A gravity wave was the probable cause of damaging wind in the Ironwood area early on the 12th.
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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.
A gravity wave was the probable cause of damaging wind in the Ironwood area early on the 12th.
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 Jun 12, 3:00 AM CST, 0 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MARQUETTE MI 500 AM EDT THU JUN 12 2008 .DISCUSSION... WV IMAGERY AND RUC ANALYSIS INDICATED UNSEASONABLY DEEP MID/UPPER LEVEL LOW OVER ERN MT RESULTING IN SW FLOW FROM THE SRN PLAINS TO THE WRN GREAT LAKES. AT THE SFC...LOW PRES WAS LOCATED OVER ND WITH A COLD FRONT INTO CNTRL IA AND A WARM FRONT THROUGH SRN WI FROM TRIPLE POINT OVER S CNTRL MN. A LARGE AREA OF SHRA/TSRA EXTENDED FROM NE MN AND WRN LAKE SUPERIOR THROUGH SE MN AND CNTRL IA TO NE KS SUPPORTED BY STRONG MOISTURE TRANPORT WITH 50-60 KT SRLY 850 MB WIND AND MODERATE TO STRONG 700-300 MB QVECTOR CONV AND UPPER LEVEL DIVERGENCE/DIFFLUENCE. STRONG WIND GUSTS TO 40 KT AT KHYR AND THEN AT KIWD WITH VEERING WINDS FALLING SHARP PRES DROP/RISE MAY HAVE RESULTED FROM A GRAVITY WAVE. SYNOPTIC SETTING IS FAVORABLE FOR GW GENERATION VIA GEOSTROPHIC ADJUSMENT WITH 250 MB JET STREAK MOVING TOWARD INFLECTION AXIS AND DECENT DUCT LAYER IN PLACE NORTH OF THE WARM FRONT. TODAY AND TONIGHT...MODELS WERE IN DECENT AGREEMENT WITH THE SLOW PROGRESSION OF THE MID LEVEL LOW TO THE ENE AND ASSOCIATED HEIGHT FALLS INTO THE WRN GREAT LAKES. SO...EXPECT THE SHRA/TSRA AREA TO MOVE SLOWLY EASTWARD FROM THE W THIRD OF UPPER MICHIGAN THIS MORNING INTO CNTRL BY MID AFTERNOON AND INTO THE EAST THIS EVENING. AXIS OF PWAT VALUES AOA 1.5 INCHES AND CONTINUED STRONG MOISTURE TRANSPORT COULD STILL BRING PCPN AMOUNTS INTO THE 1-2 INCH RANGE...ESPECIALLY OVER THE SE. HOWEVER...UNCERTAINTY REMAINS WHERE THE HEAVIER SHRA/TSRA BANDS WILL SET UP. THE EAST TWO-THIRDS REMAINS IN THE SPC SLIGHT RISK TODAY. SINCE SHEAR VALUES WILL BE STRONG (0-6KM 50-60 KT AND 0-3KM 40-50 KT) THE MAIN QUESTION WILL BE HOW MUCH INSTABILITY WILL DEVELOP. MODIFIED SOUNDINGS WITH WORST CASE TEMP/DEWPOINTS IN THE MID 70S AND MID 60S WOULD GIVE CAPE VALUES AROUND 1K J/KG. GIVEN THE AMOUNT OF CLOUD COVER EXPECTED AND LESS THAN FAVORABLE SSE FLOW FOR BEST MOISTURE ADVECTION...CONFIDENCE IS LIMITED IN AMOUNT OF INSTABILITY THAT WILL BE AVAILABLE. EVEN CAPE VALUES IN THE 400-800 J/KG RANGE MAY BE ENOUGH TO SUPPORT SOME LINEAR TSTM SEGMENTS WITH SVR WIND POTENTIAL...ESPECIALLY OVER THE EAST HALF THIS EVENING. SOME STRONGER STORMS MAY BE ALSO CAPABLE OF PRODUCING LARGE HAIL. FRIDAY...WITH THE MID LEVEL LOW DRIFTING SLOWLY TOWARD NW ONTARIO...ANOTHER WEAK SHRTWV AND SECONDARY COLD FRONT/SFC TROUGH COULD SET OFF A FEW SHRA/TSRA. WITH 850 MB TEMPS AROUND 11C...SW WINDS AND DEEP MIXING EXPECT MAX READINGS WELL INTO THE MID 70S...AND EVEN WARMER FOR LOCATIONS FAVORED BY DOWNSLOPE FLOW. SAT...ANOTHER TROF AND SLIGHTLY STRONG SHRTWV ALSO AIDED BY UPPER LEVEL DIV WITH THE LEFT EXIT OF THE 250-300 JET COULD SUPPORT ANOTHER ROUND OF SHRA/TSRA...ESPECIALLY DURING/AFTER PEAK HEATING. LOW FREEZING HEIGHTS NEAR 9K FT MAY ALSO FAVOR POTENTIAL FOR SMALL TO MARGINALLY SEVERE HAIL. && .AVIATION (FOR THE 06Z TAF ISSUANCE)... 07Z UPDATE...RAIN ENDED AT CMX. WITH THE UPSLOPING E WIND...THE VIS AND CIG DROPPED TO VLIFR IN FOG. THIS AGAIN LOOKS TO BE TEMPORARY... AS SOMEWHERE BETWEEN 09-10Z THE WINDS RIGHT ABOVE THE SURFACE TURN SE OR EVEN SOUTH...WHICH AS STATED BELOW RESULTS IN DOWNSLOPING OFF THE HURON MOUNTAINS. THIS DOWNSLOPING SHOULD BE ABLE TO DISSIPATE THE FOG AND LOW CLOUDS. FOR THE NEXT FEW HOURS...AXIS OF LOW-LEVEL JET INTO WRN UPPER MI SHOULD RESULT IN PERIODS OF -SHRA/SHRA (AND POSSIBLY A BRIEF THUNDERSTORM) AFFECTING KCMX. ERLY LOW-LEVEL WINDS AT KCMX WILL ALSO CAUSE CIG AND POTENTIAL VIS PROBLEMS AS THE UPSLOPING FLOW RESULTS IN PERIODS OF IFR/LIFR CIGS AND IFR/LIFR VIS IN FOG DURING BREAKS IN PCPN. IT DOES APPEAR...HOWEVER...THAT WINDS RIGHT ABOVE THE SURFACE IN A FEW HOURS GO MORE SE OR EVEN SOUTH...WHICH DOWNSLOPES OFF THE HURON MOUNTAINS AND WILL LIKELY GET RID OF ANY LOW CIG/VIS. KSAW IS SITUTATED IN DRIER LOW TO MID LEVEL AIR ON THE EAST SIDE OF THE LOW LEVEL JET...THEREFORE VFR CONDITIONS ARE PLANNED THERE THROUGH THE NIGHT. WITH LOW-LEVEL JET...LLWS IS EXPECTED AT BOTH SITES OVERNIGHT. SHRA AND POSSIBLY THUNDER WILL RETURN THU...LATE MORNING AT KCMX AND EARLY AFTN AT KSAW. AT A MINIMUM...EXPECT MVFR CIGS TO REDEVELOP WITH PCPN. ANY IMPROVEMENT THU EVENING IS QUESTIONABLE AS WEAKENING COLD FRONT SLOWLY MOVES INTO THE AREA AND PRES GRADIENT SLACKENS WHICH MAY RESULT IN LOW-LEVEL MOISTURE LINGERING. IN FACT...CONDITIONS MAY DETERIORATE TO IFR OR LOWER. && .MARINE (FOR THE 4 AM LAKE SUPERIOR FORECAST ISSUANCE)... GALES THAT WERE ON FAR WESTERN LAKE SUPERIOR EARLIER TONIGHT HAVE BEEN DIMINISHING...AND THIS TREND WILL CONTINUE THROUGH TODAY AS A COLD FRONT APPROACHES FROM MN. HOWEVER...AS THE FRONT NEARS...SE WINDS ON NORTH CENTRAL AND EASTERN LAKE SUPERIOR WILL INCREASE... LIKELY HITTING NEAR 30 KT BY 8 AM EDT. HAVE CONTINUED NOT TO GO WITH ANY GALE WARNING FOR THIS SE WIND...DESPITE GALE FORCE WINDS RIGHT ABOVE THE LAKE SURFACE. THIS IS BECAUSE THE AIR MOVING OVER LAKE SUPERIOR IS MUCH WARMER THAN THE LAKE. WILL INCLUDE AN OCCASIONAL GROUP IN THE MAFOR FOR GALES...THOUGH...SINCE HIGHER PLATFORMS SUCH AS ROCK OF AGES ARE REPORTING GUSTS OVER GALE FORCE. THESE SE WINDS WILL DIMINISH THIS AFTERNOON INTO TONIGHT AS THE FRONT CROSSES LAKE SUPERIOR. BEYOND TONIGHT...WINDS SHOULD REMAIN AT OR BELOW 25 KNOTS THORUGH THE REMAINDER OF THE FORECAST. && .MQT WATCHES/WARNINGS/ADVISORIES...NONE. && DISCUSSION...JLB AVIATION...ROLFSON/AJ MARINE...AJ
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MARQUETTE MI 414 PM EDT WED JUN 11 2008 MIZ001>007-009>014-084-085-121200- KEWEENAW-ONTONAGON-NORTHERN HOUGHTON-BARAGA-MARQUETTE-ALGER-LUCE- GOGEBIC-IRON-DICKINSON-MENOMINEE-DELTA-SOUTHERN SCHOOLCRAFT- SOUTHERN HOUGHTON-NORTHERN SCHOOLCRAFT- 414 PM EDT WED JUN 11 2008 /314 PM CDT WED JUN 11 2008/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN UPPER MICHIGAN AND CENTRAL UPPER MICHIGAN. .DAY ONE...TONIGHT THERE IS A CHANCE OF THUNDERSTORMS ACROSS THE WEST HALF OF UPPER MICHIGAN. FREQUENT LIGHTNING AND HEAVY RAINFALL ARE EXPECTED TO BE THE MAIN HAZARDS FROM THE STORMS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY SHOWERS AND THUNDERSTORMS ARE EXPECTED ACROSS THE AREA THURSDAY THROUGH SUNDAY NIGHT. IN ADDITION TO LIGHTNING AND HEAVY RAINFALL...THERE IS A SLIGHT RISK FOR THE STORMS TO BECOME SEVERE...PRODUCING LARGE HAIL AND DAMAGING WIND GUSTS THURSDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THURSDAY AFTERNOON INTO THURSDAY NIGHT. LSZ162-240>251-263>267-121200- 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- 414 PM EDT WED JUN 11 2008 /314 PM CDT WED JUN 11 2008/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN LAKE SUPERIOR...CENTRAL LAKE SUPERIOR AND WESTERN LAKE SUPERIOR. .DAY ONE...TONIGHT THERE IS A CHANCE OF THUNDERSTORMS OVER THE WEST HALF OF LAKE SUPERIOR. FREQUENT LIGHTNING IS EXPECTED TO BE THE MAIN HAZARD FROM THE STORMS. GALE FORCE WINDS UP TO 35 KNOTS IS EXPECTED ACROSS FAR WESTERN LAKE SUPERIOR THROUGH LATE TONIGHT. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY SHOWERS AND THUNDERSTORMS ARE EXPECTED ACROSS LAKE SUPERIOR THURSDAY THROUGH SUNDAY NIGHT. IN ADDITION TO LIGHTNING...THERE IS A SLIGHT RISK FOR THE STORMS TO BECOME SEVERE...PRODUCING LARGE HAIL AND STRONG WINDS THURSDAY AFTERNOON AND EVENING. AREAS OF FOG...POTENTIALLY HAVING VISIBILITIES OF LESS THAN ONE QUARTER OF A MILE...WILL DEVELOP ON LAKE SUPERIOR LATE TONIGHT...THEN DISSIPATE WEST TO EAST FRIDAY MORNING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THURSDAY AFTERNOON INTO THURSDAY NIGHT. LMZ221-248-250-121200- 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- 414 PM EDT WED JUN 11 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN LAKE LAKE MICHIGAN. .DAY ONE...TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY SHOWERS AND THUNDERSTORMS ARE EXPECTED THURSDAY AFTERNOON AND THURSDAY NIGHT. IN ADDITION TO LIGHTNING...THERE IS A SLIGHT RISK FOR THE STORMS TO BECOME SEVERE...PRODUCING LARGE HAIL AND STRONG WINDS. THERE IS A CHANCE FOR MORE THUNDERSTORMS FRIDAY NIGHT THROUGH SUNDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED LATE THURSDAY AFTERNOON INTO THURSDAY NIGHT. MICHELS
The national radar mosaic for the moment the first event began.
1 high wind. Local standard time, as filed.
Ironwood Public Safety reported numerous trees down across the Ironwood area. One large tree fell across two lanes of Highway US-2.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Michigan in 2008Every state in 2008This day in weather historyWarnings in Michigan, June 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: 111371.