A strong mesoscale convective system of thunderstorms dropped southward out of Ontario into Central NY, moving into an unusually unstable and sufficiently sheared environment. This supported severe thunderstorms with widespread damaging winds, an isolated EF1 tornado, and hail.
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 strong mesoscale convective system of thunderstorms dropped southward out of Ontario into Central NY, moving into an unusually unstable and sufficiently sheared environment. This supported severe thunderstorms with widespread damaging winds, an isolated EF1 tornado, and hail. Heavy rainfall also occurred as deep moisture surged northward from the Ohio Valley.
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 30, 1:04 PM EST, 1 hour 3 minutes earlier. Its key messages:
Area Forecast Discussion
National Weather Service Binghamton NY
204 PM EDT Tue Jun 30 2026
.WHAT HAS CHANGED...
Upgraded the extreme heat watch to a warning for Wednesday
through Friday.
&&
.KEY MESSAGES...
1) Heat and humidity becomes unhealthy and dangerous in some areas
for the rest of this week.
2) Several rounds of scattered thunderstorms could occur through
the week and into the weekend. Severe weather and locally heavy
rainfall and flooding will be possible within the favorable
warm and humid conditions.
&&
.DISCUSSION...
KEY MESSAGE 1...
A extreme heat warning has been issued for the entire region
with significant changes to the model guidance and forecast
temperatures. Temperatures in the upper 90s and even a few 100
degree reading will be possible in the urban valleys across the
region. The only caveat will be the potential for convection
over the coming days that could ease the heat. Today, we are
seeing this happen with remnants of an MCS this morning
providing clouds over central NY and limiting heating, and
another complex dropping out of southern Ontario this afternoon
that will further limit heating.
Weds- Thurs are looking like the hottest days of the week, with
enough of the sensitive demographic areas (cities and deep
valleys) still within the crosshairs of extreme heat criteria in
the 105 to 110 degree range. Friday will be a little cooler, but
likely the urban area could still see 105 degree heat indices.
KEY MESSAGE 2...
Ring of fire weather pattern over the coming days as we will be
close to the periphery of the upper ridge. Several embedded
perturbations associated with prior upstream convection will be
the kickers as they round the upper ridge. Our fate on
thunderstorms will depending on how strong and amplified the
ridge becomes this week.
For today, a severe thunderstorm watch is looking likely across
portions of central NY as a strong MCS is dropping out of
Ontario, Canada early this afternoon. Strong damaging winds will
be the main threat with this MCS, but can't rule out an isolated
tornado and hail as well. Also, although portions of the region
are in a Marginal risk for severe thunderstorms on Wednesday, it
is possible that this area gets expanded upon and could turn
into a slight risk, as the upper ridge may level out some
tomorrow. Surface based CAPE values are well outside the norm
for the Northeast over the next couple days and shear is
sufficient to develop and maintain severe weather. Excessive
rainfall is also possible with diffluent thickness fields over
our area angling back toward the moisture axis surging in from
the Ohio Valley. Upstream MCS turning through the Great Lakes
over the ridge like we are seeing this afternoon could be the
story over the coming days, so multiple rounds of thunderstorms
will be possible. Due to the extreme instability for this
region, even lasting into the nighttime hours, the potential for
a long lasting MCS or Derecho exists for somewhere in the
Northeast U.S. in the coming days, but at this time, it is not
possible to pin down timing or location, but this will be
something to monitor.
Forecasters will be monitoring upstream thunderstorm complexes
over the coming days and confidence will increase for severe
weather when we see a long lived MCS pushing across southern
Ontario, Canada, such as the case today.
Some relief appears on the horizon after Thursday as the flow aloft
turns more westerly and then pivots into more of a flat trough for
the weekend which should bring increased cloud cover, some cooling
and more unsettled showery conditions.
&&
.AVIATION /18Z TUESDAY THROUGH SUNDAY/...
A cluster of thunderstorms moving through northern NY is
expected to reach RME and skirt SYR for about 30 minutes or so
at each terminal. It is expected to bring a heavy, but brief,
bout of rain and strong gusty winds. Winds upstream at KART have
gusted 45 to nearly 50 mph and the strongest part of the storm
looks to pass over northern Oneida County and very close to RME.
Once this cluster goes through, there can be additional showers
or thunderstorms that pop up into this evening, especially
along any outflow boundary and TEMPO groups for thunderstorms
have been added to ITH and BGM to go along with the severe
thunderstorm watch.
Later tonight is expected to be mainly VFR although ceilings do
lower. MVFR or lower restrictions can't be ruled out for a time
prior to daybreak, especially around RME, ITH and ELM. Winds
become westerly toward the end of the TAF period tomorrow with
the chance of seeing additional scattered showers and
thunderstorms developing.
Outlook:
Wednesday afternoon through Sunday...Mostly VFR, but
intermittent restrictions will be possible with isolated to
scattered showers and thunderstorms each afternoon.
&&
.CLIMATE...
Current High Temperature Records:
6/30: BGM - 92 (1964), SYR - 94 (1971), AVP - 97 (1964)
7/1: BGM - 90 (2018), SYR - 94 (2018), AVP - 95 (2018)
7/2: BGM - 92 (1966), SYR - 96 (1963), AVP - 98 (1966)
Forecasts for 7/1 and 7/2 are at or near the daily records.
&&
.BGM WATCHES/WARNINGS/ADVISORIES...
PA...Extreme Heat Warning from 11 AM Wednesday to 8 PM EDT Friday
for PAZ038>040-043-044-047-048-072.
NY...Extreme Heat Warning from 11 AM Wednesday to 8 PM EDT Friday
for NYZ009-015>018-022>025-036-037-044>046-055>057-062.
Heat Advisory until 8 PM EDT this evening for NYZ015>018-
022>025-036-037-044-045-055-056.
&&
DISCUSSION...JAB/MPK
AVIATION...DK
CLIMATE...MDPHazardous Weather Outlook National Weather Service Binghamton NY 123 PM EDT Tue Jun 30 2026 NYZ062-PAZ038>040-043-044-047-048-072-011730- Sullivan-Bradford-Susquehanna-Northern Wayne-Wyoming-Lackawanna- Luzerne-Pike-Southern Wayne- 123 PM EDT Tue Jun 30 2026 ...EXTREME HEAT WARNING IN EFFECT FROM 11 AM WEDNESDAY TO 8 PM EDT FRIDAY... This Hazardous Weather Outlook is for central New York and northeast Pennsylvania. .DAY ONE...This afternoon and tonight. Isolated to scattered thunderstorms are possible as a disturbance passes. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Extreme Heat Warning. Also, isolated to scattered thunderstorms are anticipated over the coming days, especially from the shared state border counties northward into Central New York. A few storms could be strong to severe with damaging winds. .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. NYZ009-046-057-011730- Northern Oneida-Otsego-Delaware- 123 PM EDT Tue Jun 30 2026 ...SEVERE THUNDERSTORM WATCH 423 IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...EXTREME HEAT WARNING IN EFFECT FROM 11 AM WEDNESDAY TO 8 PM EDT FRIDAY... This Hazardous Weather Outlook is for central New York. .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...Wednesday through Monday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Extreme Heat Warning. Also, isolated to scattered thunderstorms are anticipated over the coming days, especially from the shared state border counties northward into Central New York. A few storms could be strong to severe with damaging winds. .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. NYZ016>018-036-037-044-045-056-011730- Seneca-Southern Cayuga-Onondaga-Madison-Southern Oneida-Cortland- Chenango-Broome- 123 PM EDT Tue Jun 30 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...SEVERE THUNDERSTORM WATCH 423 IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...EXTREME HEAT WARNING IN EFFECT FROM 11 AM WEDNESDAY TO 8 PM EDT FRIDAY... This Hazardous Weather Outlook is for central New York. .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. Heat Advisory. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Extreme Heat Warning. Also, isolated to scattered thunderstorms are anticipated over the coming days, especially from the shared state border counties northward into Central New York. A few storms could be strong to severe with damaging winds. .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. NYZ015-022>025-055-011730- Yates-Steuben-Schuyler-Chemung-Tompkins-Tioga- 123 PM EDT Tue Jun 30 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...EXTREME HEAT WARNING IN EFFECT FROM 11 AM WEDNESDAY TO 8 PM EDT FRIDAY... This Hazardous Weather Outlook is for central New York. .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. Heat Advisory. Also, strong thunderstorms will be possible this afternoon. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Extreme Heat Warning. Also, isolated to scattered thunderstorms are anticipated over the coming days, especially from the shared state border counties northward into Central New York. A few storms could be strong to severe with damaging winds. .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.
The Ft Drum radar (KTYX), 61 km away, was scanning. The volume nearest the first event began at 19:09 UTC.
4 thunderstorm wind, 4 hail, 1 tornado. Local standard time, as filed.
Strong thunderstorm winds knocked down trees and wires.
NWS survey started where there was sporadic tree damage in Pittsfield and south for a few miles before reaching an area that had much more concentrated damage. A narrow corridor of damage was found just off County highway 46 a few hundred yards into the |woods. This concentrated area of damage followed the road. Accounts of residents helped confirm that this was likely a tornado. Damage became more sporadic downhill towards Elm Grove and State Route 51, but was still in line with the damage |observed already. In West Laurens, the amount of tree damage picked up, likely from outflow winds in town. Headed south of town down Crawford |Road, the damage became more concentrated once again. Many of the |trees along and east of Crawford road were also falling in a southwest |direction with tree damage not concentrated and more random. |West of Crawford, another concentrated corridor of tree damage was found, with vortex intensifying as it crossed a large, open yard before it headed into the forest once again. |Over the top of the hill, the broken off trees continued down |past a lake where the significant tree damage quickly came to an |end. With the lack of any damage corridors or trees falling in a convergent|pattern after this point, this was found to be the end of the |track.
Strong thunderstorm winds brought down multiple trees and wires down with vehicles caught in between.
Strong thunderstorm winds brought trees down near county route 10.
Strong thunderstorm winds brought multiple trees down in Downsville.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2026Every state in 2026This day in weather historyThe tornado archive for New York, 2026Warnings in New York, June 2026
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: 1351584, 1354453, 1354434, 1354443, 1350116, 1350117, 1350118, 1354447, 1351576.