A weak trough across the northern tier of NY and VT provided enough lift in a very hot and humid airmass to produce scattered thunderstorms with a few isolated pulse severe thunderstorms due to localized downburst.
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 BTV wrote it up.
A weak trough across the northern tier of NY and VT provided enough lift in a very hot and humid airmass to produce scattered thunderstorms with a few isolated pulse severe thunderstorms due to localized downburst.
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 Burlington, VT wrote its last area forecast discussion before the first event at Jun 24, 2:30 PM EST, 25 minutes earlier.
Area Forecast Discussion
National Weather Service Burlington VT
330 PM EDT Tue Jun 24 2025
.SYNOPSIS...
The significant heat ends tonight as a cold front pushes through the
region. Scattered showers and thunderstorms will occur this evening,
and a few stronger storms are possible. Drier and seasonable weather
will prevail for a couple days before rain chances increase at the
end of the week.
&&
.NEAR TERM /THROUGH WEDNESDAY NIGHT/...
As of 325 PM EDT Tuesday...The heat has been continuing today but
thankfully dew points have been lower than yesterday. This is
causing heat indices to be more in the 95-110 range instead of up to
120 like yesterday. However, these differences are relatively
insignificant based on the overall impacts of the heat and humidity,
especially since it is the second day of it and the impacts are
cumulative. Scattered showers and thunderstorms have begun to form
across the region ahead of a cold front and they should continue to
increase in coverage as the day goes on, though there will still be
a few limiting factors. There will be a significant amount of dry
air aloft, little synoptic forcing, little surface convergence and
cooling mostly restricted to the lower part of the atmosphere.
Temperatures at 500 mb do not significantly change between 12 PM
today and 12 PM tomorrow so there is not much cooling aloft to
increase mid level lapse rates. Despite these inhibiting factors,
there will be adequate CAPE present and just enough forcing to fire
off a few storms. An isolated severe storm is possible, though 0-6
KM shear is below 30 KTs for much of the day. Shear increases this
evening but the CAPE begins to decrease with the loss of solar
heating.
Temperatures will be in the 60s in most places by Wednesday morning,
except in some of the valleys in Vermont where they look to be stuck
in the 70s. However, dew points will be in the 50s and 60s so the
humidity will be noticeably lower. High pressure builds in from the
north for Wednesday and should suppress most of the precipitation to
the south. A few showers and an isolated thunderstorm are possible
in the farthest south areas, but even there it should be mostly dry.
The cooler and drier air continues to filter into the region, and
highs tomorrow will be in the upper 70s and 80s and dew points will
continue to fall through the 50s. By tomorrow night, temperatures
should be in the 50s for most places.
&&
.SHORT TERM /THURSDAY THROUGH THURSDAY NIGHT/...
As of 325 PM EDT Tuesday...Frontal zone remains parked off to our
south and west Thu/Thu nt with partly sunny skies trending more
variably cloudy over time as light warm advection begins aloft and a
surface wave passes to our south. While I can't rule out a few stray
showers across our southernmost counties, the majority of the area
should remain dry as light northerly flow should maintain a
relatively dry boundary layer. Temperatures continue to gradually
cool with highs mainly in the 70s and corresponding overnight lows
in the 50s.
&&
.LONG TERM /FRIDAY THROUGH TUESDAY/...
As of 325 PM EDT Tuesday...Latest trends continue to suggest a return
of active weather by later Friday into Saturday. Plenty of clouds
and continued seasonably cool on Friday (u60s/l70s) before enhanced
lift and a shortwave trough arrives from the northwest later in the
day and especially into the overnight hours on Saturday as the old
surface front lifts northeast. Of modest concern will be the
potential for moderate to locally heavy rainfall associated with
mainly elevated convection. Indeed, the latest deterministic output
is in broad agreement that some sort of MCS-type system will form
across the Upper Great Lakes/southern ON during early Friday and
track east-southeast toward our area in the progressive west-
northwest flow aloft. A quick look at several ensemble blends
support solid chances of a 1+ inch rainfall event during this
period, which is quite decent for this far out in terms of
convective forecasting. As such, WPC's marginal risk of excessive
rainfall looks spot on for this period.
Conditions then trend drier by Sunday into early next week as the
front lifts through the region with a more subsident, warmer airmass
returning to the region for a few days.
&&
.AVIATION /20Z TUESDAY THROUGH SUNDAY/...
Through 18Z Wednesday...VFR conditions should generally prevail for
the next 24 hours. There will be scattered showers and thunderstorms
this afternoon and if one of those reaches a terminal, it could
briefly bring visibilities down to MVFR or IFR. There is the
possibility for fog formation at MPV and SLK but that seems low at
the time. Winds will gradually turn from southwesterly and westerly
today to northwesterly tomorrow. Gusts between 10-20 KTs are
possible today before winds gradually diminish tonight.
Outlook...
Wednesday Night: VFR. NO SIG WX.
Thursday: VFR. Slight chance SHRA.
Thursday Night: VFR. Slight chance SHRA.
Friday: Mainly VFR, with local MVFR possible. Chance SHRA.
Friday Night: Mainly MVFR, with local IFR possible. Likely SHRA,
Slight chance TSRA.
Saturday: Mainly MVFR, with areas IFR possible. Likely SHRA,
Slight chance TSRA.
Saturday Night: Mainly MVFR, with areas IFR possible. Chance
SHRA.
Sunday: Mainly VFR, with local IFR possible. Slight chance SHRA.
&&
.CLIMATE...
Daily record high temperatures were achieved at climate sites
yesterday, 6-23. In addition, the all-time record at Plattsburgh
of 101 degrees was tied.
Additional record high maximum and minimum temperatures are
likely. See below for details:
Max Temp Records for 06-24
Site Forecast - Current Record
KBTV 97 (Break) - 96|2003
KMPV 93 (Break) - 89|2003 - Broken
KMSS 92 (Break) - 91|1957
KPBG 95 (Break) - 93|1975 - Broken
KSLK 90 (Tie) - 90|2003
High Min Temp Records for 06-24
Site Forecast - Current Record
KBTV 76 (Break) - 75|1894 - On Track to Tie
KMPV 71 (Break) - 65|1985 - On Track to Break
KMSS 74 (Break) - 71|1975 - On Track to Break
KPBG 71 (Break) - 70|1975 - On Track to Break
KSLK 67 (Break) - 64|1921 - On Track to Break
&&
.BTV WATCHES/WARNINGS/ADVISORIES...
VT...Heat Advisory until 8 PM EDT this evening for VTZ003-004-
006>008-010-011-016>021.
Extreme Heat Warning until 8 PM EDT this evening for VTZ001-
002-005-009.
NY...Heat Advisory until 8 PM EDT this evening for NYZ026-027-
029>031-034-087.
Extreme Heat Warning until 8 PM EDT this evening for NYZ028-
035.
&&
SYNOPSIS...Myskowski
NEAR TERM...Myskowski
SHORT TERM...JMG
LONG TERM...JMG
AVIATION...Myskowski
CLIMATE...Team BTVHazardous Weather Outlook National Weather Service Burlington VT 214 PM EDT Tue Jun 24 2025 NYZ026-027-029>031-034-087-VTZ003-004-006>008-010-011-016>021-251000- Northern St. Lawrence-Northern Franklin-Southeastern St. Lawrence- Southern Franklin-Western Clinton-Western Essex- Southwestern St. Lawrence-Orleans-Essex-Lamoille-Caledonia- Washington-Orange-Western Rutland-Eastern Franklin- Eastern Chittenden-Eastern Addison-Eastern Rutland-Western Windsor- Eastern Windsor- 214 PM EDT Tue Jun 24 2025 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... This Hazardous Weather Outlook is for northern New York, central Vermont, northeast Vermont, northwest Vermont and southern Vermont. .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. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Showers and thunderstorms are expected to affect the region Friday night into Saturday. Some of these storms may produce locally excessive rainfall. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. NYZ028-035-VTZ001-002-005-009-251000- Eastern Clinton-Eastern Essex-Grand Isle-Western Franklin- Western Chittenden-Western Addison- 214 PM EDT Tue Jun 24 2025 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING... This Hazardous Weather Outlook is for northern New York, central Vermont and northwest Vermont. .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. Extreme Heat Warning. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Showers and thunderstorms are expected to affect the region Friday night into Saturday. Some of these storms may produce locally excessive rainfall. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
Special Weather Statement
National Weather Service Burlington VT
301 PM EDT Tue Jun 24 2025
NYZ026-029-087-241945-
Northern St. Lawrence NY-Southeastern St. Lawrence NY-
Southwestern St. Lawrence NY-
301 PM EDT Tue Jun 24 2025
...A STRONG THUNDERSTORM WILL IMPACT NORTHERN ST. LAWRENCE COUNTY
THROUGH 345 PM EDT...
At 259 PM EDT, Franktown radar indicated a strong thunderstorm near
Ogdensburg, moving east at 35 mph.
HAZARD...Wind gusts of 40 to 50 mph possible.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Norwood, Canton Village, Potsdam Village, Potsdam, Waddington,
Stockholm, Pierrepont, Ogdensburg, Madrid, Canton, Norfolk,
Oswegatchie, Parishville, Lisbon, North Stockholm, Morley, West
Parishville, West Stockholm, West Potsdam, and Chipman.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Boaters on the St. Lawrence River should head to shore.
&&
LAT...LON 4478 7478 4450 7500 4470 7550 4471 7549
4471 7547 4474 7545 4473 7543 4475 7540
4476 7542 4477 7541 4478 7536 4480 7534
4482 7531 4484 7529 4485 7525
TIME...MOT...LOC 1859Z 289DEG 30KT 4478 7543
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
JMGSpecial Weather Statement
National Weather Service Burlington VT
347 PM EDT Tue Jun 24 2025
NYZ028-031-VTZ001-242030-
Eastern Clinton NY-Western Clinton NY-Grand Isle VT-
347 PM EDT Tue Jun 24 2025
...A STRONG THUNDERSTORM WILL IMPACT NORTHERN CLINTON AND NORTHERN
GRAND ISLE COUNTIES THROUGH 430 PM EDT...
At 347 PM EDT, Doppler radar was tracking a strong thunderstorm over
Moira, moving east at 15 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Mooers Village, Champlain Village, Rouses Point, Mooers, Clinton,
Ellenburg, Champlain, Altona, Churubusco, Ellenburg Depot, Irona,
Mooers Forks, Cannon Corners, Ellenburg Center, and Perry Mills.
This includes Interstate 87 between mile markers 173 and 175.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4480 7389 4496 7401 4500 7391 4501 7332
TIME...MOT...LOC 1947Z 284DEG 12KT 4482 7458
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
KutikoffSpecial Weather Statement
National Weather Service Burlington VT
349 PM EDT Tue Jun 24 2025
NYZ026-027-030-242030-
Northern St. Lawrence NY-Northern Franklin NY-Southern Franklin NY-
349 PM EDT Tue Jun 24 2025
...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN FRANKLIN AND
EASTERN ST. LAWRENCE COUNTIES THROUGH 430 PM EDT...
At 349 PM EDT, Doppler radar was tracking a strong thunderstorm over
Moira, moving east at 15 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Brushton, Bangor, Moira, Brandon, Dickinson, Lawrence, Malone,
Brasher, West Bangor, North Bangor, and Lawrenceville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4477 7465 4487 7463 4485 7431 4470 7434
TIME...MOT...LOC 1949Z 284DEG 12KT 4482 7456
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
KutikoffThe Ft Drum radar (KTYX), 111 km away, was scanning. The volume nearest the first event began at 19:54 UTC.
6 thunderstorm wind. Local standard time, as filed.
A few trees and many branches downed by thunderstorm winds in the West Potsdam vicinity, including Baghdad Road.
Tree and numerous branches downed by thunderstorm winds along Mud Pond road.
Tree and numerous branches downed by thunderstorm winds along Reservoir road in West Peru.
Tree and numerous branches downed by thunderstorm winds along Hallock Hill Road in Harkness.
Thunderstorm winds knocked down tree and utility lines along Mason road.
Trees and several branches down in West Pierrepont.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2025Every state in 2025This day in weather historyWarnings in New York, June 2025
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: 1256571, 1256572, 1256573, 1256575, 1256693, 1257531.