An upper level disturbance triggered isolated severe thunderstorms.
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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 DTX wrote it up.
An upper level disturbance triggered isolated severe thunderstorms.
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 Detroit, MI wrote its last area forecast discussion before the first event at Aug 1, 2:21 PM EST, 24 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 321 PM EDT FRI AUG 1 2008 .SHORT TERM... TAMDAR DATA CONTINUES TO SHOW THE DETROIT METRO AREA CAPPED (NOTED INVERSION AT 800 MB)...AS DEW POINTS HAVE FALLEN BACK INTO THE UPPER 50S TO AROUND 60. FARTHER NORTH (NORTH OF I-69)...A FEW CELLS HAVE GONE UP ALONG A SURFACE TROUGH...WHERE THERE IS A POCKET OF MID 60 DEW POINTS. SHORTWAVE TROUGH/COLD POOL ALOFT WILL BE OVERSPREADING SOUTHERN LOWER MICHIGAN THIS EVENING...ALLOWING FOR SOME LARGE SCALE ASCENT AND MID LEVEL COOLING. OBVIOUSLY...WITH 50+ KNOTS AT 500 MB NOSING INTO SOUTHEAST MICHIGAN AND LOWERING FREEZING LEVELS...THERE IS A THREAT OF SEVERE WEATHER. HOWEVER...COVERAGE SHOULD REMAIN LIMITED/ISOLATED WITH THE AVAILABLE LOW LEVEL MOISTURE...AS SURFACE BASED CAPES WILL GENERALLY REMAIN IN THE 1000 TO 2000 J/KG. MID LEVEL COOLING/JET DYNAMICS MAY EVEN ARRIVE A BIT TOO LATE FOR THE SOUTH HALF OF THE CWA TO SEE MUCH ACTIVITY AT ALL AS THE BOUNDARY LAYER BEGINS TO QUICKLY COOL AFT 00Z. IN ANY EVENT...NEED TO RESPECT SUCH STRONG ANOMALY/WIND FIELDS/COLD POOL FOR EARLY AUGUST...AS A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED. ZONES OUT ALREADY. && .LONG TERM...SATURDAY THROUGH NEXT FRIDAY. HIGH PRESSURE WILL KEEP SATURDAY AND SUNDAY DRY WITH NEAR NORMAL TEMPERATURES ACROSS SOUTHEAST MICHIGAN. HIGH PRESSURE WILL THEN MOVE OFF TO THE EAST SUNDAY NIGHT...WITH SOUTHERLY FLOW ACROSS THE REGION MONDAY AND TUESDAY. TEMPERATURES WILL RISE TO WELL ABOVE NORMAL WITH THE SOUTHERLY FLOW...AS TEMPERATURES APPROACH 90 DEGREES ACROSS MUCH OF THE CWA AWAY FROM LAKE HURON. SEVERE WEATHER IS A CONCERN MONDAY AS CAPES BUILD UP TO 1000 J/KG ACROSS THE WESTERN CWA WITH A WEAK LOW THAT MOVES THROUGH THE GREAT LAKES. HOWEVER THE SEVERE WEATHER POTENTIAL APPEARS TO BE LIMITED WITH THE FREEZING LEVEL AROUND 13K FEET AND WINDS OF 30 KNOTS OR LESS BELOW 600 MB. TUESDAY AND TUESDAY NIGHT LOOKS TO BE THE BETTER CHANCE FOR SEVERE WEATHER AS CAPES BUILD TO 3000 J/KG WITH A STRONGER LOW TRACKING THROUGH THE AREA. ALTHOUGH THE WIND FIELD IS WEAK DURING THE DAY...THE WINDS PICK UP TO 50 KNOTS JUST ABOVE 5K FT LATE IN THE AFTERNOON AND INTO THE NIGHTTIME HOURS. WITH PRECIPITABLE WATER VALUES APPROACHING 2 INCHES...HEAVY RAIN AND LOCALIZED FLOODING ARE ALSO POSSIBLE TUESDAY AND TUESDAY NIGHT. THE LOW AND ASSOCIATED PRECIP EXIT THE REGION ON WEDNESDAY...WITH LOWER PRECIP CHANCES. THE LOW WILL BRING COOLER TEMPERATURES TO THE AREA...AS TEMPERATURES RETURN TO AROUND NORMAL. PRECIPITATION CHANCES THURSDAY AND FRIDAY BECOME AN ISSUE AS THE ECMWF/GFS MODELS GENERATE PRECIP WITH SEVERAL WEAK LOWS THAT TRACK THROUGH THE GREAT LAKES. HOWEVER THE GFS ENSEMBLE/CANADIAN MODELS KEEP THE AREA DRY WITH HIGH PRESSURE ACROSS THE AREA. WILL LEAVE THE FORECAST DRY THURSDAY AND FRIDAY GIVEN THE DRY SOLUTIONS PRESENTED BY THE ENSEMBLE MODEL. && .MARINE... MARINE WEATHER CONCERNS WILL BE LIMITED TO A CHANCE OF THUNDERSTORMS THIS EVENING. WINDS WILL REMAIN LIGHT OVER THE NEXT SEVERAL DAYS AS HIGH PRESSURE SLOWLY BUILDS FROM THE MIDWEST INTO LOWER MICHIGAN AND LAKE HURON DURING THE WEEKEND. && .PREV DISCUSSION...ISSUED 1259 PM EDT FRI AUG 1 2008 AVIATION... ILL DEFINED SURFACE COLD FRONT TO SWING THROUGH SOUTHEAST MICHIGAN LATE TODAY/EARLY THIS EVENING...TRIGGERING ISOLATED TO SCATTERED SHOWERS/THUNDERSTORMS. AT THIS TIME...WITH THE LIMITED COVERAGE EXPECTED...WILL LEAVE THE MENTION OF STORMS OUT OF THE MAJORITY OF TAFS (INCLUDED AT MBS HOWEVER). OTHERWISE...THE ONLY OTHER AVIATION CONCERN APPEARS TO BE POSSIBLE FOG LATE TONIGHT. DO THINK THERE WILL BE ENOUGH OF A GRADIENT AND WEAK LOW LEVEL DRY AIR ADVECTION TO PREVENT NOTHING MORE THAN THE PREVIOUS MVFR FOG INCLUDED WITH THE 12Z TAFS. TOMORROW SHOULD SEE DIURNAL SCT CU DEVELOP QUICKLY DURING THE MORNING HOURS...AND COULD BRIEFLY PRODUCE CEILINGS AROUND 3000 FEET BEFORE RISING FURTHER AS BOUNDARY LAYER DEPTH INCREASES. && .DTX WATCHES/WARNINGS/ADVISORIES... MI...NONE. LAKE HURON...NONE. LAKE ST CLAIR...NONE. MI WATERS OF LAKE ERIE...NONE. && SHORT TERM...SF LONG TERM....KURIMSKI MARINE.......SF AVIATION.....SF YOU CAN OBTAIN YOUR LATEST NATIONAL WEATHER SERVICE FORECASTS ONLINE AT WWW.WEATHER.GOV/DETROIT (ALL LOWER CASE).
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 316 PM EDT FRI AUG 1 2008 MIZ047>049-053>055-060>063-068>070-075-076-082-083-021930- MIDLAND-BAY-HURON-SAGINAW-TUSCOLA-SANILAC-SHIAWASSEE-GENESEE-LAPEER- ST. CLAIR-LIVINGSTON-OAKLAND-MACOMB-WASHTENAW-WAYNE-LENAWEE-MONROE- 316 PM EDT FRI AUG 1 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST MICHIGAN. .DAY ONE...THIS AFTERNOON AND TONIGHT A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 900 PM FOR ALL OF SOUTHEAST MICHIGAN. SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON AND EVENING. THESE THUNDERSTORMS MAY BECOME SEVERE...AND PRODUCE DAMAGING WIND GUSTS TO 60 MPH AND HAIL UP TO ONE INCH IN DIAMETER. THUNDERSTORMS WILL TRACK TO THE SOUTHEAST AT 25 TO 30 MPH. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THERE IS A CHANCE OF THUNDERSTORMS MONDAY THROUGH WEDNESDAY AS A FRONTAL BOUNDARY STALLS OVER THE GREAT LAKES. AT THIS TIME THE BEST CHANCE FOR SEVERE WEATHER APPEARS TO BE TUESDAY AND TUESDAY NIGHT. THESE STORMS MAY CONTAIN LARGE HAIL...DAMAGING WINDS AND HEAVY RAINFALL. .SPOTTER INFORMATION STATEMENT...DISPATCHERS...PLEASE NOTIFY YOUR EMERGENCY MANAGERS IMMEDIATELY. SPOTTERS HAVE BEEN ACTIVATED. LCZ422-423-460-LEZ444-LHZ361>363-421-422-441>443-462>464-021930- ST. CLAIR RIVER-DETROIT RIVER-LAKE ST. CLAIR- MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO NORTH CAPE MI- LAKE HURON FROM 5NM EAST OF MACKINAC BRIDGE TO PRESQUE ISLE LT BEYOND 5 NM OFF SHORE- LAKE HURON FROM PRESQUE ISLE LIGHT TO STURGEON POINT MI BEYOND 5NM OFF SHORE- LAKE HURON FROM STURGEON POINT TO ALABASTER MI BEYOND 5NM OFF SHORE- OUTER SAGINAW BAY SW OF ALABASTER TO PORT AUSTIN MI TO INNER SAGINAW BAY-INNER SAGINAW BAY SW OF POINT AU GRES TO BAY PORT MI- PORT AUSTIN TO HARBOR BEACH MI-HARBOR BEACH TO PORT SANILAC MI- PORT SANILAC TO PORT HURON MI- LAKE HURON FROM PORT AUSTIN TO HARBOR BEACH BEYOND 5NM OFF SHORE- LAKE HURON FROM HARBOR BEACH TO PORT SANILAC BEYOND 5NM OFF SHORE- LAKE HURON FROM PORT SANILAC TO PORT HURON BEYOND 5NM OFF SHORE- 316 PM EDT FRI AUG 1 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE ERIE...LAKE HURON AND LAKE ST CLAIR. .DAY ONE...THIS AFTERNOON AND TONIGHT A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 900 PM FOR ALL NEARSHORE WATERS. SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON AND EVENING. THESE THUNDERSTORMS MAY BECOME SEVERE...AND PRODUCE DAMAGING WIND GUSTS TO 55 KNOTS AND HAIL UP TO ONE INCH IN DIAMETER. THUNDERSTORMS WILL TRACK TO THE SOUTHEAST AT 25 KNOTS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THERE IS A CHANCE OF THUNDERSTORMS MONDAY THROUGH WEDNESDAY AS A FRONTAL BOUNDARY STALLS OVER THE GREAT LAKES. AT THIS TIME THE BEST CHANCE FOR SEVERE WEATHER APPEARS TO BE TUESDAY AND TUESDAY NIGHT. THESE STORMS MAY CONTAIN LARGE HAIL...DAMAGING WINDS AND HEAVY RAINFALL. .SPOTTER INFORMATION STATEMENT...DISPATCHERS...PLEASE NOTIFY YOUR EMERGENCY MANAGERS IMMEDIATELY. SPOTTERS HAVE BEEN ACTIVATED. KURIMSKI YOU CAN OBTAIN YOUR LATEST NATIONAL WEATHER SERVICE FORECASTS ONLINE AT WWW.WEATHER.GOV/DETROIT (ALL LOWER CASE).
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 302 PM EDT FRI AUG 1 2008 MIZ054-062-012000- LAPEER-TUSCOLA- 302 PM EDT FRI AUG 1 2008 ...SPECIAL WEATHER STATEMENT... AT 258 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM NEAR REESE...MOVING SOUTHEAST AT 24 MPH. PEA SIZE HAIL...WINDS GREATER THAN 40 MPH...FREQUENT CLOUD TO GROUND LIGHTNING...BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THIS STORM. * THE THUNDERSTORM WILL BE NEAR... VASSAR BY 320 PM EDT... MAYVILLE BY 350 PM EDT... 6 MILES WEST OF CLIFFORD BY 400 PM EDT... GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED. RBP /
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 307 PM EDT FRI AUG 1 2008 MIZ047-048-053-012000- BAY-MIDLAND-SAGINAW- 307 PM EDT FRI AUG 1 2008 ...SPECIAL WEATHER STATEMENT... AT 303 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 6 MILES NORTH OF MIDLAND...MOVING SOUTHEAST AT 24 MPH. PEA SIZE HAIL...WINDS GREATER THAN 40 MPH...FREQUENT CLOUD TO GROUND LIGHTNING...BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THIS STORM. * THE THUNDERSTORM WILL BE NEAR... AUBURN BY 325 PM EDT... KAWKAWLIN BY 335 PM EDT... BAY CITY BY 345 PM EDT... ESSEXVILLE BY 350 PM EDT... MUNGER BY 400 PM EDT... GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED. RBP / HO
The Detroit radar (KDTX), 73 km away, was scanning. The volume nearest the first event began at 19:46 UTC.
2 thunderstorm wind. Local standard time, as filed.
One large tree and numerous branches reported down.
Six trees were reported blown down along Lakeville Road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Michigan in 2008Every state in 2008This day in weather historyWarnings in Michigan, August 2008
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: 129784, 129785.