Strong thunderstorms formed over Saxon Harbor on the afternoon of the 29th producing wind gusts in excess of 40 mph.
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.
Strong thunderstorms formed over Saxon Harbor on the afternoon of the 29th producing wind gusts in excess of 40 mph.
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 Aug 29, 12:49 PM EST, 1 hour 11 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MARQUETTE MI 149 PM EDT THU AUG 29 2013 .SHORT TERM...(TODAY AND TONIGHT) ISSUED AT 428 AM EDT THU AUG 29 2013 LATEST SATELLITE IMAGERY CONTINUES TO SHOW MID/UPPER LEVEL RIDGE OVER THE CENTRAL U.S. WITH A SHORT WAVE RIDING THE RIDGE INTO WESTERN NORTH DAKOTA THIS MORNING. THIS SHORT WAVE CONTINUES TO INITIATE SHOWERS AND THUNDERSTORMS OVER THE NORTHERN PLAINS. OVER UPPER MICHIGAN...WEAK SFC HIGH PRESSURE CONTINUES TO LINGER OVER THE AREA AND WILL HELP KEEP WINDS LIGHT OVER THE REGION THROUGH THE DAY. A WARM AND MOIST AIRMASS REMAINS OVER THE AREA AND AS A RESULT TEMPERATURES WILL ONCE AGAIN WARM TO WELL ABOVE NORMAL READINGS AS 850 MB TEMPS RUNNING AT 18-20C OVER THE AREA. HOWEVER...INCREASING HIGH CLOUDS FROM CONVECTION OVER THE NORTHERN PLAINS WILL HELP MODERATE HIGHS A BIT. APPROACH OF SHORT WAVE WILL BRING AN INCREASING CHANCE FOR CONVECTION OVER THE WESTERN U.P. THIS AFTERNOON. PLENTY OF MOISTURE IS AVAILABLE AND THE AREA WITH DEWPOINTS REMAINING IN THE 60S AND THE AIRMASS WILL BECOME INCREASINGLY UNSTABLE DURING THE DAY WITH SB CAPES CLIMBING INTO THE 2-2.6K J/KG RANGE WHILE LI/S FALL TO -5. HOWEVER...THE MORE UNSTABLE AIR IS EXPECTED TO THE SW OF THE AREA ALONG SFC BOUNDARY. BETTER FORCING ALOFT WILL HOLD OFF UNTIL SHORT WAVE ARRIVES LATER ON...BUT WITH LATEST MODELS BEING SLIGHTLY MORE PROGRESSIVE WITH THIS FEATURE EXPECT SOME SCT SHOWERS AND THUNDERSTORMS TO ARRIVE OVER THE WESTERN U.P. AFTER MID AFTERNOON. WITH WEAK LAKE BREEZE DEVELOPING OVER THE CENTRAL AND EAST THERE MAY BE ENOUGH SFC CONVERGENCE TO INITIATE SHOWERS THERE. WITH LESS INSTABILITY NOTED OVER THE EAST HAVE OPTED NOT TO MENTION THUNDER AT THIS TIME BUT THIS WILL NEED TO BE WATCHED. PRECIPITATION SPREADS IN EARNEST ACROSS THE AREA TONIGHT AS SHORT WAVE MOVES IN. MODELS HAVE TRENDED FURTHER NORTH WITH THE BULK OF THE PRECIPITATION WHERE THE BETTER UPPER LEVEL SUPPORT TO EXIST AND HAVE FOLLOWED THAT TREND. HEAVIEST RAINS EXPECTED DURING THE OVERNIGHT HOURS AS INDICATED BY 850-500 MB Q VECTOR CONVERGENCE. PRECIPITATION SHOULD BE ENDING OVER THE FAR WESTERN SECTION OF LAKE SUPERIOR BY 12Z AS 7H TROUGH AXIS SHIFTS BY. COLD AIR ADVECTION HOLDS OFF UNTIL AFTER 12Z THUS THE AREA WILL EXPERIENCE ANOTHER WARM NIGHT. .LONG TERM...(FRIDAY THROUGH WEDNESDAY) ISSUED AT 428 AM EDT THU AUG 29 2013 FRIDAY THROUGH SATURDAY...A SHORTWAVE SHIFTING AROUND THE NORTHERN FRINGES OF A MASSIVE RIDGE...POSITIONED OVER MUCH OF THE CENTRAL U.S....IS PROGGED TO MOVE FROM THE ARROWHEAD OF MN LATE THURSDAY NIGHT INTO MUCH OF UPPER MI THROUGH THE DAY FRIDAY. THE GFS/EC HAVE SIMILAR SOLUTIONS. THE 00Z/29 NAM HAS SLOWED THE WAVE DOWN BY A FEW HOURS WHICH MATCHES UP A BIT BETTER WITH THE GFS/EC. THE NAM AND GEM TAKE SHORTWAVE FARTHER NORTH AND ALSO TAKE THE SURFACE LOW NORTH OF THE U.P. MU CAPE VALUES OVER MUCH OF UPPER MI/NORTHERN WI WILL DECREASE TO NEAR 500 TO 700 J/KG EARLY FRIDAY MORNING. DEEP LAYER SHEAR VALUES ARE PROGGED TO BE AROUND 25 TO 30 KNOTS LATE THURSDAY NIGHT INTO VERY EARLY FRIDAY MORNING WHICH WOULD ALLOW FOR SOME OF THE STORMS TO BECOME STRONG TO SEVERE. THE DIURNAL LLJ FROM LATE THURSDAY NIGHT WILL WEAKEN TOWARD FRIDAY MORNING...THIS...ALONG WITH DECREASING INSTABILITY WILL ALLOW THE SEVERE THREAT TO DIMINISH BY MID FRIDAY MORNING. THE DECREASED LLJ WILL ALSO HELP TO LIMIT CONVERGENCE AT THE NOSE OF THE JET...DECREASING THE OVERALL FORCING. THIS SHOULD CAUSE AN OVERALL DOWNWARD TREND IN THE OVERALL COVERAGE OF CONVECTION THROUGH FRIDAY MORNING. BY FRIDAY AFTERNOON THE UPPER LEVEL 500MB SHORTWAVE IS PROGGED TO BE OVER MUCH OF THE EASTERN HALF OF THE UPPER PENINSULA AS THE ASSOCIATED SURFACE LOW SHIFTS INTO CENTRAL WI. THIS ALONG WITH A DIURNAL INCREASE IN STABILITY OVER THE CENTRAL PORTIONS OF THE UPPER PENINSULA WILL KEEP THE CHANCE OF SHOWERS AND THUNDERSTORMS IN THE FORECAST...MAINLY FOCUSED OVER THE EASTERN HALF. SHEAR VALUES WILL AGAIN BE AROUND 20 TO 25 KNOTS OVER THESE AREAS...A COUPLE STRONG STORM ARE POSSIBLE FRIDAY AFTERNOON...BUT WIDESPREAD SEVERE WEATHER IS NOT EXPECTED. BY FRIDAY EVENING AND INTO THE DAY SATURDAY...A WEAK SURFACE RIDGE WILL BUILD INTO THE AREA AS THE SHORT WAVE SHIFTS INTO THE LOWER GREAT LAKES. THIS WILL ALLOW FOR CLEARING SKIES AND DRY CONDITIONS TO BUILD INTO THE AREA AS THE NEXT AREA OF LOW PRESSURE BECOMES ORGANIZED OVER SOUTHERN MANITOBA AND SASKATCHEWAN. SATURDAY NIGHT THROUGH MONDAY...THE DEVELOPING SURFACE LOW WILL SHIFT FROM MANITOBA INTO THE UPPER GREAT LAKES REGION. THE GFS/EC HAVE THE LOW OVER WESTERN ONTARIO SATURDAY NIGHT WITH A COLD FRONT TRAILING SOUTHWARD INTO THE CENTRAL PLAINS. AT THE SAME TIME EACH HAVE AN UPPER LEVEL 500 MB TROUGH OVER THE SAME AREA...WITH THE EC MAINTAINING A SLIGHTLY MORE INTENSE TROUGH. SUNDAY INTO SUNDAY NIGHT CONSIDERABLE DIFFERENCES BEGIN TO APPEAR BETWEEN THE EC/GFS AS THE EC INTENSIFIES THE SURFACE LOW AND SHIFTS IT EASTWARD INTO CENTRAL ONTARIO WHILE KEEPING THE MORE INTENSE UPPER LEVEL 500 MB TROUGH OVER MUCH OF THE UPPER PENINSULA. THE 18Z GFS WAS CLOSER TO THE EC...HOWEVER THE 00Z GFS IS SIGNIFICANTLY DIFFERENT FROM THE EC AS WELL AS 18Z RUN OF THE GFS. MORE WEIGHT WILL BE PLACED ON THE EC AS THE MODEL HAS BEEN MORE CONSISTENT FROM RUN TO RUN. THE MORE NORTHERLY TRACK SHOWN BY THE EC WOULD KEEP A MORE NARROW BAND OF SHOWERS AND THUNDERSTORMS OVER THE AREA THROUGH SATURDAY EVENING...MAINLY ALONG AND JUST AHEAD OF THE COLD FRONT PRESSING INTO THE REGION WITH THE MORE WIDESPREAD RAINFALL REMAINING OVER CENTRAL ONTARIO...CLOSER TO THE LOW. BY SUNDAY NIGHT THE LOW SHIFTS INTO WESTERN QUEBEC AS THE COLD FRONT SHIFTS EASTWARD INTO THE LOWER GREAT LAKES TAKING THE CHANCES OF SHOWERS AND THUNDERSTORMS WITH IT. THE UPPER LEVEL 500 MB TROUGH WILL LINGER OVER THE AREA THROUGH THE DAY MONDAY ALLOWING TEMPERATURES TO COOL SIGNIFICANTLY...WITH HIGH TEMPERATURES ONLY REACHING INTO THE LOW 60S...WHICH IS ABOUT 10 DEGREES BELOW NORMAL. MONDAY NIGHT THROUGH WEDNESDAY...THE UPPER LEVEL 500 MB TROUGH WILL CONTINUE TO SHIFT EASTWARD TO THE EASTERN SEABOARD ALLOWING THE HEIGHTS TO RISE OVER MUCH OF THE UPPER GREAT LAKES REGION THROUGH TUESDAY. AT THE SAME TIME A SURFACE RIDGE WILL BUILD INTO THE AREA ALLOWING FOR DRY CONDITIONS AND CLEARING SKIES AS LITTLE MOISTURE LINGERS IN THE 1000-500MB LAYER. SIGNIFICANT MODEL DIFFERENCE APPEAR TUESDAY NIGHT INTO WEDNESDAY AS THE EC INTENSIFIES AN UPPER LEVEL 500 MB LOW OVER CENTRAL CANADA AND SHIFTS IT SOUTHWARD INTO THE MUCH OF THE NORTHEASTERN U.S. WHILE THE GFS KEEPS THE LOW MUCH FARTHER NORTH WITH ONLY SLIGHT TROUGHING OVER THE UPPER GREAT LAKES REGION. IF THE EC IS CORRECT THIS WOULD MEAN MUCH COOLER THAN NORMAL TEMPERATURES FOR THE LAST HALF OF NEXT WEEK. AT THIS POINT WILL STICK WITH A CONSENSUS OF THE MODELS FOR TUESDAY NIGHT INTO WEDNESDAY. && .AVIATION...(FOR THE 18Z TAFS THROUGH 18Z FRIDAY AFTERNOON) ISSUED AT 142 PM EDT THU AUG 29 2013 UNCERTAINTY IN TIMING SHOWERS AND THUNDERSTORMS MAKES FOR A LOWER CONFIDENCE FORECAST. CONFIDENCE IS HIGH THAT A CLUSTER OF SHOWERS AND THUNDERSTORMS WILL MOVE ACROSS IWD LATE THIS AFTERNOON/EARLY THIS EVENING. CONFIDENCE IS ALSO HIGH THAT ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS WILL MOVE THROUGH TONIGHT INTO EARLY FRIDAY SOMEWHERE ACROSS THE REGION...BUT EXACTLY WHERE AND WHEN THOSE MOVE THROUGH IS QUITE UNCERTAIN. ALONG WITH THAT UNCERTAINTY WITH THE CONVECTION...CIG/VIS IS ALSO UNCERTAIN. SHORTER TERM PART OF THE FORECAST IS PROBABLY PRETTY RELIABLE THIS PERIOD...BUT LATER THIS EVENING INTO TONIGHT...PREDICTABILITY IS MUCH LOWER. && .MARINE...(FOR THE 4 AM LAKE SUPERIOR FORECAST ISSUANCE) ISSUED AT 428 AM EDT THU AUG 29 2013 PATCHY FOG WILL PERSIST THROUGH TODAY AS RELATIVELY HIGH DEWPOINTS AND TEMPERATURE INVERSION REMAIN IN PLACE OVER LAKE SUPERIOR. COOLER AND DRIER AIR WILL BEGIN MOVING INTO THE AREA FOR THE WEEKEND...THIS WILL BREAK DOWN THE TEMPERATURE INVERSION...ALLOWING THE FOG TO FINALLY DISSIPATE. LIGHT WINDS...LESS THAN 15 KNOTS...WILL PREVAIL THROUGH MUCH OF THE FORECAST PERIOD AS THE PRESSURE GRADIENT REMAINS LIGHT UNDER THE INFLUENCE OF RIDGING ALOFT. THE PRESSURE GRADIENT WILL TIGHTEN SUNDAY NIGHT WITH THE PASSAGE OF A COLD FRONT AND ASSOCIATED AREA OF LOW PRESSURE THAT WILL PASS JUST TO THE NORTH OF LAKE SUPERIOR. BEHIND THE COLD FRONT...NORTHWEST WINDS ARE EXPECTED TO INCREASE INTO THE 15 TO 25 KNOT RANGE SUNDAY NIGHT THROUGH MONDAY. && .MQT WATCHES/WARNINGS/ADVISORIES... UPPER MICHIGAN... NONE. LAKE SUPERIOR... NONE. LAKE MICHIGAN... NONE. && SHORT TERM...RJT LONG TERM...KEC AVIATION...TITUS MARINE...KEC
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MARQUETTE MI 500 AM EDT THU AUG 29 2013 MIZ001>007-009>014-084-085-301200- KEWEENAW-ONTONAGON-NORTHERN HOUGHTON-BARAGA-MARQUETTE-ALGER-LUCE- GOGEBIC-IRON-DICKINSON-MENOMINEE-DELTA-SOUTHERN SCHOOLCRAFT- SOUTHERN HOUGHTON-NORTHERN SCHOOLCRAFT- 500 AM EDT THU AUG 29 2013 /400 AM CDT THU AUG 29 2013/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN UPPER MICHIGAN AND CENTRAL UPPER MICHIGAN. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS WILL BE POSSIBLE LATE THIS AFTERNOON OVER FAR WESTERN UPPER MICHIGAN. EXPECT THUNDERSTORMS TO CONTINUE ACROSS THE ENTIRE AREA TONIGHT. SOME STORMS MAY BE STRONG AND PRODUCE GUSTY WINDS...SMALL HAIL AND HEAVY RAINFALL. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THUNDERSTORMS WILL DIMINISH FROM WEST TO EAST THROUGH THE DAY FRIDAY. THERE IS A SLIGHT CHANCE OF THUNDERSTORMS SATURDAY THROUGH SUNDAY. .SPOTTER INFORMATION STATEMENT... THE NEED FOR WEATHER SPOTTER REPORTS IS NOT ANTICIPATED AT THIS TIME. LSZ162-240>251-263>267-301200- 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- 500 AM EDT THU AUG 29 2013 /400 AM CDT THU AUG 29 2013/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN LAKE SUPERIOR...CENTRAL LAKE SUPERIOR AND WESTERN LAKE SUPERIOR. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS WILL BE POSSIBLE LATE THIS AFTERNOON OVER WESTERN LAKE SUPERIOR. EXPECT THUNDERSTORMS TO CONTINUE ACROSS THE ENTIRE AREA TONIGHT. SOME STORMS MAY BE STRONG AND PRODUCE GUSTY WINDS...SMALL HAIL AND HEAVY RAINFALL. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THUNDERSTORMS WILL DIMINISH THROUGH FRIDAY AFTERNOON. ANOTHER ROUND OF THUNDERSTORMS WILL BE POSSIBLE SATURDAY AFTERNOON THROUGH SUNDAY. .SPOTTER INFORMATION STATEMENT... THE NEED FOR WEATHER SPOTTER REPORTS IS NOT ANTICIPATED AT THIS TIME. LMZ221-248-250-301200- 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- 500 AM EDT THU AUG 29 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN LAKE MICHIGAN. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS WILL BE POSSIBLE TONIGHT. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THUNDERSTORMS WILL DIMINISH THROUGH FRIDAY EVENING. THUNDERSTORMS WILL ALSO BE POSSIBLE SUNDAY. .SPOTTER INFORMATION STATEMENT... THE NEED FOR WEATHER SPOTTER REPORTS IS NOT ANTICIPATED AT THIS TIME. KEC
The Duluth radar (KDLH), 139 km away, was scanning. The volume nearest the first event began at 19:00 UTC.
1 marine thunderstorm wind. Local standard time, as filed.
Wind gusts at the Saxon Harbor GLOS measured between 40 and 46 mph during the period.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Lake Superior in 2013Every state in 2013This day in weather history
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: 467271.