An upper disturbance moving through a warm and humid air mass produced strong to severe thunderstorms over Marquette County and a portion of Delta County on the 6th.
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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.
An upper disturbance moving through a warm and humid air mass produced strong to severe thunderstorms over Marquette County and a portion of Delta County on the 6th.
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 6, 6:36 AM EST, 24 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MARQUETTE MI 736 AM EDT SUN JUL 6 2014 .SHORT TERM...(TODAY AND TONIGHT) ISSUED AT 512 AM EDT SUN JUL 6 2014 THE LATEST 08Z WATER VAPOR LOOP SHOWS A VIGOROUS SHORTWAVE MOVING EAST THROUGH SRN MANITOBA. IR SATELLITE AND REGIONAL RADAR IMAGERY INDICATES CONVECTION FIRING AHEAD OF THIS SHORTWAVE AND ALONG/AHEAD OF SFC COLD FRONT. MCS FORMING OVER CENTRAL MN IS DIVING SOUTH FOLLOWING THETA-E RDGG...AND AXIS OF GREATEST INSTABILITY WITH MUCAPE APPROACHING 4000 J/KG SUPPORTED BY 30 KT 8H JET NOSING INTO THIS REGION. A SECOND CLUSTER OF STORMS IS MOVING EAST ACROSS ONTARIO AND FAR NRN LAKE SUPERIOR IN AREA OF STRONG 850 MB MOISTURE TRANSPORT AND WARM AIR ADVECTION AND ALONG GRADIENT OF 500-1000 J/KG MUCAPES AND 700-500 MB LAPSE RATES OF 6.5-7 C/KM. SOME OF THIS CONVECTION TO THE WEST HAS SPILLED INTO UPPER MI EARLY THIS MORNING BUT COVERAGE HAS BEEN ISOLD DUE TO RELATIVELY MORE STABLE AIR IN PLACE OVER THE AREA. TODAY AND TONIGHT...EXPECT COVERAGE OF SHRA/TSRA TO INCREASE FROM THE WEST THROUGH THE LATE MORNING INTO EARLY AFTERNOON AS MID-LVL Q-VECT CONV AHEAD OF THE SHORTWAVE SPREADS IN FROM THE WEST AND THE FRONTAL BOUNDARY DRAWS NEAR. CONVECTION WILL CONTINUE TO SPREAD EAST THROUGH THE AFTERNOON AND EARLY EVENING HOURS AS THE SHORTWAVE AND ASSOC FRONTAL BOUNDARY APPROACH FROM THE WEST AND THEN MOVE EAST ACROSS THE CWA. THERE WILL BE A CONDITIONAL RISK FOR STRONG/SEVERE STORMS THAT DEPENDS ON THE AMOUNT OF THICKER CLOUDS THAT LINGER INTO THE AFTERNOON FM ONGOING CONVECTION. IF ENOUGH CLEARING DEVELOPS FOR A FEW HOURS TO ALLOW TEMPS TO REBOUND INTO THE LOWER 80S WITH DEWPOINTS EXPECTED IN THE MID TO UPPER 60S...MODEL FCST MLCAPE VALUES INTO THE 1K-1.5K RANGE COMBINED WITH 0-6KM SHEAR OF 35-40 KNOTS WILL SUPPORT STRONG TO POSSIBLY SEVERE ORGANIZED STORMS. 0-1KM AND 0-3KM HELICITY VALUES RISING TO 150-200 M2/S2 AND IN EXCESS OF 250 M2/S2 RESPECTIVELY ALONG WITH FAVORABLE CURVED HODOGRAPH SHAPE COULD RESULT IN SOME ROTATING STORMS AND POSSIBLE SUPERCELLS. HOWEVER...IF MORE PROMINENT CLOUD COVER REMAINS INTO THE AFTERNOON WHICH LOOKS LIKE A BETTER BET AT THIS POINT...THEN THE GREATER INSTABILITY AND SEVERE POTENTIAL WOULD LIKELY STAY SOUTH OF UPPER MI AND OVER WI. LATEST SPC DAY1 OUTLOOK HAS REFLECTED THIS TREND BY MOVING SLIGHT RISK FOR SVR FARTHER SOUTH INTO SRN AND CENTRAL WI. BY 06Z MON...THE COLD FRONT WILL HAVE MOVED TO THE ERN CWA...PUSHING MOST OF THE CONVECTION E OF THE CWA BY THAT TIME. ALSO ANY PATCHY FOG THAT ADVECTS IN FROM THE MOIST HUMID AIRMASS OVER THE GREAT LAKES...MAINLY OVER THE KEWEENAW AND OVER THE SE AND ERN COUNTIES... SHOULD BEGIN TO DISSIPATE BY LATE EVENING/OVERNIGHT AS DRIER AIR ADVECTS IN WITH WESTERLY WINDS IN THE WAKE OF THE COLD FROPA. EXPECT HIGHS TODAY MAINLY IN THE LOWER 80S OVER THE INLAND WESTERN TWO-THIRDS WITH LOWER TO MID 70S FARTHER EAST AND SOUTHEAST DIRECTLY DOWNWIND OF LAKE MI. LOWS TONIGHT WILL RANGE FROM THE MID 50S NW TO THE MID 60S SOUTH CENTRAL. .LONG TERM...(MONDAY THROUGH SATURDAY) ISSUED AT 406 AM EDT SUN JUL 6 2014 COOLER AND DRIER AIR WILL SLOWLY TAKE OVER ON MONDAY. A SECONDARY COLD FRONT INITIALLY STRETCHING FROM THE LOW NEARING THE ONTARIO/QUEBEC BORDER THROUGH THE N MN BORDER AT 12Z MONDAY WILL SLOWLY EDGE E...AS HIGH PRESSURE WEAK HIGH PRESSURE BUILDS IN. DESPITE HIGH PRESSURE SETTLING ACROSS UPPER MICHIGAN MONDAY NIGHT...THE 500MB TROUGH WILL LINGER...AND CONTINUE TO BRING ABOUT SEVERAL SMALL DISTURBANCES. UNSETTLED WEATHER...WITH OFF AND ON LIGHT SHOWERS WILL REMAIN POSSIBLE OVER MAINLY WESTERN UPPER MICHIGAN FOR THE FIRST HALF OF THE WORK WEEK. TEMPS IN THE 60S TO MID 70S WILL BE COMMON...WHICH IS BELOW NORMAL. MONDAY NIGHT INTO EARLY TUESDAY LOOKS TO BE THE BEST CHANCE OF SEEING PRECIPITATION.... CURRENTLY HAVE AROUND A QUARTER OF AN INCH GOING...BUT SOME GUIDANCE WAS INDICATING THE POTENTIAL FOR QUITE A BIT MORE OVER THE S HALF OF UPPER MI /CLOSER TO THE SFC LOW BRUSHING THE CWA/. ONLY EXPECTING A SLIGHT CHANCE OF THUNDERSTORMS...WITH A BETTER CHANCE WELL TO OUR S. ANOTHER LOW PRESSURE SYSTEM OVER FAR N ONTARIO TUESDAY AFTERNOON WILL SINK OVER N LAKE SUPERIOR TUESDAY NIGHT INTO WEDNESDAY...ALTHOUGH THE 06/00Z GFS IS AN OUTLIER AND DOESN/T REALLY HAVE THIS FEATURE AT THE SFC IT STILL HAS THE MAIN 500MB TROUGH DIVING IN ALOFT. DUE TO LIMITED MOISTURE...POPS WHERE KEPT IN THE CHANCE OR BELOW RANGE. AT THIS TIME...DRY HIGH PRESSURE IS EXPECTED TO SETTLE ACROSS THE UPPER GREAT LAKES REGION AT THE SFC AND ALOFT WEDNESDAY NIGHT THROUGH FRIDAY. THERE ARE SOME DISCREPANCIES TO THE 500MB TROUGH...AND HOW QUICKLY IT EXITS E. THE ECMWF IS THE QUICKEST TO BRING BACK RIDGING AT 500MB...WITH THE CANADIAN SOLUTION KEEPING A TROUGH ACROSS THE E HALF OF THE CWA INTO FRIDAY. A BLENDED SOLUTION LOOKS REASONABLE FOR THURSDAY AFTERNOON ON. && .AVIATION...(FOR THE 12Z TAFS THROUGH 12Z MONDAY MORNING) ISSUED AT 726 AM EDT SUN JUL 6 2014 MVFR CONDITIONS HAVE DEVELOPED THIS MORNING AT MOST OF THE TAF SITES AS ADDED MOISTURE FROM OVERNIGHT STORMS AIDING THE LOW CLOUD DEVELOPMENT. CONVECTION COVERAGE WILL INCREASE FROM LATE MORNING INTO MID AFTERNOON AS THE COLD FRONT APPROACHES FM THE WEST. CONDITIONS SHOULD IMPROVE BACK TO VFR BY LATE SUN AFTERNOON IN THE WEST BY LATE EVENING/OVERNIGHT FOR KSAW AS DRYING OCCURS IN THE WAKE OF THE COLD FRONT. && .MARINE...(FOR THE 4 AM LAKE SUPERIOR FORECAST ISSUANCE) ISSUED AT 406 AM EDT SUN JUL 6 2014 FOG WILL CONTINUE ACROSS LAKE SUPERIOR INTO MONDAY. WINDS ARE EXPECTED TO BE BELOW 25KTS THROUGH THE PERIOD /OUTSIDE OF ANY STRONG SHOWERS OR THUNDERSTORMS/. LOW PRESSURE ACROSS N MINNESOTA AND W ONTARIO WILL DEEPEN SLIGHTLY OVER CENTRAL ONTARIO AND N LAKE SUPERIOR THIS EVENING...BEFORE MOVING ACROSS QUEBEC ON MONDAY. BRIEF HIGH PRESSURE WILL SLIDE ACROSS LAKE SUPERIOR MONDAY NIGHT...AS WEAK LOW PRESSURE PUSHES ACROSS LAKE MICHIGAN AND LAKE HURON ON TUESDAY. ANOTHER WEAK LOW ACROSS ONTARIO TUESDAY NIGHT IS EXPECTED TO SINK ACROSS LAKE SUPERIOR ON WEDNESDAY...BEFORE STRONGER HIGH PRESSURE SETTLES ACROSS THE UPPER GREAT LAKES WEDNESDAY NIGHT THROUGH AT LEAST THURSDAY. && .MQT WATCHES/WARNINGS/ADVISORIES... UPPER MICHIGAN... NONE. LAKE SUPERIOR... NONE. LAKE MICHIGAN... NONE. && SHORT TERM...VOSS LONG TERM...KF AVIATION...VOSS MARINE...KF
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MARQUETTE MI 404 AM EDT SUN JUL 6 2014 MIZ001>007-009>014-084-085-071200- KEWEENAW-ONTONAGON-NORTHERN HOUGHTON-BARAGA-MARQUETTE-ALGER-LUCE- GOGEBIC-IRON-DICKINSON-MENOMINEE-DELTA-SOUTHERN SCHOOLCRAFT- SOUTHERN HOUGHTON-NORTHERN SCHOOLCRAFT- 404 AM EDT SUN JUL 6 2014 /304 AM CDT SUN JUL 6 2014/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN UPPER MICHIGAN AND CENTRAL UPPER MICHIGAN. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS ARE POSSIBLE TODAY AND TONIGHT. SOME OF THE STORMS COULD BE STRONG TO SEVERE FROM THIS AFTERNOON THROUGH THIS EVENING...PARTICULARLY SOUTH CENTRAL. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THUNDERSTORMS ARE POSSIBLE MONDAY NIGHT INTO TUESDAY MORNING...AND AGAIN FRIDAY THROUGH SATURDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING. LSZ162-240>251-263>267-071200- 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- 404 AM EDT SUN JUL 6 2014 /304 AM CDT SUN JUL 6 2014/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN LAKE SUPERIOR...CENTRAL LAKE SUPERIOR AND WESTERN LAKE SUPERIOR. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS ARE POSSIBLE ACROSS ALL OF LAKE SUPERIOR TODAY...AND OVER THE EAST HALF OF LAKE SUPERIOR TONIGHT. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THUNDERSTORMS ARE POSSIBLE OVER PRIMARILY WESTERN LAKE SUPERIOR TUESDAY NIGHT...AND AGAIN THURSDAY NIGHT AND FRIDAY BEFORE EXPANDING ACROSS ALL OF LAKE SUPERIOR FRIDAY NIGHT INTO SATURDAY. .SPOTTER INFORMATION STATEMENT... THE NEED FOR WEATHER SPOTTER REPORTS IS NOT ANTICIPATED AT THIS TIME. LMZ221-248-250-071200- 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- 404 AM EDT SUN JUL 6 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN LAKE MICHIGAN. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS ARE POSSIBLE. SOME STORMS THIS AFTERNOON INTO THIS EVENING COULD BE STRONG TO SEVERE. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THUNDERSTORMS ARE POSSIBLE MONDAY NIGHT INTO TUESDAY MORNING...AND AGAIN FRIDAY NIGHT THROUGH SATURDAY. .SPOTTER INFORMATION STATEMENT... THE NEED FOR WEATHER SPOTTER REPORTS IS NOT ANTICIPATED AT THIS TIME. KF
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MARQUETTE MI 656 AM EDT SUN JUL 6 2014 MIZ002-061145- ONTONAGON- 656 AM EDT SUN JUL 6 2014 ...SIGNIFICANT WEATHER ALERT FOR ONTONAGON COUNTY UNTIL 745 AM EDT... AT 653 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 20 MILES WEST OF SILVER CITY...OR 29 MILES NORTH OF IRONWOOD. THIS STORM WAS MOVING EAST AT 35 MPH. DIME SIZE HAIL AND WINDS UP TO 40 MPH ARE EXPECTED WITH THIS STORM. * LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE... LAKE OF THE CLOUDS... MIRROR LAKE... WHITE PINE... STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO...OR YOUR LOCAL TELEVISION STATIONS FOR LATER STATEMENTS AND POSSIBLE WARNINGS CONCERNING THIS WEATHER SITUATION. VOSS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MARQUETTE MI 745 AM EDT SUN JUL 6 2014 MIZ006-061230- ALGER- 745 AM EDT SUN JUL 6 2014 ...SIGNIFICANT WEATHER ALERT FOR ALGER COUNTY UNTIL 830 AM EDT... AT 743 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR DEERTON...OR 16 MILES WEST OF MUNISING. THIS STORM WAS MOVING EAST AT 25 MPH. DIME SIZE HAIL AND WINDS UP TO 40 MPH ARE EXPECTED WITH THIS STORM. * LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE... DEERTON... EBEN JUNCTION... CHATHAM... AU TRAIN... FOREST LAKE... CHRISTMAS... 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), 95 km away, was scanning. The volume nearest the first event began at 11:57 UTC.
2 heavy rain, 2 tornado, 1 thunderstorm wind. Local standard time, as filed.
The observer nine miles south of Rapid River measured 1.72 inches of rainfall in 24 hours.
The automated station six miles southeast of Big Bay measured 1.85 inches of rainfall in 24 hours. Observers in Negaunee Township, Marquette and Harvey measured between 1.5 and 1.7 inches over a 24-hour period.
A weak tornado touched down in northeast Iron County and then tracked across into southwest Marquette County. The tornado downed or snapped off numerous trees along its path.
A weak tornado touched down in northeast Iron County and then tracked into southwest Marquette County. The tornado downed or snapped off numerous trees along its path.
There was a public report of a tree down over a vehicle in Ishpeming.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Michigan in 2014Every state in 2014This day in weather historyThe tornado archive for Michigan, 2014Warnings in Michigan, July 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: 532446, 532444, 532538, 534638, 532411.