Deep moisture and instability in place over Central New York on this day combined with a slow moving upper level disturbance to trigger heavy rain producing thunderstorms. Localized flashed flooding occurred in a few areas with minimal impact to roads.
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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.
Deep moisture and instability in place over Central New York on this day combined with a slow moving upper level disturbance to trigger heavy rain producing thunderstorms. Localized flashed flooding occurred in a few areas with minimal impact to roads.
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 5, 2:10 PM EST, 2 hours 43 minutes earlier.
Area Forecast Discussion National Weather Service Binghamton NY 310 PM EDT Mon Aug 5 2024 .SYNOPSIS... Showers and thunderstorms move through this afternoon and evening with the potential for some storms to be severe. Cooler temperatures are expected tomorrow and rain chances will increase through the week with upper level troughing overhead. && .NEAR TERM /THROUGH TUESDAY NIGHT/... Surface cold front moves through our region late afternoon and evening. Showers and thunderstorms fire up ahead of the front with the potential for some of these storms to become severe. Modeled soundings show CAPE values ranging 1000-1500 J/Kg along with 40-45 knots of 0-6 km shear and favorable PWAT values up to 1.8 inches. Damaging winds and hail are our main threats with localized flash flooding possible with heavy downpours. Showers and storms will persist into the overnight hours, with the severe threat ending by late evening, however the flash flooding threat will remain through the period especially due to saturated soils from previous rainfall events. More showers and storms are expected as another perturbation moves through tomorrow. However, at this time, it appears that the bulk of the thunderstorm activity will occur late in the day and overnight into Wednesday morning. Severe threat is not as organized and focused over northeast PA with damaging winds being the main severe threat. Localized flash flooding potential is favorable towards our eastern PA counties. Held off on issuing a flash flood watch at this time due to uncertainty. Temperatures will also be cooler behind the front with highs climbing into the mid to upper 70s in the afternoon. Lows will follow that trend with temperatures dipping into the 50s overnight. && .SHORT TERM /WEDNESDAY THROUGH THURSDAY NIGHT/... 140 PM Update... Showers from a departing shortwave may linger into Wednesday but look to move out of the region late Wednesday evening. Instability will be quite limited, so anything that remains should be mainly just rain showers, though a thunderstorm or two cannot be ruled out. Weak high pressure will build into the region and will bring a brief period of dry conditions with it. Thursday is trending dry as well, though some showers may be pushed north from Debby, especially into NEPA and the Catskills. An upper-level low/trough deepens over the Great Lakes late Thursday. This will strengthen the southwest flow that will advect tropical moisture into the region and allow showers to spread northward during the overnight hours. PWATs will increase Thursday night to 1.7 to 2 inches, at least based on deterministic guidance, which is right around 2 standard deviations above normal for this time of year. Ensemble guidance is not as high with PWATs and keeps higher values along the coastline. Looking at soundings, there will also be warm cloud depths exceeding 12k ft. With plenty of moisture to work with, heavy rain showers will be possible. Given the rainfall expected earlier in the week, conditions may become more favorable for localized hydro concerns, but that will be something we will need to monitor throughout the week. Temperatures will climb into the 70s and low 80s both Wednesday and Thursday. Wednesday night will be the cooler of the two as temps fall into the 50s and 60s. Thursday night will be at least a few degrees warmer with more locations staying in the 60s. && .LONG TERM /FRIDAY THROUGH MONDAY/... 140 PM Update... While the end of the week is somewhat uncertain based on how the remnants of Debby track and the upper trough interact, the potential for heavy rain will remain present through Friday with conditions potentially improving over the weekend. There will also be enough instability to support thunderstorms. Model guidance does differ on whether or not Debby stays as an organized surface low or if the upper feature becomes more dominant. Either way, high PWATs are still modeled through the end of the week, though the greatest moisture content will be along the coast. WPC does have a slight risk for excessive rainfall for a portion of our area. Similarly to the short term, we will have to monitor rainfall and conditions throughout the week to have a better idea of hydro concerns. River ensemble guidance are mixed, but there are non-zero chances that some of our more trouble points could exceed action or even flood stage by week's end. Showers linger into Saturday but do begin to move out. Drier conditions become more probably Saturday night into Sunday, though that will depend on the location of the upper-level low as some weaker waves may kick off passing showers. Given the uncertainty in the forecast, slight chance to low chance PoPs are in the forecast through the start of next week. With ongoing showers and falling heights throughout the weekend, temperatures will only max out in the 70s to low 80s this period. Overnight lows will be in the 50s and 60s. && .AVIATION /19Z MONDAY THROUGH SATURDAY/... VFR conditions are expected for the beginning of the period. A cold front will enter the region this afternoon kicking off scattered thunderstorms. These storms will bring restrictions at all sites. Mainly expecting MVFR to Fuel Alt ceilings with brief periods of IFR visibility possible with some showers. Model guidance tonight hints at ceilings as low as Below Alt mins at ELM and possibly ITH. Confidence was not as high to include at ITH. MVFR ceilings will be possible through the early morning hours on Tuesday before lifting to VFR for the remaining period. .Outlook... Tuesday...Mostly VFR, but scattered showers and thunderstorms expected in the afternoon and evening, bringing associated restrictions. Storms will be most likely at AVP. Wednesday through Thursday...Mainly VFR. Friday...Chances for showers and thunderstorms increase again, with associated restrictions. && .BGM WATCHES/WARNINGS/ADVISORIES... PA...None. NY...None. && SYNOPSIS...ES NEAR TERM...ES SHORT TERM...BTL LONG TERM...BTL AVIATION...ES
Hazardous Weather Outlook National Weather Service Binghamton NY 127 PM EDT Mon Aug 5 2024 NYZ015>018-022>025-036-044>046-055>057-PAZ038-039-043-061730- Yates-Seneca-Southern Cayuga-Onondaga-Steuben-Schuyler-Chemung- Tompkins-Madison-Cortland-Chenango-Otsego-Tioga-Broome-Delaware- Bradford-Susquehanna-Wyoming- 127 PM EDT Mon Aug 5 2024 ...SEVERE THUNDERSTORM WATCH 597 IN EFFECT UNTIL 8 PM EDT THIS EVENING... This Hazardous Weather Outlook is for central New York and northeast Pennsylvania. .DAY ONE...This afternoon and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Scattered showers and thunderstorms Tuesday night into Wednesday may produce heavy downpours and localized flash flooding. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to Standard Operating Procedures. Please relay any information about severe weather to the NWS. NYZ009-037-062-PAZ040-044-047-048-072-061730- Northern Oneida-Southern Oneida-Sullivan-Northern Wayne-Lackawanna- Luzerne-Pike-Southern Wayne- 127 PM EDT Mon Aug 5 2024 This Hazardous Weather Outlook is for central New York and northeast Pennsylvania. .DAY ONE...This afternoon and tonight. Scattered severe thunderstorms are possible this afternoon through early evening as a cold front pushes through the region. Gusty winds and large hail will be possible with any storms that develop. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Scattered showers and thunderstorms Tuesday night into Wednesday may produce heavy downpours and localized flash flooding. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to Standard Operating Procedures. Please relay any information about severe weather to the NWS.
Preliminary Local Storm Report
National Weather Service Binghamton NY
520 PM EDT Mon Aug 5 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0504 PM Tstm Wnd Dmg Hallstead 41.96N 75.75W
08/05/2024 Susquehanna PA 911 Call Center
Corrects previous tstm wnd dmg report from
Hallstead. Trees down on Snake Creek Road.
&&Preliminary Local Storm Report
National Weather Service Binghamton NY
523 PM EDT Mon Aug 5 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0413 PM Tstm Wnd Dmg West Corners 42.12N 76.07W
08/05/2024 Broome NY NWS Employee
Tree down on River drive and Orman street
intersection.
&&Preliminary Local Storm Report
National Weather Service Binghamton NY
536 PM EDT Mon Aug 5 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0522 PM Tstm Wnd Dmg New Milford 41.88N 75.73W
08/05/2024 Susquehanna PA 911 Call Center
Wire down in backyard of house.
&&Preliminary Local Storm Report
National Weather Service Binghamton NY
545 PM EDT Mon Aug 5 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0415 PM Tstm Wnd Dmg 1 SSE Wedgewood 42.34N 76.87W
08/05/2024 Schuyler NY 911 Call Center
Trees down (Radar Estimated Time).
&&
ESPreliminary Local Storm Report
National Weather Service Binghamton NY
546 PM EDT Mon Aug 5 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0527 PM Tstm Wnd Dmg New Milford 41.88N 75.73W
08/05/2024 Susquehanna PA 911 Call Center
&&Preliminary Local Storm Report
National Weather Service Binghamton NY
548 PM EDT Mon Aug 5 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0222 PM Tstm Wnd Dmg 1 SSE Wedgewood 42.34N 76.87W
08/05/2024 Schuyler NY 911 Call Center
Trees down (Radar Estimated Time) Coykemdall
Road.
&&
ESThe Binghamton radar (KBGM), 13 km away, was scanning. The volume nearest the first event began at 21:53 UTC.
2 flash flood. Local standard time, as filed.
Thunderstorm rains flooded Franklin Street and the Route 26 underpass near the Cider Mill.
Water was reported running across Oneida Street.
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: 1210567, 1210568.