1 flash flood, as filed by the National Weather Service.
Every event with a place to put it; 1 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 Binghamton, NY wrote its last area forecast discussion before the first event at Aug 11, 7:55 PM EST, 2 hours 35 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BINGHAMTON NY 855 PM EDT MON AUG 11 2003 CONVECTIVE ACTIVITY ON THE WANE. MOST OF IT HAS DSPTD LINGERING ACTIVITY OVER THE FINGER LAKES AND WRN MOHAWK VLY/SRN TUG SHJOULD PROPAGATE OUT OF THE BGM CWA SHORTLY. THEREFORE PLAN ON DROPPING THE FLASH FLOOD WATCH WITH THE EVENING UPDATE. COULD SEE SOME ISOLD/WDLY SCT ACTIVITY OVERNGT SO WILL KEEP A LOW CHC POP FOR A SHOWER OR TSTM. WILL ALSO ADD AREAS OF FOG TO THE ZONES/GRIDS. OTRW NO CHGS PLANNED TO CRNT FCST. PREV AFD BLO. BRADY ------------------------------------------------------------------- BIG PICTURE...FLATTENING POSITIVE PNA PATTERN WILL CONTINUE TO WEAKEN THE ERN US TROUGH AT 500 MB...AND EVENTUALLY ALLOW THE DEVELOPMENT OF A WEAK 500 MB RIDGE. TONIGHT...HEAVY RAINERS WILL CONTINUE INTO THIS EVENING...WILL HAVE TO WAIT UNTIL AFTER SUNSET BEFORE THINGS BEGIN TO DIE DOWN. ALTHOUGH THE THREAT OF SHOWERS WILL CONTINUE THROUGHT THE NIGHT AS DYING FRONT WILL CREATE WEAK CONVERGENCE IN MOIST AIRMASS. TUESDAY...NOT MUCH CHANGES...ALTHOUGH WHAT IS LEFT OF FRONT WILL HAVE BETTER POSSIBILITY OF PRODUCING SHRA/TSRA...SO WILL GO WITH LKLY POPS TO N...CHC TO THE S. VERTICAL WIND PROFILES MORE ENERGETIC THAN TODAY...SO EXPECT BETTER FASTER CELL MOVEMENT...BUT COULD STILL SEE SOME BACK BUILDING HEAVY RAINERS...THOUGH NOT AS GREAT A THREAT AS TODAY. TUESDAY NIGHT...500 MB CLOSED LOW BEGINS TO FILL MORE RAPIDLY...AND RIDGE BEGINS TO PUSH OVER THE TOP OF IT...ACROSS THE GREAT LAKES. PRESENCE OF SFC BOUDARY AND SOME CVA WILL PRECLUDE TAKING THE CHC POPS OUT OF THE FORECAST THOUGH. WED...LOOKS LIKE THERE WILL BE MORE SUN...BUT SIGNIFICANTLY DRIER AIR NEVER REALLY MAKES IT IN (ALTHOUGH TDS DO DROP INTO THE LOW 60S). LINGERING...BUT NEBULOUS...SFC BOUDARY COULD FIRE OFF A FEW TSRA IN THE AFTERNOON...SO CHC POPS INCLUDED SRN 2/3 CWA. BEYOND WED... IT STILL APPEARS THAT A PATTERN CHANGE IS IN THE OFFING AS ALL LONGER RANGE COMPUTER GUIDANCE FILLS THE EASTERN U.S TROUGH AND BUILDS AT LEAST A PIECE OF THE HIGH PLAINS UPPER RIDGE EASTWARD BY LATER THIS WEEK. AS A RESULT, WELL LEAVE THE FORECAST RAIN-FREE THROUGHOUT THIS TIME FRAME. THE GFS MODEL IS MORE AMPLIFIED IN DROPPING A SHORT WAVE DOWN ACROSS NY/PA IN THE NORTHWEST FLOW PATTERN ALOFT FRIDAY NIGHT INTO SATURDAY. HOWEVER, MODEL CONSENSUS IS THAT THIS WAVE WILL BE WEAKER AND FURTHER NORTH, AND WELL GO ALONG WITH THIS LINE OF THINKING. WE BUMPED UP TEMPERATURES SLIGHTLY BOTH IN THE THURSDAY/FRIDAY TIME FRAME AND AGAIN EARLY NEXT WEEK TO MATCH GUIDANCE/CLIMATE VALUES MORE CLOSELY. AVIATION... CONVECTION IN FULL SWING AGAIN THIS AFTERNOON AS THE LATEST SHORT WAVE ROTATES UP THROUGH THE REGION. WE EXPECT THE BEST FORCING TO SHIFT MORE TOWARDS THE NORTHERN TAF SITES (SYR/UCA) THIS EVENING, THEN OUT OF THE AREA OVERNIGHT. UP UNTIL THE 02Z-04Z TIME FRAME THIS EVENING, THUNDER AND LOCALIZED HEAVY RAIN WILL BE INCLUDED FOR ALL SITES. CONDITIONS WILL DETERIORATE TO MVFR AT TIMES. AFTER 06Z, LOW CLOUDS AND FOG WILL RULE ONCE AGAIN. WELL HIT THE USUAL CULPRITS THE HARDEST (ELM/BGM/ITH/UCA) THROUGH 12Z-13Z. STRATUS CLOUDS AND FOG ARE EXPECTED TO LIFT BY MID-MORNING, WITH MAINLY VFR CONDITIONS THEN PREVAILING. THERE COULD BE SOME HIT AND MISS SHOWERS AND THUNDERSTORMS AGAIN LATER TUESDAY AFTERNOON, BUT COVERAGE AND INTENSITY SHOULD BOTH BE LESS THAN WHAT WERE SEEING TODAY. .BGM...FLOOD WATCH THROUGH THIS EVENING ENTIRE CWA. TON-WED...CEMPA WED NIGHT+/AVIATION...JUREWICZ
NYZ009-015>018-022>025-036-037-044>046-055>057-062-PAZ038>040-043- 044-047-048-072-121000- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BINGHAMTON NY 425 AM MON AUG 11 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW YORK AND NORTHEAST PENNSYLVANIA. .DAY ONE...TODAY... SHOWERS AND THUNDERSTORMS WILL BECOME MORE WIDESPREAD TODAY AND PRODUCE LOCALLY HEAVY RAINFALL THROUGH THIS EVENING. A FLOOD WATCH IS IN EFFECT THROUGH THIS EVENING FOR MUCH OF CENTRAL NEW YORK AND NORTHEAST PENNSYLVANIA. SEE WATCH STATEMENT ALBFFABGM FOR MORE DETAILS. .DAYS TWO THROUGH SEVEN... SHOWERS AND THUNDERSTORMS WILL CONTINUE INTO WEDNESDAY. THE GREATEST THREAT WILL CONTINUE TO BE LOCALLY HEAVY RAINFALL. .SPOTTER CALL TO ACTION STATEMENT... SKYWARN SPOTTER ACTIVATION IS NOT EXPECTED TODAY.
The Binghamton radar (KBGM), 115 km away, was scanning. The volume nearest the first event began at 03:28 UTC.
1 flash flood. Local standard time, as filed.
An isolated slow-moving thunderstorm produced around 2.5 inches of rain in a short period of time in Hornell and Addision causing more flash flooding of streams and creeks.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2003Every state in 2003This day in weather historyWarnings in New York, 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: 5332700.