A cold front and moved through Northeast Pennsylvania during the afternoon of the 8th. This sparked a line of severe thunderstorms across the area, mainly ahead of the front.
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 cold front and moved through Northeast Pennsylvania during the afternoon of the 8th. This sparked a line of severe thunderstorms across the area, mainly ahead of the front.
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 8, 12:53 PM EST, 1 hour 11 minutes earlier.
Area Forecast Discussion National Weather Service Binghamton NY 153 PM EDT Thu Aug 8 2019 .SYNOPSIS... A cold front will push through the region this afternoon to early evening with thunderstorms, some severe with damaging winds. Behind the front conditions will be relatively quiet with isolated rain showers Friday and Saturday afternoon. High pressure dominates the region Sunday into Monday before the pattern becomes active into the middle of next week. && .NEAR TERM /THROUGH FRIDAY/... 1245 PM Update... Severe Thunderstorm Watch has been issued for our entire area until 8 PM, except Pike-Sullivan for now. Squall line, with bowing segments, is already just about to reach into Steuben- Yates counties. We just issued our first Warnings of the day for those counties, and there will likely be others. Generally speaking the line had ignited about 1-2 hours ahead of the high resolution Convection Allowing Models (CAMS). As the line continues to march into our area which continues to undergo heating, it will be quite receptive to the instability. There is also a fair amount of downdraft convective available potential energy (DCAPE) which will promote strong gusts with the line. 1045 AM Update... Line of convection has reached far western NY-northwest corner of PA, and all expectations are for it to pick up energy thanks to the plenty of diurnal heating we currently have over our region ahead of the line. Storm Prediction Center has expanded the slight risk area across our whole general area. Thunderstorms are indeed likely; the slight risk only refers to the chance that the storms will actually be severe. Models are in pretty good agreement in the high resolution simulated reflectivity output, that the line will carry into our area 1-4 PM west of I-81 (though western Steuben-Yates could slip in just before 1PM), roughly along with I-81 corridor 3-6 PM, and to the east 4-8 PM. Forecast updated accordingly; little change overall from prior forecast. Main threat is for pockets of damaging winds within a fairly solid line of storms initially; the line may then become more gappy and scattered as it progresses further east with not quite as much instability. Previous discussion... Main concerns in the near term remain focused around the potential for thunderstorms, some possibly strong to severe, this afternoon and evening...along with early morning fog today and tomorrow...and the very low chances for rain showers in central NY Friday afternoon. Weak ridging aloft and at the surface this morning has allowed much of the cloud cover to clear out as the passing low pressure system to the east shifts further away from central NY/ne PA. Fairly decent radiational cooling, combined with widespread saturation at the surface has allowed for areas of fog this morning. Visibilities will be reduced to a half mile or less at times...especially in valley locations. The fog should lift and mix out between 8-9 am this morning. The primary concern today will be the threat for strong to severe thunderstorms this afternoon and evening along and ahead of an incoming cold front. The front will be accompanied by a fairly sharp upper level short wave...nearly co-located with the exit region of a 100 kt jet streak. The air mass ahead of the front will be able to destabilize rapidly late this morning with around 1000-1500 J/kg of ML CAPE by the early afternoon. Deep layer shear around 35 to 40 kt should allow for quickly maturing cellular convection to develop...and as the front sweeps through the storm mode should shift to linear. Small bowing line segments will be likely with the main threat being damaging winds. Most of the convection should be through the area and diminishing in intensity by 7-9 pm this evening...with only a few post-frontal rain showers hanging around through the rest of the evening. Conditions stabilize tonight and Friday morning with the potential for more valley fog until just after sunrise. A much cooler and drier air mass will advect in on Friday with highs only topping out in the lower to mid 70s. Another upper level short wave will drop in from the NW in the afternoon and should be able to interact with afternoon steep low level lapse rates enough to trigger isolated rain showers...mainly over central NY down stream of Lake Ontario. Precip amounts will be light. && .SHORT TERM /FRIDAY NIGHT THROUGH SATURDAY NIGHT/... 245 AM UPDATE... Northwest flow pattern continues into the short term. Weak wave dropping through northern NY may trigger a few showers over central NY Saturday. Drier and cooler air will drop into the area Saturday night. Made some mostly minor adjustments to the grids according to the latest guidance. Previous discussion continued below. Upper level low moves east into Ontario with upper trough extending south into the Northeast U.S on Friday. At the surface a fairly cool and mostly airmass will be in place with ridging extending into the region from surface high pressure centered over Ohio. Very weak perturbations pushing through the cyclonic NW flow aloft could kick off a few showers Friday afternoon through early Saturday morning. However, coverage of any showers will be very isolated as any development will be fighting drier air in the low levels. && .LONG TERM /SUNDAY THROUGH WEDNESDAY/... 245 AM UPDATE... Continuation of the northwest upper flow in the long term. Surface high pressure builds in the area SUnday and starts the period with dry weather. Weak wave may bring a few showers on Monday, a more important and stronger develops a closed surface low Tuesday night and Wednesday. This system will bring a better chance of showers and thunderstorms during the midweek. Have adjust the grids to reflect the latest guidance, mainly to boost the pops for the midweek system. Previous discussion continues below. Similar conditions expected on Saturday as Friday with just some isolated showers possible until the upper trough swings to our east by Saturday evening. High pressure will continue build with ridging firmly entrenched over the region by Sunday. Conditions remain relatively dry through the remainder of the weekend with low humidity and pleasant temperatures. Models are in good agreement with the next upper wave pushing through late Sunday night with low chances for rain showers into Monday as very dry air remains in the low levels with surface ridging over the region. Temperature look to remain quite pleasant through at least the first half of next week. && .AVIATION /18Z THURSDAY THROUGH TUESDAY/... Strong line of thunderstorms will carry across the NY terminals 18Z-21Z with gusts of 35-40 knots and brief fuel alternate required restrictions. This is slightly faster timing than had been previously expected. The storms will then reach KAVP between 21Z-23Z but there is more uncertainty as to the associated restrictions and gusts. After the primary line of storms, there could still be widely scattered showers/isolated thunder for a time into early evening KSYR-KRME-KITH but confidence not high enough to include in TAFs. Other than some early morning mist at KELM, generally VFR expected for the remainder of TAF period. However, restrictions cannot be totally ruled out overnight due to the added moisture provided by the storms this afternoon. If confidence increases, restrictions will be added to the TAFs. Other than the high gusts around storms, southwest winds 5-10 knots will veer westerly overnight into Friday, with some gusts of 15-20 knots by late morning. Outlook... Friday through Saturday...Mainly VFR, though a few afternoon- evening showers/isolated thunder may occur NY terminals. Saturday night through Tuesday...Mainly VFR, except predawn valley fog possible at KELM each morning. && .BGM WATCHES/WARNINGS/ADVISORIES... PA...None. NY...None. && SYNOPSIS...MDP NEAR TERM...BJT/MDP SHORT TERM...DGM/MPK LONG TERM...DGM/MPK AVIATION...BJT/MDP
Hazardous Weather Outlook National Weather Service Binghamton NY 1245 PM EDT Thu Aug 8 2019 NYZ009-015>018-022>025-036-037-044>046-055>057-PAZ038>040-043-044- 047-072-091645- Northern Oneida-Yates-Seneca-Southern Cayuga-Onondaga-Steuben- Schuyler-Chemung-Tompkins-Madison-Southern Oneida-Cortland-Chenango- Otsego-Tioga-Broome-Delaware-Bradford-Susquehanna-Northern Wayne- Wyoming-Lackawanna-Luzerne-Southern Wayne- 1245 PM EDT Thu Aug 8 2019 ...SEVERE THUNDERSTORM WATCH 562 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...Friday through Wednesday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report significant weather including any high winds, hail, or damage from storms this afternoon through early evening. NYZ062-PAZ048-091645- Sullivan-Pike- 1245 PM EDT Thu Aug 8 2019 This Hazardous Weather Outlook is for central New York and northeast Pennsylvania. .DAY ONE...This afternoon and tonight. Strong to potentially severe thunderstorms are possible late this afternoon and evening along and ahead of a passing cold front. Storms will have the potential to produce damaging winds and hail. Monitor NOAA Weather Radio for the latest information, forecasts, and warnings. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
232 PM EDT THU AUG 08 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0225 PM TSTM WND DMG ITHACA 42.44N 76.50W
08/08/2019 TOMPKINS NY 911 CALL CENTER
TREES DOWN.
&&
DJNPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
234 PM EDT THU AUG 08 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0232 PM TSTM WND DMG ELMIRA 42.09N 76.81W
08/08/2019 CHEMUNG NY 911 CALL CENTER
WIRES DOWN AND TENTS BLOWN AWAY NEAR WISNER PARK
DOWNTOWN. CORNER OF GRAY AND MAIN ST.
&&
JABPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
238 PM EDT THU AUG 08 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0235 PM TSTM WND DMG HOMER 42.64N 76.18W
08/08/2019 CORTLAND NY 911 CALL CENTER
TREE AND WIRES DOWN ACROSS ROAD.
&&
JMLPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
245 PM EDT THU AUG 08 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0240 PM TSTM WND DMG CORTLAND 42.60N 76.18W
08/08/2019 CORTLAND NY 911 CALL CENTER
SEVERAL TREES DOWN IN MULTIPLE LOCATIONS. SOME
INVOLVING WIRES.
&&
JMLPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
248 PM EDT THU AUG 08 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0247 PM TSTM WND DMG SPENCER 42.22N 76.49W
08/08/2019 TIOGA NY 911 CALL CENTER
POWERLINES DOWN IN THE AREA.
&&
JABPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
256 PM EDT THU AUG 08 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0250 PM TSTM WND DMG MCGRAW 42.59N 76.10W
08/08/2019 CORTLAND NY 911 CALL CENTER
LARGE TREE DOWN BLOCKING ROAD.
&&
JMLThe Binghamton radar (KBGM), 51 km away, was scanning. The volume nearest the first event began at 19:01 UTC.
6 thunderstorm wind. Local standard time, as filed.
Strong thunderstorm winds brought down trees.
Strong thunderstorm winds brought down trees on Post Pond Road and Jackson/Park Street.
Strong thunderstorm winds brought down numerous trees, blocking roadways.
Strong thunderstorm winds brought down trees.
Strong thunderstorm winds brought down trees and wires.
Strong thunderstorm winds brought down trees.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2019Every state in 2019This day in weather historyWarnings in Pennsylvania, August 2019
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: 851522, 851523, 851524, 851526, 851527, 851528.