An upper-level low pressure system was the driving force of scattered storms across Northeastern Pennsylvania. Warm, moist air became unstable enough for isolated severe storms.
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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 low pressure system was the driving force of scattered storms across Northeastern Pennsylvania. Warm, moist air became unstable enough for isolated severe storms. These storms had strong wind gusts that knocked over trees and wires in Bradford County.
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 22, 8:47 AM EST, 3 hours 20 minutes earlier.
Area Forecast Discussion National Weather Service Binghamton NY 947 AM EDT Mon Jul 22 2024 .SYNOPSIS... After a dry and partly sunny start to the day, another round of showers and thunderstorms arrives for the late afternoon and evening hours. The active weather pattern continues into the middle of the work week with scattered showers and thunderstorms around each day. Conditions become drier and warmer later in the week and into the weekend as high pressure builds over the region. && .NEAR TERM /THROUGH TUESDAY/... 945 AM Update... Minor updates to the near term forecast. Blended newest data into temperature observations. Otherwise, near-term forecast remains on track. 645 AM Update No significant changes needed to the near term forecast with this update. Starting off in the mid-50s to lower 60s out there with some valley fog and sct to broken high clouds streaming into the area from the southwest. Timing for rain and t'storm development still looks like initiation between 3-6 PM from south to north; but not reaching the I-90 corridor until almost sunset. 400 AM Update Quiet weather this morning, with a mix of sun, high clouds and some patchy valley fog out there. Skies will remain partly sunny into the midday hours, before turning mostly cloudy to overcast this afternoon. Highs should still reach the low to mid-80s over the area...with some upper 80s for Syracuse and Utica possible. At the same time, moisture and instability will be increasing on the southerly flow, as PWATs reach up to 1.75 inches at times this afternoon/evening. The main upper level low is evident on the mid-level water vapor loop early this morning across central Illinois; with several embedded shortwaves across the Central Appalachians, Carolinas and southern Mid- Atlantic states. Each of these have areas of showers and thunderstorms already associated with them on the latest regional MRMS radar loop. This whole complex of moisture and embedded disturbances will continue moving north-northeast through the day. MLCAPE looks to be 400-800 J/Kg this afternoon, or perhaps a little higher for areas that see good daytime heating. Warm cloud layer reaches 10k ft and storm motions will initially be rather slow, under 20 kts with the potential for some training, back building or stalling heading into this afternoon and evening. An isolated instance of this has already happened over southeast PA early this morning, where back building thunderstorms developed on the northern edge of the instability/moisture gradient and produced a radar estimated 2-3"+....this same gradient will move north into our area this afternoon. With this in mind, WPC has placed a Slight Risk for Excessive Rainfall across portions of NE PA, including the Wyoming Valley NW into southern Bradford County...with a Marginal Risk further north to include the NY Southern Tier and Catskills. Rainfall amounts will average 0.25 to 0.75 inches over the area; but localized amounts of 2-3"+ cannot be ruled out. Flash-flood guidance is around 2"/hr in the counties outlined under the Marginal & Slight Risks from WPC. SPC has only general thunder over the area, with no widespread severe storms anticipated. By late evening and overnight model guidance shows a shortwave/meso low passing over the region continuing the steadier rain threat. Eventually this pulls east-northeast and out of the area by daybreak Tuesday, with just some backside, wrap around scattered showers remaining. Otherwise, it will be a muggy night with lows in the mid to upper 60s for most locations. Lowered PoPs on Tuesday compared to the NBM; as mentioned above just a few lingering showers in the morning possible. Then, turning partly sunny, warm and humid in the afternoon with highs in the upper 70s to mid-80s expected. This produces MLCAPE of 500-1000 J/kg, so there will be plenty of instability around. Deep layer shear is modest, between 20-30 kts. A weak disturbance pushing through will initiate isolated to scattered showers and t'storms in the afternoon to early evening hours, but at this time we are not expecting anything severe, and only a very low or marginal risk for any storms to produce isolated excessive rainfall. && .SHORT TERM /TUESDAY NIGHT THROUGH WEDNESDAY NIGHT/... 255 AM update... Passing weak waves will support showers and thunderstorms Tuesday night. The best chances will be from the Southern Tier and areas southward. With the environment becoming more stable after sunset, strong storms are not expected. Strong waves will move north into the region Wednesday morning and through the daytime hours. Southwest flow will help enhance moisture as showers become a bit more widespread. Modeled CAPE is 500 to 1000 J/kg but 0-6km bulk shear is fairly weak with values of just 25 to 35 kts. With showers and clouds over the region early in the day, instability may end up on the lower end of that range. Some drier air will work its way into the region Wednesday night, helping cut off showers across southern portions of our region. A cold front approaches and just enters the region from the northwest, so showers will continue for most of CNY overnight. Enough instability and shear will be present to support some thunderstorms as well. PWATs throughout this period are only expected to be 1.5 to 1.75 inches, which isn't that abnormal for this time of year. More moisture rich showers/storms will be closer to the coast where a stationary front sets up. Within thunderstorms, heavier showers will be possible. Hydro issues are not expected at this time, though that will depend on how much rain falls tonight and Tuesday. Temperatures will only fall into the 60s both Tuesday and Wednesday nights. Highs will be in the upper 70s to mid 80s on Tuesday. && .LONG TERM /THURSDAY THROUGH SUNDAY/... 255 AM update... The aforementioned cold front will sweep through the region Thursday with showers and thunderstorms. The environment is expected to become unstable and strong sheared, so some thunderstorms may be on the stronger side. This front will exit the region prior to Friday morning. Similarly to the midweek period, rainfall earlier in the week could be a factor into whether or not there will be any hydro issues. WPC does keep the region in a marginal risk for excessive rainfall for Thursday. Surface high pressure builds into the region following the frontal passage on Friday. An upper-level trough will pass through the region and will try to force some spotty showers with the help of wraparound moisture from a departing low in upper parts of New England. Otherwise, dry conditions are expected with the high pressure in control through the weekend. Highs to finish out the work week will be in the 70s and 80s with a slight cool down expected after the cold front moves through. Lows both nights will be in the 50s and 60s. As an upper-level ridge builds over the eastern half of CONUS, temperatures will then trend warmer through the weekend. Highs will climb into the 80s and may be pushing 90 on Sunday. && .AVIATION /14Z MONDAY THROUGH FRIDAY/... 650 AM Update VFR conditions will then prevail through midday or early afternoon before showers and sct'd thunderstorms move in from south to north for the late afternoon and evening hours. Included PROB30 groups for t'storms at all taf sites; generally ranging from 21z to 02z at AVP, ELM, ITH, BGM and a little later 23z to 04z Tuesday at SYR and RME. Any thunderstorms can produce heavy rainfall, reducing vsbys to IFR or worse briefly. After the thunderstorms in the evening, it will taper off to showers, drizzle and patchy fog. CIGs lower to MVFR Fuel Alt or IFR for all terminals, except SYR after about 06-09z tonight/Tuesday morning. The highest IFR probabilities in this time period will be BGM and ITH, but still moderate to high for ELM and AVP as well. RME looks to stay mainly MVFR Fuel Alt, with SYR VFR to MVFR toward daybreak Tuesday morning. Outlook... Tuesday through Thursday...Several rounds of showers and thunderstorms with associated restrictions. Activity will generally be dependent on daytime heating, with best chances of rain and thunder during afternoon-evening hours. Friday...VFR conditions expected as high pressure builds in. && .BGM WATCHES/WARNINGS/ADVISORIES... PA...None. NY...None. && SYNOPSIS...MJM NEAR TERM...KL/MJM SHORT TERM...BTL LONG TERM...BTL AVIATION...JTC/MJM
Hazardous Weather Outlook National Weather Service Binghamton NY 747 AM EDT Mon Jul 22 2024 NYZ009-015>018-023-025-036-037-044>046-231200- Northern Oneida-Yates-Seneca-Southern Cayuga-Onondaga-Schuyler- Tompkins-Madison-Southern Oneida-Cortland-Chenango-Otsego- 747 AM EDT Mon Jul 22 2024 This Hazardous Weather Outlook is for central New York. .DAY ONE...Today and tonight. Hazardous weather is not expected at this time. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Scattered thunderstorms Tuesday through Thursday could produce locally heavy rainfall and/or gusty winds. A frontal passage on Thursday appears to be the best chance to see organized, stronger thunderstorms at this time. Continue to monitor the latest forecasts and outlooks as the details become more clear in the coming days. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. NYZ022-024-055>057-062-PAZ038>040-043-044-047-048-072-231200- Steuben-Chemung-Tioga-Broome-Delaware-Sullivan-Bradford-Susquehanna- Northern Wayne-Wyoming-Lackawanna-Luzerne-Pike-Southern Wayne- 747 AM EDT Mon Jul 22 2024 This Hazardous Weather Outlook is for central New York and northeast Pennsylvania. .DAY ONE...Today and tonight. Scattered showers and slow moving thunderstorms could produce locally heavy downpours this afternoon into tonight. There is at least a marginal risk for isolated instances of flash flooding. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Scattered thunderstorms Tuesday through Thursday could produce locally heavy rainfall and/or gusty winds. A frontal passage on Thursday appears to be the best chance to see organized, stronger thunderstorms at this time. Continue to monitor the latest forecasts and outlooks as the details become more clear in the coming days. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The Binghamton radar (KBGM), 58 km away, was scanning. The volume nearest the first event began at 17:07 UTC.
4 thunderstorm wind. Local standard time, as filed.
Strong thunderstorm winds knocked down trees on Route 220.
Strong thunderstorm winds knocked down trees and wires.
Strong thunderstorm winds knocked down trees in Herrick Township.
Strong thunderstorm winds knocked down trees on Route 467.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2024Every state in 2024This day in weather historyWarnings in Pennsylvania, July 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: 1191172, 1191175, 1191174, 1191176.