Thunderstorms impacted Lake Huron, from the Straits of Mackinac to north of Alpena.
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 APX wrote it up.
Thunderstorms impacted Lake Huron, from the Straits of Mackinac to north of Alpena.
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 19, 2:39 AM EST, 45 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GAYLORD MI 339 AM EDT THU AUG 19 2010 .SYNOPSIS.../ISSUED AT 339 AM/ A COLD FRONT ACROSS UPPER MICHIGAN WILL DROP THROUGH NORTHERN LOWER MICHIGAN TODAY...AND RESULT IN SCATTERED SHOWERS AND A FEW STORMS. THIS FRONT WILL LIFT BACK NORTH AS A WARM FRONT FRIDAY AND FRIDAY NIGHT...BEFORE ANOTHER COLD FRONT PUSHES ACROSS THE REGION SATURDAY. CHANCES FOR SHOWERS AND THUNDERSTORMS WILL EXIST FOR ALL COMMUNITIES DURING THIS TIME. HIGH PRESSURE AND QUIET WEATHER IS ANTICIPATED SUNDAY AND INTO EARLY NEXT WORK WEEK. SMD && .SHORT TERM.../ISSUED AT 339 AM/...TODAY MAIN FOCUS IS ON PRECIP EVOLUTION THRU THE DAY TODAY...AS COLD FRONTAL BOUNDARY GRADUALLY SLIPS SOUTHWARD INTO THE AFTN HOURS. AS EXPECTED THIS TIME YESTERDAY...SAID BOUNDARY...IN CONCERT WITH APPROACHING UPR WAVE...LOW LEVEL JET FORCING...AND MODEST MOISTURE ADVECTION INTO WHAT IS A DECENT LOW LEVEL (925-800MB) FGEN CIRCULATION HAS PROVED MORE THAN SUCCESSFUL TO FIRE OFF WIDESPREAD CONVECTION ACRS THE U.P. THIS MORNING. PER RADAR TRENDS...ACTIVITY TENDING TO SHOW A VERY SLOW DRIFT SOUTHWARD WITH TIME...AND THIS SHOULD CONTINUE THIS MORNING WITH THE PASSAGE OF THE UPR WAVE ACTING TO KICK THE FRONT SOUTHWARD RATHER QUICKLY BY 18Z (NOT TO MENTION RATHER HEALTHY DRY AIR PUSH FROM HIGH PRESSURE BUILDING ACRS ONTARIO/LAKE SUPERIOR). WHILE DEEP LAYER QG UPWARD AND JET FORCING FORCING WANE WITH TIME THRU THE MORNING/EARLY AFTN...DO ANTICIPATE SUFFICIENT COVERAGE INITIALLY (BY SIMPLE MOMENTUM ARGUMENTS) TO MAINTAIN LIKELY POPS ROUGHLY BETWEEN THE STRAITS AND M-72 UP THRU 15Z. THEREAFTER...DIFFICULT TO FORESEE ANYTHING TOO WIDESPREAD GIVEN LOSS OF UPPER HELP AND WANING LOW LEVEL CONVERGENCE AS SFC BOUNDARY STARTS TO WASH OUT. THAT SAID...PENDING SUFFICIENT HEATING ALONG/SOUTH OF THE FRONT...COULD SEE A SMATTERING OF CONVECTION RE-FIRE (OR BECOME REINVIGORATED) 16-17Z ONWARD INTO MID OR LATE AFTN. THUNDER THREAT...THOUGH WANING WITH TIME...IS CERTAINLY THERE THRU THE MORNING WITH MUCAPE VALUES AROUND 800J/KG...WITH POTENTIAL MUCAPES PUSHING 1300 J/KG INTO THE AFTN PENDING DECENT SFC HEATING. CLOUD TRENDS A BIT TRICKY THRU THE DAY...WITH PLENTIFUL LOW/MID LEVEL MOISTURE STUCK IN THE WAKE OF THE BOUNDARY (SEE LATEST SATELLITE PICS THIS MORNING). DO ANTICIPATE A RATHER RAPID IMPROVING TREND FROM NORTH TO SOUTH THRU THE LATE MORNING/AFTN HOURS AS MARKEDLY DRIER AIR INVADES WITH EASTWARD ADVANCE OF LOW LEVEL RIDGING INTO ONTARIO...WITH UPSTREAM SATELLITE PICS YESTERDAY AND PWATS TUMBLING DOWN TO NEAR 0.30 INCHES SUGGESTING FULL SUNSHINE WILL BREAK OUT FROM ROUGHLY M-72 ON NORTH BY 21Z. ALONG THIS SAME LINE...TEMPS A BIT IFFY...ESPECIALLY SOUTHERN HALF OF THE CWA WHERE CLOUDS LINGER THRU AT LEAST EARLY/MID AFTN. WILL TREND NUMBERS DOWN A FEW DEGREES DOWN THAT WAY...AND TREND UP 1-2 DEGREES ACRS THE NORTH UNDER FULL AFTN SUNSHINE/DRY AIR. LAWRENCE && .LONG TERM.../ISSUED AT 339 AM/...TONIGHT AND BEYOND STILL APPEARS A BRIEF RESPITE IS IN THE WORKS TONIGHT AS LOW LEVEL RIDGING BRANCHES DOWN INTO THE NORTHERN GREAT LAKES. SKIES SHOULD INITIALLY START RATHER CLEAR (SAVE FOR PERHAPS SOME LINGERING LOW STUFF DOWN NEAR M-55 ALONG REMNANT BOUNDARY)...BUT WILL PROBABLY SEE AN INCREASE IN CIRRUS 06Z ONWARD ACRS THE NORTH/WEST COUNTIES. OTHERWISE...STILL LOOKS LIKE A CHILLY NIGHT ACRS NORTHERN COUNTIES WHERE MOST PRONOUNCED DRY AIR BLEEDS IN...WHERE READINGS SHOULD DIP INTO THE 40S FOR MANY LOCALES (AWAY FROM THE WATER OF COURSE)... READINGS HOLD UP INTO THE 50S IF NOT NEAR 60 FAR SOUTH VICINITY OF STALLED FRONT. FOCUS THEN QUICKLY SHIFTS TOWARD INCREASING CHANCES FOR RAIN LATER FRIDAY INTO SATURDAY AS NEXT SHORTWAVE EJECTS OUT OF THE CENTRAL PLAINS...WITH WEAK LEE CYCLONE/SFC REFLECTION LIFTING TOWARD WESTERN LAKE SUPERIOR BY FRIDAY NIGHT. MODEST PUSH OF LOW LEVEL THERMAL/ MOISTURE ADVECTION AND ASSOCIATED UPGLIDE SHOULD SUPPORT AN EXPANDING AREA OF SHOWERS WITH EMBEDDED CONVECTION ALONG AND NORTH OF A WARM FRONT (REMNANTS OF TODAY'S FRONTAL BOUNDARY) LIFTING BACK NORTH INTO THE UPR MIDWEST. THIS ACTIVITY SHOULD TEND TO FILL IN DOWN THE BOUNDARY ACRS NORTHERN MICHIGAN LATER FRIDAY NIGHT...HELPED ALONG BY APPROACHING UPR WAVE AND UPTICK IN LOW LEVEL JET FORCING. AS THIS TIME...APPEARS BEST POTENTIAL FOR SEVERE WEATHER WILL OCCUR WELL UPSTREAM ACRS WISCONSIN/IOWA/MISSOURI BENEATH CORE OF MUCH STEEPER LAPSE RATES AND WITHIN PWAT MAXIMUM AXIS...WITH ACTIVITY ACRS NORTHERN MICHIGAN BECOMING MORE ELEVATED WITH TIME. THAT BEING SAID...WILL HAVE TO WATCH DEGREE OF UPSTREAM ORGANIZATION LATE FRIDAY/FRIDAY NIGHT IN ADVANCE OF APPROACHING UPR WAVE...AS DECENT WIND FIELDS EXIST TO PROVIDE ROUGHLY 35 KNOTS DEEP LAYER SHEAR. APPEARS MUCH OF THE ACTIVITY WILL PUSH THRU THE CWA BY MIDDAY SATURDAY...THOUGH WILL MAINTAIN CHANCE POPS ACRS THE EAST FOR SATURDAY AFTN AS SLOWER TIMING OF THE UPR WAVE MAY RESULT IN REDEVELOPMENT. DRY WEATHER LOOKS TO RETURN FOR THE LATTER HALF OF THE WEEKEND AND INTO AT LEAST EARLY NEXT WEEK...COMPLIMENTS OF BUILDING HEIGHTS OVR THE MIDWEST/GREAT LAKES AHEAD OF MODEST TROUGHING SLIDING THRU THE PACIFIC NORTHWEST. STILL SOME POTENTIAL TRICKINESS INVOLVED...AS THE ECMWF CONTINUES TO HANG ONTO A SOLUTION SHOWING UPR RIDGE FOLDING INTO THE REGION BUT IN EFFECT TRAPPING A WEAK CLOSED LOW ACRS THE OHIO VALLEY...SUFFICIENT TO THROW BACK CLOUDINESS INTO MUCH OF THE AREA. THIS CERTAINLY SEEMS TO FIT WITH CLIMO THIS TIME OF YEAR AS WE ARE QUICKLY HEADED TOWARD THE TIME WHEN IT SEEMS IF ANYTHING CAN CURTAIL HEAT UP THIS WAY...IT WILL (CLIMO NUMBERS ARE HEADED DOWN AFTER ALL). PREVIOUS FCST LEANED THIS WAY A BIT AND WILL LET THAT RIDE...WITH MORE OF A PARTLY CLOUD SCENARIO...BUT IF A CLOUDIER REGIME WINS OUT...SUNDAY/MONDAY'S WARMUP MAY WELL BE IN JEOPARDY. JUST SOMETHING TO WATCH. LAWRENCE && .MARINE.../ISSUED AT 339 AM/ A QUICK BURST OF WIND MAY BE IN THE WORKS THIS MORNING AS THE PRESSURE GRADIENT BRIEFLY TIGHTENS IN ADVANCE OF APPROACHING HIGH PRESSURE...THOUGH APPEARS CONDITIONS WILL REMAIN BELOW SMALL CRAFT ADVISORY CRITERIA. WINDS/WAVES WILL BE QUITE LIGHT INTO TONIGHT AS THAT HIGH BUILDS OVERHEAD. APPROACHING LOW PRESSURE INTO FRIDAY AND SATURDAY WILL AGAIN TIGHTEN THE GRADIENT...WITH WINDS SHIFTING SOUTHEAST AND INCREASING THROUGH THE FIRST HALF OF THE WEEKEND. MAY BE LOOKING AT A PERIOD OF SMALL CRAFT ADVISORY CONDITIONS ESPECIALLY FRIDAY NIGHT INTO SATURDAY...BEFORE HIGH PRESSURE RETURNS AGAIN WITH LOW WINDS/WAVES FOR THE LATTER HALF OF THE WEEKEND AND INTO EARLY NEXT WEEK. LAWRENCE && .AVIATION.../ISSUED AT 1127 PM/...VALID FOR 06Z TAFS THE FRONT THAT IS CAUSING THE RAIN SHOWERS AND THUNDERSTORMS IN THE UPPER PENINSULA IS TAKING ITS TIME TO MOVE INTO N LOWER. MVFR CIGS ARE EXPECTED AS THE SHOWERS MOVE INTO THE TAF SITES. IT LOOKS LIKE, THAT THE VSBYS SHOULD REMAIN VFR WHILE THE LINE MOVES THROUGH THE REGION. IT LOOKS LIKE THAT THERE WILL BE SOME CLEARING BEHIND THIS LINE BY EARLY AFTERNOON ON THURSDAY. JSL && .APX WATCHES/WARNINGS/ADVISORIES... MI...NONE. LM...NONE. LH...NONE. LS...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GAYLORD MI 413 AM EDT THU AUG 19 2010 LHZ345>349-LMZ323-341-342-344>346-LSZ321-322-MIZ008-015>036-041-042- 201200- 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- 413 AM EDT THU AUG 19 2010 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...TODAY AND TONIGHT NUMEROUS THUNDERSTORMS WILL CONTINUE NEAR THE STRAITS THROUGH 6 AM. BRIEF WIND GUSTS TO 40 MPH...SMALL HAIL...AND LOCALIZED VERY HEAVY RAINFALL WILL BE POSSIBLE WITH THESE STORMS. SCATTERED THUNDERSTORMS ARE EXPECTED TO ADVANCE ACROSS NORTHERN LOWER MICHIGAN THROUGH MID MORNING...WITH PERHAPS A FEW STORMS REDEVELOPING AFTER 2 PM THIS AFTERNOON SOUTH OF M-72. THESE STORMS ARE NOT EXPECTED TO BECOME SEVERE. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THUNDERSTORMS ARE POSSIBLE AGAIN FRIDAY NIGHT AND INTO SATURDAY. SEVERE THUNDERSTORMS ARE NOT EXPECTED AT THIS TIME...THOUGH LOCALLY HEAVY RAIN IS POSSIBLE. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO RELAY ANY REPORTS OF WEATHER DEEMED SIGNIFICANT...INCLUDING RAINFALL REPORTS. LAWRENCE
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GAYLORD MI 304 AM EDT THU AUG 19 2010 MIZ016-017-190800- CHEBOYGAN-EMMET- 304 AM EDT THU AUG 19 2010 ...LOCALIZED VERY HEAVY RAINFALL NEAR THE STRAITS... AT 300 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A A NEARLY STATIONARY LINE OF THUNDERSTORMS ALONG A LINE EXTENDING FROM 10 MILES WEST OF MACKINAW CITY TO 9 MILES EAST OF MACKINAW CITY...MOVING EAST AT JUST 5 MPH. THESE THUNDERSTORMS WILL MOVE LITTLE THROUGH 400 AM...CONTINUING TO PRODUCE LOCALIZED TORRENTIAL RAINFALL. THE HEAVIEST RAIN WILL BE FOUND ACROSS FAR NORTHERN EMMET COUNTY...TARGETING THE MACKINAW CITY AREA. RAINFALL TOTALS OF 3 TO LOCALLY 4 INCHES ARE EXPECTED...WHICH WILL LEAD TO LOCALIZED FLOODING OF LOW LYING AREAS. LAWRENCE
The NCL Michigan radar (KAPX), 99 km away, was scanning. The volume nearest the first event began at 08:22 UTC.
2 marine thunderstorm wind. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Lake Huron in 2010Every state in 2010This 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: 254880, 254881.