A tight pressure gradient between strong high pressure to the northeast and strengthening low pressure over south central Canada caused damaging south winds over eastern Alger and northern Luce County on the evening of the 19th.
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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 tight pressure gradient between strong high pressure to the northeast and strengthening low pressure over south central Canada caused damaging south winds over eastern Alger and northern Luce County on the evening of the 19th.
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 Sep 19, 6:45 PM EST, 15 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MARQUETTE MI 745 PM EDT FRI SEP 19 2014 .SHORT TERM...(THIS EVENING THROUGH SATURDAY) ISSUED AT 359 PM EDT FRI SEP 19 2014 MAIN CONCERNS DURING THIS TIME PERIOD IS THE GUSTY WIND THIS AFTERNOON ALONG WITH SHOWER AND THUNDERSTORM POTENTIAL TONIGHT AND SATURDAY. THIS AFTERNOON...THE MAIN ISSUE THIS AFTERNOON IS THE CONTINUED STRONG WIND GUSTS ACROSS THE REGION. THIS IS DUE TO A VERY TIGHT PRESSURE GRADIENT BETWEEN STRONG HIGH PRESSURE DEPARTING OVER THE NORTHEAST AND STRENGTHENING LOW PRESSURE PUSHING FROM MANITOBA INTO ONTARIO. MODELED 850MB WINDS ARE PROGGED TO BE AROUND 40 TO 45 KNOTS ACROSS THE AREA. THIS IS ALSO SUPPORTED BY THE MQT VAD WIND PROFILES. WHILE WE MAY NOT ACTUALLY ABLE TO MIX UP TO 850MB...IT DOES LOOK LIKE WE COULD MIX TO NEAR 900MB WHICH WOULD EASILY GIVE WIND GUSTS AROUND 30 TO 35 MPH WITH A FEW GUSTS CLOSE TO 40 MPH...ESPECIALLY OVER THE CENTRAL AND EASTERN U.P. AS THE GRADIENT SHIFTS EASTWARD BY LATE AFTERNOON EXPECT WINDS TO DIMINISH OVER THE WESTERN HALF OF THE UPPER PENINSULA...HOWEVER...THE EAST MAY SEE STRONGER GUSTS THROUGH THE EARLY EVENING HOURS. AS FAR AS PRECIPITATION GOES...MODELS CONTINUE TO SLOW THE PRECIPITATION MOVEMENT INTO THE UPPER PENINSULA. A WARM FRONT WILL CONTINUE TO LIFT NORTH OF THE U.P. LATE THIS AFTERNOON...ALLOWING SHOWERS AND A FEW THUNDERSTORMS TO DEVELOP. THIS WILL REMAIN MAINLY OVER THE FAR WESTERN U.P. WHERE THE BETTER ISENTROPIC ASCENT AND INCREASED MOISTURE REMAINS. ADDITIONALLY...THE BETTER SYSTEM FORCING WILL REMAIN NORTH AND WEST OF THE U.P. AS SHOWN BY ANALYZING DEEP LAYER QDIV ALONG WITH DEEP LAYER RH. TONIGHT THROUGH SATURDAY...A COLD FRONT WILL APPROACH THE UPPER GREAT LAKES REGION TONIGHT AS THE SURFACE LOW CONTINUES ACROSS ONTARIO. THE BETTER FORCING THROUGH TONIGHT WILL REMAIN OVER MAINLY THE NORTH HALF OF THE UPPER PENINSULA...CLOSER TO THE LOW PRESSURE CENTER. HAVE GENERALLY PLACED THE BEST POPS OVER LAKE SUPERIOR...HOWEVER...AN INCREASED CHANCE OF SHOWERS AND A FEW THUNDERSTORMS WILL BE POSSIBLE AS THE COLD FRONT PUSHES THROUGH THE REGION AS SHOWN BY ANALYZING 850MB THETA E ALONG WITH SURFACE WINDS. THE INCREASED INSTABILITY TONIGHT WILL COME FROM COOLER AIR ALOFT ASSOCIATED WITH AN UPPER LEVEL 500MB SHORTWAVE PROGGED TO PUSH ACROSS THE REGION OVERNIGHT. PLENTY OF MOISTURE WILL REMAIN IN PLACE FOR SHOWERS AND THUNDERSTORMS AS SOUNDING REMAIN FAIRLY MOIST AND 1000-500MB RH VALUES REMAIN FAIRLY HIGH. THE COLD FRONT WILL BE OVER THE EASTERN UPPER PENINSULA BY 18Z SATURDAY...PUSHING MOST OF THE SHOWER AND THUNDERSTORM POTENTIAL OVER THE FAR EASTERN U.P. A FEW THUNDERSTORMS COULD BE STRONG SATURDAY AFTERNOON AHEAD OF THE COLD FRONT OVER THE FAR EASTERN U.P. SATURDAY AFTERNOON AS THE SHORTWAVE AND COLD FRONT BECOME NEARLY COLLOCATED WHILE SHEAR VALUES AROUND AROUND 35 TO 40 KNOTS PERPENDICULAR TO THE FRONT. STRONG WIND GUSTS AND SMALL HAIL WOULD BE THE MAIN THREAT. BY LATE IN THE DAY SATURDAY...ADDITIONAL SHOWERS AND AN ISOLATED THUNDERSTORM OR TWO WILL BEGIN PUSHING IN OVER THE FAR WEST AS THE NEXT 500MB SHORTWAVE ROTATES INTO THE THE AREA. .LONG TERM...(SATURDAY NIGHT THROUGH FRIDAY) ISSUED AT 348 PM EDT FRI SEP 19 2014 SATURDAY NIGHT AND SUNDAY...A SERIES OF MID-LEVEL SHORTWAVES WILL BE TRACKING AROUND THE BASE OF A BROADER TROUGH ACROSS ONTARIO AND HUDSON BAY. A SUBTLE SHORTWAVE AND SFC COLD FRONT WILL BE EXITING THE EASTERN CWA AT THE BEGINNING OF THE PERIOD WHILE A STRONGER SHORTWAVE TRACKS SE ACROSS MN. MEANWHILE...AN ASSOCIATED SFC LOW WILL BE FORMING ON A TRAILING SFC TROUGH FROM THE COLD FRONT CROSSING THE CWA SATURDAY AFTERNOON. WEAK LOW-LEVEL ISENTROPIC LIFT AND A NEGATIVE UPPER PV ANOMALY WILL TRACK ACROSS NORTHERN WI AND MUCH OF UPPER MI SATURDAY NIGHT...THOUGH DEEP MOISTURE WILL HAVE DECREASED BY THIS TIME BEHIND THE LEAD SHORTWAVE/COLD FRONT. HOWEVER...OVERALL DYNAMICS WILL BE ENOUGH TO RESULT IN RAIN ACROSS MUCH OF THE CWA..ESPECIALLY THE SOUTHWEST HALF. THE MID-LEVEL TROUGH AXIS DOES NOT CLEAR THE CWA UNTIL LATE IN THE DAY SUNDAY...SO ISOLATED TO SCATTERED SHOWERS COMBINED WITH PLENTY OF CLOUDS SHOULD CONTINUE UNTIL AT LEAST SUNDAY AFTERNOON. SUNDAY NIGHT THROUGH MONDAY NIGHT...MID-LEVEL NW FLOW WILL SET-IN OVER THE REGION THROUGH THIS PERIOD. A SFC RIDGE EXTENDING NORTHEASTWARD FROM HIGH PRESSURE OVER THE CENTRAL PLAINS WILL CROSS THE CWA SUNDAY NIGHT. TEMPS ARE A BIT TRICKY TO PIN DOWN AS THERE ARE INDICATIONS THAT LOW-LEVEL CLOUDS MAY LINGER INTO THE EVENING ACROSS THE AREA. HOWEVER...CLEARING SHOULD OCCUR OVERNIGHT. WENT WITH THE LOWER END OF TEMP GUIDANCE IN THE MID 30S FOR INTERIOR LOCATIONS. A WEAK SHORTWAVE WILL TRACK SOUTHEASTWARD OUT OF FAR NORTHERN CANADA...PASSING BETWEEN LAKE SUPERIOR AND JAMES BAY MONDAY AFTERNOON AND EVENING. AN ASSOCIATED SFC TROUGH WILL THEN CROSS UPPER MI MONDAY NIGHT. MID-LEVEL MOISTURE IS LACKING...AND WITH THE RIGHT ENTRANCE OF THE UPPER JET OVERHEAD AND MID-LEVEL Q-VECTOR CONV TIED DIRECTLY TO THE TROUGH...AM EXPECTING A DRY FRONTAL PASSAGE WITH ONLY SOME SCATTERED CLOUDS. TUESDAY THROUGH FRIDAY...A GRADUAL WARMING TREND WILL COMMENCE AS ANOTHER SFC HIGH PRESSURE TRACKS SOUTHEASTWARD ACROSS NORTHERN ONTARIO TUESDAY WHILE A MID-LEVEL RIDGE BUILDS OVER THE UPPER MS VALLEY. THIS WILL BRING DRY WEATHER THROUGH MUCH OF WEDNESDAY. AS THE RIDGE AXIS MOVES OVER THE UPPER GREAT LAKES WEDNESDAY NIGHT INTO THURSDAY...A SHORTWAVE TROUGH MOVING ALONG THE INTERNATIONAL BORDER WILL CROSS NORTH OF UPPER MI THURSDAY. THERE IS SOME MODEL DISAGREEMENT ON THE STRENGTH OF THE TROUGH...AND THUS HOW EFFECTIVE IT WILL BE IN PICKING UP A SLOW-MOVING CLOSED-LOW OVER THE CENTRAL PLAINS. THE ECMWF IS A BIT STRONGER WITH THE NORTHERN TROUGH AND THUS PICKS UP MOST OF THE ENERGY FROM THE CLOSED-LOW. THE GFS IS WEAKER WITH THE NORTHERN TROUGH AND STRUGGLES TO KICK OUT THE CLOSED-LOW. BOTH SOLUTIONS BRING CHANCES OF PRECIP TO THE CWA...BUT THE ECMWF SHOWS MUCH MORE COVERAGE. GIVEN HOW ANY SUBTLE DIFFERENCES IN THE NORTHERN TROUGH COULD MEAN THE DIFFERENCE BETWEEN PICKING UP THE LOW OR LEAVING IT BEHIND...HAVE OPTED TO CONTINUE CONSENSUS CHANCE POPS FOR WEDNESDAY NIGHT INTO THURSDAY. && .AVIATION...(FOR THE 00Z TAFS THROUGH 00Z SATURDAY EVENING) ISSUED AT 744 PM EDT FRI SEP 19 2014 ALTHOUGH THE GUSTY SW WINDS WL BE DIMINISHING THIS EVNG UNDER A WEAKENING PRES GRADIENT AND WITH LOSS OF DAYTIME HEATING...THE ARRIVAL OF MORE LLVL MSTR WL CAUSE MORE LO CLDS/DETERIORATING CIGS TO IFR AT ALL THE TAF SITES THRU THE NGT. THERE WL BE SOME -SHRA... AND EVEN AN ELEVATED TS IS PSBL...BUT NO SGNFT VSBY RESTRICTIONS ARE LIKELY. THE BEST CHC FOR LIFR CIGS WL BE AT CMX TOWARD SUNRISE AS THE LLVL FLOW VEERS MORE TO AN UPSLOPE W COMPONENT WITH THE ARRIVAL OF A COLD FNT. AS DRY AIR MOVES INTO THE AREA ON SAT BEHIND THE FROPA...CONDITIONS WL IMPROVE TO VFR. && .MARINE...(FOR THE 4 PM LAKE SUPERIOR FORECAST ISSUANCE) ISSUED AT 359 PM EDT FRI SEP 19 2014 AS A STRONG PRESSURE GRADIENT LINGER OVER THE EASTERN HALF OF LAKE SUPERIOR...EXPECT STRONG SOUTHERLY WINDS TO GUST TO 20 TO 30 KNOTS THROUGH THE EVENING HOURS. A FEW GALES TO 35 KNOTS WILL BE POSSIBLE FOR THE HIGHER PLATFORMS AND CLOSER TO THE UPPER MI SHORELINE THROUGH THIS EVENING. THESE GUSTY SOUTH WINDS WILL GRADUALLY DIMINISH ACROSS THE EAST HALF OF THE LAKE OVERNIGHT TONIGHT THROUGH SATURDAY AS THE TROUGH MOVES ACROSS LAKE SUPERIOR. EXPECT A PERIOD OF WESTERLY WINDS OF UP TO 20 KNOTS SATURDAY AFTERNOON AND NW WINDS TO 20 KNOTS SUNDAY BEHIND THIS TROUGH. WINDS WILL REMAIN UNDER 20 KNOTS THROUGH MUCH OF NEXT WEEK AS A SERIES OF HIGH PRESSURE SYSTEMS MOVES OVER THE UPPER GREAT LAKES. IT IS POSSIBLE...HOWEVER...THAT WIND COULD GUST TO 25 KNOTS MONDAY AFTERNOON AS A FAST MOVING TROUGH SWINGS ACROSS LAKE SUPERIOR. && .MQT WATCHES/WARNINGS/ADVISORIES... UPPER MICHIGAN... NONE. LAKE SUPERIOR... NONE. LAKE MICHIGAN... NONE. && SHORT TERM...KEC LONG TERM...KLUBER AVIATION...KC MARINE...KEC
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MARQUETTE MI 344 PM EDT FRI SEP 19 2014 MIZ001>007-009>014-084-085-201200- KEWEENAW-ONTONAGON-NORTHERN HOUGHTON-BARAGA-MARQUETTE-ALGER-LUCE- GOGEBIC-IRON-DICKINSON-MENOMINEE-DELTA-SOUTHERN SCHOOLCRAFT- SOUTHERN HOUGHTON-NORTHERN SCHOOLCRAFT- 344 PM EDT FRI SEP 19 2014 /244 PM CDT FRI SEP 19 2014/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN UPPER MICHIGAN AND CENTRAL UPPER MICHIGAN. .DAY ONE...TONIGHT THUNDERSTORMS ARE POSSIBLE OVER WESTERN AND CENTRAL UPPER MICHIGAN. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THUNDERSTORMS ARE POSSIBLE ACROSS ALL OF WEST AND CENTRAL UPPER MICHIGAN SATURDAY...AND ALONG THE WISCONSIN BORDER SATURDAY NIGHT. SOME STORMS COULD BECOME STRONG ON SATURDAY ACROSS THE EAST HALF OF UPPER MICHIGAN...WITH SMALL HAIL AND GUSTY WINDS POSSIBLE. .SPOTTER INFORMATION STATEMENT... THE NEED FOR WEATHER SPOTTER REPORTS IS NOT ANTICIPATED AT THIS TIME. LSZ162-240>251-263>267-201200- 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- 344 PM EDT FRI SEP 19 2014 /244 PM CDT FRI SEP 19 2014/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN LAKE SUPERIOR...CENTRAL LAKE SUPERIOR AND WESTERN LAKE SUPERIOR. .DAY ONE...TONIGHT THUNDERSTORMS ARE POSSIBLE TONIGHT. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THUNDERSTORMS ARE POSSIBLE SATURDAY. .SPOTTER INFORMATION STATEMENT... THE NEED FOR WEATHER SPOTTER REPORTS IS NOT ANTICIPATED AT THIS TIME. LMZ221-248-250-201200- 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- 344 PM EDT FRI SEP 19 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN LAKE MICHIGAN. .DAY ONE...TONIGHT THUNDERSTORMS ARE POSSIBLE TONIGHT. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THUNDERSTORMS ARE POSSIBLE SATURDAY THROUGH SUNDAY MORNING. .SPOTTER INFORMATION STATEMENT... THE NEED FOR WEATHER SPOTTER REPORTS IS NOT ANTICIPATED AT THIS TIME. KLUBER
The national radar mosaic for the moment the first event began.
2 high wind. Local standard time, as filed.
The GLOS observing site at Grand Marais measured a wind gust at 58 mph.
A tree was knocked down on a pickup truck in the Muskallonge Lake State Park Campground.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Michigan in 2014Every state in 2014This day in weather historyWarnings in Michigan, September 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: 543834, 543835.