Alert archive / New York / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 25, NWS Buffalo, NY

July 13, 2023Cayuga County, Oswego County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 13, 2023, 2:08 PM EDT for Cayuga County, Oswego County, New York. It was in force for 67 min. 6 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 13, 2023, 2:08 PM EDT (18:08 UTC)
Expired
Jul 13, 2023, 3:15 PM EDT
In force
67 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Cayuga County, NY, Oswego County, NY

The radar

The Ft Drum radar (KTYX), 65 km from the middle of the area, began a volume at 18:11 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Jul 13, 2:11 PM EDTTSTM WND DMGFulton, NYTrees and wires down.
Jul 13, 2:11 PM EDTTSTM WND DMGFulton, NYTrees and wires down.
Jul 13, 2:16 PM EDTTSTM WND DMGWilliamstown, NYTrees and wires down.
Jul 13, 2:16 PM EDTTSTM WND DMGWilliamstown, NYTrees and wires down.
Jul 13, 2:36 PM EDTTSTM WND DMG2 Ssw Parish, NYTrees and wires down.
Jul 13, 2:36 PM EDTTSTM WND DMG2 Ssw Parish, NYTrees and wires down.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 4 storm reports to this severe thunderstorm warning; the first came 3 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 13, 12:43 PM EDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 6.1 hours before the alert went out and 211 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Buffalo Intl Airport, NY at 12:00Z on 2023-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 448 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 12:00Z on 2023-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 240 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
448 J/kg
Mixed-layer CIN
-54 J/kg
Mixed-layer LCL
1038 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
240 m²/s²
0-3 km storm-relative helicity
246 m²/s²
Significant tornado parameter
0.4
Supercell composite
3.9

Open this sounding in Storm Lab

The text

As transmitted.

159 
WUUS51 KBUF 131808
SVRBUF
NYC011-075-131915-
/O.NEW.KBUF.SV.W.0025.230713T1808Z-230713T1915Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
208 PM EDT Thu Jul 13 2023

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Cayuga County in central New York...
  Oswego County in central New York...

* Until 315 PM EDT.

* At 208 PM EDT, a severe thunderstorm was located over Cato, or 10
  miles west of Baldwinsville, moving east at 30 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Expect wind damage 
           to trees and power lines.

* Locations impacted include...
  Oswego, Fulton, Pulaski, Central Square, Redfield, Cato, Selkirk
  Shores State Park, Mexico Point State Park, Nine Mile Point, and
  Battle Island State Park.

This includes Interstate 81 between exits 32 and 36.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail, damaging wind, and continuous cloud to ground lightning
are 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 4348 7581 4333 7589 4331 7586 4316 7588
      4320 7608 4323 7610 4327 7620 4324 7621
      4322 7619 4320 7621 4324 7626 4320 7627
      4323 7631 4323 7648 4314 7649 4311 7647
      4308 7662 4351 7653 4369 7578 4347 7576
TIME...MOT...LOC 1808Z 253DEG 28KT 4319 7653 

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

$$

Mitchell
2 follow-up statements
610 
WWUS51 KBUF 131842
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
242 PM EDT Thu Jul 13 2023

NYC011-131850-
/O.CAN.KBUF.SV.W.0025.000000T0000Z-230713T1915Z/
Cayuga NY-
242 PM EDT Thu Jul 13 2023

...THE SEVERE THUNDERSTORM WARNING FOR CAYUGA COUNTY IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
central New York.

LAT...LON 4348 7581 4333 7589 4331 7586 4316 7588
      4320 7608 4323 7610 4327 7620 4324 7621
      4322 7619 4320 7621 4324 7626 4320 7627
      4323 7631 4323 7634 4336 7632 4361 7613
      4369 7578 4347 7576
TIME...MOT...LOC 1840Z 255DEG 27KT 4324 7622 

$$

NYC075-131915-
/O.CON.KBUF.SV.W.0025.000000T0000Z-230713T1915Z/
Oswego NY-
242 PM EDT Thu Jul 13 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT
FOR OSWEGO COUNTY...

At 240 PM EDT, a severe thunderstorm was located near Brewerton, or 8
miles northeast of Baldwinsville, moving east at 30 mph.

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

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Expect wind damage to 
         trees and power lines.

Locations impacted include...
Pulaski, Central Square, Redfield, Hastings, Richland, Constantia,
West Monroe, Palermo, Phoenix, and Mexico.

This includes Interstate 81 between exits 32 and 36.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4348 7581 4333 7589 4331 7586 4316 7588
      4320 7608 4323 7610 4327 7620 4324 7621
      4322 7619 4320 7621 4324 7626 4320 7627
      4323 7631 4323 7634 4336 7632 4361 7613
      4369 7578 4347 7576
TIME...MOT...LOC 1840Z 255DEG 27KT 4324 7622 

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

$$

Mitchell
694 
WWUS51 KBUF 131914
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
314 PM EDT Thu Jul 13 2023

NYC075-131924-
/O.EXP.KBUF.SV.W.0025.000000T0000Z-230713T1915Z/
Oswego NY-
314 PM EDT Thu Jul 13 2023

...THE SEVERE THUNDERSTORM WARNING FOR OSWEGO COUNTY WILL EXPIRE AT
315 PM EDT...
                
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 will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
central New York.

LAT...LON 4348 7581 4333 7589 4331 7586 4316 7588
      4320 7608 4323 7610 4327 7620 4324 7621
      4322 7619 4320 7621 4324 7626 4320 7627
      4323 7631 4323 7634 4336 7632 4361 7613
      4369 7578 4347 7576
TIME...MOT...LOC 1914Z 253DEG 28KT 4331 7590 

$$

Mitchell

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Buffalo, NY wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 13, 1:54 PM EDT, 14 minutes earlier.

Area forecast discussion, Jul 13, 1:54 PM EDT, 14 minutes before
Area Forecast Discussion
National Weather Service Buffalo NY
154 PM EDT Thu Jul 13 2023

.SYNOPSIS...
Showers and some strong thunderstorms will be possible with
localized heavy rain and gusty winds...mainly east of Rochester
and particularly across the North country this afternoon.
Generally fair weather will then follow for tonight and
Friday...as weak high pressure will be found over the region.
Looking ahead to the weekend...it will be somewhat unsettled
with some showers and thunderstorms...but there should be plenty
of dry time as well.

&&

.NEAR TERM /THROUGH FRIDAY/...
Robust mid-level shortwave and sfc reflection passing by just to our
N-NWest through southeast Ontario Canada. The trailing cold front is
now working from west to east through the CWA.

As the frontal boundary moves east...it will generate showers
and possible SVR thunderstorms (damaging winds)...along with
some heavy rain. The bulk of this activity will be found east
of Lake Ontario this afternoon. SPC has issued a SVR
Thunderstorm Watch for this threat into early this evening.
Also...a Flood Watch remains in effect from Ontario and Wayne
counties eastward...although confidence is notably LOWER for
excessive rains to materialize. Again...a prominent factor with
the current flood watch is the wet antecedent conditions from
the heavy rains from early in the week. Otherwise...diurnally
based instability in conjunction with a modest 35-40 knot low
level will be the support for the strong organized
convection...and with dry air in the mid levels...there will be
an enhanced downburst potential. Have kept heavy rain and gusty
winds as enhanced wording in the grids.

Meanwhile...mainly dry weather will be found back across the far
western counties this afternoon behind the front. It will be quite
breezy...especially downwind of Lake Erie where winds could gust as
high as 40 mph.

Tonight...any showers and storms over the eastern parts of the
forecast area should die off fairly quickly with continued drying in
the mid levels and nocturnal stabilization being enhanced well behind
an exiting cool front.

Fair dry weather can then be expected for the vast majority of the
region on Friday...as weak high pressure will be centered just to
our east. That being said...slightly higher Td's will assist in
making the environment over the Finger Lakes and parts of the
Srn Tier and North country prone to widely separated showers and
thunderstorms during the afternoon.

&&

.SHORT TERM /FRIDAY NIGHT THROUGH SATURDAY NIGHT/...
Through the weekend, the core of a large closed upper low initially
located just west of Hudson Bay Friday night will will retrograde
westward into northern Manitoba through Saturday, before pivoting
south then southeastward into southern Ontario, being centered just
north of Lake Superior by Sunday night. While this will shift the
stagnant longwave pattern east a bit, synoptic troughing will still
extend across the Great Lakes and much of the northeastern CONUS
through the period and even into next week. Shortwave impulses
rotating through the base of this trough will maintain an unsettled
weather pattern across the region.

Focusing on the weekend, a ridge of weak surface high pressure
extending from the Tennessee Valley to the eastern Great Lakes will
drift eastward Friday night. Upstream, the next shortwave trough
will be racing east across the central Great Lakes to southern
Ontario, though it will be largely moisture starved and likely
amount to little more than increased cloud cover overnight. That
being said, an isolated shower or two before daybreak across the
western zones can't be ruled out. Southerly return flow will develop
as the surface high moves east of the region, giving temps a small
boost over the previous night with lows in the low to mid 60s.

Thin surface ridge will settle along the east coast by Saturday
afternoon. Another upstream shortwave trough and associated cold
front over the Ohio Valley will be pivoting northeast towards New
England, lifting a warm front through the eastern Great Lakes
sometime in the morning. Increasing warm advection and diurnal
heating out ahead of it will yield temps in the upper 80s across the
Finger Lakes/North Country as dewpoints swell into the upper 60s and
even low 70s. Showers and thunderstorms are expected to blossom with
diurnal convection in the afternoon, with higher chances across the
western counties in closer proximity to the incoming shortwave
trough. A bit challenging to nail down how convection will unfold in
the warm sector throughout the day at this juncture. There is
uncertainty in timing of the shortwave/cold front, and how much
moisture is able to pool into the region in time for peak daytime
instability, though guidance continues to trend a bit slower with
the overall progression. PWATs in excess of 1.75" with convergent
850H-700H flow will be on the doorstep, and depending on how the
shortwave tracks, could be over the region as SBCAPE grows to a
projected 1000-2000J/kg. On top of 0-6km bulk shear in the 25-35kt
range, could see the potential for some strong to severe
thunderstorm activity and/or flooding risks during the day, though
there are many 'moving parts' that would need to come together for
this to be realized.

Better chances for more widespread showers Saturday night as the
shortwave trough and main cold front makes its way towards the
forecast area across southern Ontario and Lake Erie. More vigorous
thunderstorm activity looks less likely at this point due to the
lack of diurnal instability available. Still in the soupy airmass
ahead of the front, lows will struggle to dip below the 70s across
the Lake Plains overnight, with elevated dewpoints leading to an
extra muggy feel.

Cold front will lie across WNY by Sunday morning, then continue its
eastward trek to central NY through the day. Additional shower and
thunderstorm development is expected through the day, with chances
being higher across the Finger Lakes and North Country just ahead of
the advancing front, and in the afternoon as SB instability
increases. Still looks like a good amount of shear and PWATs to work
with in the environment to pose a threat for isolated strong to
severe storms and flooding if/where storms are able to train, so
threats will continue to be monitored going forward. Otherwise, the
region will cool off some through remain humid behind the front with
temps in the low/mid 80s.

Much quieter weather expected Sunday night as the front moves east
of the forecast area and a sharply drier airmass filters into the
region. Lows will be in the low to mid 60s, with a notable drop in
Td's.

&&

.LONG TERM /SUNDAY THROUGH WEDNESDAY/...
Moving into the new workweek, the center of the broad closed low
will be pivoting eastward across southern Ontario Province. Longwave
troughing will remain in place across the northeast through midweek,
as additional shortwave disturbances as well as the axis of the main
trough impinge upon the forecast area. This will lead to another
couple of frontal passages between Monday and Tuesday, before the
core of the main trough opens up and FINALLY ejects east into Quebec
by Wednesday. Difficult to pin down the details at this range, but
expect additional chances for showers and thunderstorms Monday
through Tuesday, with greater chances Tuesday afternoon during peak
heating, then drying out Tuesday night through Wednesday.

Temperatures will be on the warmer side Monday and Monday night,
then cooling off behind the frontal passages with a return to more
seasonable temps for Tuesday/Wednesday.

&&

.AVIATION /18Z THURSDAY THROUGH TUESDAY/...
Mainly VFR conditions can be expected today...although sfc winds
will strengthen with gusts over 30-35 knots expected at many of the
TAF sites...especially at KBUF and KIAG. Strong thunderstorms will
be possible over the western Finger Lakes and eastern Lake Ontario
regions during this afternoon. This will likely impact KART and
KGTB.

Mainly VFR weather is expected tonight.

Outlook...

Friday through Tuesday...Mainly VFR with a chance of showers
and thunderstorms.

&&

.MARINE...
Small craft advisories are in effect for ALL of the NY Nearshore
waters today. The strongest of these winds will be on Lake Erie and
in the Buffalo harbor.

The greatest risk for thunderstorms will be across Lake Ontario
today...this as the cold front works from west to east.

Showers and storms will diminish tonight along with winds relaxing
allowing for minimal wave action as we head into Friday.

&&

.BUF WATCHES/WARNINGS/ADVISORIES...
NY...Flood Watch until 11 PM EDT this evening for NYZ004>006-008-
     014.
     Beach Hazards Statement until 8 PM EDT this evening for NYZ006.
     Beach Hazards Statement until 11 PM EDT this evening for
     NYZ007.
     Beach Hazards Statement until 6 PM EDT this evening for NYZ010-
     019-085.
MARINE...Small Craft Advisory until 6 PM EDT this evening for LEZ020.
         Small Craft Advisory until 8 PM EDT this evening for
         LEZ040-041.
         Small Craft Advisory until 6 PM EDT this evening for
         LOZ042.
         Small Craft Advisory until 8 PM EDT this evening for
         LOZ043-044.
         Small Craft Advisory until 11 PM EDT this evening for
         LOZ045.

&&

SYNOPSIS...AR/RSH
NEAR TERM...AR/RSH
SHORT TERM...PP
LONG TERM...EAJ/PP
AVIATION...AR
MARINE...AR/RSH
Hazardous weather outlook, Jul 13, 1:00 PM EDT, 1 hour 8 minutes before
Hazardous Weather Outlook
National Weather Service Buffalo NY
100 PM EDT Thu Jul 13 2023

NYZ010-141700-
Northern Erie-
100 PM EDT Thu Jul 13 2023

...BEACH HAZARDS STATEMENT IN EFFECT UNTIL 6 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.

   Beach Hazards Statement.

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

Hazardous weather is not 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

NYZ019-085-141700-
Chautauqua-Southern Erie-
100 PM EDT Thu Jul 13 2023

...BEACH HAZARDS STATEMENT IN EFFECT UNTIL 6 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.

   Beach Hazards Statement.

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

Hazardous weather is not 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

NYZ021-141700-
Allegany-
100 PM EDT Thu Jul 13 2023

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

.DAY ONE...This afternoon and tonight.

Hazardous weather is not expected at this time.

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

Hazardous weather is not 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

NYZ014-141700-
Ontario-
100 PM EDT Thu Jul 13 2023

...FLOOD WATCH REMAINS IN EFFECT UNTIL 11 PM EDT THIS EVENING...
...SEVERE THUNDERSTORM WATCH 481 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.

   Flood Watch.
   Severe Thunderstorm Watch.

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

Hazardous weather is not 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

NYZ008-141700-
Lewis-
100 PM EDT Thu Jul 13 2023

...FLOOD WATCH REMAINS IN EFFECT UNTIL 11 PM EDT THIS EVENING...
...SEVERE THUNDERSTORM WATCH 481 IN EFFECT UNTIL 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.

   Flood Watch.
   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

NYZ007-141700-
Jefferson-
100 PM EDT Thu Jul 13 2023

...SEVERE THUNDERSTORM WATCH 481 IN EFFECT UNTIL 8 PM EDT THIS
EVENING...
...BEACH HAZARDS STATEMENT IN EFFECT UNTIL 11 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.

   Beach Hazards Statement.
   Severe Thunderstorm Watch.

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

Hazardous weather is not 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

NYZ006-141700-
Oswego-
100 PM EDT Thu Jul 13 2023

...FLOOD WATCH REMAINS IN EFFECT UNTIL 11 PM EDT THIS EVENING...
...SEVERE THUNDERSTORM WATCH 481 IN EFFECT UNTIL 8 PM EDT THIS
EVENING...
...BEACH HAZARDS STATEMENT IN EFFECT UNTIL 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.

   Beach Hazards Statement.
   Flood Watch.
   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

LEZ020-040-041-LOZ030-042-043-062-063-141700-
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-
100 PM EDT Thu Jul 13 2023

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

LOZ044-045-064-065-SLZ022-024-141700-
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-
100 PM EDT Thu Jul 13 2023

...SEVERE THUNDERSTORM WATCH 481 IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

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

.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

NYZ001-002-011-141700-
Niagara-Orleans-Genesee-
100 PM EDT Thu Jul 13 2023

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

.DAY ONE...This afternoon and tonight.

Hazardous weather is not expected at this time.

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

Hazardous weather is not 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

NYZ003-012-013-020-141700-
Monroe-Wyoming-Livingston-Cattaraugus-
100 PM EDT Thu Jul 13 2023

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

.DAY ONE...This afternoon and tonight.

Hazardous weather is not expected at this time.

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

Hazardous weather is not 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

NYZ004-005-141700-
Wayne-Northern Cayuga-
100 PM EDT Thu Jul 13 2023

...FLOOD WATCH REMAINS IN EFFECT UNTIL 11 PM EDT THIS EVENING...
...SEVERE THUNDERSTORM WATCH 481 IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for portions of western and north
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.

   Flood Watch.
   Severe Thunderstorm Watch.

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

Hazardous weather is not 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

Reynolds

In the hours before

Special weather statement, Jul 13, 11:43 AM EDT, 2 hours 25 minutes before
Special Weather Statement
National Weather Service Buffalo NY
1143 AM EDT Thu Jul 13 2023

NYZ003-004-011>014-020-021-131645-
Cattaraugus NY-Allegany NY-Ontario NY-Livingston NY-Wyoming NY-
Wayne NY-Genesee NY-Monroe NY-
1143 AM EDT Thu Jul 13 2023

...STRONG THUNDERSTORMS WILL IMPACT WESTERN WAYNE...WYOMING...EASTERN
CATTARAUGUS...LIVINGSTON...NORTHWESTERN ALLEGANY...MONROE...EASTERN
GENESEE AND NORTHWESTERN ONTARIO COUNTIES THROUGH 1245 PM EDT...

At 1143 AM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Hilton to near Pavilion to near Ashford
Hollow. Movement was southeast at 30 mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Rochester, Greece, Irondequoit, Chili, Olean, Geneseo, East
Rochester, Hilton, Webster, Fairport, Dansville, Brighton,
Gates-North Gates, Letchworth State Park, Ontario, Henrietta,
Penfield, Le Roy, Perry, and Spencerport.

This includes the following highways...
 Interstate 390 between exits 5 and 12.
 Interstate 90 between exits 44 and 47.
 Interstate 86 between exits 25 and 29.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

These storms 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 4203 7837 4228 7881 4252 7853 4254 7846
      4258 7846 4289 7810 4338 7775 4328 7754
      4333 7730 4330 7716 4268 7755
TIME...MOT...LOC 1543Z 297DEG 26KT 4336 7773 4288 7807 4233 7872

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

EAJ
Special weather statement, Jul 13, 12:45 PM EDT, 1 hour 23 minutes before
Special Weather Statement
National Weather Service Buffalo NY
1245 PM EDT Thu Jul 13 2023

NYZ003>006-013-014-021-131745-
Allegany NY-Ontario NY-Livingston NY-Oswego NY-Wayne NY-Monroe NY-
Northern Cayuga NY-
1245 PM EDT Thu Jul 13 2023

...STRONG THUNDERSTORMS WILL IMPACT WAYNE...SOUTHEASTERN
LIVINGSTON...CAYUGA...NORTHERN ALLEGANY...SOUTHWESTERN OSWEGO...
SOUTHEASTERN MONROE AND ONTARIO COUNTIES THROUGH 145 PM EDT...

At 1244 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Fairport to near Hemlock to near Belfast.
Movement was east at 30 mph.

HAZARD...Wind gusts up to 45 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Geneva, Canandaigua, East Rochester, Fairport, Dansville, Newark,
Marion, Lyons, Palmyra, Victor, Honeoye Falls, Conesus, Bristol,
Lima, Clifton Springs, Clyde, Phelps, Belfast, Bloomfield, and
Montezuma.

This includes the following highways...
 Interstate 390 between exits 4 and 6.
 Interstate 90 between exits 42 and 45.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
central and western New York.

&&

LAT...LON 4233 7822 4277 7772 4317 7744 4327 7637
      4323 7641 4323 7648 4317 7647 4302 7662
      4301 7696 4276 7698 4276 7731 4258 7737
      4258 7766 4253 7766 4253 7772 4234 7773
TIME...MOT...LOC 1644Z 263DEG 28KT 4314 7734 4279 7764 4239 7809

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

Mitchell

The office that day

Everything else NWS Buffalo, NY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 13, 3:56 AM EDTBeach Hazards StatementBUFChautauqua, Erie, Jefferson, Oswego19 hr
Jul 13, 11:43 AM EDTSpecial Weather StatementBUFCattaraugus, Livingston, Monroe, Wyoming62 min
Jul 13, 12:08 PM EDTSpecial Marine WarningBUF52 min
Jul 13, 12:34 PM EDTSevere Thunderstorm WarningBUFMonroe, Wayne26 min
Jul 13, 12:45 PM EDTSpecial Weather StatementBUFOntario60 min
Jul 13, 12:55 PM EDTSpecial Marine WarningBUF65 min
Jul 13, 1:20 PM EDTSevere Thunderstorm WarningBUFCayuga, Oswego, Wayne55 min
Jul 13, 1:40 PM EDTSevere Thunderstorm WarningBUFJefferson, Lewis, Oswego65 min
Jul 13, 1:47 PM EDTSpecial Marine WarningBUF88 min
Jul 13, 1:57 PM EDTSpecial Marine WarningBUF36 min
Jul 13, 2:33 PM EDTSevere Thunderstorm WarningBUFJefferson, Lewis, Oswego57 min
Jul 13, 3:28 PM EDTSevere Thunderstorm WarningBUFLewis32 min

Nearby

Severe Thunderstorm Warnings in New York, 2023Every severe thunderstorm warning in 2023

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.