An upper disturbance moving through the area produced severe thunderstorms over portions of central Upper Michigan on the afternoon of the 9th.
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 MQT wrote it up.
An upper disturbance moving through the area produced severe thunderstorms over portions of central Upper Michigan on the afternoon of the 9th.
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 Marquette, MI wrote its last area forecast discussion before the first event at Jul 9, 6:39 AM EST, 6 hours 1 minute earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MARQUETTE MI 739 AM EDT MON JUL 9 2012 .SHORT TERM...(TODAY AND TONIGHT) ISSUED AT 507 AM EDT MON JUL 9 2012 WV IMAGERY AND RUC ANALYSIS INDICATED WNW MID/UPPER LEVEL FLOW THROUGH THE NRN GREAT LAKES BTWN A RIDGE OVER WRN NOAM AND A TROUGH FROM FROM ERN CANADA INTO THE NE CONUS. A WEAK UPSTREAM SHORTWAVE TROUGH OVER NRN ONTARIO NEAR CYPL SUPPORTED AN AREA OF MID LEVEL CLOUDS AND AN ISOLD TSRA BTWN CYPL/CYQT. AT THE SFC...WITH A RIDGE EXTENDING FROM THE NRN PLAINS INTO THE UPPER GREAT LAKES...A VERY WEAK GRADIENT PERSISTED OVER THE CWA. IR LOOP SHOWED PATCHY MID CLOUDS INTO UPPER MI AND SOME STRATUS FROM ONTONAGON TO IWD THAT HAD MOVED IN OFF OF WRN LAKE SUPERIOR. TODAY...DAYTIME HEATING PUSHING TEMPS INTO THE MID TO UPPER 70S RESULTING IN MLCAPE VALUES TO AROUND 400 J/KG. SIMILAR TO SUNDAY...FCST SOUNDINGS (600-700 MB INVERSION AND DRY AIR ABOVE 700 MB) ARE LESS THAN FAVORABLE FOR TSTMS. HOWEVER...THE CYPL SHRTWV COMBINED WITH LOW LEVEL CONV NEAR LAKE BREEZE BOUNDARIES SHOULD BE ENOUGH TO SUPPORT ISOLD AFTERNOON SHRA/TSRA DEVELOPMENT OVER INLAND CNTRL UPPER MI THAT COULD SPREAD TO THE SOUTHEAST. WITH WET-BULB ZERO HEIGHTS ONLY AROUND 8K FT AND DCAPE VALUES NEAR 1K J/KG...SOME SMALL HAIL AND GUSTY WINDS MAY BE POSSIBLE IF ANY TSRA DEVELOP. TONIGHT...MODELS SUGGEST THAT ANOTHER WEAK SHRTWV WILL MOVE TOWARD UPPER MI LATE TONIGHT. THE NAM WAS AN OUTLIER COMPARED TO OTHER MODELS IN PRODUCING PCPN ASSOCIATED WITH THIS FEATURE...LEFT THE FCST DRY FOR NOW. FAVORABLE RADIATIONAL COOLING WITH SLIGHTLY LOWER DEWPOINTS INTO THE REGION SHOULD ALLOW TEMPS TO FALL INTO THE UPPER 40S TO AROUND 50 INLAND WITH READINGS IN THE UPPER 50S NEAR LAKE SUPERIOR. .LONG TERM...(TUESDAY THROUGH SUNDAY) ISSUED AT 507 AM EDT MON JUL 9 2012 STARTING 12Z TUE...THERE WILL BE AN AMPLIFIED MID/UPPER LEVEL RIDGE OVER THE W CONUS EXTENDING N THROUGH WRN CANADA. ALSO...THERE WILL BE A MID/UPPER LEVEL TROUGH OVER E CANADA AND E CONUS...INCLUDING OVER THE GREAT LAKES REGION. THIS PUTS THE CWA UNDER NW FLOW ALOFT...AND THERE WILL BE THE USUAL EMBEDDED SHORTWAVES IN THIS FLOW PATTERN. CLOSER TO THE SFC...THE MAIN AREA OF HIGH PRESSURE WILL BE TO THE SW OF THE CWA AT 12Z TUE...SO LOW LEVEL FLOW WILL GENERALLY BE FROM THE NW. EXPECT THE UPPER LEVEL PATTERN TO WEAKEN THROUGH THE REST OF THE PERIOD AS THE UPPER JET FOCUSES WELL N OF THE CONUS. BY THU...THE N PORTION OF THE UPPER RIDGE OVER THE W WILL HAVE MOVED INTO CENTRAL CANADA AND FAR NCENTRAL CONUS /INCLUDING OVER THE CWA/. ALSO DURING THIS TIME...THE SFC HIGH WILL HAVE MOVED SE OFF THE CWA...BRINGING MORE SW LOW LEVEL FLOW. AN UPPER TROUGH LOOKS TO MOVE INTO E/CENTRAL CANADA FRI THROUGH SUN...BRINGING INCREASED SLY FLOW AS A SFC TROUGH PUSHES INTO THE NRN PLAINS. THE PRECIP ASPECT OF THE FORECAST LOOKS PRETTY DRY. NO ORGANIZED OR WIDESPREAD PRECIP IS EXPECTED TUE THROUGH SUN...BUT THERE IS POTENTIAL FOR AFTERNOON/EVENING SHOWERS AND THUNDERSTORMS TUE THROUGH THU INLAND IF ANY SHORTWAVES MOVE THROUGH DURING THE HEAT OF THE DAY. WILL CONTINUE FORECAST OF SLIGHT CHANCE POPS FOR THESE DAYS. ALSO...COULD SEE SOME PRECIP NEXT WEEKEND WITH AN UPPER LEVEL TROUGH PUSHING INTO THE AREA...BUT NOT ENOUGH CONFIDENCE AT THIS TIME TO PUT SIGNIFICANT POPS IN THE FORECAST. TEMPS SHOULD BE FAIRLY CLOSE TO NORMAL FOR THE FIRST HAVE OF THE WEEK...WITH A GENERAL WARMING TREND FROM THU THROUGH SUN. && .AVIATION...(FOR THE 12Z TAFS THROUGH 12Z TUESDAY MORNING) ISSUED AT 738 AM EDT MON JUL 9 2012 AN AREA OF ST/FG OFF OF LAKE SUPERIOR THAT HAD MOVED INTO IWD SHOULD DISSIPATE BY MID MORNING. OTHERWISE...EXPECT VFR CONDITIONS THROUGHOUT THE FORECAST PERIOD. THERE IS A SLIGHT CHANCE OF AN ISOLATED THUNDERSTORM OR TWO NEAR SAWYER MONDAY AFTERNOON...BUT THE BETTER CHANCES STILL LOOK TO REMAIN SOUTH OF THE TAF SITE. WINDS SHOULD REMAIN FAIRLY LIGHT FROM THE NORTH THROUGH THE PERIOD AS HIGH PRESSURE SLOWLY BUILDS INTO THE REGION FROM THE WEST. && .MARINE...(FOR THE 4 AM LAKE SUPERIOR FORECAST ISSUANCE) ISSUED AT 507 AM EDT MON JUL 9 2012 HIGH PRESSURE SYSTEM WILL REMAIN IN CONTROL THROUGH THURSDAY AS IT SHIFTS EASTWARD TOWARD THE LOWER GREAT LAKES. WINDS WILL REMAIN BELOW 15 KNOTS AND GENERALLY OUT OF THE SOUTHWEST TO NORTHWEST QUADRANT THROUGH THE WEEK. && .MQT WATCHES/WARNINGS/ADVISORIES... UPPER MICHIGAN... NONE. LAKE SUPERIOR... NONE. LAKE MICHIGAN... NONE. && SHORT TERM...JLB LONG TERM...TITUS AVIATION...JLB MARINE...JLB
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MARQUETTE MI 413 AM EDT MON JUL 9 2012 MIZ001>007-009>014-084-085-100815- KEWEENAW-ONTONAGON-NORTHERN HOUGHTON-BARAGA-MARQUETTE-ALGER-LUCE- GOGEBIC-IRON-DICKINSON-MENOMINEE-DELTA-SOUTHERN SCHOOLCRAFT- SOUTHERN HOUGHTON-NORTHERN SCHOOLCRAFT- 413 AM EDT MON JUL 9 2012 /313 AM CDT MON JUL 9 2012/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN UPPER MICHIGAN AND CENTRAL UPPER MICHIGAN. .DAY ONE...TODAY AND TONIGHT ISOLATED THUNDERSTORMS ARE POSSIBLE...MAINLY DURING THE AFTERNOON AND EARLY EVENING OVER SOUTH CENTRAL UPPER MICHIGAN. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THERE IS A SLIGHT CHANCE OF THUNDERSTORMS TUESDAY THROUGH THURSDAY...MAINLY DURING THE AFTERNOON OVER INTERIOR PORTIONS OF UPPER MICHIGAN. .SPOTTER INFORMATION STATEMENT... THE NEED FOR WEATHER SPOTTER REPORTS IS NOT ANTICIPATED AT THIS TIME. LSZ162-240>251-263>267-100815- LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND PORTAGE MN BEYOND 5NM-SAXON HARBOR WI TO BLACK RIVER MI- BLACK RIVER TO ONTONAGON MI- ONTONAGON TO UPPER ENTRANCE OF PORTAGE CANAL MI- UPPER ENTRANCE OF PORTAGE CANAL TO EAGLE RIVER MI- EAGLE RIVER TO MANITOU ISLAND MI- MANITOU ISLAND TO POINT ISABELLE MI- POINT ISABELLE TO LOWER ENTRANCE OF PORTAGE CANAL MI- LOWER ENTRANCE OF PORTAGE CANAL TO HURON ISLANDS MI INCLUDING KEWEENAW AND HURON BAYS-HURON ISLANDS TO MARQUETTE MI- MARQUETTE TO MUNISING MI-MUNISING TO GRAND MARAIS MI- GRAND MARAIS TO WHITEFISH POINT MI- LAKE SUPERIOR FROM SAXON HARBOR WI TO UPPER ENTRANCE TO PORTAGE CANAL MI 5NM OFF SHORE TO THE US/CANADIAN BORDER INCLUDING ISLE ROYALE NATIONAL PARK- LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER- LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI BEYOND 5NM FROM SHORE- LAKE SUPERIOR EAST OF A LINE FROM MANITOU ISLAND TO MARQUETTE MI AND WEST OF A LINE FROM GRAND MARAIS MI TO THE US/CANADIAN BORDER BEYOND 5NM FROM SHORE- LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF SHORE TO THE US/CANADIAN BORDER- 413 AM EDT MON JUL 9 2012 /313 AM CDT MON JUL 9 2012/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN LAKE SUPERIOR...CENTRAL LAKE SUPERIOR AND WESTERN LAKE SUPERIOR. .DAY ONE...TODAY AND TONIGHT ISOLATED THUNDERSTORMS ARE POSSIBLE TONIGHT. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THUNDERSTORMS ARE POSSIBLE OVER FAR WESTERN LAKE SUPERIOR FRIDAY NIGHT THROUGH SUNDAY. .SPOTTER INFORMATION STATEMENT... THE NEED FOR WEATHER SPOTTER REPORTS IS NOT ANTICIPATED AT THIS TIME. LMZ221-248-250-100815- GREEN BAY NORTH OF LINE FROM CEDAR RIVER MI TO ROCK ISLAND PASSAGE-SEUL CHOIX POINT TO POINT DETOUR MI- 5NM EAST OF A LINE FROM FAIRPORT MI TO ROCK ISLAND PASSAGE- 413 AM EDT MON JUL 9 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN LAKE MICHIGAN. .DAY ONE...TODAY AND TONIGHT ISOLATED THUNDERSTORMS ARE POSSIBLE...MAINLY DURING THE AFTERNOON AND EARLY EVENING. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THUNDERSTORMS ARE POSSIBLE TUESDAY...AND AGAIN ON SUNDAY. .SPOTTER INFORMATION STATEMENT... THE NEED FOR WEATHER SPOTTER REPORTS IS NOT ANTICIPATED AT THIS TIME. TITUS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MARQUETTE MI 1234 PM EDT MON JUL 9 2012 MIZ004-091715- BARAGA- 1234 PM EDT MON JUL 9 2012 ...SIGNIFICANT WEATHER ALERT FOR BARAGA COUNTY UNTIL 115 PM EDT... AT 1231 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR KEWEENAW BAY...OR 9 MILES NORTHEAST OF BARAGA. THIS STORM WAS MOVING SOUTHEAST AT 15 MPH. DIME SIZE HAIL AND HEAVY DOWNPOURS ARE EXPECTED WITH THIS STORM. STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO...OR YOUR LOCAL TELEVISION STATIONS FOR LATER STATEMENTS AND POSSIBLE WARNINGS CONCERNING THIS WEATHER SITUATION. KLUBER
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MARQUETTE MI
1247 PM EDT MON JUL 09 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1244 PM HAIL PEQUAMING 46.85N 88.38W
07/09/2012 M0.50 INCH BARAGA MI TRAINED SPOTTER
HAIL STARTING TO COVER THE GROUND
&&
KFLEEGELSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MARQUETTE MI 128 PM EDT MON JUL 9 2012 MIZ005-091815- MARQUETTE- 128 PM EDT MON JUL 9 2012 ...SIGNIFICANT WEATHER ALERT FOR MARQUETTE COUNTY UNTIL 215 PM EDT... AT 127 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 6 MILES NORTH OF ISHPEMING. THIS STORM WAS MOVING SOUTHEAST AT 30 MPH. DIME SIZE HAIL AND HEAVY DOWNPOURS ARE EXPECTED WITH THIS STORM. STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO...OR YOUR LOCAL TELEVISION STATIONS FOR LATER STATEMENTS AND POSSIBLE WARNINGS CONCERNING THIS WEATHER SITUATION. KLUBER
The Marquette radar (KMQT), 5 km away, was scanning. The volume nearest the first event began at 17:42 UTC.
2 thunderstorm wind, 1 hail. Local standard time, as filed.
A National Weather Service employee measured dime sized hail and wind gusts to around 45 mph in Negaunee.
Dozens of tree branches were snapped off, and several large trees more than 18 inches in diameter fell onto grave markers at the Riverside Cemetery. Extensive tree damage was also reported at the Riverside Golf Club. Many trees greater than two feet in diameter were uprooted across the course. Very strong winds were observed by the golf club staff, but no damage was apparent to buildings.
A few eight-inch diameter trees were snapped off and fell on power lines causing a power outage. Pea-sized hail and heavy rain were also reported.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Michigan in 2012Every state in 2012This day in weather historyWarnings in Michigan, July 2012
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: 404401, 404396, 404400.