A very unstable air mass was present Friday afternoon and evening as a warm front lifted north that morning across the state of Pennsylvania and New York. A shortwave aloft which was embedded within the cyclonic flow interacted with this front and showers and thunderstorms developed over central New York.
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.
A very unstable air mass was present Friday afternoon and evening as a warm front lifted north that morning across the state of Pennsylvania and New York. A shortwave aloft which was embedded within the cyclonic flow interacted with this front and showers and thunderstorms developed over central New York. Late Friday afternoon the front started to slowly shift southward as a cold front. Showers and thunderstorms continued to develop along the front into the late evening hours as it moved southward into Pennsylvania. These storms produced damaging winds and large hail.
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 12, 12:48 PM EST, 1 hour 27 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BINGHAMTON NY 148 PM EDT FRI JUN 12 2015 .SYNOPSIS... TODAY WILL BE VERY WARM AND MORE HUMID...AS SOUTHERLY WINDS BRING IN A SUMMER-LIKE AIR MASS. TODAY HIT AND MISS SHOWERS AND THUNDERSTORMS WILL OCCUR...WITH MORE WIDESPREAD ACTIVITY THIS EVENING. SOME OF THE STORMS LATER TODAY COULD BE ON THE STRONG SIDE...WITH GUSTY WINDS AND HEAVY DOWNPOURS POSSIBLE. A COLD FRONT WILL PUSH SOUTH OF THE REGION SATURDAY...WITH DRIER WEATHER RETURNING. && .NEAR TERM /THROUGH SATURDAY/... 10 AM UPDATE... ISOLATED SHOWERS AND A FEW THUNDERSTORMS ALREADY GOING IN NY. ADDED THESE IN. THIS HAS KEPT TEMPS LOW AND DEWPOINTS HIGH. MOVEMENT IS TO THE NE AND OUT OF THE AREA FOR THE MOST PART BY NOON. A BRIEF GAP THEN INCREASING CHANCES THIS AFTN. 415 AM UPDATE... THE SFC FRNTL ZN THAT HAS BEEN MEANDERING OVER OR NEAR OUR FCST AREA FOR MUCH OF THE WEEK...EXTENDS FROM NRN OH TO CNTRL/SRN PA EARLY THIS MRNG. THIS BNDRY IS BEGINNING TO PUSH NWD ONCE AGN AS A WARM FRNT...AND IN RESPONSE TO THIS...ELEVATED CONVECTION IS DVLPG FROM SRN ONT-WRN NY. SOME OF THIS ACTIVITY MAY SKIRT OUR FAR NRN ZNS THROUGH 9 OR 10 AM...BUT THE VAST MAJORITY OF THE CWA SHOULD REMAIN PCPN-FREE OVER THE VERY NEAR TERM. THE OTHER ISSUE EARLY THIS MRNG IS LOCALLY DENSE FOG OVER PTNS OF SRN LUZERNE CNTY IN NE PA...WHERE SOME HEAVY RAINFALL OCCURRED LAST EVENING. THE FOG HERE SHOULD BURN OFF BY 8-9 AM. FOR THE LATE MRNG-EARLY AFTN PD (10 AM-2 PM)...WE'LL SEE SUNSHINE THROUGH HIGH CLDNS...ALG WITH INCREASINGLY WARM HUMID CONDS...AS CNY/NE PA EMERGES INTO THE WARM SECTOR. FROM MID-AFTN INTO THE EARLY EVE (ROUGHLY 2-8 PM)...WE SHOULD SEE ISOLD-SCTD CONVECTION START TO FIRE...AS THE AMS BCMS MDTLY-VERY UNSTABLE (PROGGED ML CAPES OF 1500-2500 J/KG (LEANED HEAVILY ON THE NAM/HI-RES ARW/RGNL GEM FOR THIS PROGNOSIS))...AND LARGE-SCALE FORCED LIFT GRADUALLY IMPROVES (MAINLY CNY)...OWING TO LOW-LVL CONVERGENCE NEAR THE RETREATING WARM FRNTL BNDRY AND ANY LAKE BREEZE BNDRYS...PLUS UPR-LVL DIFLUENCE UNDERNEATH A DVLPG JET ENTRANCE RGN. MOST OF THE CONVECTIVE COVERAGE DURG THE DAYLIGHT HRS SHOULD BE OVER OUR CNY CNTYS...WITH MORE ISOLD ACTIVITY DOWN OVER NE PA/SULLIVAN CNTY NY. AS FAR AS STORM INTENSITY GOES...WE STILL THINK THERE IS A SVR WX THREAT...AS DEEP-LYRD SHEAR (PROJECTED 0-6 KM BULK SHEARS OF 30-40 KT) ACCOMPANIES THE PREV MENTIONED CAPE. SUCH CAPE/SHEAR PROFILES COULD BE SUPPORTIVE OF LOCALIZED SUPERCELLS...AND/OR STG LINEAR FEATURES. THE SVR WX THREAT WILL CONTINUE TO BE HIGHLIGHTED LOCALLY IN OUR HWO PRODUCT...AND SPC ALSO CONTINUES TO PAINT A SLGT RISK OF SVR THIS AFTN/EVE...MAINLY AGN OVER OUR NY CNTYS. FOR THE MID TO LATE EVE PD (ROUGHLY 8 PM-2 AM)...AS A SFC WV TRACKS FROM UPSTATE NY INTO NRN NEW ENG/SRN QB...THE MAIN SFC BNDRY SHOULD GET DRAGGED BACK SWD AS A COLD FRNT THROUGH CNY/NE PA. AS THIS OCCURS...THERE IS DECENT MODEL AGREEMENT ON MORE WIDESPREAD CONVECTIVE COVERAGE FROM ABT THE TWIN TIERS NWD...WHERE UPR-LVL SUPPORT IS MAXIMIZED. ACRS MUCH OF NE PA...SHWRS/TSTMS SHOULD REMAIN MUCH MORE SCTD IN NATURE. AS WE PROGRESS THROUGH THE EVE HRS...ANY LINGERING SVR WX THREAT SHOULD TRANSITION MORE TO A HEAVY RAINFALL SCENARIO...AS THE INSTABILITY SLOWLY DIMINISHES AND THE SHEAR ALSO WEAKENS. PARAMETERS LOOK FAVORABLE FOR LOCALIZED HEAVY CONVECTIVE RAINFALL...WITH A VERY JUICY ENVIRONMENT (PWAT VALUES NEAR OR EVEN ABV 2" AND WCD'S OF 12-14K FT) AND INITIALLY GOOD SYNOPTIC-SCALE LIFT NEAR THE SWD MOVG COLD FRNT (ALTHOUGH THIS WEAKENS LATE AT NGT BY THE TIME THE FRNT REACHES NE PA...AS ALLUDED TO EARLIER). FOR THESE REASONS...WE'LL HIGHLIGHT AREAS FROM THE TWIN TIERS NWD THIS EVE FOR PSBL HEAVY RAINFALL/ISOLD FLASH FLOODING. WPC HAS ALSO PLACED PTNS OF WRN/CNTRL NY IN A SLGT RISK FOR EXCESSIVE RAINFALL THIS PD. IN GENERAL...SHWRS/TSTMS DECREASE BOTH IN INTENSITY/COVERAGE DURG THE PRE-DAWN HRS EARLY SAT. DURG THE DAY SAT...THE SFC BNDRY SHOULD ONCE AGN SETTLE JUST TO OUR S ACRS THE SRN HALF OF PA. THIS FRNT MAY REMAIN CLOSE ENUF TO SPARK A FEW WIDELY SEPARATED SHWRS/TSTMS ON SAT AFTN...MAINLY DOWN OVER OUR FAR SRN AREAS (MOSTLY S OF A WILKES-BARRE-CARBONDALE-HONESDALE-MONTICELLO LN). FOR MUCH OF THE RGN ON SAT THOUGH...IT SHOULD BE RAIN-FREE...WITH AT LEAST PTLY SUNNY SKIES...AND SOMEWHAT LWR HUMIDITY VALUES. && .SHORT TERM /SATURDAY NIGHT THROUGH MONDAY NIGHT/... 325 AM UPDATE... UPPER RIDGE EXTENDING IN FROM THE SOUTH...AND SURFACE RIDGE EXTENDING IN FROM QUEBEC...SHOULD MAKE SATURDAY NIGHT INTO SUNDAY FAIRLY QUIET EXCEPT FOR SOME VALLEY FOG SUNDAY MORNING. REMAINS OF SURFACE FRONT WILL BE PUSHED TOWARDS SW PA...THUS ONLY SLIGHT CHANCE OF SHOWERS AT BEST IN CENTRAL TWIN TIERS TO WYOMING VALLEY SATURDAY NIGHT. NOMINAL INSTABILITY IN CENTRAL SOUTHERN TIER NY SUNDAY AFTERNOON COULD BURP UP AN ISOLATED SHOWER OR STORM...AS A SHORTWAVE ATTEMPTS TO RIDE THROUGH THE UPPER RIDGE. UPPER RIDGE FLATTENS A BIT SUNDAY NIGHT ONWARD...ALLOWING VERY MOIST AIRMASS TO RETURN INCLUDING PRECIPITABLE WATER VALUES OF 2 INCHES OR SO ACCORDING TO THE GFS...OR BETWEEN 2 AND 3 STANDARD DEVIATIONS ABOVE NORMAL. NOT SEEING STRONG FORCING JET- WISE...AND THERE MAY BE A FAIR AMOUNT OF CLOUDS WHICH MAY SOMEWHAT HOLD BACK DAYTIME HEATING. HOWEVER...WITH THE RIDGE FLATTENED...SHORTWAVES WILL BE TRAVERSING THROUGH THE AREA WITH SURFACE FRONT WAFFLING BACK-AND-FORTH. SO OVERALL SHOWERS AND SOME THUNDERSTORMS LOOKING PROBABLE ESPECIALLY MONDAY-MONDAY NIGHT AS A BETTER-MARKED WAVE PUSHES THROUGH WITH THE HIGH PWAT VALUES. LOCALIZED HEAVY RAINFALL COULD BECOME AN ISSUE WHERE MULTIPLE ROUNDS OCCUR...PARTICULARLY CENTRAL NY ZONES. && .LONG TERM /TUESDAY THROUGH THURSDAY/... HIPRES BLDS IN TUE BRINGING CLRG SKIES HOLDING INTO WED. HWVR...IT/S A BIT OF A DIRTY FLAT RDG AND ISLTD CONV CAN NOT BE RULED OUT...ESP OVER THE PA ZONES. SLY FLOW AND MOISTURE RETURNS IN EARNEST LATE WED INTO THU AS A WV AND SFC LOW APRCHS FROM THE GREAT LAKES. THIS WILL BRING AN INCRSD CHANCE OF SHWRS AND TRWS INTO THU AND BEYOND. HPC GUID WAS IN GOOD AGREEMENT WITH OTR MODEL GUID AND WAS GRNLY FLWD. MINOR TWEAKS TO DATA FOR BETTER COLLABORATION AND TO BRING BETTER CONSISTANCY. && .AVIATION /18Z FRIDAY THROUGH WEDNESDAY/... STRONG COLD FNT WILL DROP INTO THE AREA THIS AFTN AND EVE TRIGGERING SHWRS AND TRWS...ESP OVER THE NY TAF SITES. XPCT BRIEF REDUCTIONS IN VSBY AND CIGS WITH THE STORMS...ALONG WITH STRONG WINDS. FNT WEAKENS OVER THE NY/PA BRDR AND CONV WILL SLOWLY END. LEFTOVER MOISTURE MAY RESULT IN OCNL MVFR CIGS AND VSBYS...AND ISLTD IFR CONDS...THRU LATE NGT. CLRG ON SAT WILL BRING VFR CONDS BEFORE THE END OF TEH PD. .OUTLOOK... SAT -SAT NGT-SUN...VFR EXCEPT FOR VALLEY FOG SUN MRNG ESPECIALLY KELM. SUN NGT-TUE...POSSIBLE SHRA-TSRA AND ASSOCIATED RESTRICTIONS. WED...VFR. && .BGM WATCHES/WARNINGS/ADVISORIES... PA...NONE. NY...NONE. && SYNOPSIS...MLJ/TAC NEAR TERM...MLJ/TAC SHORT TERM...MDP LONG TERM...DGM AVIATION...DGM
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BINGHAMTON NY 410 AM EDT FRI JUN 12 2015 NYZ009-015>018-022>025-036-037-044>046-055>057-062-PAZ038>040-130815- 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- 410 AM EDT FRI JUN 12 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW YORK AND NORTHEAST PENNSYLVANIA. .DAY ONE...TODAY AND TONIGHT. SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON...BECOMING MORE NUMEROUS THIS EVENING. SOME OF THESE STORMS COULD BECOME SEVERE...WITH STRONG WINDS AND HAIL THE PRIMARY THREATS. IN ADDITION...LOCALLY HEAVY RAIN IS POSSIBLE...ESPECIALLY THIS EVENING. THERE WOULD BE POTENTIAL FOR ISOLATED FLASH FLOODING...IF HEAVY RAINFALL BECOMES PROLONGED OVER ANY ONE AREA. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON OR EVENING. PAZ043-044-047-048-072-130815- WYOMING-LACKAWANNA-LUZERNE-PIKE-SOUTHERN WAYNE- 410 AM EDT FRI JUN 12 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST PENNSYLVANIA. .DAY ONE...TODAY AND TONIGHT. ISOLATED TO SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON AND EVENING. SOME OF THESE STORMS COULD BECOME SEVERE...WITH STRONG WINDS AND HAIL THE PRIMARY THREATS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. JUREWICZ
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BINGHAMTON NY
215 PM EDT FRI JUN 12 2015
NYZ015>018-121900-
SENECA NY-ONONDAGA NY-YATES NY-SOUTHERN CAYUGA NY-
215 PM EDT FRI JUN 12 2015
...STRONG THUNDERSTORMS WILL AFFECT SOUTHWESTERN ONONDAGA...CENTRAL
SENECA...CENTRAL CAYUGA AND NORTHEASTERN YATES COUNTIES ...
* AT 215 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
OVER KENDAIA...OR 8 MILES NORTHEAST OF PENN YAN...MOVING EAST AT 45
MPH.
* SMALL HAIL AND STRONG WIND GUSTS WILL BE POSSIBLE WITH THIS STORM.
* THIS STRONG THUNDERSTORM WILL BE NEAR...
ROMULUS AND OVID AROUND 220 PM EDT.
AURORA...LEVANNA AND CANOGA AROUND 230 PM EDT.
LEDYARD AND UNION SPRINGS AROUND 235 PM EDT.
SCIPIO CENTER AND VENICE CENTER AROUND 240 PM EDT.
FLEMING...CASOWASCO AND MELROSE PARK AROUND 245 PM EDT.
OWASCO AROUND 250 PM EDT.
SKANEATELES...NILES AND KELLOGGSVILLE AROUND 255 PM EDT.
MARCELLUS AROUND 300 PM EDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM. DO NOT DRIVE
YOUR VEHICLE THROUGH FLOODED ROADWAYS.
&&
LAT...LON 4277 7697 4282 7697 4304 7633 4278 7620
4262 7697 4276 7704
TIME...MOT...LOC 1815Z 250DEG 38KT 4274 7692
RHBThe Binghamton radar (KBGM), 78 km away, was scanning. The volume nearest the first event began at 19:16 UTC.
34 thunderstorm wind, 7 hail, 2 funnel cloud. Local standard time, as filed.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in numerous trees and wires forced down between Niles and Sempronious.
A severe thunderstorm developed over the area and produced half dollar sized hail.
A severe thunderstorm developed over the area and produced one inch sized hail.
A severe thunderstorm produced severe winds and was estimated to be 50 knots as it moved across the area.
A severe thunderstorm developed over the area and produced one inch sized hail.
A severe thunderstorm developed over the area and produced half dollar sized hail.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in numerous trees being forced down near Tully.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in numerous trees being knocked over.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in a few trees being knocked over along with forcing power lines down between Ruyter to Georgetown.
A severe thunderstorm developed over the area and produced half dollar sized hail.
A thunderstorm developed over the area and produced a rotating wall cloud. A funnel was reported with this wall cloud.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in numerous trees being knocked down and uprooted in Hamlet.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in multiple trees being knocked down across the area.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in a few trees being knocked over.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in multiple trees being knocked over. Time was radar estimated.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in many electric poles and wires down.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in wires being knocked down across the area.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in trees being knocked over Rt 8 and Sickle Hill Road.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in trees being knocked over.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in trees and wires being knocked down around Watkins Glen.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in a few trees being knocked over.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in trees being knocked over at Route 8 and Sickle Road.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in trees being knocked over at Fillmore Glen State Park.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in a tree being knocked over.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in trees being knocked over.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in trees being knocked over around Ithaca.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in trees being knocked over in Newfield, the city of Ithaca and the town of Caroline.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in trees being knocked over near SUNY Cortland Stadium.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in a roof being blown off a garage and a tree falling on a car on McMaster street.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in a few trees being knocked over in northern Broome County.
A severe thunderstorm developed over the area and produced one inch sized hail.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in many trees being blown down and some lines knocked over near Oxford.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in a few trees being knocked over near Candor, Village of Owego and Newark valley.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in trees being knocked over in Otsego, Morris, Gilbertsville, Milford and Laurens.
A severe thunderstorm developed over the area and produced golf ball sized hail.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted a large tree falling on a house.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in trees being knocked over in the Bainbridge-Afton area.
A thunderstorm developed and produced a funnel cloud.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in several trees being knocked over or uprooted. Power lines were knocked over due to falling trees.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in trees being knocked over.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in trees being knocked over.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in trees being knocked over.
A severe thunderstorm produced severe winds as it moved across the area. The thunderstorm resulted in trees being knocked over in Delaware county and in the city of Walton.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2015Every state in 2015This day in weather historyWarnings in New York, June 2015
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: 589263, 589254, 589255, 589280, 589256, 589257, 589265, 589267, 589268, 589258, 589252, 589270, 589271, 589272, 589273, 589274, 589275, 589277, 589278, 589279, 589287, 589282, 589294, 589296, 589284, 589285, 589288, 589289, 589283, 589286, 589259, 589300, 589291, 589303, 589260, 589292, 589301, 589253, 589299, 589304, and more.