Strong west to northwest winds in the wake of a cold front gusted near 60 mph over portions of the Keweenaw Peninsula on the afternoon of the 24th.
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The episode as NWS MQT wrote it up.
Strong west to northwest winds in the wake of a cold front gusted near 60 mph over portions of the Keweenaw Peninsula on the afternoon of the 24th.
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 24, 12:54 PM EST, 6 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MARQUETTE MI
154 PM EDT WED AUG 24 2011
UPDATED AVIATION DISCUSSION FOR 18Z TAFS
.DISCUSSION...
COLD FRONT ASSOCIATED WITH CLEARLY AMPLIFYING SHORTWAVE PER WV
IMAGERY IS CURRENTLY PUSHING THROUGH THE ARROWHEAD OF MN. WHILE THE
BEST DYNAMICS WILL REMAIN NORTH OF LAKE SUPERIOR AND AIRMASS IS
DRYING ACROSS THE AREA STILL CANNOT COMPLETELY RULE OUT A SHRA/TSRA
AHEAD OF THE FRONT GIVEN THE SHARPNESS OF THE FRONT. BETTER CHANCES
WILL BE OVER THE FAR EAST LATER THIS MORNING WHERE SOME DAYTIME
HEATING COULD OCCUR PRIOR TO ITS PASSAGE.
OTHERWISE...WINDS WILL BE ON THE INCREASE TODAY WITH TIGHTENING
GRADIENT AND DEEPENING LOW NORTH OF LAKE SUPERIOR. FIRST SURGE OF
STRONGER WINDS WILL OCCUR JUST BEHIND THE FRONTAL PASSAGE WITH
PRESSURE RISES MAXIMIZED OVER LAKE SUPERIOR AND THE KEWEENAW
PENINSULA. WITH A FAVORABLE WESTERLY WIND DIRECTION HIGHER TERRAIN
AREAS OF THE KEWEENAW PENINSULA COULD SEE WINDS GUST TO 40 KTS. THUS
WILL HOIST A WIND ADVISORY FOR HOUGHTON AND KEWEENAW COUNTIES
THROUGH THE AFTERNOON. EXPECT BREEZY CONDITIONS ELSEWHERE TODAY.
WITH SYSTEM A LITTLE DEEPER EXPECT IT TO BE STRONG ENOUGH TO WRAP
MOISTURE BACK INTO THE REGION IN THE WRAPAROUND AREA ON THE BACK
SIDE OF THE LOW THIS AFTERNOON AND EVENING. THIS SHOULD ACT TO LIMIT
HOW FAR RHS CAN FALL OFF THIS AFTERNOON WITH THE LOWEST RHS
BETWEEN 25 AND 30 PERCENT CONFINED TO NEAR THE WI BORDER. MOISTURE
RETURN SHOULD BE DEEP ENOUGH THIS AFTERNOON TO EVEN PRODUCE SOME
LIGHT SHOWERS AND SPRINKLES. SINCE FULL SUN IS NOT EXPECTED AND LOW
LEVEL AIRMASS WILL NOT BE AS DRY AS IT WAS LOOKING A FEW DAYS AGO
WILL JUST MAINTAIN THE ONGOING WILDFIRE POTENTIAL STATEMENT.
LOW CONTINUES TO MOVE EAST TONIGHT AS HIGH PRESSURE BUILDS INTO THE
AREA. SKIES WILL CLEAR FROM WEST TO EAST DURING THE NIGHT AND WINDS
WILL BEGIN TO DIMINISH ESPECIALLY OVER THE INTERIOR WEST. RIDGE AXIS
WILL BE RIGHT OVER THE AREA ON THURSDAY WITH A TRANQUIL DAY
EXPECTED. NEXT SHORTWAVE AND FRONT WILL CROSS THE AREA ON FRIDAY.
OVERALL MOISTURE RETURN WILL BE LIMITED AND ONLY EXPECT SCATTERED
SHRAS/TSRAS AHEAD OF IT AT BEST.
&&
.AVIATION /FOR THE 18Z TAF ISSUANCE/...
A COLD FRONT HAS PASSED BOTH TAF SITES...LEADING TO GUSTY WNW WINDS
OF 25-35KTS. EXPECT THE STRONGEST WINDS TO CONTINUE AT KCMX /UP TO
40KTS/...AS IT IS CLOSER TO THE SFC LOW AND TIGHTER PRESSURE
GRADIENT OVER ONTARIO. CLOUDS WRAPPING AROUND THE LOW ARE HEADING
INTO CMX AT TAF TIME AND SHOULD LEAD TO VFR CONDITIONS AND SCATTERED
SHOWERS THROUGH THE AFTERNOON. THESE CLOUDS WILL CONTINUE TO SLIDE
OVER BOTH SITES THROUGH THE EVENING WHILE LOWERING...WHICH SHOULD
LEAD TO MVFR CIGS AT CMX AND BRIEF MVFR CIGS AT SAW. HIGH PRESSURE
WILL MOVE OVER UPPER MI LATE TONIGHT AND THURS...LEADING TO
DECREASING WINDS AND VFR CONDITIONS.
&&
.MARINE /FOR THE 4 AM LAKE SUPERIOR FORECAST ISSUANCE/...
DEEP LOW PRES MOVING SLOWLY ACROSS NORTHERN ONTARIO WILL BRING
POTENTIAL FOR GALES OVER PORTIONS OF LK SUPERIOR THROUGH TONIGHT.
SOUTH WINDS SHIFT WEST THIS MORNING AND PRESSURE RISE TRACKING
ACROSS SOUTHERN SECTIONS OF LS MAY BE ENOUGH TO LEAD TO BRIEF GALE
GUSTS. MAY SEE WINDS RELAX SOME INTO THE AFTN...THEN EXPECT SECOND
BURST OF WINDS TONIGHT AS COOLER AIR/STRONG WINDS ALOFT MOVE THROUGH.
KEPT GALE WATCH UP FOR TONIGHT FOR GALE POTENTIAL. WINDS WILL
SUBSIDE FROM W TO E LATE WED NIGHT INTO THU WITH SPEEDS UNDER 20KT
BY THU EVENING AS HIGH PRES ARRIVES OVER THE AREA. SW TO S WINDS
WILL THEN BE ON THE INCREASE AGAIN THU NIGHT/FRI...REACHING
15-25KT...AS THE NEXT LOW PRES SYSTEM MOVES E INTO FAR NRN ONTARIO.
WINDS WILL THEN SLOWLY DIMINISH FROM W TO E SAT. WINDS SHOULD BE
LIGHT SUN...UNDER 15KT...AS HIGH PRES SETTLES OVER THE UPPER GREAT
LAKES.
&&
.MQT WATCHES/WARNINGS/ADVISORIES...
UPPER MICHIGAN...
WIND ADVISORY UNTIL 7 PM EDT THIS EVENING FOR MIZ001-003.
LAKE SUPERIOR...
GALE WATCH FROM 10 PM EDT THIS EVENING THROUGH THURSDAY MORNING
FOR LSZ267.
GALE WATCH FROM 8 PM EDT THIS EVENING THROUGH THURSDAY MORNING
FOR LSZ249>251-264-266.
GALE WARNING FROM 5 PM THIS AFTERNOON TO 8 PM EDT THIS EVENING
FOR LSZ264-266.
LAKE MICHIGAN...
GALE WATCH FROM 8 PM EDT THIS EVENING THROUGH THURSDAY MORNING
FOR LMZ250.
&&
DISCUSSION...MZ
AVIATION...SRF
MARINE...JLAHAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MARQUETTE MI 538 AM EDT WED AUG 24 2011 MIZ001>007-009>014-084-085-251200- KEWEENAW-ONTONAGON-NORTHERN HOUGHTON-BARAGA-MARQUETTE-ALGER-LUCE- GOGEBIC-IRON-DICKINSON-MENOMINEE-DELTA-SOUTHERN SCHOOLCRAFT- SOUTHERN HOUGHTON-NORTHERN SCHOOLCRAFT- 538 AM EDT WED AUG 24 2011 /438 AM CDT WED AUG 24 2011/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN UPPER MICHIGAN AND CENTRAL UPPER MICHIGAN. .DAY ONE...TODAY AND TONIGHT BREEZY TO WINDY CONDITIONS WILL EXIST ACROSS THE AREA TODAY. WINDS MAY GUST UP TO 45 MPH...ESPECIALLY ACROSS THE KEWEENAW PENINSULA. THERE IS A MODERATE RISK OF RIP CURRENTS ALONG THE ALGER COUNTY BEACHES THIS EVENING. EXPECT AN ELEVATED RISK OF WILDFIRES THIS AFTERNOON...PARTICULARLY OVER THE WESTERN HALF OF UPPER MICHIGAN AND LOCATIONS ALONG LAKE SUPERIOR THAT HAVE RECEIVED VERY LITTLE RAIN OVER THE PAST COUPLE OF WEEKS. SEE THE LATEST WILDFIRE POTENTIAL STATEMENT FOR ADDITIONAL DETAILS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY THUNDERSTORMS ARE POSSIBLE FRIDAY AND THEN AGAIN MONDAY. .SPOTTER INFORMATION STATEMENT... THE NEED FOR WEATHER SPOTTER REPORTS IS NOT ANTICIPATED AT THIS TIME. LSZ162-240>251-263>267-251200- 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- 538 AM EDT WED AUG 24 2011 /438 AM CDT WED AUG 24 2011/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN LAKE SUPERIOR...CENTRAL LAKE SUPERIOR AND WESTERN LAKE SUPERIOR. .DAY ONE...TODAY AND TONIGHT THERE IS A CHANCE OF THUNDERSTORMS OVER CENTRAL AND EASTERN LAKE SUPERIOR THIS MORNING. GALE FORCE WINDS ARE POSSIBLE LATE THIS AFTERNOON AND EVENING OVER PORTIONS OF LAKE SUPERIOR. A GALE WATCH IS IN EFFECT. SEE THE LATEST MARINE WEATHER MESSAGE FOR MORE DETAILS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY THUNDERSTORMS ARE POSSIBLE ON FRIDAY AND OVER WESTERN LAKE SUPERIOR ON SUNDAY NIGHT. .SPOTTER INFORMATION STATEMENT... THE NEED FOR WEATHER SPOTTER REPORTS IS NOT ANTICIPATED AT THIS TIME. LMZ221-248-250-251200- 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- 538 AM EDT WED AUG 24 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN LAKE MICHIGAN. .DAY ONE...TODAY AND TONIGHT GALE FORCE WINDS ARE POSSIBLE LATE THIS EVENING OVER PORTIONS OF NORTHERN LAKE MICHIGAN. A GALE WATCH IS IN EFFECT. SEE THE LATEST MARINE WEATHER MESSAGE FOR MORE DETAILS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... THE NEED FOR WEATHER SPOTTER REPORTS IS NOT ANTICIPATED AT THIS TIME.
The national radar mosaic for the moment the first event began.
1 high wind. Local standard time, as filed.
Peak wind gust measured at the Michigan Tech University Keweenaw Research Center.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Michigan in 2011Every state in 2011This day in weather historyWarnings in Michigan, August 2011
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: 342556.