A strong area of low pressure moved from northern Ontario to the Saint Lawrence Valley from the day of the 13th into the evening. This low pressure system pushed a cold front into central New York which triggered severe thunderstorms which produced damaging winds.
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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 strong area of low pressure moved from northern Ontario to the Saint Lawrence Valley from the day of the 13th into the evening. This low pressure system pushed a cold front into central New York which triggered severe thunderstorms which produced damaging winds.
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 Jun 13, 1:45 PM EST, 4 hours 35 minutes earlier.
Area Forecast Discussion National Weather Service Binghamton NY 245 PM EDT Wed Jun 13 2018 .SYNOPSIS... An approaching cold front will cause thunderstorms this evening, then high pressure will build into the region, bringing drier conditions to NY and PA for Thursday through Saturday. && .NEAR TERM /THROUGH THURSDAY/... 200 PM update... SPC mesoanalysis shows 1000-1500 j/kg MLCape values pushing across Michigan toward Lake Ontario. Low clouds have subdued temperatures across NY and PA through mid-afternoon, but visible satellite shows partial clearing headed our way for late- afternoon through sunset. Given the unimpressive convection currently observed over Michigan, we pulled back a bit on thunderstorm coverage and intensity through evening. Rapid drying is forecast behind the front tonight into Thursday. However, the proximity of the upper trough to our northeastern forecast area suggests a chance of rain showers near the Western Mohawk Valley tomorrow. 1015 AM update... After beginning this morning with light precipitation and cloudy skies, partial clearing is working across Michigan toward NY and PA. While full clearing is unlikely even with very dry air punching in at the mid and high levels, MLCape values are already around 1000 j/kg over Central Michigan under partly sunny skies. Combined with decent shear (35-40 kts from 0-6km), the supercell composite has risen to 2 as of 13z. Given we are on the verge of our longest days of the year, ample time remains for the FA to destabilize. Severe thunderstorms remain possible late in the day or early this evening. New grids are published. && .SHORT TERM /THURSDAY NIGHT THROUGH SATURDAY/... 245 pm update... Fairly quiet weather conditions in the short term with a large upper level ridge of high pressure building in from the west along with the start of a very dry and warm air mass. Temperatures Friday will be seasonal with highs topping out in the mid 70s for most locations of central NY and ne PA. Low dewpoints...into the upper 40s and lower 50s...will make conditions comfortable. Clear skies Friday night/Sat morning along with light winds will make for a cool night...temperatures falling into the lower 50s. On Saturday, temperatures will be warmer...into the lower 80s with slightly higher humidity. There is some indication of a convective complex riding ewd along the nrn periphery of the upper ridge through the central/northern Great Lakes during the day. If this does occur cloud cover will likely increase across NY/PA later in the day Saturday with potentially some lingering weak convection filling in from the west by late afternoon. At this time model consensus keeps the precip out of the area until at least Sunday. This pattern is very challenging given the uncertainty with respect to where the convection will set up along the edge of the ridge...so will need to keep an eye on how this pattern eventually evolves. && .LONG TERM /SATURDAY NIGHT THROUGH TUESDAY/... 245 pm update... The upper ridge starts to get suppressed during the day Sunday and into Monday as a trough of low pressure cuts through nrn/ern Canada. The very warm and humid air mass will likely still remain over NY/PA Sunday and Monday with temperatures into the mid to upper 80s...and dew points in the mid to upper 60s. An east-west oriented boundary separating the warm/humid air to the south and the cool/dry air to the north will be the focal point for afternoon/evening convective development. The front will sag to the south some time Monday into Tuesday. There continues to be quite a bit of uncertainty regarding the timing and placement of this front...so have decided to continue with chance pops in the forecast through Tuesday. The pattern appears to become drier and slightly cooler later in the week. && .AVIATION /18Z WEDNESDAY THROUGH MONDAY/... A cold front will spread thunderstorms across the terminals this evening. Some of the storms will produce brief MVFR conditions, gusty winds, and hail, with the best chance for thunderstorms between 22z and 0z. Scattered MVFR ceilings this afternoon will give way to VFR conditions ahead of the approaching frontal system. After the storms, rapid drying is forecast. Thursday will be partly sunny with VFR conditions and gusty west winds. Outlook... Thursday night through Sunday...Mostly VFR. && .BGM WATCHES/WARNINGS/ADVISORIES... PA...None. NY...None. && SYNOPSIS...DJP NEAR TERM...DJP/MLJ SHORT TERM...BJT LONG TERM...BJT/MLJ AVIATION...DJP
Hazardous Weather Outlook National Weather Service Binghamton NY 219 PM EDT Wed Jun 13 2018 NYZ009-015>018-022>025-036-037-044>046-055>057-062-PAZ038>040-043- 044-047-048-072-141830- 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- 219 PM EDT Wed Jun 13 2018 This Hazardous Weather Outlook is for central New York and northeast Pennsylvania. .DAY ONE...This Afternoon and Tonight. Thunderstorms will impact Central New York and Northeast Pennsylvania early this evening, generally between 6 and 10 pm. Some of these storms may become severe, with localized damaging winds and hail. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed.
Special Weather Statement
National Weather Service Binghamton NY
627 PM EDT WED JUN 13 2018
NYZ022-132315-
Steuben NY-
627 PM EDT WED JUN 13 2018
...STRONG THUNDERSTORM WILL AFFECT...STEUBEN COUNTY UNTIL 715 PM
EDT...
At 626 PM EDT, Doppler radar was tracking a strong thunderstorm over
Belfast, or 15 miles northwest of Wellsville, moving east at 55 mph.
Half inch hail and wind gusts up to 50 mph will be possible with this
storm.
Locations impacted include...
Hornell, Bath, Campbell, Urbana, Canisteo, Lindley, Wayland, Painted
Post, Addison and Woodhull.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 4253 7772 4254 7766 4257 7766 4258 7717
4200 7705 4200 7775
TIME...MOT...LOC 2226Z 275DEG 47KT 4232 7809
MWGThe Binghamton radar (KBGM), 64 km away, was scanning. The volume nearest the first event began at 23:18 UTC.
9 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds knocked down trees and wires. A few electric poles were sheared off into a field.
Thunderstorm winds knocked down trees and power lines.
Thunderstorm winds knocked down large tree branches and power poles.
Thunderstorm winds knocked down trees and power lines on County Route 3A.
Thunderstorm winds knocked down trees and power lines.
Thunderstorm winds knocked down trees on Route 96.
Thunderstorm winds knocked down trees and power lines.
Thunderstorm winds knocked down trees and power lines at Tall Pines Campground.
Thunderstorm winds knocked down trees on Route 357 and Lawton Hill Road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2018Every state in 2018This day in weather historyWarnings in New York, June 2018
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: 768878, 768879, 768880, 768882, 768883, 768884, 768885, 768886, 768887.