An isolated several thunderstorm developed during the evening hours.
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 DTX wrote it up.
An isolated several thunderstorm developed during the evening hours.
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 Jun 24, 6:51 PM EST, 1 hour 4 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 751 PM EDT WED JUN 24 2009 .UPDATE... PASSAGE OF LAKE BREEZE THROUGH MUCH OF HEAT ADVISORY AREA HAS EDGE TEMPERATURES BACK INTO THE MID 80S AND EVEN AREAS FURTHER WEST ARE BACK INTO THE UPPER 80S. HEAT INDICES ARE IN THE LOWER 90S WITH RELATIVE HUMIDITY BETWEEN 40-50%. CONDITIONS WILL IMPROVE FURTHER THIS EVENING...SO PLAN ON CANCELLING ADVISORY. WILL ALSO INCREASE THE COVERAGE OF SHOWERS/THUNDERSTORMS OVER THE SAGINAW VALLEY/SAGINAW BAY AS CONVECTION THAT FORMED LATE IN THE AFTERNOON OVER NORTHERN LOWER CONTINUES TO CHUG ALONG AS MODEST INSTABILITY REMAINS IN PLACE. DO NOT EXPECT SEVERE WEATHER...BUT LOCALLY HEAVY RAINFALL AND GUSTY WINDS FROM CELL MERGERS AND/OR COLLAPSES ARE CERTAINLY POSSIBLE. && .PREV DISCUSSION...ISSUED 725 PM EDT WED JUN 24 2009 AVIATION... LAKE BREEZE LIES BETWEEN DET/DTW AND IS NEARING PTK. ALTHOUGH SOME TOWERING CU HAS BEEN NOTED ON THIS BOUNDARY...TRENDS SUGGEST THAT THE AREA REMAINS CAPPED ENOUGH TO HOLD BACK CONVECTION...THUS WILL NOT INCLUDE ANY MENTION OF SHOWERS/THUNDER IN THE FIRST PART OF THE FORECAST. SEVERAL THUNDERSTORMS THAT FORMED OVER NORTHERN LOWER ARE FAIRING A BIT BETTER AND ARE ORGANIZED ENOUGH TO PERHAPS MAINTAIN SOME FORM DURING THE FIRST HOUR OR TWO OF THE FORECAST PERIOD. WILL LEAVE OUT OF MBS ATTM...BUT MONITOR CLOSELY. SHORTWAVE TROUGH WILL PROGRESS THROUGH THE AREA ON THURSDAY...AND BRING A BETTER CHANCE OF SHOWERS/THUNDERSTORMS DURING THE MIDDAY INTO LATE AFTERNOON PERIOD. TIMING WILL BE DIFFICULT...AND WILL DEPEND GREATLY ON HOW OVERNIGHT CONVECTION TO THE WEST BEHAVES ONCE IT REACHES LAKE MICHIGAN/MICHIGAN. WILL MAKE AN ATTEMPT TO TIME A FEW HOURS WHEN FROPA/CONVECTION IS MOST LIKELY AT EACH SITE...BUT SUSPECT ADJUSTMENTS WILL BE NECESSARY BASED ON ACTIVITY TONIGHT. PREV DISCUSSION...ISSUED 332 PM EDT WED JUN 24 2009 SHORT TERM...TODAY AND TONIGHT THE HEAT AND HUMIDITY REMAIN THE BIG STORY TODAY. IN FACT IT APPEARS THAT THE DEWPOINTS HAVE STAYED HIGH ENOUGH TO PREVENT A COUPLE DEGREES OF DAYTIME HEATING. WE MAY NOT QUITE REACH OUR 94 AT METRO...BUT IT WILL STILL FEEL LIKE HEAT INDICES NEAR 98 DEGREES. ALSO...STILL FEEL THAT THE HEAT INDEX ADVISORY WAS WARRANTED WITH SUCH EXTREME HEAT...AND BEING THE FIRST HIGH HEAT EVENT OF THE SEASON. WE HAVE BEEN ABLE TO ADVECT 850MB TEMPS UP TO ABOUT +20C. OUR 12Z SOUNDING DID COME IN QUITE MOIST AT LOW LEVELS WHICH EXPLAINS THE HIGH DEWPOINTS. WE ARE STILL QUITE CAPPED OVER SE MI DUE TO THE RIDGE AXIS BEING STATIONED OVER THE REGION. THERE IS AMPLE MOISTURE AND INSTABILITY...REALLY JUST A LACK OF ANY FORCING MECHANISM TO GET THINGS GOING. STILL A CHANCE FOR LAKE BREEZE INTERACTIONS THIS AFTERNOON...AND AN ISO TSTORM IS NOT OUT OF THE QUESTION. THIS IS ESPECIALLY TRUE ALONG THE SHORES OF LAKE HURON AND LAKE ST CLAIR. TONIGHT WILL BE WARM AND MUGGY AGAIN WITH LITTLE TIME TO RECOVER FROM THE HEAT OVERNIGHT. A WEAK COLD FRONT IS FORECAST TO DROP INTO THE NORTHERN PORTIONS OF THE FORECAST AREA LATE TONIGHT. CONDITIONS WILL ALSO BE FAVORABLE FOR MCS DEVELOPMENT ACROSS THE UPPER MIDWEST. THERE WILL STILL BE AROUND 1200+ J/KG OF CAPE AVAILABLE OVERNIGHT TO TAP INTO AND WILL KEEP CHANCE POPS IN THE FORECAST FOR TONIGHT. LONG TERM... TWO STRONG COLD FRONTS STILL GENERALLY ON TRACK FOR TOMORROW AND SATURDAY NIGHT...ALTHOUGH THE ONE OVER THE WEEKEND LOOKS TO BE DELAYED JUST A BIT...CLOSER TO 12Z SUNDAY. STRONG SHORTWAVE/TROUGH ALONG THE ALBERTA/SASKATCHEWAN BORDER WILL BE SWINGING THROUGH THE NORTHERN GREAT LAKES TOMORROW...WITH INCREASING 0-6 KM BULK SHEAR SPREADING OVER SOUTHERN LOWER MICHIGAN...REACHING 25 TO 40 KNOTS BY AFTERNOON (HIGHEST VALUES NORTH)...AS 50-60 KNOT JET AT 500 MB NOSES INTO THE REGION. SURFACE COLD FRONT LOOKS TO BE COMING THROUGH DURING PEAK HEATING...CLEARING CWA AT OR JUST AFTER 00Z. ASSUMING THERE IS NOT A LOT OF SHOWER/THUNDERSTORM ACTIVITY DURING THE MORNING HOURS FROM POSSIBLE OVERNIGHT MCS...ANOTHER REASONABLE CHANCE DETROIT AND AREAS SOUTH WILL REACH 90 DEGREES...BASED ON POCKET OF 20 C AIR AT 850 MB. WITH SURFACE DEW POINTS IN THE LOWER 70S EXPECTED (NOT MID 70 ADVERTISED BY GFS)...LOOKING AT MLCAPES OF 1500-2000 J/KG...WHICH WOULD BE ADEQUATE TO PRODUCE A FEW SEVERE STORMS WITH THE INCREASING WIND FIELDS. FREEZING LEVELS AND WET BULB ZERO HEIGHTS START OUT A BIT HIGH DURING THURSDAY...ABOVE 13000 FEET AND ABOVE 10000 FEET RESPECTIVELY...BUT SOME COOLING SHOULD OCCUR LATE IN THE DAY ACROSS THE NORTH. HOWEVER...THE MAIN MID LEVEL COLD POOL IS EXPECTED TO REMAIN NORTH...AS 500 MB TEMPERATURES ARE ACTUALLY FORECASTED TO HOLD NEARLY STEADY. BOTTOM LINE...A SLIGHT CHANCE FOR SEVERE STORMS REMAINS...WITH SHOWERS AND THUNDERSTORMS LIKELY WITH ADEQUATE LOW LEVEL CONVERGENCE/INSTABILITY/PLENTY OF MOISTURE (PW VALUES UP TO 2 INCHES) AVAILABLE AND LARGE SCALE ASCENT AHEAD OF IMPINGING UPPER WAVE TO THE NORTH. DRY NORTHWEST CONFLUENT FLOW FOLLOWS FOR FRIDAY...WITH BUILDING SURFACE HIGH PRESSURE PROVIDING A SEASONABLY WARM DAY (MID 80S) WITH PLENTY OF INSOLATION. ANOTHER WARM DAY (UPPER 80S) WITH GOOD DEAL OF SUNSHINE FOR SATURDAY...AS UPPER LEVEL RIDGE CRESTS OVER THE AREA AROUND 00Z. SHOULD ESCAPE THE DAY DRY...BUT WENT WITH A SLIGHT CHANCE ACROSS THE TRI-CITIES REGION LATE IN THE DAY WITH LEAD MOISTURE SURGE. THE 12Z EUROPEAN YESTERDAY WAS FIRST TO LATCH ONTO THE SLOWER FROPA OVER THE WEEKEND (AROUND 12Z SUNDAY)...AND GFS AND CANADIAN GLOBAL HAVE NOW LATCHED ON...AND HAVE INCLUDED CHANCE POPS INTO SUNDAY MORNING AFTER UPPING SATURDAY NIGHT TO SCATTERED 50 POP. THE UPPER LEVEL RIDGE WILL QUICKLY BE ERODING...AS UPSTREAM TROUGH MERGES WITH THE CUTOFF LOW OVER NEW ENGLAND EARLY NEXT WEEK...LEADING TO A LARGE AND DEEP UPPER LEVEL LOW CENTERED OVER THE CENTRAL/EASTERN GREAT LAKES. THE 12Z OPERATIONAL GFS IS MUCH FARTHER WEST AND WILL BE DISREGARDED...AS MAJORITY OF ENSEMBLE MEMBERS (INCLUDING EUROPEAN MEMBERS) DISAGREE. IN ANY EVENT...EXPECTING BELOW NORMAL TEMPERATURES (3-6 DEGREES)...AND WILL NEED TO BE LEARY OF POSSIBLE SHOWERS AS SPOKES OF ENERGY ROTATE AROUND THE LARGE CIRCULATION. WITH LITTLE FAITH IN TIMING OF THESE SMALL FEATURES...AND STILL SOME UNCERTAINTY WITH THE EXACT LOCATION OF THE CIRCULATION/COLD POOL...HAVE CHOSEN TO CARRY JUST ISOLATED SHOWERS ON MONDAY AND TUESDAY FOR NOW. MARINE... LINGERING HIGH PRESSURE OVER THE EASTERN GREAT LAKES WILL CONTINUE TO PROVIDE LIGHT WINDS ACROSS THE MARINE AREAS TODAY. A COLD FRONT WILL DROP SOUTH ACROSS THE REGION TONIGHT AND THURSDAY...PROVIDING THE CHANCE FOR THUNDERSTORMS. WEAK HIGH PRESSURE WILL THEN BUILD INTO THE REGION BY FRIDAY. THE NEXT CHANCE FOR THUNDERSTORMS WILL BE WITH ANOTHER COLD FRONT FORECAST TO PASS THROUGH THE REGION SUNDAY. && .DTX WATCHES/WARNINGS/ADVISORIES... MI...NONE. LAKE HURON...NONE. LAKE ST CLAIR...NONE. MI WATERS OF LAKE ERIE...NONE. && UPDATE.......DG AVIATION.....DG SHORT TERM...MM LONG TERM....SF MARINE.......MM 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 810 PM EDT WED JUN 24 2009 MIZ047>049-053>055-060>063-068>070-075-076-082-083-250830- MIDLAND-BAY-HURON-SAGINAW-TUSCOLA-SANILAC-SHIAWASSEE-GENESEE-LAPEER- ST. CLAIR-LIVINGSTON-OAKLAND-MACOMB-WASHTENAW-WAYNE-LENAWEE-MONROE- 810 PM EDT WED JUN 24 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST MICHIGAN. .DAY ONE...THIS EVENING AND TONIGHT HEAT INDICES WILL REMAIN IN THE LOW 90S THIS EVENING...BEFORE EDGING DOWN OVERNIGHT. ISOLATED THUNDERSTORMS ARE EXPECTED LATE THIS EVENING WITH THE BEST COVERAGE OVER THE SAGINAW VALLEY. THESE STORMS ARE NOT EXPECTED TO BE SEVERE. THE STRONGEST STORMS...WHICH WILL BE CONFINED TO THE SAGINAW VALLEY...WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 50 MPH AND LOCALLY HEAVY RAINFALL AS THEY MOVE SOUTHEAST AT 20 MPH. THE HOT AND HUMID AIRMASS OVER THE REGION WILL HELP TRIGGER THESE ISOLATED THUNDERSTORMS. A WEAK COLD FRONT WILL SETTLE INTO THE AREA LATE TONIGHT...WHICH WILL TRIGGER MORE SCATTERED THUNDERSTORM DEVELOPMENT AFTER MIDNIGHT. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY THUNDERSTORMS ARE LIKELY ON THURSDAY. THERE IS A SLIGHT CHANCE OF SEVERE WEATHER WITH THESE STORMS. A SLOW MOVING COLD FRONT AND A MOIST AND VERY UNSTABLE AIRMASS WILL TRIGGER THESE STORMS. THERE IS A CHANCE OF THUNDERSTORMS AGAIN SATURDAY NIGHT INTO SUNDAY MORNING AS A STRONG COLD FRONT SLIDES ACROSS THE STATE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY OR TONIGHT. LCZ422-423-460-LEZ444-LHZ361>363-421-422-441>443-462>464-250830- 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- 810 PM EDT WED JUN 24 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE ERIE...LAKE HURON AND LAKE ST CLAIR. .DAY ONE...TODAY AND TONIGHT ISOLATED THUNDERSTORMS ARE EXPECTED THIS EVENING WITH THE BEST COVERAGE OVER SAGINAW BAY. THESE STORMS ARE NOT EXPECTED TO BE SEVERE. THE STRONGEST STORMS...WHICH WILL BE CONFINED TO SAGINAW BAY...WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 50 MPH AND LOCALLY HEAVY RAINFALL AS THEY MOVE SOUTHEAST AT 20 MPH. THE HOT AND HUMID AIRMASS OVER THE REGION WILL HELP TRIGGER THESE ISOLATED THUNDERSTORMS. A WEAK COLD FRONT WILL SETTLE INTO THE AREA LATE TONIGHT...WHICH WILL TRIGGER MORE SCATTERED THUNDERSTORM DEVELOPMENT AFTER MIDNIGHT. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY THUNDERSTORMS ARE LIKELY ON THURSDAY. THERE IS A SLIGHT CHANCE OF SEVERE WEATHER WITH THESE STORMS. A SLOW MOVING COLD FRONT AND A MOIST AND VERY UNSTABLE AIRMASS WILL TRIGGER THESE STORMS. THERE IS A CHANCE OF THUNDERSTORMS AGAIN SATURDAY NIGHT INTO SUNDAY MORNING AS A STRONG COLD FRONT SLIDES ACROSS THE STATE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY OR TONIGHT. SC/SF/DG 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 337 PM EDT WED JUN 24 2009 MIZ063-242015- ST. CLAIR- 337 PM EDT WED JUN 24 2009 ...SIGNIFICANT WEATHER ADVISORY... AT 336 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER SOUTHEASTERN ST. CLAIR COUNTY...MOVING SOUTH AT 10 MPH. ONE HALF INCH DIAMETER HAIL...WINDS GREATER THAN 40 MPH...OCCASIONAL CLOUD TO GROUND LIGHTNING...BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... MARINE CITY... 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. MR
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 732 PM EDT WED JUN 24 2009 MIZ047-048-250100- BAY MI-MIDLAND MI- 732 PM EDT WED JUN 24 2009 ...SIGNIFICANT WEATHER ADVISORY FOR MIDLAND AND BAY COUNTIES UNTIL 900 PM EDT... AT 730 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM BENTLEY TO 7 MILES NORTHWEST OF COLEMAN...AND MOVING SOUTHEAST AT 20 MPH. WIND GUSTS UP TO 40 MPH WILL BE POSSIBLE WITH THESE STORMS...ALONG WITH LOCALLY HEAVY RAINFALL. LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...COLEMAN... PINCONNING...SANFORD...MIDLAND...AUBURN...BENTLEY...OIL CITY... EDENVILLE...PLEASANT VALLEY...LINWOOD...KAWKAWLIN...MOUNT FOREST... NORTH BRADLEY...BOMBAY...PORTER TOWNSHIP...AVERILL...GORDONVILLE... CRUMP...WILLARD AND BAY CITY STATE PARK. IF A THUNDERSTORM APPROACHES YOUR AREA...TAKE SHELTER INSIDE AND WAIT FOR THE STORM TO PASS. DG
The Grand Rapids radar (KGRR), 110 km away, was scanning. The volume nearest the first event began at 00:55 UTC.
1 thunderstorm wind. Local standard time, as filed.
Several small trees were reported blown down.
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, June 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: 182329.