Showers and thunderstorms will heavy rainfall developed across parts of central New York. Some of the storms occurred in areas that had already received heavy rainfall the previous day.
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.
Showers and thunderstorms will heavy rainfall developed across parts of central New York. Some of the storms occurred in areas that had already received heavy rainfall the previous day. Flooding of roads and small streams developed, especially in parts of Chenango, Oneida and Broome counties.
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 Jun 23, 3:49 AM EST, 1 hour 36 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BINGHAMTON NY 449 AM EDT THU JUN 23 2011 .SYNOPSIS... A LARGE LOW PRESSURE AREA OVER THE GREAT LAKES WILL KEEP A SOUTHERLY FLOW OF MOIST AN UNSTABLE AIR IN THE AREA THROUGH FRIDAY. THIS FLOW OF AIR WILL TRIGGER SHOWERS AND THUNDERSTORMS AT TIMES ACROSS THE AREA THROUGH THE END OF THE WEEK. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... RADAR SHOWING A LINE OF STORMS MOVING INTO THE WESTERN ZONES THIS MORNING. THIS LINE IS ASSOCIATED WITH A TROUGH THAT IS ROTATING AROUND THE LOW PRESSURE SYSTEM SITTING OVER THE WESTERN GREAT LAKES. THIS LINE WILL CONTINUE ACROSS THE CWA THROUGH THE MORNING AND POSSIBLY AFTERNOON HOURS. BEHIND THIS LINE, THERE WILL BE SOME INSTABILITY. THE QUESTION IS HOW MUCH. CAPE VALUES IN THE AFTERNOON LOOK TO BE ONLY AROUND 500 JOULES. ALSO, THE NCAPE IS LESS THAN .1 TODAY. BUFKIT SOUNDINGS SHOW SOME INVERSION AT SEVERAL LEVELS TODAY AS WELL. HOWEVER, THE 0-6KM BULK SHEAR LOOKS TO BE AROUND 45 KTS. SO, NOT EXPECTING WIDE SPREAD STORMS THIS AFTERNOON, BUT IF A FEW DO GO, THEY DO HAVE THE POTENTIAL TO BECOME SEVERE. && .SHORT TERM /6 PM THIS EVENING THROUGH SATURDAY NIGHT/... THIS EVENING WILL SEE AN INCREASE IN THE CHANCE FOR SHOWERS AND THUNDERSTORMS. CAPE VALUES GO TO OVER 1000 JOULES AND POSSIBLY NEAR 1500 JOULES. THE NCAPE STILL IS AROUND .1, SO A TALL SKINNY CAPE. LAPSE RATES ARE NOT IMPRESSIVE AT ALL. 950-500 ARE ONLY AROUND 6. SO AGAIN, CONFIDENCE IS LOW FOR SEVERE WEATHER THIS EVENING. LOOKING AT THE MBE VELOCITY, THEY DO DROP OVER NIGHT TONIGHT TO BELOW 10KTS. PWATS WILL BE OVER AN INCH AND THREE QUARTERS AS WELL. SO THINKING STRONG STORMS MAY DEVELOP IN EARLY EVENING AND THAN TRANSITION OVER TO HEAVY RAINERS IN THE LATE EVENING. THE SOUNDINGS DO SHOW THE PWATS DROPPING SIGNIFICANTLY AFTER MIDNIGHT FROM WEST TO EAST. FOR FRIDAY, JUST ANOTHER ROUND OF SHOWERS AND STORMS WILL DEVELOP ON THE AFTERNOON. THIS WILL BE AHEAD OF A COLD FRONT ASSOCIATED WITH THE LOW, WHICH WILL BE CENTERED JUST NORTH EAST OF MICHIGAN THURSDAY NIGHT. THIS FRONT COULD TRIGGER SOME STRONG THUNDERSTORMS AS WELL AS SOME SEVERE. BY SATURDAY, THE FRONT WILL HAVE MOVED THROUGH, BUT THE LOW IS SLOW MOVING AND THERE WILL BE SOME LINGERING MOISTURE AND WEAK INSTABILITY. THIS WILL PROBABLY RESULT IN A CHANCE OF SHOWERS ON SATURDAY. THESE WILL BEGIN TO DIMINISH SATURDAY NIGHT. && .LONG TERM /SUNDAY THROUGH WEDNESDAY/... UPDATED AT 215 PM... FOLLOWED HPC GUIDANCE CLOSELY DURING THIS PERIOD. UPPER LEVEL LONG WAVE TROF SLOWLY EXITING OFF THE EAST COAST SUNDAY WITH A WEAK COLD FRONT MOVING SOUTHEAST ACROSS NEW ENGLAND AND NY. HIGH PRESSURE BUILDS IN MONDAY WITH AN UPPER LEVEL RIDGE TO THE WEST. SHORTWAVE TUESDAY MAY HELP TRIGGER AN AFTERNOON SHOWER OR THUNDERSTORM. LOW PRESSURE MOVES UP THE OHIO VALLE INTO WESTERN PA AND NY ON WEDNESDAY MAY BRING SCATTERED SHOWERS. && .AVIATION /08Z THURSDAY THROUGH MONDAY/... UPDATED AS OF 155 AM THU... OCCASIONAL MVFR RESTRICTIONS OVERNIGHT IN BR/HZ AT KITH/KBGM/KAVP. FOR KELM...BRIEF PERIODS OF IFR BR POSSIBLE. AT KRME/KSYR...LOWER CLOUDS...WITH OCNL IFR CIG BASES...WILL PERSIST UNTIL ARND 12Z THU. A BIG WILD CARD EARLY THIS MRNG WILL BE POTENTIAL SHRA/TSRA ACTIVITY. CONVECTIVE ACTIVITY IN WRN NY AND WRN/CNTRL PA AS OF 06Z...IS EXPECTED TO WEAKEN WITH EWD EXTENT. THUS...FOR NOW...HAVE LEFT ANY MENTION OF SHRA/TSRA OUT OF THE TERMINALS IN THE NEAR TERM...BUT IT MAY NEED TO BE INSERTED...ON A SITE BY SITE BASIS...DEPENDING ON RADAR TRENDS. A BETTER CHANCE OF SHRA/TSRA IS EXPECTED THIS AFTN...GENERALLY AFTER 18Z. AS A RESULT...WE'LL CONTINUE TO CARRY CB GROUPS AREA- WIDE AT THIS PT. LATER FORECASTS WILL LIKELY NEED TO ADD A MORE STRICT MENTION OF SHRA/TSRA. AFTER 00Z FRI...MVFR RESTRICTIONS IN BR/HZ AGAIN ANTICIPATED. OUTLOOK... FRIDAY THROUGH SATURDAY...PERIODS OF MVFR...IN SCATTERED TO WIDESPREAD SHOWERS AND THUNDERSTORMS. SUNDAY AND MONDAY...VFR. && .BGM WATCHES/WARNINGS/ADVISORIES... PA...NONE. NY...NONE. && SYNOPSIS...SLI NEAR TERM...SLI SHORT TERM...SLI LONG TERM...BMW AVIATION...HEDEN/MLJ
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BINGHAMTON NY 410 AM EDT THU JUN 23 2011 NYZ009-015>018-022>025-036-037-044>046-055>057-062-PAZ038>040-043- 044-047-048-072-240815- 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- 410 AM EDT THU JUN 23 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW YORK...SOUTHEASTERN NEW YORK AND NORTHEAST PENNSYLVANIA. .DAY ONE...TODAY AND TONIGHT. ABUNDANT MOISTURE AND INSTABILITY IS OVER THE AREA TODAY. THERE IS A SLIGHT CHANCE OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING. THE MAIN THREATS ARE DAMAGING CONVECTIVE WIND GUSTS AND LARGE HAIL. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. THUNDERSTORMS WILL CONTINUE TO BE A THREAT INTO FRIDAY...WITH THE SLIGHT CHANCE OF SEVERE THUNDERSTORMS WITH DAMAGING WINDS AND LARGE HAIL. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BINGHAMTON NY
451 AM EDT THU JUN 23 2011
NYZ015-022-023-230945-
SCHUYLER NY-STEUBEN NY-YATES NY-
451 AM EDT THU JUN 23 2011
...LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHEASTERN YATES...
STEUBEN AND WESTERN SCHUYLER COUNTIES...
* AT 445 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF STRONG THUNDERSTORMS CAPABLE OF PRODUCING SMALL HAIL...
GUSTY WINDS TO AROUND 40 MPH...AND VERY HEAVY RAIN. THESE
STORMS WERE LOCATED ALONG A LINE EXTENDING FROM COHOCTON TO
HOWARD TO 8 MILES NORTHWEST OF JASPER...AND MOVING EAST AT 25 MPH.
* STRONG THUNDERSTORMS WILL BE NEAR...
AVOCA AT 455 AM EDT...
JASPER AT 500 AM EDT...
WHEELER AND WEST CAMERON AT 505 AM EDT...
PRATTSBURG AND CAMERON AT 510 AM EDT...
WOODHULL AND NORTH CAMERON AT 515 AM EDT...
RHEIMS AND HAMMONDSPORT AT 520 AM EDT...
PULTENEY AND URBANA AT 525 AM EDT...
THURSTON AND SAVONA AT 530 AM EDT...
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!
LAT...LON 4258 7689 4254 7689 4254 7681 4230 7680
4228 7697 4200 7697 4200 7754 4257 7755
/MLJSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BINGHAMTON NY
520 AM EDT THU JUN 23 2011
PAZ043-044-047-231015-
LACKAWANNA PA-LUZERNE PA-WYOMING PA-
520 AM EDT THU JUN 23 2011
...STRONG THUNDERSTORM WILL AFFECT LACKAWANNA...NORTHERN LUZERNE AND
WYOMING COUNTIES...
* AT 519 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CAPABLE OF PRODUCING SMALL HAIL...AND VERY
HEAVY RAIN. THIS STORM WAS LOCATED NEAR SWEET VALLEY...AND MOVING
NORTHEAST AT 30 MPH.
* THE STRONG THUNDERSTORM WILL BE NEAR...
STULL AND LEHMAN AT 530 AM EDT...
HARVEYS LAKE AND RUGGLES AT 535 AM EDT...
BEAUMONT AND FERN BROOK AT 540 AM EDT...
VERNON AND SWOYERSVILLE AT 545 AM EDT...
CENTER MORELAND AND ORANGE AT 550 AM EDT...
FALLS AND RANSOM AT 555 AM EDT...
MILL CITY AND LAKE WINOLA AT 600 AM EDT...
WALLS CORNERS AND OLD FORGE AT 605 AM EDT...
THIS STORM HAS THE POTENTIAL TO BECOME SEVERE AND PRODUCE LARGE HAIL
AND/OR DAMAGING WINDS.
LAT...LON 4121 7633 4129 7632 4144 7626 4165 7579
4164 7546 4139 7545 4116 7630
SLISPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BINGHAMTON NY
534 AM EDT THU JUN 23 2011
NYZ015>017-022>025-055-231030-
CAYUGA NY-CHEMUNG NY-SCHUYLER NY-SENECA NY-STEUBEN NY-TIOGA
NY-TOMPKINS NY-YATES NY-
534 AM EDT THU JUN 23 2011
...LINE OF STRONG THUNDERSTORMS WILL AFFECT EAST CENTRAL STEUBEN...
EASTERN YATES...NORTHERN CHEMUNG...NORTHERN TIOGA...SCHUYLER...
SOUTHERN CAYUGA...SOUTHERN SENECA AND TOMPKINS COUNTIES...
* AT 531 AM 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 PENN YAN TO HIMROD TO READING
CENTER TO MONTEREY...AND MOVING EAST AT 35 MPH.
* STRONG THUNDERSTORMS WILL BE NEAR...
TOWNSEND AND HECTOR AT 540 AM EDT...
KENDAIA AND WILLARD AT 545 AM EDT...
ROMULUS AND TOWNSENDVILLE AT 550 AM EDT...
HAYTS CORNERS AND EAST VARICK AT 555 AM EDT...
WILLETS AND AURORA AT 600 AM EDT...
LEDYARD AND WILLOW CREEK AT 605 AM EDT...
VENICE CENTER AND NEWFIELD HAMLET AT 610 AM EDT...
WEST GROTON AND WEST DRYDEN AT 615 AM EDT...
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!
LAT...LON 4246 7707 4259 7709 4276 7717 4277 7699
4278 7698 4279 7628 4241 7625 4241 7613
4235 7611 4226 7617 4225 7720
/MLJSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BINGHAMTON NY
625 AM EDT THU JUN 23 2011
NYZ017-018-025-036-044-045-231115-
CAYUGA NY-CHENANGO NY-CORTLAND NY-MADISON NY-ONONDAGA NY-TOMPKINS NY-
625 AM EDT THU JUN 23 2011
...LINE OF STRONG THUNDERSTORMS WILL AFFECT CORTLAND...MADISON...
NORTHERN CHENANGO...SOUTHEASTERN CAYUGA...SOUTHERN ONONDAGA AND
TOMPKINS COUNTIES...
* AT 622 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF STRONG THUNDERSTORMS CAPABLE OF PRODUCING SMALL HAIL...
STRONG GUSTY WINDS OF 40 TO 50 MPH...AND VERY HEAVY RAIN. THESE
STORMS WERE LOCATED ALONG A LINE EXTENDING FROM NILES TO
KELLOGGSVILLE TO GROTON TO FREEVILLE TO ITHACA...AND MOVING
EAST AT 45 MPH.
* STRONG THUNDERSTORMS WILL BE NEAR...
WEST SLATERVILLE AND SOUTH CORTLAND AT 630 AM EDT...
CEDARVALE AND ONONDAGA AT 635 AM EDT...
NEDROW AND TULLY AT 640 AM EDT...
JAMESVILLE AND TRUXTON AT 645 AM EDT...
WATERVALE AND MANLIUS AT 650 AM EDT...
ORAN AND UNION VALLEY AT 655 AM EDT...
TEXAS VALLEY AND SOUTH OTSELIC AT 700 AM EDT...
PERRYVILLE AND WILLET AT 705 AM EDT...
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!
LAT...LON 4304 7559 4303 7555 4293 7554 4293 7545
4286 7544 4287 7529 4275 7529 4268 7533
4263 7532 4246 7550 4241 7597 4241 7626
4240 7630 4237 7626 4233 7665 4250 7648
4261 7644 4297 7651 4307 7562
/MLJThe Binghamton radar (KBGM), 46 km away, was scanning. The volume nearest the first event began at 10:27 UTC.
2 flash flood, 1 thunderstorm wind. Local standard time, as filed.
A large tree was blown down on wires, partially blocking Route 366.
Heavy rain caused significant flash flooding in several areas of the county. In Greene, there were many reports of roads flooding, and flooding of homes in the Village of Greene, with evacuations of homes along Birdsall Creek. Multiple reports were received of streams flooding roads in Coventry. In Bainbridge, parts of downtown were flooded, and water over roads caused damage to infrastructure.
Heavy rain caused flash flooding in several locations. Near Itaska, water and rocks crossed Barker Road, and over Route 79 near Bull Creek Road. In Chenango Forks, flooding occurred along Cloverdale Road, with swift water rescues taking place. Also, a mudslide was reported in the town of Chenango near Chenango Forks.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2011Every state in 2011This day in weather historyWarnings in New York, June 2011
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: 321178, 321153, 321180.