11 thunderstorm wind, as filed by the National Weather Service.
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 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 Jul 7, 7:27 PM EST, 7 hours 15 minutes earlier.
SOUTHEAST MICHIGAN AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 827 PM EDT MON JUL 7 2003 WILL SEND OUT A QUICK UPDATE AS DRY AIR IN THE WAKE OF THE MCS THAT MOVE THROUGH FAR SOUTHERN LOWER MICHIGAN HAS REALLY STABILIZED SOUTHEAST MICHIGAN. EVEN STORMS OVER NORTHERN INDIANA HAVE WEAKENED AS THEY MOVED ESE INTO THE STABLE AIR OVER NORTHWEST OHIO. WILL TIME THUNDERSTORMS FOR AFTER MIDNIGHT...BUT WILL WORD AS A CHANCE RATHER THAN SCATTERED. 18Z MESO-ETA AND AVN ALONG WITH 21Z RUC STILL INDICATE SOME INCREASE IN THE INSTABILITY OVERNIGHT WITH CAPES EXCEEDING 2000 J/KG. THE COLD FRONT CONTINUES TO SLOWLY DRIFT TO SOUTHEAST AND WILL GET CLOSE ENOUGH TO THE CWA TO BRING JUST A BIT MORE CONVERGENCE AFTER 06Z. ADDITIONALLY CLUSTER OF SEVERE THUNDERSTORMS ACROSS IA AND NW IL MAY BECOME ORGANIZED ENOUGH TO PUSH TOWARD THE EXTREME SOUTHERN PORTIONS OF THE STATE AS MID LEVEL WINDS STRENGTHEN JUST A BIT. THEREFORE WILL KEEP THE HIGHEST POPS IN THE SOUTH PORTION OF THE CWA. OTHERWISE...NO CHANGE TO LOW TEMPS...CLOUDS OR WINDS. RBP AFTERNOON DISCUSSION FOLLOWS... A SHORT WAVE TROUGH OVER NORTHERN ONTARIO HAS AN ASSOCIATED SURFACE COLD FRONT EXTENDING ACROSS CENTRAL UPPER MICHIGAN AND CENTRAL WISCONSIN. THE AIRMASS ACROSS LOWER MICHIGAN AHEAD OF THE FRONT IS ONLY MODESTLY UNSTABLE AS LAST NIGHTS CONVECTION AND THE MCS ACTIVITY FROM EARLIER TODAY IN THE SOUTH HAS LAID OUT SEVERAL OUTFLOW BOUNDARIES ACROSS THE REGION. CONVECTION IS EXPECTED TO DEVELOP THIS EVENING ACROSS IOWA AND NORTHERN ILLINOIS AS THE BOUNDARY LAYER IN THIS REGION HAS BECOME QUITE UNSTABLE...WITH DEWPOINTS WELL IN THE 70S AND TEMPS NEAR 90. THE MAIN FORECAST CHALLENGE FOR TONIGHT WILL BE THE CHANCES OF THUNDERSTORMS WITH THE APPROACH OF THE COLD FRONT AND POSSIBLE UPSTREAM CONVECTIVE DEVELOPMENT. SEVERE THUNDERSTORMS AND HEAVY RAINFALL POTENTIAL WILL THEN BE OF CONCERN TUESDAY INTO TUESDAY NIGHT AS THE FRONT REMAINS NEARLY STATIONARY OVER SOUTHERN LOWER MICHIGAN. NOT MUCH CONVECTION HAS DEVELOPED AHEAD OF THIS COLD FRONT THUS FAR AS THERE IS SOME LARGE SCALE SUBSIDENCE HINDERING IT. SPECIAL 18Z DTX SOUNDING ONLY SHOWED A COUPLE HUNDRED J/KG CAPE IN THE WAKE OF THE LAST COUPLE OF CONVECTIVE COMPLEXES TO MOVE THROUGH THE AREA. WITH SATELLITE TRENDS SHOWING BREAKS IN THE CLOUD COVER...TEMPS SHOULD CONTINUE TO REBOUND OVER THE NEXT COUPLE OF HOURS. MODIFIED 18Z DTX SOUNDING FOR 84/70 ACTUALLY YIELDS 2900 J/KG CAPE. SO WITH SOME LINGERING OUTFLOW BOUNDARIES AND DIFFERENTIAL HEATING BOUNDARIES...SOME WIDELY SCATTERED CONVECTION IS POSSIBLE THIS EVENING. THUNDERSTORMS MAY BECOME MORE WIDESPREAD OVERNIGHT WITH THE APPROACH OF THE SURFACE COLD FRONT AND POTENTIAL FROM UPSTREAM CONVECTION PUSHING INTO LOWER MICHIGAN. GIVEN THE WEAK FORCING ALONG THE FRONT AND UNCERTAINTY IN WHERE THUNDERSTORM COMPLEXES WILL DEVELOP UPSTREAM...I WILL KEEP POPS SCATTERED TONIGHT. ANY THUNDERSTORM THAT DEVELOPS TONIGHT WILL HAVE THE POTENTIAL FOR BECOMING SEVERE GIVEN THE AVAILABLE INSTABILITY AND DEEP LAYER SHEER AS 40-50 KNOT MID LEVEL WINDS MOVE ACROSS THE GREAT LAKES. BOTH THE ETA AND GFS INDICATE THE FRONT WILL STALL OUT ACROSS THE SOUTHERN PORTIONS OF THE FORECAST AREA ON TUESDAY. MODEL PLAN VIEWS SHOW CAPE AROUND 3K J/KG SOUTH OF THE BOUNDARY WITH DEWPOINTS IN THE MID 70S. CONVERGENCE ALONG THE BOUNDARY AND THE INSTABILITY WILL BE ENOUGH TO CONTINUE A CHANCE OF THUNDERSTORMS FOR THE SOUTHERN 2/3RDS OF THE FORECAST AREA. MODELS SHOW THE FRONT SLIDING SOUTH OF THE STATE TUESDAY NIGHT. HOWEVER...CONVECTION SHOULD BECOME MORE WIDESPREAD AS SFC-850MB FRONTOGENETICAL FORCING STRENGTHENS AS THE ENTRANCE REGION OF A 250MB JET MOVES OVER SOUTHERN LOWER MICHIGAN. CONTINUED STRONG MID LEVEL WINDS AND AMPLE INSTABILITY WILL RESULT IN THE RISK FOR SEVERE STORMS THROUGH THE ENTIRE DAY. HEAVY RAINFALL WILL BE A CONCERN TUESDAY NIGHT AS THE LOW LEVEL JET WILL INTERSECT THE SLOW MOVING FRONTAL BOUNDARY...LEADING TO STRONG LOW LEVEL CONVERGENCE. THIS JET WILL ALSO TRANSPORT COPIOUS MOISTURE ATOP THE SURFACE FRONTAL BOUNDARY (PRECIPITABLE WATER VALUES APPROACH 2 INCHES SOUTH OF THE BOUNDARY). THE JET WILL LIKELY ALLOW PLENTY OF INSTABILITY TO DEVELOP ABOVE THE STABLE LAYER NORTH OF THE FRONT. AT THIS POINT...LOOKS LIKE A REGENERATIVE MCS IS LIKELY TO FORM OVER NORTHERN ILLINOIS/SOUTHERN LOWER MICHIGAN. I WILL MENTION THE POTENTIAL FOR HEAVY RAIN IN THE HAZARDOUS WEATHER OUTLOOK BUT HOLD OFF ON ANY HEADLINES AS THE BETTER LOW LEVEL CONVERGENCE LOOKS FOCUSED WEST OF THE AREA AND MESO-SCALE OUTFLOWS MAY FORCE CONVECTIVE DEVELOPMENT FARTHER SOUTH THAN INDICATED BY THE ETA AND GFS. HIGH PRESSURE WILL BUILD INTO THE REGION FROM THE NORTH ON WEDNESDAY WHICH WILL HELP PUSH THE FRONT FARTHER SOUTH AND BRING DRYER AND COOLER AIR INTO THE REGION. THE GFS IS STILL INDICATING A CONVECTIVE COMPLEX CROSSING THE BOUNDARY ON THURSDAY AND AFFECTION THE SOUTHERN HALF OF THE FORECAST AREA...WHILE THE ETA KEEPS ALL CONVECTION SOUTH. WITH THE GFS TRENDING FARTHER SOUTH WITH THE FRONT...I WILL REMOVE POPS FROM THE NORTH ON THURSDAY. THE FLOW ALOFT WILL AMPLY INTO THE WEEKEND WITH A DEEPENING TROUGH OVER THE GREAT LAKES/EASTERN US. THIS SHOULD KEEP TEMPS NEAR TO SLIGHTLY BELOW NORMAL THROUGH THE WEEKEND. THE GFS BRINGS A STRONG IMPULSE INTO THE REGION UNDER THE NORTHWEST FLOW ALOFT ON SUNDAY. AT THIS POINT...I WILL INTRODUCE A CHANCE OF THUNDERSTORMS TO THE FORECAST ON SUNDAY. .DTX...NONE. CONSIDINE EXPERIMENTAL GRAPHICAL FORECASTS ARE AVAILABLE ONLINE AT HTTP://WWW.CRH.NOAA.GOV/DTX (ALL LOWER CASE)
MIZ047>049-053>055-060>063-068>070-075-076-082-083-081200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 845 PM EDT MON JUL 7 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST LOWER MICHIGAN .DAY ONE...TONIGHT THERE IS A CHANCE OF THUNDERSTORMS ACROSS ALL OF SOUTHEAST LOWER MICHIGAN AFTER MIDNIGHT...AND THERE IS A SLIGHT CHANCE THAT THEY COULD BECOME SEVERE. SOME OF THESE STORMS MAY BE CAPABLE OF PRODUCING WIND GUSTS TO 60 MPH AND HAIL TO ONE INCH IN DIAMETER. HEAVY RAINFALL AND FREQUENT LIGHTNING IS ALSO POSSIBLE WITH SOME OF THE STORMS. THUNDERSTORM MOVEMENT WILL BE EAST AT 40 MPH. AN APPROACHING COLD FRONT IS RESPONSIBLE FOR THE THUNDERSTORM CHANCES TONIGHT. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY SCATTERED THUNDERSTORMS ARE EXPECTED ALONG AND SOUTH OF INTERSTATE 69 TUESDAY MORNING AND AFTERNOON. SOME OF THESE STORMS MAY BE SEVERE WITH DAMAGING WINDS AND LARGE HAIL. THUNDERSTORMS ARE LIKELY TUESDAY NIGHT SOUTH OF M 59. TO THE NORTH THERE IS A CHANCE OF THUNDERSTORMS. SOME OF THESE STORMS MAY ALSO BE SEVERE. THE THUNDERSTORMS ON TUESDAY WILL BE CAPABLE OF PRODUCING VERY HEAVY RAINFALL...ESPECIALLY THOSE THAT DEVELOP TUESDAY NIGHT. THERE IS ANOTHER CHANCE OF THUNDERSTORMS WEDNESDAY AND WEDNESDAY NIGHT ALONG AND SOUTH OF A DETROIT TO ANN ARBOR LINE. THESE THUNDERSTORMS ARE NOT EXPECTED TO BE SEVERE. FINALLY...A CHANCE OF THUNDERSTORMS EXISTS SOUTH OF INTERSTATE 69 ON THURSDAY. THESE STORMS ARE ALSO NOT EXPECTED TO BE SEVERE. A SLOW MOVING FRONTAL BOUNDARY IS RESPONSIBLE FOR THE THUNDERSTORM CHANCES THIS WEEK. .SPOTTER INFORMATION STATEMENT... DISPATCHERS...PLEASE NOTIFY YOUR EMERGENCY MANAGER IMMEDIATELY. SPOTTER ACTIVATION MAY BE REQUIRED LATE TONIGHT. && STAY TUNED TO NOAA WEATHER RADIO...OR LOCAL MEDIA OUTLETS...FOR THE LATEST FORECAST INFORMATION FROM THE NATIONAL WEATHER SERVICE. YOU CAN ALSO OBTAIN THE LATEST FORECAST ON THE NATIONAL WEATHER SERVICE WEB SITE HTTP://WWW.CRH.NOAA.GOV/DTX/ (ALL LOWER CASE) CONSIDINE/RBP
The Detroit radar (KDTX), 90 km away, was scanning. The volume nearest the first event began at 07:39 UTC.
11 thunderstorm wind. Local standard time, as filed.
A trained spotter estimated winds of 60 to 65 mph on Sand Lake.
Local law enforcement reported a tree blown down on the Lost Peninsula.
Local law enforcement reported large tree limbs and wires down.
Trained spotters reported a two and half foot tree blown down.
A trained spotter reported trees and wires down.
A trained spotter reported trees and large limbs down.
Local law enforcement reported trees and power lines down.
Emergency management reported numerous trees down.
Spotters reported several trees and large limbs down.
A trained spotter reported large limbs and small trees blown down.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Michigan in 2003Every state in 2003This day in weather historyWarnings in Michigan, July 2003
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: 5367011, 5367012, 5367002, 5367005, 5367006, 5367007, 5367008, 5367004, 5367003, 5367009, 5367010.