1 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 Northern Indiana wrote its last area forecast discussion before the first event at Aug 11, 2:17 PM EST, 42 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORTHERN INDIANA 217 PM EST MON AUG 11 2003 PUBLIC DISCUSSION FOR 330 PM... UPPER LOW IS FORECAST TO CONTINUE TO WOBBLE JUST TO THE EAST AND SOUTH OF THE FORECAST AREA TONIGHT THRU THURSDAY. SATELLITE IMAGERY INDICATES A LOBE OF ENERGY MOVING SOUTHWEST OVER SOUTHERN LAKE MI THIS AFTERNOON. THIS FEATURE IS KICKING OFF SCATTERED THUNDERSTORMS DUE TO A PRETTY UNSTABLE ATMOSPHERE. THE THREAT OF SEVERE WEATHER IS LOW...BUT A FEW STORMS MAY GENERATE DAMAGING WINDS AND/OR LARGE HAIL THRU SUNDOWN. THE UPPER LOW IS FORECAST TO DRIFT SOUTHEAST FAR ENOUGH THAT WE MAY ACTUALLY HAVE A DAY WITH NO RAIN IN THE FORECAST AREA ON WEDNESDAY. THIS WOULD BE THE FIRST DAY OF NO RAIN IN OVER A WEEK AND A HALF. THERE IS A SLIGHT CHANCE THAT STORMS MAY FIRE AGAIN THURSDAY AFTERNOON...BUT A FEW VITAL INGREDIENTS MAY BE MISSING (MAINLY A KICKER). WILL CONTINUE TO MONITOR. MODELS ARE IN AGREEMENT SO USED A BLEND. OTHER THAN A FEW TWEAKS HERE AND THERE GENERALLY ACCEPTED MOS AND OTHER MODEL SOLUTIONS. EXTENDED DISCUSSION... PRIMARY CHALLENGE IS SHOWER AND THUNDERSTORM POTENTIAL FOR SUNDAY AND MONDAY. SIGNIFICANT MODEL DIFFERENCES EXIST WITH ECMWF INDICATING 500 MB RIDGE OVER GREAT LAKES AND OHIO VALLEY ON SUNDAY...WHILE GFS BREAKS DOWN RIDGE AND BRINGS A WEAK MID LEVEL SHORTWAVE ACROSS. AT THE SURFACE...ECMWF IS MUCH SLOWER TO PUSH COLD FRONT OUT OF CENTRAL PLAINS THAN GFS. GFS TRENDED FASTER AND WEAKER WITH MID LEVEL SHORTWAVE PROGGED FOR SUNDAY...WHILE ECMWF TRENDED LESS PROGRESSIVE WITH 500 MB RIDGE AND CENTRAL PLAINS SHORTWAVE TROUGH. AT THE SURFACE...BOTH MODELS TRENDED SLOWER WITH COLD FRONT PUSHING OUT OF THE CENTRAL PLAINS. CONSIDERING TRENDS...CONFIDENCE LOW ON SHOWER AND STORM POTENTIAL FOR SUNDAY...BUT FOR CONTINUITY...WILL KEEP LOW CHANCE POP. CHANCE POPS FOR STORMS ON MONDAY LOOK REASONABLE. WITH INCREASING LOW LEVEL MOISTURE AND 500 MB RIDGE OVER REGION...HAVE BUMPED UP OVERNIGHT LOWS FOR FRIDAY AND SATURDAY A COUPLE OF DEGREES. AVIATION DISCUSSION FOR 18Z... MID LEVEL DISTURBANCES ROTATING AROUND UPPER LOW WILL TRIGGER SCATTERED SHOWERS AND THUNDERSTORMS THIS AFTERNOON AND EVENING. ADDITIONAL STORMS WILL BE GENERATED ALONG TROUGH OF LOW PRESSURE EXTENDING FROM LAKE ONTARIO TO LOWER MICHIGAN. STORMS ALREADY PRESENT ALONG THIS BOUNDARY IN AREA OF MOISTURE CONVERGENCE AND INSTABILITY...LI VALUES TO MINUS 4. BOUNDARY LAYER RELATIVE HUMIDITY WILL BE AROUND 90 PERCENT AROUND DAYBREAK...SO WILL INCLUDE MVFR VISIBILITIES WITH FOG IN TAFS. WILL ALSO INCLUDE A TEMPO GROUP FOR IFR VISIBILITY AND CEILING AT FWA...GIVEN WEAKER PRESSURE GRADIENT. BARJENBRUCH .IWX... IN...NONE. MI...NONE. OH...NONE. EDDY/BARJENBRUCH
INZ003>009-012>018-020-022>027-032>034-MIZ077>081-OHZ001-002-004-005- 015-016-024-025-121015- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NORTHERN INDIANA 520 AM EST MON AUG 11 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN INDIANA...NORTHWEST OHIO AND SOUTHWEST LOWER MICHIGAN. .DAY ONE...TODAY AND TONIGHT THERE IS A CHANCE FOR THUNDERSTORM TODAY AND EARLY TONIGHT...BUT THE STORMS ARE NOT EXPECTED TO BECOME SEVERE. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THERE IS A CHANCE FOR THUNDERSTORMS ON TUESDAY...BUT THESE STORMS ARE NOT EXPECTED TO BECOME SEVERE. THERE IS ALSO A CHANCE FOR THUNDERSTORMS ON SUNDAY...BUT THE SEVERE POTENTIAL FOR THESE STORMS HAS NOT YET BEEN DETERMINED. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED. STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER DETAILS OR UPDATES, OR CHECK OUR WEB SITE AT WWW.CRH.NOAA.GOV/IWX
The Northern Indiana radar (KIWX), 53 km away, was scanning. The volume nearest the first event began at 20:00 UTC.
1 thunderstorm wind. Local standard time, as filed.
Large trees were reported down, with some blocking roads.
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, August 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: 5377986.