A few strong thunderstorms moved across Lake Michigan into Northwest Lower Michigan. One storm produced some spotty wind damage.
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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 APX wrote it up.
A few strong thunderstorms moved across Lake Michigan into Northwest Lower Michigan. One storm produced some spotty wind damage.
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 Gaylord, MI wrote its last area forecast discussion before the first event at Aug 10, 6:15 PM EST, 2 hours 14 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GAYLORD MI 715 PM EDT MON AUG 10 2009 .SYNOPSIS.../ISSUED AT 352 PM/ ILL DEFINED COLD FRONT WILL SLIDE DOWN THROUGH NORTHERN MICHIGAN TONIGHT PROVIDING A FOCUS FOR SCATTERED SHOWERS AND A FEW THUNDERSTORMS INTO THE EVENING HOURS. HOWEVER...AS THE FRONT CLEARS THE AREA...HIGH PRESSURE AND NOTICEABLY LESS HUMID AIR WILL BUILD ACROSS THE REGION LATE TONIGHT AND TUESDAY. SLIGHTLY COOLER AND LESS HUMID AIR WILL SETTLE INTO THE REGION FOR THE NEXT SEVERAL DAYS. THIS WILL KICK OFF A STRETCH OF RAIN FREE WEATHER THAT WILL LAST THROUGH THE UPCOMING WEEKEND. ADAM && .SHORT TERM.../ISSUED AT 352 PM/...TONIGHT WATCHING A COUPLE BOUNDARIES THIS AFTERNOON. FIRST ONE IS ACROSS EASTERN UPPER MICHIGAN WHERE LAKE BREEZE CONVERGENCE HAS DEVELOPED ACROSS INTERIOR AREAS...LEADING TO AN ENHANCED AREA OF CU ON SATELLITE. WITH A SHORTWAVE ARRIVING FROM THE EAST...CONVECTION HAS BEEN FIRING OFF THIS CONVERGENCE AXIS FROM WEST TO EAST THROUGH THE COURSE OF THE AFTERNOON. THIS TREND WILL CONTINUE OVER THE NEXT SEVERAL HOURS...BEFORE FALLING APART AROUND SUNSET. THE SECOND BOUNDARY IS DRAPED FROM TRAVERSE CITY...EASTWARD TO GRAYLING...AND HARRISVILLE. VERY INTERESTING SETUP THIS AFTERNOON AS WE HAD A BRIEF LAKE BREEZE DEVELOP AT KTVC HELPING TO INTENSIFY RAIN SHOWER ACTIVITY OVER TRAVERSE CITY. HOWEVER...EVEN THIS ACTIVITY IS STARTING TO WANE AND I EXPECT THE BOUNDARY FURTHER EAST TO REMAIN ACTIVE THROUGH THE EVENING HOURS UNTIL WE LOSE THE SOLAR HEATING. THIS BOUNDARY WILL SAG SOUTH AND EAST OUT OF THE AREA BY MID EVENING...LEAVING BEHIND PRECIP CONDITIONS FOR THE OVERNIGHT HOURS. THE NEXT ISSUE IS THE WEAK COOL AIR ADVECTION ONGOING THROUGH THE OVERNIGHT HOURS. MUCH LIKE WHAT HAPPENED ACROSS SOUTHERN ONTARIO LAST NIGHT...WE WILL LIKELY SEE STRATUS QUICKLY EXPAND DURING THE SECOND HALF OF THE NIGHT ENVELOPING MUCH OF THE AREA BY DAYBREAK. THIS IS IN RESPONSE TO MOISTURE BECOMING TRAPPED JUST BELOW THE LOW LEVEL INVERSION. WE MAY EVEN SEE SOME PATCHY FOG DEVELOP WITH DEWPOINTS NOT FALLING OFF ALL THAT QUICKLY NORTH OF THE COLD FRONT. IN FACT...MANY AREAS ARE STILL EXPERIENCING DEWPOINTS IN THE 60S. WITH THE EXPECTED STRATUS FORMATION...OVERNIGHT LOWS WILL REMAIN QUITE MILD IN THE 50S (EASTERN UPPER) AND 60S (NORTHERN LOWER). DESPITE THE PASSAGE OF THE COLD FRONT...WINDS WILL REMAIN VERY WEAK OUT OF THE NORTHWEST. KAS && .LONG TERM.../ISSUED AT 352 PM/...TUESDAY AND BEYOND TUESDAY AND TUESDAY NIGHT...UPPER TROUGH OVER THE ERN GREAT LAKES EARLY TUE WILL CONTINUE TO MOVE E...AS HIGH PRESSURE OVER THE UPPER MS VALLEY AT 12Z MOVES TO LAKE MI BY 00Z. THIS WILL RESULT IN INCREASING SUBSIDENCE AND DRYING DURING THE DAY. UNTIL THAT HAPPENS...MODEL SOUNDINGS SUPPORT RESIDUAL LOW LEVEL MOISTURE AND CLOUDINESS EARLY IN COOL NW FLOW. THIS SEEMS REASONABLE...GIVEN CLOUDS CURRENTLY N OF LAKE SUPERIOR AND THE WEAK CYCLONIC FLOW EXPECTED EARLY. UPSHOT...SKIES WILL START OUT MOSTLY CLOUDY...THEN TREND PARTLY TO MOSTLY SUNNY AS FLOW BECOMES INCREASINGLY ANTI- CYCLONIC. 950 MB FLOW MAY BE JUST WEAK ENOUGH TO ALLOW AFTERNOON LAKE BREEZES TO DEVELOP OVER NE LOWER -- S OF APN. THE ECMWF EVEN SUGGESTS A SHOWER MAY POP IN THIS AREA -- SWD THROUGH THE THUMB. HOWEVER... CLOSER EXAMINATION OF NAM MODEL SOUNDING IN NE LOWER MI SHOWS AN AFTERNOON CAP NEAR 700 MB. THIS WILL LIKELY PRECLUDE ANYTHING MORE THAN SOME CONGESTED CU WITHIN THE AREA OF BEST CONVERGENCE (THOUGH THIS WILL NEED TO BE MONITORED TOMORROW). WITH MORNING CLOUDS AND LOW LEVEL CAA...HAVE LOWERED AFTERNOON HIGHS A TAD. EXPECT HIGHS GENERALLY FROM 70 TO 75 -- THOUGH 75-80 POSSIBLE IN THE FAR SE GIVEN UPSTREAM LOCATION OF THERMAL TROUGH AND EXPECTED DOWNSLOPE FLOW. LOOK FOR MOSTLY CLEAR SKIES TUE NIGHT WITH LOWS OF 50 TO 55. AS USUAL...THE NORMALLY COLDER SPOTS MAY DROP INTO THE UPPER 40S. WEDNESDAY AND THURSDAY...SURFACE HIGH PRESSURE WILL SET UP OVER THE CENTRAL AND EASTERN GREAT LAKES...AS ASSOCIATED 500 MB RIDGE AXIS SLOWLY PUSHES ACROSS THE REGION. EXPECT A GOOD DEAL OF SUN BOTH DAYS...WITH 850 MB TEMPS INTO THE TEENS LIKELY SUPPORTING AFTERNOON HIGHS FROM AROUND 80 TO THE LOWER 80S. FRIDAY THROUGH MONDAY...GFS/ECMWF IN VERY GOOD AGREEMENT...AND SUGGEST THAT BROAD UPPER RIDGE WILL CONTINUE TO IMPACT THE UPPER MS VALLEY AND GREAT LAKES HEADING INTO THE WEEKEND. WITH SURFACE HIGH PRESSURE ANCHORED OVER MID ATLANTIC REGION...WARM SOUTHERLY BREEZES EXPECTED. PATTERN WILL CHANGE LITTLE THROUGH THE PERIOD...AS A WRN U.S. TROUGH DEVELOPS AND ENERGY EJECTING FROM THIS TROUGH PASSES NE TOWARD HUDSON BAY. GFS ENSEMBLE MEMBERS POINT TO A SLIGHTLY FLATTER UPPER RIDGE...WHICH MAY ALLOW WEAK SHORT WAVE ENERGY AND/OR A ROUGE MCS TO IMPACT PARTS OF THE UPPER GREAT LAKES BY LATE IN THE WEEKEND. HAVE NOT REALLY ADOPTED THIS IDEA...AND WILL ONLY INCLUDE A SLIGHT RISK FOR CONVECTION ACROSS ERN UPPER FOR SUN AND MON -- WHICH LINES UP WELL WITH MQT/GRB. OTHERWISE...PARTLY TO MOSTLY SUNNY SKIES EXPECTED FRI-MON WITH HIGHS FROM AROUND 80 TO THE MID 80S. SMITH && .MARINE.../ISSUED AT 352 PM/ WINDS AND WAVES WILL REMAIN BELOW SMALL CRAFT ADVISORY CRITERIA...AS A GENERAL WEST FLOW THIS EVENING BECOMES NW BEHIND A COLD FRONT BY TUE MORNING. LAKE BREEZES MAY FORM SOUTH OF ALPENA TUE AFTERNOON. LITTLE IN THE WAY OF MARINE HAZARDS EXPECTED AT LEAST THROUGH WEDNESDAY...AS LIGHT BREEZES BECOME ONSHORE LAKE BREEZES BY WEDNESDAY AFTERNOON. SMITH && .AVIATION.../ISSUED AT 715 PM/...VALID FOR 00Z TAFS A BKN LINE OF SHOWERS AND EMBEDDED THUNDERSTORMS ALONG A FRONTAL BOUNDARY WILL GRADUALLY SLIDE THRU PORTIONS OF NRN LWR MICHIGAN THIS EVENING...WITH A TENDENCY TO DIMINISH IN BOTH AREAL COVERAGE AND INTENSITY AS DIURNAL INSTABILITY IS LOST WITH SUNSET. WILL INCLUDE IN PLN AND TVC TAF BETWEEN 01Z AND 04Z...BUT WILL LEAVE OUT OF APN TAF FOR NOW AS PRECIP COVERAGE SHOULD BE QUITE LIMITED BY THE TIME THE FRONT REACHES THIS SITE BY LATE EVENING. SLIGHTLY COOLER AIR WILL SLOWLY ADVECT INTO THE AREA OVERNIGHT... EVENTUALLY LEADING TO THE DEVELOPMENT OF IFR/MVFR STRATUS DECK LATE TONIGHT. THIS STRATUS WILL PERSIST INTO TUESDAY...WITH CIGS LIKELY REMAINING MVFR INTO THE AFTERNOON. && .APX WATCHES/WARNINGS/ADVISORIES... MI...NONE. LM...NONE. LH...NONE. LS...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GAYLORD MI 921 PM EDT MON AUG 10 2009 LHZ345>349-LMZ323-341-342-344>346-LSZ321-322-MIZ008-015>036-041-042- 111200- STRAITS OF MACKINAC-ST IGNACE TO FALSE DETOUR CHANNEL- MACKINAC BRDG TO PRESQUE ISLE LT-PRESQUE ISLE LT TO STURGEON PT- STURGEON PT TO ALABASTER-GRAND TRAVERSE BAY- SEUL CHOIX PT TO MACKINAC BRDG-NORWOOD TO MACKINAC BRDG- SLEEPING BEAR PT TO GRAND TRAVERSE LT-PT BETSIE TO SLEEPING BEAR PT- MANISTEE TO PT BETSIE-WHITEFISH BAY-ST. MARYS RIVER-CHIPPEWA- MACKINAC-EMMET-CHEBOYGAN-PRESQUE ISLE-CHARLEVOIX-LEELANAU-ANTRIM- OTSEGO-MONTMORENCY-ALPENA-BENZIE-GRAND TRAVERSE-KALKASKA-CRAWFORD- OSCODA-ALCONA-MANISTEE-WEXFORD-MISSAUKEE-ROSCOMMON-OGEMAW-IOSCO- GLADWIN-ARENAC- 921 PM EDT MON AUG 10 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN LOWER MICHIGAN... EASTERN UPPER MICHIGAN...AND ADJACENT NEARSHORE WATERS OF LAKE MICHIGAN...LAKE HURON AND LAKE SUPERIOR. .DAY ONE...TONIGHT ISOLATED THUNDERSTORMS ARE EXPECTED THROUGH MIDNIGHT ACROSS PORTIONS OF NORTHERN LOWER MICHIGAN...MAINLY ALONG AND SOUTH OF M-72. SEVERE STORMS ARE NOT EXPECTED ACROSS MOST OF THE AREA...BUT A FEW STRONG TO MARGINALLY SEVERE STORMS WILL IMPACT MANISTEE COUNTY THROUGH MIDNIGHT. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THERE IS A SMALL RISK FOR THUNDERSTORMS ACROSS EASTERN UPPER MICHIGAN ON SUNDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED.
The NCL Michigan radar (KAPX), 125 km away, was scanning. The volume nearest the first event began at 01:28 UTC.
1 thunderstorm wind. Local standard time, as filed.
Trees were blown down along Bear Lake, and on Wallaker Road northeast of Bear Lake.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Michigan in 2009Every state in 2009This day in weather historyWarnings in Michigan, August 2009
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: 194704.