Severe Thunderstorm Warning 42, NWS Buffalo, NY

988 
WWUS51 KBUF 111940
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
340 PM EDT Thu Jun 11 2026

NYC051-055-069-117-112015-
/O.CON.KBUF.SV.W.0042.000000T0000Z-260611T2015Z/
Wayne NY-Livingston NY-Monroe NY-Ontario NY-
340 PM EDT Thu Jun 11 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR SOUTHWESTERN WAYNE...NORTHEASTERN LIVINGSTON...SOUTHEASTERN
MONROE AND NORTHERN ONTARIO COUNTIES...

At 339 PM EDT, a severe thunderstorm was located over Honeoye Falls,
or 12 miles southwest of Fairport, moving east at 25 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Canandaigua, Newark, Palmyra, Victor, Honeoye Falls, Bristol, Lima,
Clifton Springs, Phelps, and Bloomfield.

This includes the following highways...
 Interstate 390 near exit 11.
 Interstate 90 between exits 43 and 45.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4282 7766 4303 7773 4311 7705 4280 7700
TIME...MOT...LOC 1939Z 262DEG 21KT 4294 7755 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Welch

556 
WWUS51 KBUF 112005
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
405 PM EDT Thu Jun 11 2026

NYC051-055-112014-
/O.CAN.KBUF.SV.W.0042.000000T0000Z-260611T2015Z/
Livingston NY-Monroe NY-
405 PM EDT Thu Jun 11 2026

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN LIVINGSTON AND
SOUTHEASTERN MONROE COUNTIES IS CANCELLED...

The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

&&

LAT...LON 4281 7731 4286 7745 4301 7749 4303 7749
      4304 7737 4307 7737 4308 7736 4311 7705
      4280 7700
TIME...MOT...LOC 2004Z 260DEG 23KT 4299 7733 

$$

NYC069-117-112015-
/O.CON.KBUF.SV.W.0042.000000T0000Z-260611T2015Z/
Wayne NY-Ontario NY-
405 PM EDT Thu Jun 11 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR SOUTHWESTERN WAYNE AND NORTHERN ONTARIO COUNTIES...

At 404 PM EDT, a severe thunderstorm was located near Victor, or 7
miles north of Canandaigua, moving east at 25 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Canandaigua, Newark, Palmyra, Victor, Clifton Springs, Phelps,
Bloomfield, Farmington, East Bloomfield, and Manchester.

This includes Interstate 90 between exits 43 and 45.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 4281 7731 4286 7745 4301 7749 4303 7749
      4304 7737 4307 7737 4308 7736 4311 7705
      4280 7700
TIME...MOT...LOC 2004Z 260DEG 23KT 4299 7733 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Welch

464 
WWUS51 KBUF 112016
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
416 PM EDT Thu Jun 11 2026

NYC069-117-112025-
/O.EXP.KBUF.SV.W.0042.000000T0000Z-260611T2015Z/
Wayne NY-Ontario NY-
416 PM EDT Thu Jun 11 2026

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN WAYNE AND
NORTHERN ONTARIO COUNTIES HAS EXPIRED...

The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been allowed to expire.  However, gusty
winds are still possible with this thunderstorm.

&&

LAT...LON 4281 7731 4286 7745 4301 7749 4303 7749
      4304 7737 4307 7737 4308 7736 4311 7705
      4280 7700
TIME...MOT...LOC 2015Z 264DEG 23KT 4300 7724 

$$

Welch

Area Forecast Discussion
National Weather Service Buffalo NY
127 PM EDT Thu Jun 11 2026

.WHAT HAS CHANGED...
Severe weather risk continuing to lower for Friday for much of
western New York and the Finger Lakes.

&&

.KEY MESSAGES...
1) Above normal temperatures and high humidity today and Friday.
Warmest heat index values reaching the mid 90s and allowing for an
increased risk in heat related illnesses.

2) Scattered showers and thunderstorms are expected through Friday
evening. A few storms may become severe this afternoon,
especially across the western Southern Tier.

&&

.DISCUSSION...
KEY MESSAGE 1...Above normal temperatures and high humidity today
and Friday. Warmest heat index values reaching the mid 90s and
allowing for an increased risk in heat related illnesses.

A mid-level ridge will continue to amplify across New York state
today before exiting east into New England Friday; supporting heat
and humidity to increase across the region. 850mb temperatures will
surge into the upper positive teens Celsius, supporting surface
temperatures to climb well into the 80s, and low 90s (especially
across the inland locations of the Genesee Valley. The combination
of this heat and humidity will translate to heat index values to
surge into the mid 90s today and therefor support Heat Advisory
conditions for portions of the Finger Lakes and counties lining the
southern shore of Lake Ontario.

Heat and humidity will continue into Friday, however due to the
exiting mid-level ridge axis, and approaching surface trough and
associated cold front, heat will be limited to the eastern portions
of the area and therefore confidence in Heat Advisory criteria
continues to lower.

In the wake of the aforementioned frontal passage Friday, cooler and
more comfortable weather are expected regionwide.

KEY MESSAGE 2...Scattered showers and thunderstorms are expected
through Friday evening. A few storms may become severe this afternoon,
especially across the western Southern Tier.

A soupy warm airmass continues to remain overhead this afternoon, as
PWAT values from the 12Z sounding are 1.75 inches. Remnants from
last night's MCV/Derecho in the Midwest combined with diurnal
instability this afternoon currently passing and building across
Lake Erie and northwestern Pennsylvania as of 17Z. This activity
will continue to progress northeast and then east across the CWA
this afternoon. Stronger thunderstorms may become severe, especially
across the western Southern Tier where a Thunderstorm Watch is
already in effect through 8PM this evening. The main impacts of any
stronger/severe thunderstorm will be torrential downpours, damaging
winds and large hail.

A trough across the upper Great Lakes this afternoon, will continue
to deepen and push east into eastern Great Lakes Friday, where its
resultant cold front will slide east across the region. Ahead of the
front, the heat and humidity, an unstable airmass in addition to an
increasing wind field will support the potential for strong/severe
thunderstorms with the primary . Due to the quicker nature of the
front's arrival, the best coverage of severe thunderstorms will be
limited to the eastern reaches of the CWA. Otherwise, with PWAT
values of 1.5 inches across the area will continue to support
torrential downpours.

&&

.AVIATION /18Z THURSDAY THROUGH TUESDAY/...
The moist airmass over the region will continue through Friday ahead
of a cold front crossing the area. Within this moist airmass,
scattered showers and thunderstorms that cross the terminals will
have the potential to cause lower VSBYs within downpours. CIGs will
also vary depending on location of showers/storms and elevation
across the area. Flight categories through mid afternoon on Friday
with any lowering due to brief heavy rain to IFR are possible and
brief LIFR can't be ruled out, especially over the higher terrain.

The best chance for showers/storms today is expected for this
afternoon into the early evening mainly for areas south of Lake
Ontario, and especially south of I90. A few scattered showers will
be possible later this evening, but should be limited in coverage
and intensity. Outside of any showers/storms flight conditions will
remain mostly VFR, with some MVFR CIGs possible over the higher
terrain. West to southwest winds will continue to gust to the 20 to
25 knot range, with the strongest gusts expected for areas northeast
of Lake Erie.

Tonight, mainly VFR flight conditions are expected to continue, but
lowering CIGs to MVFR will be possible starting a few hours before
daybreak on Friday morning, especially over the higher terrain,
where some IFR levels are possible. A few scattered showers and
embedded thunderstorms can't be ruled out tonight, especially closer
to daybreak.

Friday, CIGs will lower to MVFR and IFR as a pre frontal trough and
the cold front cross the area. Showers and thunderstorms will move
into the area and expand some in coverage. Shower and storm
potential will increase from west to east. Earlier timing of the
cold frontal passage will reduce the instability available for
showers/storms to develop for the western areas. This will lead to
better timing for eastern portions of the area to have increased
daytime heating ahead of the front. Further reductions to CIGs and
VSBY will be possible within showers/storms that drop heavier rain
at times during the day on Friday. CIGs are expected to improve
during the mid to late afternoon hours behind the passing cold front
to VFR.

Outlook...

Friday night through Saturday night...Mainly VFR.

Sunday...VFR/MVFR with a chance of showers and thunderstorms.

Monday...Mainly VFR, though there is a slight chance for a few
showers.

Tuesday...Mainly VFR, MVFR possible within a few showers/storms
that may move across the area

&&

.MARINE...
10 to 15 knot winds out of the west to southwest will cause choppy
conditions through Friday, but waves are expected to remain below 3
feet. Some weakening of the winds and lowering of waves can be
expected overnight with the loss of daytime heating.

Winds will increase some briefly ahead of an with a passing cold
front on Friday. Showers and thunderstorms will also be possible
through Friday until the cold front crosses the region. The best
chance for showers and thunderstorms will be this afternoon and
early evening, and then again on Friday ahead of the passing cold
front. Friday showers and storm potential will increase from west to
east.

&&

.BUF WATCHES/WARNINGS/ADVISORIES...
NY...Heat Advisory until 8 PM EDT this evening for NYZ001>005-013-
     014.
MARINE...None.

&&

DISCUSSION...EAJ
AVIATION...SW
MARINE...SW

Hazardous Weather Outlook
National Weather Service Buffalo NY
130 PM EDT Thu Jun 11 2026

NYZ007-121730-
Jefferson-
130 PM EDT Thu Jun 11 2026

This Hazardous Weather Outlook is for portions of central New York.

.DAY ONE...This afternoon and tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

There is a Marginal Risk for severe thunderstorms Friday. Damaging
winds and large hail are the primary threats. Locally heavy rainfall
is possible.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf

NYZ004-013-014-121730-
Wayne-Livingston-Ontario-
130 PM EDT Thu Jun 11 2026

...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 8 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for portions of western 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.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Hot and humid conditions are also possible Friday. Heat index values
may reach the mid 90s.

There is a Marginal Risk for severe thunderstorms Friday. Damaging
winds and large hail are the primary threats. Locally heavy rainfall
is possible.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf

NYZ020-121730-
Cattaraugus-
130 PM EDT Thu Jun 11 2026

...SEVERE THUNDERSTORM WATCH 312 IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for portions of western 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...Friday through Wednesday.

There is a Marginal Risk for severe thunderstorms Friday. Damaging
winds and large hail are the primary threats. Locally heavy rainfall
is possible.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf

LEZ020-040-041-LOZ030-042-043-062-063-121730-
Upper Niagara River and Buffalo Harbor-
Lake Erie nearshore waters from Ripley to Dunkirk-
Lake Erie nearshore waters from Dunkirk to Buffalo-
Lower Niagara River-
Lake Ontario nearshore waters from the Niagara River to Hamlin Beach-
Lake Ontario nearshore waters from Hamlin Beach to Sodus Bay-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
130 PM EDT Thu Jun 11 2026

This Hazardous Weather Outlook is for portions of Lake Erie and Lake
Ontario.

.DAY ONE...This afternoon and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf

NYZ001>003-121730-
Niagara-Orleans-Monroe-
130 PM EDT Thu Jun 11 2026

...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 8 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for portions of western 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.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf

NYZ019-121730-
Chautauqua-
130 PM EDT Thu Jun 11 2026

...SEVERE THUNDERSTORM WATCH 312 IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for portions of western 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...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf

NYZ010>012-085-121730-
Northern Erie-Genesee-Wyoming-Southern Erie-
130 PM EDT Thu Jun 11 2026

This Hazardous Weather Outlook is for portions of western New York.

.DAY ONE...This afternoon and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf

LOZ044-045-064-065-SLZ022-024-121730-
Lake Ontario nearshore waters from Sodus Bay to Mexico Bay-
Lake Ontario nearshore waters from Mexico Bay to the Saint Lawrence
River-Lake Ontario open waters from Sodus Bay to Mexico Bay-
Lake Ontario open waters from Mexico Bay to the Saint Lawrence River-
Saint Lawrence River from Cape Vincent to Ogdensburg-
Saint Lawrence River from Ogdensburg to Saint Regis-
130 PM EDT Thu Jun 11 2026

This Hazardous Weather Outlook is for portions of Lake Ontario and
Saint Lawrence River.

.DAY ONE...This afternoon and tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

There is a Marginal Risk for severe thunderstorms Friday. Damaging
winds and large hail are the primary threats. Strong to severe wind
gusts could produce locally dangerous high waves.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf

NYZ006-008-121730-
Oswego-Lewis-
130 PM EDT Thu Jun 11 2026

This Hazardous Weather Outlook is for portions of central New York.

.DAY ONE...This afternoon and tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

There is a Slight Risk for severe thunderstorms Friday. Damaging
winds and large hail are the primary threats. Locally heavy rainfall
is possible.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf

NYZ021-121730-
Allegany-
130 PM EDT Thu Jun 11 2026

...SEVERE THUNDERSTORM WATCH 312 IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for portions of western 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...Friday through Wednesday.

There is a Slight Risk for severe thunderstorms Friday. Damaging
winds and large hail are the primary threats. Locally heavy rainfall
is possible.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf

NYZ005-121730-
Northern Cayuga-
130 PM EDT Thu Jun 11 2026

...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 8 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for portions of 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.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

There is a Slight Risk for severe thunderstorms Friday. Damaging
winds and large hail are the primary threats. Locally heavy rainfall
is possible.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf