An upper level disturbance moved along a stationary front and produced numerous, slow moving clusters of thunderstorms across Central New York. This resulted in several areas of significant flash flooding around the region.
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 episode as NWS BGM wrote it up.
An upper level disturbance moved along a stationary front and produced numerous, slow moving clusters of thunderstorms across Central New York. This resulted in several areas of significant flash flooding around the region.
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 8, 7:01 PM EST, 42 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BINGHAMTON NY 801 PM EDT THU AUG 8 2013 .SYNOPSIS... A SLOW MOVING COLD FRONT WILL EVENTUALLY MOVE PAST THE REGION ON FRIDAY NIGHT. IN THE MEANTIME...CHANCES FOR PERIODIC SHOWERS AND A THUNDERSTORM OR TWO WILL CONTINUE THROUGH FRIDAY EVENING. LOCALLY HEAVY RAIN IS POSSIBLE IN ANY STORMS THAT FORM. A DRIER WEEKEND IS IN STORE WITH TEMPERATURES REMAINING ON THE COOLER SIDE OF NORMAL FOR AUGUST. && .NEAR TERM /UNTIL 6 AM FRIDAY MORNING/... 300 PM UPDATE... A COLD FRONT ACROSS WESTERN NY NOW WILL ACT MORE LIKE A STATIONARY FRONT OVERNIGHT MAKING LITTLE IF ANY PROGRESS FARTHER EAST. MEANWHILE A BROAD SOUTHWESTERLY FLOW ALOFT WILL CONTINUE TO PUMP IN AMPLE AMOUNTS OF MOISTURE INTO OUR AREA THROUGH TONIGHT. SO FAR COVERAGE HAS BEEN VERY SCATTERED WITH STORMS FIRING OVER WNY AHEAD OF THE FRONT AND ALONG A LAKE BREEZE BOUNDARY. CONVECTION IN OUR AREA MOVING THROUGH THE CATSKILLS NOW...LIKELY FORMED ON THE OUTFLOW FROM EARLIER STORMS TODAY. LOOKING UPSTREAM CONVECTION IS MORE PLENTIFUL OVER SW PA AND WV. BASED ON THIS...OUR SW FLOW ALOFT...AND INCREASING MOISTURE OVERNIGHT...CONTINUED TO RAMP UP POPS FROM CHANCE THIS AFTERNOON TO LIKELY OVERNIGHT. SEVERE THREAT LOOKS ISOLATED AND JUST CONFINE TO NOW THROUGH EARLY EVENING. MAINLY PULSE STORMS ARE EXPECTED WITH A BRIEF LARGE HAIL/DAMAGING WIND THREAT. CONFIDENCE IN THIS SCENARIO IS ABOVE AVERAGE GIVEN NATURE OF THE STORMS THAT HAVE FORMED THUS FAR WITH VERY HIGH CORES ALOFT NOT LASTING MUCH MORE THAN A FEW VOLUME SCANS. THIS IS LIKELY DUE TO MINIMAL SHEAR (30 KTS OR LESS) BETWEEN 0-6 KM BUT MODEST CAPES (ABOVE 2,000 J/KG). A LARGER THREAT OVERNIGHT WILL BE THE POSSIBILITY OF LOCALLY HEAVY RAIN AS PWATS INCREASE TO NEAR 2 INCHES BY 12Z FRIDAY. WILL HIGHLIGHT IN THE HWO NOW WITHOUT ENOUGH CONFIDENCE TO FOCUS INTO ANY SPECIFIC AREA. IT SHOULD BE WORTH NOTING THE HRRR/ARW AND NMM DO SHOW AN AREA OF SHOWERS OVER WVA NOW EVOLVING INTO AN AREA OF HEAVIER RAIN BETWEEN 06Z AND 12Z OVER NEPA. && .SHORT TERM /6 AM FRIDAY MORNING THROUGH SUNDAY/... 300 PM UPDATE... THE STATIONARY FRONT MENTIONED ABOVE WILL FINALLY BEGIN TO MOVE EAST AS A COLD FRONT DURING THE DAY. CHANCES FOR SHOWERS AND THUNDER WILL EXIST EVERYWHERE THROUGH EARLY AFTERNOON BEFORE FOCUSING ON NEPA AND THE CATSKILLS BY LATE AFTERNOON AS THE FRONT MAKES PROGRESSION THROUGH THE AREA. LOCALLY HEAVY RAIN IS STILL POSSIBLE ESPECIALLY IN NEPA WITH PWATS NEAR 2 INCHES. BEHIND THE FRONT MUCH DRIER AIR WORKS IN FRIDAY NIGHT INTO SATURDAY. THE WEEKEND LOOKS GREAT WITH PARTLY TO MOSTLY SUNNY SKIES AND HIGHS IN THE 70S. && .LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/... 2 PM UPDATE... MED RANGE MODELS IN FAIR AGREEMENT THRU THE LONG TERM. MODELS ADVERTISING FROPA BEGINNING MON NGT AND THRU MOST OF THE AREA ON TUESDAY, THUS HV POPS FOR THIS TIME PD. SHOWERS AND TSTMS EXPECTED DRG THE AFTN HRS. 1020MB SFC HIGH WL BUILD IN AND LV DRY WX THRU THE REST OF THE PD. TEMPS WL BE RUNNING BLO NORMAL THRU MID-WEEK. && .AVIATION /00Z FRIDAY THROUGH TUESDAY/... ON GOING CONV THIS EVE WILL SLOWLY DIMINSH TWRDS MIDN...BUT MVFR CIGS AND VSBYS WILL CONT THRU MUCH OF THE NGT WITH THE LEFTOVER MOISTURE. BNDRY FNLY MAKES A PUSH TO THE SE ON FRI,,,BUT NOT BEFORE SOME PCPN AND CONTD LWRD CIGS AND VSBY...ESP OVER THE CNTRL AND SRN TAF SITES. CLRG BEGINS LATE IN THE TAF PD...BEGINNING IN THE WRN SITES IN THE AFTN. OUTLOOK... SAT THRU MON...VFR. MON NGT/TUE...MVFR RESTRICTION IN SHRA/TSRA. && .BGM WATCHES/WARNINGS/ADVISORIES... PA...NONE. NY...NONE. && SYNOPSIS...HEDEN NEAR TERM...HEDEN SHORT TERM...HEDEN LONG TERM...PVN AVIATION...DGM/PVN
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BINGHAMTON NY 300 PM EDT THU AUG 8 2013 NYZ009-015>018-022>025-036-037-044>046-055-056-PAZ038-091900- NORTHERN ONEIDA-YATES-SENECA-SOUTHERN CAYUGA-ONONDAGA-STEUBEN- SCHUYLER-CHEMUNG-TOMPKINS-MADISON-SOUTHERN ONEIDA-CORTLAND-CHENANGO- OTSEGO-TIOGA-BROOME-BRADFORD- 300 PM EDT THU AUG 8 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW YORK AND NORTHEAST PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. SHOWERS AND THUNDERSTORMS ARE POSSIBLE THROUGH TONIGHT. THE MAIN THREAT WILL BE LOCALLY HEAVY RAIN. MINOR FLOODING OF POOR DRAINAGE...URBAN..AND LOW LYING AREAS IS POSSIBLE. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. HEDEN NYZ057-062-PAZ039-040-043-044-047-048-072-091900- DELAWARE-SULLIVAN-SUSQUEHANNA-NORTHERN WAYNE-WYOMING-LACKAWANNA- LUZERNE-PIKE-SOUTHERN WAYNE- 300 PM EDT THU AUG 8 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW YORK...SOUTHEASTERN NEW YORK AND NORTHEAST PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. SHOWERS AND THUNDERSTORMS ARE POSSIBLE THROUGH TONIGHT. THE MAIN THREAT WILL BE LOCALLY HEAVY RAIN. MINOR FLOODING OF POOR DRAINAGE...URBAN..AND LOW LYING AREAS IS POSSIBLE. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. THROUGH FRIDAY AFTERNOON SHOWERS AND THUNDERSTORMS ARE STILL POSSIBLE. THE MAIN THREAT WILL CONTINUE TO BE LOCALLY HEAVY RAIN. MINOR FLOODING OF POOR DRAINAGE...URBAN..AND LOW LYING AREAS IS POSSIBLE. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. HEDEN
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BINGHAMTON NY
646 PM EDT THU AUG 8 2013
NYZ017-018-025-044-082345-
CAYUGA NY-CORTLAND NY-ONONDAGA NY-TOMPKINS NY-
646 PM EDT THU AUG 8 2013
...LINE OF STRONG THUNDERSTORMS WILL AFFECT CORTLAND...NORTHEASTERN
TOMPKINS...SOUTHEASTERN CAYUGA AND SOUTHEASTERN ONONDAGA COUNTIES...
* AT 636 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF STRONG THUNDERSTORMS CAPABLE OF PRODUCING SMALL HAIL...
STRONG GUSTY WINDS...AND VERY HEAVY RAIN. THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM MORAVIA TO GROTON...AND MOVING
EAST AT 15 MPH.
* STRONG THUNDERSTORMS WILL BE NEAR...
KELLOGGSVILLE AND NEW HOPE AT 650 PM EDT...
SEMPRONIUS AND DRESSERVILLE AT 655 PM EDT...
DRYDEN AT 700 PM EDT...
GLEN HAVEN AND COMO AT 705 PM EDT...
SCOTT AND GRACIE AT 710 PM EDT...
SOUTH CORTLAND AND CORTLAND WEST AT 715 PM EDT...
VIRGIL AND MUNSONS CORNERS AT 720 PM EDT...
VESPER AND CORTLAND AT 725 PM EDT...
* OTHER LOCATIONS INCLUDE BUT ARE NOT LIMITED TO PERUVILLE...
GROTON...FREEVILLE...MC LEAN...NUBIA...HOMER...PREBLE...
BALTIMORE...EAST HOMER...TULLY...MCGRAW...MCGRAW...FABIUS...
APULIA...TRUXTON...TRIPOLI...SOLON...KEENEY...FREETOWN CORNERS...
EAST FREETOWN AND CUYLER.
THESE STORMS HAVE THE POTENTIAL TO BECOME SEVERE AND PRODUCE LARGE
HAIL AND/OR DAMAGING WINDS.
FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE
INDOORS IMMEDIATELY!
THESE STORMS HAVE THE POTENTIAL TO PRODUCE VERY HEAVY RAIN...AND
COULD CAUSE LOCALIZED FLOODING OF ROADS AND POOR DRAINAGE AREAS.
RADAR RAINFALL ESTIMATES ARE 1 TO 2 INCHES IN AN HOUR.
LAT...LON 4281 7590 4280 7589 4274 7589 4273 7589
4251 7589 4246 7650 4281 7649 4285 7590
TACSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BINGHAMTON NY
651 PM EDT THU AUG 8 2013
NYZ015-016-023-025-082330-
SCHUYLER NY-SENECA NY-TOMPKINS NY-YATES NY-
651 PM EDT THU AUG 8 2013
...STRONG THUNDERSTORM WILL AFFECT SCHUYLER...SOUTHEASTERN SENECA...
SOUTHEASTERN YATES AND WESTERN TOMPKINS COUNTIES...
* AT 649 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM. THIS STORM WAS LOCATED NEAR TYRONE...AND
MOVING EAST AT 25 MPH.
* THE STRONG THUNDERSTORM WILL BE NEAR...
DUNDEE AND TOWNSEND AT 700 PM EDT...
GLENORA AND ROCK STREAM AT 705 PM EDT...
WATKINS GLEN AND WATKINS GLEN STATE PARK AT 710 PM EDT...
HECTOR AND LOGAN AT 715 PM EDT...
BENNETTSBURG AT 720 PM EDT...
SEARSBURG AND EAST STEAMBURG AT 725 PM EDT...
PERRY CITY AND MECKLENBURG AT 730 PM EDT...
THIS STORM HAS THE POTENTIAL TO BECOME SEVERE AND PRODUCE LARGE HAIL
AND/OR DAMAGING WINDS.
FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE
INDOORS IMMEDIATELY!
IF ON OR NEAR SOUTHERN SENECA LAKE...SEEK SHELTER NOW. GET OUT OF
THE WATER AND MOVE INDOORS OR INSIDE A VEHICLE.
LAT...LON 4256 7715 4263 7667 4262 7661 4263 7655
4237 7653 4232 7710 4250 7711 4250 7715
DGMPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
728 PM EDT THU AUG 08 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0705 PM HAIL GROTON 42.59N 76.37W
08/08/2013 E0.75 INCH TOMPKINS NY FACEBOOK
&&
JMLPRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE BINGHAMTON NY
754 PM EDT THU AUG 08 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0143 PM HAIL JEFFERSONVILLE 41.78N 74.93W
08/08/2013 M0.88 INCH SULLIVAN NY PUBLIC
0155 PM TSTM WND DMG JEFFERSONVILLE 41.78N 74.93W
08/08/2013 SULLIVAN NY 911 CALL CENTER
TWO TREES DOWN ACROSS A ROAD
0458 PM HEAVY RAIN 1 W BENTON 42.73N 77.08W
08/08/2013 M2.00 INCH YATES NY TRAINED SPOTTER
LESS THAN ONE HOUR
0539 PM HEAVY RAIN 1 E VOAK 42.73N 77.12W
08/08/2013 M1.38 INCH YATES NY TRAINED SPOTTER
0705 PM HAIL GROTON 42.59N 76.37W
08/08/2013 E0.75 INCH TOMPKINS NY FACEBOOK
0751 PM HEAVY RAIN DRYDEN 42.49N 76.30W
08/08/2013 M1.25 INCH TOMPKINS NY TRAINED SPOTTER
LAST 20 MINUTES
&&
JMLPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
803 PM EDT THU AUG 08 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0715 PM TSTM WND DMG GROTON 42.59N 76.37W
08/08/2013 TOMPKINS NY 911 CALL CENTER
SEVERAL TREES DOWN
&&
JMLPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
807 PM EDT THU AUG 08 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0730 PM TSTM WND DMG 2 SW VIRGIL 42.50N 76.21W
08/08/2013 CORTLAND NY 911 CALL CENTER
SOME TREES AND WIRES DOWN. MINOR ROAD FLOODING
&&
JMLThe Binghamton radar (KBGM), 53 km away, was scanning. The volume nearest the first event began at 00:44 UTC.
16 flash flood. Local standard time, as filed.
Water was reported to be running across Route 89 from near Taughannock Falls, southward to Ithaca. One foot of water and debris was across the road in spots.
Harvey Hill Road and Fish Road were closed due to flooding.
Significant flooding was reported in Cortlandville.
A bridge was washed out at the intersection of Harvey Hill Road and State Route 327.
Flood waters covered numerous roads in the area, especially along Routes 96 and 89 to the north of Ithaca.
Extensive flooding was reported along State Route 414. Water was covering roads in several areas and was into houses.
Severe flooding was reported in Cortlandville within the Walmart parking lot. People were trapped on top of their vehicles and rescued by emergency personnel.
Major flash flooding was reported in Millport with several roads washed away.
Significant flooding was reported on Route 414 near the Steuben and Chemung county line. People were rescued from the roof of a car, and a nearby campground was evacuated.
Serious flash flooding was reported in the area with 120 people currently being evacuated to Red Cross shelters.
There were several road closures in the area due to flooding.
Water was rushing over McLean Road near the SPCA.
Post Creek was flooding, and threatening the Ferenbaugh Campground. Camp residents were being evacuated along Route 414.
Significant flash flooding was occurring with Sing Sing Road underwater near the airport.
Major flash flooding of the Mini Mart was reported near the village of Beaver Dams.
Catatonk Creek overflowed its banks and washed out a bridge.
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, August 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: 470301, 470303, 470304, 470305, 470306, 470310, 470311, 470312, 470314, 470315, 470316, 470319, 470320, 470321, 470322, 470324.