A warm, humid and unstable airmass resided over Central New York, and several upper level disturbances moving into the region triggered heavy rain producing showers and thunderstorms. These storms led to pockets of urban and small stream flash flooding in upstate New York.
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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 BGM wrote it up.
A warm, humid and unstable airmass resided over Central New York, and several upper level disturbances moving into the region triggered heavy rain producing showers and thunderstorms. These storms led to pockets of urban and small stream flash flooding in upstate New York.
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 Jul 22, 6:40 PM EST, 1 hour 15 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BINGHAMTON NY 740 PM EDT MON JUL 22 2013 .SYNOPSIS... A SOMEWHAT UNSTABLE ATMOSPHERE WILL YIELD SCATTERED SHOWERS AND THUNDERSTORMS THROUGH THIS EVENING. HOWEVER...THE MAIN BATCH OF RAIN WITH EMBEDDED THUNDER WILL OCCUR OVERNIGHT THROUGH TUESDAY MORNING AS A WAVE OF LOW PRESSURE MOVES THROUGH. A COLD FRONT WILL THEN PASS LATER TUESDAY AS SHOWERS DIMINISH. BEHIND THE FRONT...DRIER AND MUCH COOLER AIR IS EXPECTED WEDNESDAY AND THURSDAY. && .NEAR TERM /THROUGH TUESDAY/... 7 PM UPDATE... REGIONAL RADARS SHOWING A GOOD AMOUNT OF RAIN OVERSPREADING THE REGION IN ADVANCE OF A FAIRLY STRONG UPPER WAVE EJECTING EAST FROM THE LWR OHIO VLY. BULK OF ACTIVITY SO FAR HAS BEEN SHWRS WITH EMBEDDED THUNDER AND HAVE INCREASED POPS INTO THE HIGH LIKELY CATEGORY FOR A GOOD PORTION OF THE FCST REGION. EXPECT RAIN TO CONTINUE THROUGH THE EVENING AS NEXT PV ANOMALY UPSTREAM CONTINUES TO ADVANCE EAST THROUGH THE EVENING AND EARLY OVERNIGHT. WITH FAIRLY WEAK WINDS ALOFT...OVERALL SEVERE THREAT CONTINUES TO BE LOW WITH MAIN CONCERNS FOCUSED ON LOCALLY HEAVY RAIN AS PWAT VALUES APPROACH 2" PER LATEST BLENDED TPW SATELLITE GRAPHICS. SO FAR A FEW 2+" REPORTS HAVE BEEN RECEIVED BUT NO REPORTS OF ANY HYDRO PROBLEMS THUS FAR. BASED ON REPORTS...CONCERN THIS EVENING IS THAT RADAR IS UNDERESTIMATING RAINFALL TO SOME DEGREE. IN ANY EVENT...A FEW MORE FLS STATEMENTS APPEAR LIKELY AS WE GO INTO THE EARLY EVENING HRS AND WILL CONTINUE TO MONITOR. 300 PM UPDATE... SOUTHWEST FLOW AHEAD OF MAIN UPPER TROUGH IS RIDDLED WITH SMALL SHORTWAVES...AND ONE OF THEM IS MOVING IN ALONG WITH PEAK DIURNAL HEATING ALLOWING BLOSSOM OF SHOWERS THIS AFTERNOON FOR MOST OF THE REGION. ANOTHER WAVE WILL ZIP THROUGH LATER THIS EVENING. POPS UPDATED ACCORDINGLY...HIGH CHANCE TO LIKELY PLACED WITH WAVE PASSAGES. VERY LITTLE FLOW IN LOWEST 4 KM AND CAPES GENERALLY UNDER 1000 J/KG SO ONLY NON-SEVERE SCATTERED THUNDERSTORMS ARE EXPECTED TO ACCOMPANY THESE SHOWERS. MAIN UPPER WAVE SET TO PASS THROUGH LATER TONIGHT THROUGH TUESDAY MORNING. DECENT PRECIPITABLE WATER VALUES GET TO ABOUT AN INCH- AND-THREE-QUARTERS OR SO. THOUGH JET SUPPORT WILL NOT BE THAT GREAT...THE UPPER WAVE THAT PASSES ALONG WITH LIFTING WARM FRONT AND ABUNDANT MOISTURE SHOULD HAVE NO PROBLEM GENERATING A FAIR AMOUNT OF RAIN. I UPGRADED POPS...LIKELY OR CATEGORICAL...FOR ROUGHLY THE SOUTHEASTERN TWO-THIRDS OF THE COUNTY WARNING AREA...AND WENT WITH THE HIGHER QPF AS OFFERED BY HPC TONIGHT THROUGH TUESDAY. THIS INCLUDES 1.5 TO 1.8 INCHES ALONG POCONOS TO SULLIVAN COUNTY NY...AND BETWEEN 1.0 AND 1.5 INCHES FOR REMAINDER OF NEPA TO CATSKILLS...LESSER AMOUNTS FARTHER NORTHWEST. 1 HOUR FLASH FLOOD GUIDANCE FOR ALMOST THE ENTIRE AREA IS GREATER THAN 1.5 INCHES...AND MUCH IS MORE THAN 2.0 INCHES. OF COURSE...BULK OF OUR RAIN WILL BE GENERALLY SPREAD OUT OVER THE COURSE OF 12 HOURS. WITH WEAK STEERING BECAUSE OF LACK OF SHEAR...LOCALIZED HEAVIER RAIN IS POSSIBLE. HOWEVER...RECENT DRIER PATTERN AND EVAPOTRANSPIRATION OF MIDSUMMER WILL ALLOW GOOD AMOUNT OF RAIN TO BE ABSORBED...THUS NOT EXPECTING FLOOD PROBLEMS. BRIEF URBANIZED/POOR DRAINAGE WATER PROBLEMS ARE NOT OUT OF THE QUESTION UNDER THE HEAVIEST CELLS...OTHERWISE WE SHOULD BE FINE. UPPER WAVE AND DEEPER MOISTURE WILL START SHIFTING EAST TUESDAY AFTERNOON...BUT SURFACE WAVE OF LOW PRESSURE FOLLOWED BY COLD FRONT WILL STILL BE EVOLVING THROUGH THE AREA. THOUGH MAIN RAIN WILL BE IN THE MORNING...AT LEAST SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS MAY STILL OCCUR IN THE AFTERNOON AHEAD OF AND WITH THE COLD FRONTAL PASSAGE. && .SHORT TERM /TUESDAY NIGHT THROUGH THURSDAY/... 115 PM UPDATE... SURFACE COLD FRONT WILL NOT FINISHING PASSING THROUGH UNTIL TUESDAY NIGHT...BUT UPPER WAVE AND DEEPER MOISTURE WILL SHUNT EAST WELL AHEAD OF IT...SO LINGERING SHOWERS AND THUNDER WILL QUICKLY DIMINISH. A LAYER OF MOISTURE TRAPPED UNDER DEVELOPING SUBSIDENCE INVERSION COULD SQUEEZE OUT A SPRINKLE OR LIGHT SHOWER FOR SOME SPOTS EARLY WEDNESDAY MORNING...OTHERWISE LARGE CANADIAN HIGH PRESSURE TAKES OVER SCATTERING REMAINING CLOUDS OUT WITH TIME. QUITE A COOL AND DRY AIR MASS WITH 850MB TEMPERATURES DROPPING TO EVEN LESS THAN 10 CELSIUS FOR MUCH OF THE AREA...AND PRECIPITABLE WATER VALUES FALLING WELL UNDER AN INCH. SOME LOWER ELEVATIONS FROM NEAR THE NY/PA BORDER SOUTHWARD COULD GET UPPER 70S TO NEAR 80...BUT MAJORITY OF THE AREA ONLY IN THE LOW TO MID 70S FOR HIGHS WEDNESDAY...THE COOLEST DAY THIS MONTH OR WITHIN A FEW DEGREES OF IT. EITHER WAY...CHILLIEST NIGHT OF THE MONTH APPEARS EN ROUTE WEDNESDAY NIGHT. HIGH PRESSURE MOVING OVERHEAD...MAINLY CLEAR SKY AND DECOUPLED WIND SHOULD YIELD AMPLE RADIATIONAL COOLING FOR LOWS IN THE 50S AREAWIDE. UPPER 40S NOT OUT OF THE QUESTION IN A FEW OF THE COLDEST SPOTS /SHELTERED VALLEYS/ OF THE WESTERN CATSKILLS. MODEL CONSENSUS IS FOR HIGH PRESSURE TO KEEP IN CONTROL THURSDAY...THOUGH GRADIENT OF HIGHER PRECIPITABLE WATER VALUES IS NOT FAR TO OUR SOUTHEAST /ESPECIALLY THE NAM/. OTHER THAN A SLIGHT CHANCE OF A SHOWER IN THE POCONOS PA TO SULLIVAN COUNTY NY...I HAVE REMOVED MENTIONABLE RAIN CHANCES FROM THE FORECAST FOR THURSDAY...ANOTHER FAIRLY COOL DAY COMPARED TO THE REST OF WHAT HAS BEEN A VERY WARM MONTH. && .LONG TERM /THURSDAY NIGHT THROUGH MONDAY/... 3 PM MON UPDATE... AN UNSETTLED WEATHER PATTERN IS EXPECTED ACROSS THE AREA AS BROAD TROUGHING AND SW FLOW ALOFT IS EXPECTED TO SETTLE OVER THE NORTHEAST THROUGH NEXT WEEKEND. MULTIPLE VORT MAXES WILL TRAVEL AROUND THE BASE OF THE TROUGH AND EJECT NORTHEASTWARD RESULTING IN A CHANCE FOR SHOWERS AND THUNDERSTORMS EACH DAY THROUGH THE EXTENDED. MODELS PROJECT A COLD FRONT MOVING INTO OUR REGION SUNDAY WHICH WILL RESULT IN COOLER AND DRIER AIR FOR THE REGION. AS THE DRY AIR FUNNELS IN FROM THE WEST...A BRIEF DRY PERIOD MAY RETURN TO THE AREA. && .AVIATION /00Z TUESDAY THROUGH SATURDAY/... SHRA ARE RAPIDLY SPREADING ACROSS ALL TAF SITES IN C NY AND NE PA AT THIS TIME. KSYR AND KRME WILL SEE THE SHRA BEGIN ARND 1-2Z. BASICALLY THERE ARE VFR SHRA ALL TAFS WITH OCCASIONAL HEAVIER DOWNPOURS THAT BRING THE TERMINALS DOWN TO IFR AT TIMES. SO FOR ALL TAF SITES HAVE VFR SHRA TO START WITH TEMP GROUPS DOWN TO IFR TO ACCOUNT FOR HEAVIER SHRA UNTIL 4-5Z. THEN LATER TONIGHT AFTER 4-5Z AS THE SHRA BECOME MORE WIDESPREAD I HAVE 5-6SM IN SHRA AND BR WITH TEMPO GROUPS DOWN TO IFR TO ACCOUNT FOR HEAVIER SHRA WHICH WILL BE EMBEDDED. THUNDER IS WINDING DOWN FAST AT THIS TIME SO NO TSRA IN TAFS. I EXPECT THE MAIN BATCH OF SHRA TO PULL OUT BETWEEN 10 AND 14Z AND THEN THERE WILL BE LEFT OVER PATCHY -SHRA AND MAINLY VFR CONDITIONS. I KEPT KBGM DOWN AT MVFR UNTIL 18Z AFTER THE MAIN SHRA END DUE TO THE ELEVATION. CONDITIONS WILL IMPROVE TO A SCT- BKN 5000 FEET LAYER IN THE MIOST TERMINALS AND JUST PATCHY CUMULUS AND MID CLOUDS FOR KSYR AND KELM FOR WED PM. WINDS WILL BE VARIABLE OVERNIGHT AND LIGHT...TURNING LIGHT WESTERLY BY WED PM. .OUTLOOK... TUE NGT...SCATTERED MVFR SHRA. WED/THU/...VFR FRI/SAT...CHANCE OF SCATTERED MVFR SHRA/TSRA && .BGM WATCHES/WARNINGS/ADVISORIES... PA...NONE. NY...NONE. && SYNOPSIS...MDP NEAR TERM...CMG/MDP SHORT TERM...MDP LONG TERM...KAH AVIATION...DJN
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BINGHAMTON NY 337 PM EDT MON JUL 22 2013 NYZ009-015>018-022>025-036-037-044>046-055>057-062-PAZ038>040-043- 044-047-048-072-231945- NORTHERN ONEIDA-YATES-SENECA-SOUTHERN CAYUGA-ONONDAGA-STEUBEN- SCHUYLER-CHEMUNG-TOMPKINS-MADISON-SOUTHERN ONEIDA-CORTLAND-CHENANGO- OTSEGO-TIOGA-BROOME-DELAWARE-SULLIVAN-BRADFORD-SUSQUEHANNA- NORTHERN WAYNE-WYOMING-LACKAWANNA-LUZERNE-PIKE-SOUTHERN WAYNE- 337 PM EDT MON JUL 22 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW YORK...SOUTHEASTERN NEW YORK AND NORTHEAST PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TONIGHT THROUGH TUESDAY MORNING...BUT NONE WILL BE SEVERE. HOWEVER...THE HEAVIEST CELLS MAY CAUSE MINOR WATER PROBLEMS IN AREAS OF POOR DRAINAGE SUCH AS URBANIZED AREAS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
648 PM EDT MON JUL 22 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0617 PM HEAVY RAIN CHENANGO FORKS 42.23N 75.87W
07/22/2013 M2.50 INCH BROOME NY TRAINED SPOTTER
RAIN FELL IN 52 MINUTES
&&
PNPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
719 PM EDT MON JUL 22 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0717 PM FLOOD AFTON 42.23N 75.53W
07/22/2013 CHENANGO NY TRAINED SPOTTER
ONE INCH OF WATER FLOWING ACROSS SPRING STREET AND
OVERTOPPING CURBS
&&
PNPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
734 PM EDT MON JUL 22 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0731 PM HEAVY RAIN CHENANGO FORKS 42.23N 75.87W
07/22/2013 M1.60 INCH BROOME NY TRAINED SPOTTER
FELL IN 1.5 HOURS.
&&
PNPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
827 PM EDT MON JUL 22 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0825 PM HEAVY RAIN ONEONTA 42.45N 75.07W
07/22/2013 M1.00 INCH OTSEGO NY TRAINED SPOTTER
FELL IN ONE HOUR
&&
PNPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
835 PM EDT MON JUL 22 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0834 PM HEAVY RAIN 1 NE ONEONTA 42.46N 75.06W
07/22/2013 M2.00 INCH OTSEGO NY TRAINED SPOTTER
FELL IN APPOXIMATELY 15 MINUTES
&&
PNPRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE BINGHAMTON NY
849 PM EDT MON JUL 22 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0834 PM HEAVY RAIN 1 NE ONEONTA 42.46N 75.06W
07/22/2013 M1.00 INCH OTSEGO NY TRAINED SPOTTER
FELL IN APPOXIMATELY 15 MINUTES. STORM TOTAL 2.00
INCHES IN ONE HOUR AND 15 MINUTES.
&&
CORRECTED EVENT...REMARKS
PNThe Binghamton radar (KBGM), 79 km away, was scanning. The volume nearest the first event began at 00:53 UTC.
2 flash flood. Local standard time, as filed.
Heavy rainfall caused extensive urban and storm drain flash flooding throughout the City of Oneonta. Cars and people were stranded on local roadways.
Area roads were severely flooded. Oneonta City Hall was flooded.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2013Every state in 2013This day in weather historyWarnings in New York, July 2013
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: 468727, 468728.