A complex frontal system stalled over the Central Southern Tier of New York during the late afternoon and evening. This system triggered slow moving, heavy rain producing thunderstorms in the Elmira-Horseheads area which caused areas of flash flooding on area roads and small streams.
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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.
A complex frontal system stalled over the Central Southern Tier of New York during the late afternoon and evening. This system triggered slow moving, heavy rain producing thunderstorms in the Elmira-Horseheads area which caused areas of flash flooding on area roads and small streams.
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 31, 6:51 PM EST, 25 minutes earlier.
Area Forecast Discussion National Weather Service Binghamton NY 751 PM EDT Sat Aug 31 2024 .SYNOPSIS... Showers and thunderstorms in the Finger Lakes will slowly dissipate through the evening. A strong cold front will arrive late Sunday afternoon with brief showers. This will be followed by much drier and cooler conditions Monday. Quiet weather will reign through much of the week ahead with slowly warming temperatures. && .NEAR TERM /THROUGH SUNDAY NIGHT/... 7PM Update... With a shortwave moving through this evening there is still a few isolated thunderstorms across the Finger Lakes this evening but stable air from a marine layer will weaken the storms as they approach I-81. With flow becoming more westerly aloft, clouds will clear some tonight with winds becoming lighter so widespread valley fog is likely in most of the deep river valleys. SW flow tomorrow will bring in warmer air ahead of a cold front dropping through the Great Lakes. The front is not expected to move through till late in the afternoon or early evening with limited instability as CAPE is expected to be under 500 J/kg. Shear will be high at around 45 to 50 knots so there is a low chance that a cell will get strong enough to produce some damaging winds. Behind the front Sunday night into Monday, cool NW flow off of the Great Lakes will likely produce widespread stratus as well as some drizzle and lake effect rain showers. && .SHORT TERM /MONDAY THROUGH TUESDAY NIGHT/... 110 PM Update: A large/strong area of high pressure will dominate our weather though the short term period, which will bring a persistent period of mostly sunny skies/dry conditions. Cold air advection will result in below normal temperatures with highs on Monday and Tuesday only in the mid 60s to lower 70s, and overnight lows in the 40s to near 50. With radiational cooling conditions setting up, some lows in the mid to upper 30s cannot be totally ruled out Monday night across the usual colder spots of the Catskills and northern Oneida County, and therefore patchy frost cannot be totally ruled out either for those locations. && .LONG TERM /WEDNESDAY THROUGH SATURDAY/... 110 PM Update: High pressure remains in control at least through Thursday, which will continue to bring dry conditions and mostly sunny skies. Temperatures will be on a gradual moderating trend with highs mainly in the 70s. The weather pattern becomes a bit more uncertain/potentially active Friday through the weekend as a digging trough moves from the Central U.S. eastward to the Northeast U.S. However, there are significant timing differences (and strength differences) within the model guidance, so PoPs are no higher than 30% or so on any particular day right now. && .AVIATION /00Z SUNDAY THROUGH THURSDAY/... A few showers still persist around the ELM, ITH, and RME this evening but those will move away from the terminals over the next few hours. Given the amount of rain at ELM this evening and clearing skies behind the showers, it is likely IFR or worse conditions will be present until after 12Z tomorrow morning. With the clearing skies across much of CNY, most terminals will at least see some restrictions from fog development with BGM and ITH having the best chance at IFR Cigs and vis. SYR got plenty of rain today so a tempo for IFR vis was added for a few hours before sunrise. AVP will likely keep the low stratus and drizzle around through most of the night. RME tries to hang on to low clouds for most of the night so IFR cigs were kept in once the showers clear this evening. Tomorrow the fog will dissipate with day time heating and VFR conditions at all terminals by around 14Z. A cold front does move in late in the afternoon from the north though with little moisture in place, showers will be isolated. .Outlook... Sunday afternoon through Sunday night...Mainly VFR. Monday through Thursday...VFR expected. AM valley fog possible. && .BGM WATCHES/WARNINGS/ADVISORIES... PA...None. NY...None. && SYNOPSIS...AJG/MPH NEAR TERM...AJG/MWG SHORT TERM...BJG LONG TERM...BJG AVIATION...ES/MPH
Hazardous Weather Outlook National Weather Service Binghamton NY 343 PM EDT Sat Aug 31 2024 NYZ009-015>018-022>025-036-037-044>046-055>057-062-PAZ038>040-043- 044-047-048-072-011945- 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- 343 PM EDT Sat Aug 31 2024 This Hazardous Weather Outlook is for central New York and northeast Pennsylvania. .DAY ONE...Tonight. A few clusters of showers and thunderstorms will continue moving through the region through the evening. Locally heavy downpours and gusty winds are possible with the strongest storms. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed. Please relay any information about severe weather to the NWS.
The Binghamton radar (KBGM), 70 km away, was scanning. The volume nearest the first event began at 00:17 UTC.
2 flash flood. Local standard time, as filed.
State Route 14 is flooded near the intersection of Philo Road.
Interstate 86 was flooded near Exit 51.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2024Every state in 2024This day in weather historyWarnings in New York, August 2024
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: 1210569, 1210570.