A slow moving area of weak low pressure drifted across western and central New York producing areas of heavy rain producing thunderstorms across the Finger Lakes region. Flash flooding, and isolated debris flows, along the western shore of Seneca Lake were the result of local downpours in excess of 2 inches per hour.
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 slow moving area of weak low pressure drifted across western and central New York producing areas of heavy rain producing thunderstorms across the Finger Lakes region. Flash flooding, and isolated debris flows, along the western shore of Seneca Lake were the result of local downpours in excess of 2 inches per hour.
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 Sep 14, 5:44 AM EST, 3 hours 1 minute earlier.
Area Forecast Discussion National Weather Service Binghamton NY 644 AM EDT Thu Sep 14 2017 .SYNOPSIS... A weakening low will move across New York and Pennsylvania today. Showers will become more likely later this morning and continue through the afternoon. A rumble of thunder is also possible. Unsettled weather will last through Friday as weak low pressure remains over the northeast. Fair and warm weather will return for the weekend. && .NEAR TERM /THROUGH FRIDAY/... Upper level low over Ohio will lift northeast as it weakens and move into New York and Pennsylvania. Axis of moisture and lift associated with this feature will move across the area from west to east later this morning through the afternoon. Model consensus indicates lift will be best over the central and southern portion of the forecast area. Will continue to advertise likely pops over this area but the more widespread showers are not expected to affect the western Catskills and northeast Pennsylvania until this afternoon. Will mention a ruble of thunder as models show some instability. Total rainfall will generally range from a quarter to half inch. Highs will be in the lower to middle 70s. The showers will diminish quickly this evening as the main upper level wave moves into New England. Most areas will be dry by early evening. Overnight lows will range in the upper 50s to lower 60s. Friday...A weak upper level circulation remains over the northeast with axis of moisture now situated primarily over the eastern forecast area. Once diurnal instability occurs will include chance pops over northeast Pennsylvania, the southern tier and western Catskills. Due to some CAPE will mention slight chance for thunder. Highs will range in the middle to upper 70s. && .SHORT TERM /FRIDAY NIGHT THROUGH SATURDAY NIGHT/... 350 AM EDT Update... The upper-lvl trough will continue to slide to the east and become washed out within the flow while high pressure at the sfc will build over the region Friday night. This combination will result in showers quickly dissipating after sunset and temps falling into the mid 50s/low 60s Fri night. On Sat, weak ridging at all levels, accompanied with high pressure at the surface will result in mostly dry conditions over the region. There is a slight chance for precip over the higher terrain Sat afternoon and I-81 E, but chances are low, thus kept low pops in the forecast. These showers will be diurnally driven and expect the best chance to see activity will be the afternoon/early evening. Temps will rise into the uppr 70s/low 80s during the afternoon and low 60s/upper 50s during the overnight. && .LONG TERM /SUNDAY THROUGH WEDNESDAY/... 350 AM EDT Update... Updated forecast with new guidance. No significant changes were made to the previous forecast. For more information please read the previous forecast discussion below. Previous forecast discussion... Surface high pressure will build over much of the northeast for later this weekend and early next week. A storm system moving into Ontario may skirt our region early next week, causing a few showers across the region. Tropical system Jose is forecast to remain out to sea, well off the New Jersey coast next week, with the surface high over NY/PA blocking Jose's advance. We will continue to monitor the long range models. && .AVIATION /12Z THURSDAY THROUGH MONDAY/... An upper level low in the Ohio Valley will lift northeast into the local area during this TAF period. Conditions will generally be MVFR/Alternate required. Along with the low ceilings showers will move through the terminals primarily mid morning through early afternoon. At KAVP, the showers will occur during the afternoon. There will be slow improvement this afternoon and evening before MVFR/Alternate required restrictions develop overnight due to weak mixing. Light and variable winds or light s/sw becoming west/northwest later this afternoon then becoming light again overnight. Outlook... Friday through Saturday...Although VFR should prevail much of the time, brief restrictions in showers are possible. Sunday and Monday...VFR. && .BGM WATCHES/WARNINGS/ADVISORIES... PA...None. NY...None. && SYNOPSIS...RRM NEAR TERM...RRM SHORT TERM...KAH LONG TERM...DJP/KAH AVIATION...RRM
Hazardous Weather Outlook National Weather Service Binghamton NY 321 AM EDT Thu Sep 14 2017 NYZ009-015>018-022>025-036-037-044>046-055>057-062-PAZ038>040-043- 044-047-048-072-150730- 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- 321 AM EDT Thu Sep 14 2017 This Hazardous Weather Outlook is for central New York and northeast Pennsylvania. .DAY ONE...Today and Tonight. No hazardous weather is expected at this time. .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.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
818 AM EDT THU SEP 14 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0800 AM HEAVY RAIN 1 NNW HORNELL 42.33N 77.67W
09/14/2017 M1.69 INCH STEUBEN NY TRAINED SPOTTER
1.69 OF RAIN IN 2 HOURS
&&
CJPThe Binghamton radar (KBGM), 92 km away, was scanning. The volume nearest the first event began at 13:44 UTC.
2 flash flood. Local standard time, as filed.
A seasonal cabin was destroyed by a torrent of water, rocks and mud debris sliding down a steep hillside on the western shore of Seneca Lake.
A lakeside home was damaged by a torrent of water and debris sliding down a steep hillside on the western shore of Seneca Lake. A portion of the foundation was destroyed, and the lower floor of the residence was filled with mud and debris.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2017Every state in 2017This day in weather historyWarnings in New York, September 2017
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: 719556, 719557.