An upper level disturbance allowed thunderstorms to develop during the evening hours. A storm tracking northeast out of northern Pennsylvania resulted in an EF1 tornado in Steuben County 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.
An upper level disturbance allowed thunderstorms to develop during the evening hours. A storm tracking northeast out of northern Pennsylvania resulted in an EF1 tornado in Steuben County 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 27, 2:26 PM EST, 2 hours 44 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BINGHAMTON NY 326 PM EDT SAT JUL 27 2013 .SYNOPSIS... AN AREA OF LOW PRESSURE OVER THE WESTERN GREAT LAKES WILL DRAG A COLD FRONT ACROSS THE AREA SUNDAY NIGHT. AHEAD OF THIS FRONT SHOWERS AND THUNDERSTORMS WILL CONTINUE TONIGHT BEFORE ENDING SUNDAY NIGHT WITH THE PASSAGE OF THE FRONT. COOLER AND DRIER WEATHER WILL BUILD INTO THE REGION MONDAY. && .NEAR TERM /UNTIL 6 AM SUNDAY MORNING/... 300 PM UPDATE... DISCRETE CELLS HAVE BEGUN TO POP OVER NORTH CENTRAL PA AND NOW THROUGH THE FINGER LAKES. WITH SBCAPES NEAR 1000 J/KG AND A WELL DEFINED SHORT WAVE OVER WESTERN PA...EXPECT THE COVERAGE TO INCREASE THROUGH 0Z. WITH A GENERAL MOVEMENT TO THE NORTH- NORTHEAST...MODEL GUIDANCE FROM THE PAST 48 HOURS SEEMS TO BE ON TRACK WITH A MAIN RISK BEING ALONG AND WEST OF I-81 THROUGH 0Z. WITH 0-6 KM BULK SHEAR VALUES OF 35 KTS...THE CONVECTIVE MODE MAY EVOLVE FROM DISCRETE SHOWERS NOW...TO A LINEAR LINE OVER THE NEXT FEW HOURS...ESPECIALLY THROUGH THE FINGER LAKES. ISOLATED WIND THREAT STILL EXISTS BUT WEAK LAPSE RATES...MOIST MID LEVELS...AND LESS THAN IMPRESSIVE MID LEVEL WINDS TO TAP INTO. WHILE NOT EXPECTED TO BE A WIDESPREAD HEAVY RAIN EVENT...WITH PWATS APPROACHING 1.6 INCHES AND A SIGNAL THAT STORMS MAY TRAIN A BIT (SOUTH TO NORTH)...LOCALIZED HEAVY RAIN REMAINS THE MOST LIKELY THREAT. WILL CONTINUE TO HIGHLIGHT THIS POTENTIAL IN THE HWO FOR AREAS ALONG AND WEST OF I-81. AS THE SHORT WAVE MOVES THROUGH LATER TONIGHT PRECIP CHANCES LOOK TO GO DOWN A BIT WITH THE LOSS OF UPPER LEVEL SUPPORT. HOWEVER WITH A COLD FRONT JUST ENTERING WESTERN NY AND A MOIST ATMOSPHERE AHEAD OF IT...FELT IT WAS BEST TO KEEP THE INHERITED POPS OF HIGH CHANCE TO LOW LIKELY. && .SHORT TERM /6 AM SUNDAY MORNING THROUGH MONDAY/... 300 PM UPDATE... SUNDAY...THE COLD FRONT MENTIONED ABOVE WILL MOVE THROUGH LATER IN THE DAY...AT A VERY SLOW PACE. BOTH THE NAM AND GFS HAVE SLOWED DOWN A BIT FROM PREVIOUS RUNS BUT STILL HAVE THE IDEA OF SHOWERS AND STORMS FOR ANYBODY THROUGHOUT THE DAY...BUT THEN THE HIGHEST RISK SHIFTING EAST OF I-81 AFTER 21Z. SEVERE POTENTIAL EXISTS WITH GOOD SHEAR (0-6 BULK SHEAR 45 KTS) AND MUCH STRONGER LAPSE RATES THAN TODAY. LIMITING POTENTIAL WILL BE INSTABILITY WITH CAPES AROUND 500 J/KG. HIGHEST THREAT WILL BE EAST OF I-81 WHERE THE BEST CHANCE FOR MAXIMUM HEATING WILL OCCUR. A GOOD DEPICTION OF WHAT MAY HAPPEN ACROSS OUR AREA TOMORROW IS HAPPENING NOW OVER LOWER MICHIGAN. AS OF NOW NO SEVERE WARNINGS ISSUED YET BUT THAT AREA IS SEEING AN EXPANDING LINE OF THUNDERSTORMS FORM WITH VERY SIMILAR SEVERE PARAMETERS TO WHAT WE WILL SEE TOMORROW. COLD FRONT CLEARS OUR AREA SLOWLY SUNDAY EVENING. SOME HEAVY RAIN MAY LINGER OVER THE FAR EAST ESPECIALLY IF A LINE OF STORMS CAN FORM. WE WILL TURN MUCH COOLER MONDAY WITH RAIN SHOWERS POSSIBLE ESPECIALLY ACROSS THE NORTH IN A CYCLONIC FLOW. && .LONG TERM /MONDAY NIGHT THROUGH FRIDAY/... MONDAY NIGHT HIGH PRESSURE BEGINS TO RIDGE IN AT THE SURFACE BUT STILL DEALING WITH AN UPPER LEVEL TROUGH AND A POSSIBLE SHORT-WAVE ROTATING AROUND THE BASE. JET EXIT REGION MOVING IN HENCE CLOUDS AND A SOME CHANCE OF A SHOWER ACROSS THE NORTHERN ZONES. TUESDAY TROUGH MOVES TO EAST. NW FLOW AND SEASONABLY COOL. TUESDAY NIGHT AND WED LOOK LIKE GOOD WEATHER DAYS. CLOUDS AND A SMALL CHANCE OF SHOWER BY LATE DAY. COLD FRONT MOVES INTO GREAT LAKE REGION WEDNESDAY NIGHT. POSSIBLE WARM FRONTAL WAVE TO OUR SOUTH. INCREASING CLOUDS AND POPS MOVING INTO THURSDAY. FRONT PROGRESSES THROUGH THE REGION THURS AND THURS NIGHT. FRIDAY LOOKING AT NW FLOW. SOME LAKE ENHANCE CLOUDS AND MAYBE A LIGHT SHOWER OVER THE HIGHER TERRAIN DOWN WIND. CLEARING CONDITION BY EVENING AND INTO THE OVERNIGHT BUT NOW WE ARE IN A FAST WESTERLY FLOW PATTERN ALOFT AND THE NEXT SYSTEM IS ALREADY ADVANCING CLOUDS BY MORNING WITH ANOTHER CHANCE OF SHOWERS AND THUNDERSTORM DURING THE DAY SATURDAY. && .AVIATION /19Z SATURDAY THROUGH THURSDAY/... VFR CIGS UNTIL AREAS OF SHOWERS AND THUNDERSTORMS MOVE IN FROM WEST LATER THIS AFTERNOON AND EVENING AND THEN GENERALLY MVFR WITH IFR CIGS/VSBY IN SOME SHOWERS AND TSTMS ESPECIALLY OVER HIGHER TERRAIN. SHOWERS AND LOW CIGS EXPECTED TO LINGER OVERNIGHT WITH GRADUAL IMPROVEMENT SUNDAY TO VFR CIGS BY MIDDAY BUT LINGERING SCATTER SHOWERS WITH MVFR CIGS/VSBY. WINDS OUT OF THE S AT 10 KT BECOMING SW 5 TO 10 KT SUNDAY MORNING. .OUTLOOK... SUN NGT AND MON...VFR. TUE/WED...VFR. SOME MORNING IFR FOG IN VALLEYS. THU...MAINLY VFR BECOMING MVFR. LOCAL IFR IN TSRA. && .BGM WATCHES/WARNINGS/ADVISORIES... PA...NONE. NY...NONE. && SYNOPSIS...HEDEN NEAR TERM...HEDEN SHORT TERM...HEDEN LONG TERM...BMW AVIATION...BMW
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BINGHAMTON NY 248 PM EDT SAT JUL 27 2013 NYZ015>018-022>025-044-055-056-PAZ038-039-043-044-047-281900- YATES-SENECA-SOUTHERN CAYUGA-ONONDAGA-STEUBEN-SCHUYLER-CHEMUNG- TOMPKINS-CORTLAND-TIOGA-BROOME-BRADFORD-SUSQUEHANNA-WYOMING- LACKAWANNA-LUZERNE- 248 PM EDT SAT JUL 27 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW YORK AND NORTHEAST PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP THROUGH EARLY EVENING AHEAD OF AN UPPER LEVEL SYSTEM. AN ISOLATED STORM MAY HAVE THE POTENTIAL TO BECOME SEVERE AND PRODUCE GUSTY WINDS. IN ADDITION LOCALLY HEAVY RAINFALL IS POSSIBLE AS THE STORMS MAY CONTINUE TO TRACK ACROSS THE SAME AREA OVER AND OVER. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. HEDEN NYZ009-036-037-045-046-057-062-PAZ040-048-072-281900- NORTHERN ONEIDA-MADISON-SOUTHERN ONEIDA-CHENANGO-OTSEGO-DELAWARE- SULLIVAN-NORTHERN WAYNE-PIKE-SOUTHERN WAYNE- 248 PM EDT SAT JUL 27 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW YORK...SOUTHEASTERN NEW YORK AND NORTHEAST PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. 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
448 PM EDT SAT JUL 27 2013
NYZ018-272115-
ONONDAGA NY-
448 PM EDT SAT JUL 27 2013
...STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN ONONDAGA COUNTY...
* AT 444 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CAPABLE OF PRODUCING SMALL HAIL. THIS STORM
WAS LOCATED NEAR BALDWINSVILLE...AND MOVING NORTHEAST AT 25 MPH.
* THE STRONG THUNDERSTORM WILL BE NEAR...
EUCLID AND BAYBERRY AT 500 PM EDT...
CLAY AT 505 PM EDT...
BREWERTON AT 515 PM EDT...
THIS STORM HAS THE POTENTIAL TO PRODUCE VERY HEAVY RAIN...AND COULD
CAUSE LOCALIZED FLOODING OF ROADS AND POOR DRAINAGE AREAS.
LAT...LON 4325 7617 4323 7611 4318 7615 4300 7649
4321 7648 4324 7646 4324 7631 4321 7627
4324 7626 4321 7622 4322 7621 4327 7622
4327 7620
DJNSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BINGHAMTON NY
544 PM EDT SAT JUL 27 2013
NYZ022-272245-
STEUBEN NY-
544 PM EDT SAT JUL 27 2013
...STRONG THUNDERSTORM WILL AFFECT WESTERN STEUBEN COUNTY...
* AT 537 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CAPABLE OF PRODUCING SMALL HAIL...STRONG GUSTY
WINDS...AND VERY HEAVY RAIN. THIS STORM WAS LOCATED 11 MILES
SOUTHWEST OF TROUPSBURG...AND MOVING NORTHEAST AT 25 MPH.
* THE STRONG THUNDERSTORM WILL BE NEAR...
WILLEYVILLE AT 550 PM EDT...
YOUNG HICKORY AND TROUPSBURG AT 600 PM EDT...
TROUPSBURG AND GREENWOOD AT 605 PM EDT...
JASPER AT 615 PM EDT...
CANISTEO AT 625 PM EDT...
WEST CAMERON AND CAMERON AT 635 PM EDT...
NORTH CAMERON AT 640 PM EDT...
BATH AND KANONA AT 645 PM EDT...
THIS STORM HAS THE POTENTIAL TO BECOME SEVERE AND PRODUCE LARGE HAIL
AND/OR DAMAGING WINDS. RAINFALL AMOUNTS COULD BE HALF AN INCH TO AN
INCH.
LAT...LON 4208 7775 4212 7775 4249 7753 4236 7721
4199 7752 4199 7754 4199 7774 4200 7775
4208 7776
/TACThe Binghamton radar (KBGM), 130 km away, was scanning. The volume nearest the first event began at 22:11 UTC.
1 tornado. Local standard time, as filed.
EF1 tornado had a 14 mile path length and 500 yard path width with estimated winds of 100 MPH. Numerous trees and power poles were snapped along its length. A barn was completely destroyed one mile southeast of Troupsburg.
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 historyThe tornado archive for New York, 2013Warnings 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: 457425.