4 flood, as filed by the National Weather Service.
Every event with a place to put it; 4 filed by county or forecast zone are drawn at its center, in a lighter ring. 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 Wilmington, OH wrote its last area forecast discussion before the first event at Aug 28, 5:51 AM EST, 1 hour 54 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED FOR 12Z AVIATION NATIONAL WEATHER SERVICE WILMINGTON OH 651 AM EDT SAT AUG 28 2004 .AVIATION (12Z-12Z)... SCT CONVECTION HAS DVLPD IN THE LAST TWO HOURS FROM NEAR KFWA SE TO JUST NORTH OF KCMH...WITH WDLY SCT ACTIVITY CURRENTLY BTWN KDAY...KILN AND KCMH. CONVECTION FEEDING OFF OF LO LVL CONV BOTH AT 925 AND 850 MB NOTED ON CURRENT RUC. MORE CONSOLIDATED CONVECTION ACRS NRN FCST AREA ALMOST LOOKS LIKE SOME FORM OF A WARM FRONT...AS SFC WINDS HAVE BACKED TO S/SE IN EASTERN OHIO. WX IS BEING DRIVEN BY MESOSCALE...AND AS A RESULT BOTH ETA AND GFS HAVING PROBLEMS RESOLVING SMALL SCALE FEATURES. HAVE RELIED HEAVILY ON CURRENT RUC FOR FIRST 12 HOURS OF TAF FCST. WITH SCT ACTIVITY EXPECTED TO CONTINUE FOR FEW HOURS THIS MRNG...HAVE STARTED NRN TAF SITES WITH VCTS AND HIT SC A LITTLE HARDER. HAVE THEN INSERTED DRY PERIOD FROM 14Z INTO MID AFTN. LO LVL CONV RELAXES...AND APPEARS THAT MAY SEE SOME SUN BEFORE CU FIELD BEGINS TO DVLP. FRNTL BNDRY WILL MOVE SLOWLY EASTWARD AS SFC WAVE RIDES ALONG IT LATE THIS AFTN INTO EVNG. MAIN KICKERS FOR CONVECTION THIS AFTN WILL BE AMOUNT OF SFC HEATING...INSTABILITY AND LO LVL CONVERGENCE. RUC INDCG SBCAPES TO APPCH 4000 J/KG BY 21Z...AND THIS APPEARS REASONABLE AS SHOULD SEE DECENT AMOUNT OF SUNSHINE FOR LATE MRNG/ERLY AFTN. AS SFC WAVE AND ASSOCD VORT LOBE MOVE INTO NW OHIO THIS EVNG...BETTER ORGANIZED AND MORE WIDESPREAD TSTM ACITIVITY EXPECTED AS LO LVL CONV INCREASES. HAVE BROUGHT TSTMS INTO ALL TAFS BTWN 00-03Z...CONTINUING THRU OVERNIGHT HOURS. STILL SOME UNCERTAINTY REGARDING HOW EXTENSIVE CONVECTION WILL BE TONIGHT...BUT FEEL MENTION IS WARRANTED AS FRNTL BNDRY MOVES INTO REGION. WINDS WILL REMAIN S/SW UNTIL FROPA...WHICH WILL NOT TAKE PLACE UNTIL AFT 12Z SUN. && .SHORT TERM (TODAY THROUGH MONDAY)... SURFACE ANALYSIS SHOWS WEAK SURFACE LOW OVER NRN ILLINOIS WITH SOUTHERLY FLOW INTO FORECAST AREA. KILN RADAR SHOWING RW/TRW IN WEST CENTRAL OHIO WITH THE GENERAL WEAKENING TREND. ETA/GFS ARE GENERALLY IN DESCENT AGREEMENT WITH MAJOR FEATURES. THE ETA APPEARS TO MUCH CONVECTION TODAY. THIS SHOWS UP IN THE QPF FIELDS AND ALSO IN ITS SURFACE TEMPERATURE. CONTINUE TO THINK THE BEST THREAT OF RW/TRW WILL BE LATTER THIS AFTERNOON INTO THE OVERNIGHT WITH THE COLD FRONT MOVING THROUGH. CONVECTION WILL FOCUS ALONG WARM FRONT (JUST NORTH OF I-70) AND OUTFLOWS LEFT OVER FROM EARLY MORNING CONVECTION. MODERATE INSTABILITY IS EXPECTED...HOWEVER WIND FIELD IS GENERALLY WEAK. THIS WILL RESULT IN STRONG STORMS WITH POSSIBLY A FEW SEVERE. WILL LOWER POPS TONIGHT FROM 60% TO 50%. THE REASON FOR THIS IS THE LACK OF ORGANIZED LIFT. THERE WILL BE A COLD FRONT AND MARGINAL INSTABILITY. HOWEVER...AT THIS POINT THERE DOES NOT APPEAR TO BE MUCH SYNOPTIC LIFT. WILL CONTINUE TO HANG ON TO POPS SUNDAY AS A COMBINATION OF THE NORTHERN JET STREAM DIPPING INTO GREAT LAKES AND TS #7 OFF THE CAROLINA COAST WILL SLOW UP THE EASTWARD PROGRESSION OF THE FRONT. AS FOR MONDAY SURFACE HIGH BUILDS IN BRINGING PLENTY OF SUNSHINE. MAV TEMPS LOOK GREAT...ONLY MADE MINOR ADJUSTMENTS. && .LONG TERM (MONDAY NIGHT THROUGH SUNDAY NIGHT)... NO CHANGE TO CURRENT FORECAST FOR EARLIER DISCUSSION SEE BELOW. && .PREVIOUS DISCUSSION... LONG TERM (MONDAY THROUGH FRIDAY)... THE FOLLOWING WAS ORIGINALLY ISSUED AT 250 PM EDT FRI AUG 27 2004. HIGH PRESSURE WILL BUILD IN MONDAY FROM THE WEST AND WILL DOMINATE OUR WEATHER PATTERN THROUGH THE EXTENDED BY MODEL CONSENSUS. EXPECT TEMPS TO BE SLIGHTLY BELOW NORMAL THROUGH MID WEEK. THE HIGH SHOULD MOVE EAST OF THE AREA BY THURSDAY...ALLOWING A MORE SOUTHERLY FLOW WITH TEMPS RETURNING TO NEAR NORMAL LEVELS. WILL LEAVE EXTENDED DRY AT THIS POINT...BUT A WEAK BNDRY MAY INFLUENCE THE SOUTHERN FCST AREA THURSDAY INTO FRIDAY. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...NONE. IN...NONE. KY...NONE. && AVIATION: RYAN SHORT TERM: TIPTON LONG TERM: JWC
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE WILMINGTON OH 504 AM EDT SAT AUG 28 2004 INZ050-058-059-066-073>075-080-KYZ089>100-OHZ026-034-035-042>046- 051>056-060>065-070>074-077>082-088-290903- ADAMS OH-AUGLAIZE OH-BOONE KY-BRACKEN KY-BROWN OH-BUTLER OH- CAMPBELL KY-CARROLL KY-CHAMPAIGN OH-CLARK OH-CLERMONT OH-CLINTON OH- DARKE OH-DEARBORN IN-DELAWARE OH-FAIRFIELD OH-FAYETTE OH-FAYETTE IN- FRANKLIN OH-FRANKLIN IN-GALLATIN KY-GRANT KY-GREENE OH-HAMILTON OH- HARDIN OH-HIGHLAND OH-HOCKING OH-KENTON KY-LEWIS KY-LICKING OH- LOGAN OH-MADISON OH-MASON KY-MERCER OH-MIAMI OH-MONTGOMERY OH- OHIO IN-OWEN KY-PENDLETON KY-PICKAWAY OH-PIKE OH-PREBLE OH-RIPLEY IN- ROBERTSON KY-ROSS OH-SCIOTO OH-SHELBY OH-SWITZERLAND IN-UNION OH- UNION IN-WARREN OH-WAYNE IN- 504 AM EDT SAT AUG 28 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN INDIANA...NORTHERN KENTUCKY AND THE SOUTHWEST QUARTER OF OHIO. .DAY ONE...TODAY SCATTERED STRONG THUNDERSTORMS TODAY WILL BRING VERY HEAVY RAIN AND SOME GUSTY WINDS. A FEW STORMS COULD TURN SEVERE THIS AFTERNOON AND EVENING. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE MAINLY SOUTH AND EAST OF I-71. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED. TIPTON
The national radar mosaic for the moment the first event began.
4 flood. Local standard time, as filed.
Scattered strong thunderstorms produced locally heavy rainfall of two to three inches across portions of central and western Ohio. Several roads were flooded between Dayton and Xenia, across western Darke County and in northern Licking County from the slow-moving thunderstorms.
Scattered strong thunderstorms produced locally heavy rainfall of two to three inches across portions of central and western Ohio. Several roads were flooded between Dayton and Xenia, across western Darke County and in northern Licking County from the slow-moving thunderstorms.
Scattered strong thunderstorms produced locally heavy rainfall of two to three inches across portions of central and western Ohio. Several roads were flooded between Dayton and Xenia, across western Darke County and in northern Licking County from the slow-moving thunderstorms.
Scattered strong thunderstorms produced locally heavy rainfall of two to three inches across portions of central and western Ohio. Several roads were flooded between Dayton and Xenia, across western Darke County and in northern Licking County from the slow-moving thunderstorms.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2004Every state in 2004This day in weather historyWarnings in Ohio, August 2004
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: 5421874, 5421873, 5421875, 5421872.