 ...A STRONG THUNDERSTORM WILL AFFECT CENTRAL GREEN LAKE AND NORTHEASTERN MARQUETTE COUNTIES... AT 444 PM CDT...A STRONG THUNDERSTORM WAS NEAR REDGRANITE...OR 8 MILES WEST OF BERLIN...MOVING SOUTH AT 30 MPH. PEA SIZE HAIL IS POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... PRINCETON...GREEN LAKE...NESHKORO AND MARQUETTE. HEAVY RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY CAUSE LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. LAT...LON 4380 8889 4371 8918 4398 8927 4398 8896 TIME...MOT...LOC 2144Z 339DEG 37KT 4398 8912 HENTZ
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 529 PM CDT MON JUN 29 2015 WIZ047-292245- GREEN LAKE- 529 PM CDT MON JUN 29 2015 ...A STRONG THUNDERSTORM WILL AFFECT CENTRAL GREEN LAKE COUNTY... AT 528 PM CDT...A STRONG THUNDERSTORM WAS OVER PRINCETON...OR 9 MILES SOUTHWEST OF BERLIN...MOVING SOUTH AT 25 MPH. HALF INCH HAIL IS POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... MARKESAN...PRINCETON...GREEN LAKE...MANCHESTER...KINGSTON AND MARQUETTE. HEAVY RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY CAUSE LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. LAT...LON 4370 8889 4366 8915 4392 8916 4397 8899 TIME...MOT...LOC 2228Z 341DEG 22KT 4388 8908 HENTZ
The Green Bay radar (KGRB), 109 km away, was scanning. The volume nearest the first event began at 22:41 UTC.
1 thunderstorm wind. Local standard time, as filed.
About eight trees, mostly rotted, were uprooted in Princeton from a wet microburst. Large branches were also down throughout the city. Minor damage to a home and a garage when a tree fell on them.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2015Every state in 2015This day in weather historyWarnings in Wisconsin, June 2015
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: 574784.