A strong disturbance triggered showers and thunderstorms over west-central NY including Yates and Cayuga counties. One of the storms became severe and produced an 85 mph microburst in the vicinity of Penn Yan.
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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 disturbance triggered showers and thunderstorms over west-central NY including Yates and Cayuga counties. One of the storms became severe and produced an 85 mph microburst in the vicinity of Penn Yan. Damage from this microburst included a destroyed barn and several snapped/fallen trees.
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 Apr 5, 2:33 PM EST, 57 minutes earlier.
Area Forecast Discussion National Weather Service Binghamton NY 333 PM EDT Wed Apr 5 2023 .SYNOPSIS... A warm front will bring a wide range in temperatures to the region this afternoon, along with periods of showers and thunderstorms as a few upper level disturbances roll across the area. A cold front will push east of the area Thursday morning, with drier and cooler weather expected for Friday. A dry weekend is on tap, and temperatures will begin climbing back up to near normal on Sunday, and above normal again on Monday and Tuesday. && .NEAR TERM /THROUGH THURSDAY/... 330 PM Update... A maritime layer coming from the east continues to persist over our area. A warm front associated with a low pressure system over the Great Lakes attempts to move in from the west this evening. It experiences push back from the maritime air mass, this causes the warm front to remain stationary over our area for an extended period of time. At 0Z the maritime layer starts to subside as the warm front pushes into our region with convective rain showers and thunderstorms ahead of it. Strong low level winds push warmer air aloft causing a temperature inversion, this caps our area and keeps us stable ruling out the possibility of severe thunderstorms. Stronger instability is present over the west of our CWA, if anything were to develop it would weaken once it reaches the cooler maritime airmass. A chance of scattered rain showers continue tonight with mild temperatures in the 50s and the low 60s. Cold front moves in early tomorrow morning with cooler temperatures. The front is expected to push far enough SE to limit the potential for severe thunderstorms, although NE PA could see pop up thunderstorms in the afternoon.Thursday night high pressure will dominate with clearing skies and cooler temperatures. && .SHORT TERM /THURSDAY NIGHT THROUGH SATURDAY NIGHT/... 2 PM Update... Friday a large surface high pressure system over the western Great Lakes combined with the western portion of an upper level trough will bring a NW flow across the area into Saturday. This will advect a cold Canadian airmass into the region, keeping temperatures below normal. Highs Friday and Saturday will be in the 40s across CNY with upper 40s to mid 50s over NEPA. Lows will be in the 20s Friday and Saturday nights. The surface high will slowly drift east to be centered almost overhead Saturday night. && .LONG TERM /SUNDAY THROUGH WEDNESDAY/... 2 PM Update... This period will be dominated by a strong ridge of high pressure sitting over the region, keeping conditions mostly warm and dry. The surface high moves to northeast US NE coast and stalls. Some guidance is hinting at a weak wave riding the northern edge of the ridge and bringing a some light rain showers across the northern portion of the CWA Monday night into Tuesday morning. Capped these PoPs at slight chance given the lack of model certainty and the fact that the ridge overhead should be strong enough to squash any precip trying to develop. A warming trend will occur is expected through this period, with highs on Sunday in the 50s, climbing to the 70s Wednesday. Lows in the low and mid 30s Sunday night climbs to the 40s Tuesday night. && .AVIATION /20Z WEDNESDAY THROUGH MONDAY/... All of our terminals in central NY / northeast PA were under the influence of a east to southeasterly marine layer. KBGM and KAVP were still MVFR with the rest of the terminals mixing out the lower ceilings to VFR conditions due to insolation. We expect showers and even a rumble of thunder to cross the region tonight. This combined with nighttime cooling will lead to MVFR and even locally some IFR conditions late this afternoon into tonight. Confidence is low as to where and how long the IFR conditions will last. We are most confident at KBGM and for a brief time at KSYR and KRME due to higher chance for visibility restricting showers. Then late tonight and Tammara morning we expect all terminals to range from MVFR to again IFR at BGM which will all improve to VFR late morning/early afternoon. KBGM likely will be the holdout and linger with MVFR to 18z or beyond. Winds will be southeast to south most terminals through tonight at 10 to 20 knots with some gusts to 30 or higher. KELM likely will be more southwesterly. We also have LLWS at KRME where a backed flow up the Mohawk Valley is leading to LLWS between 00z and 10z. Additionally, KAVP will likely see LLWS 02z to 14z as the marine layer is more persistent. Outlook... Thursday...Showers and associated restrictions; low chance for daytime thunderstorms. Friday through Monday...Mainly VFR expected. && .BGM WATCHES/WARNINGS/ADVISORIES... PA...None. NY...None. && SYNOPSIS...MPH NEAR TERM...ES SHORT TERM...JTC/TAC LONG TERM...JTC/TAC AVIATION...DJN
Hazardous Weather Outlook National Weather Service Binghamton NY 321 PM EDT Wed Apr 5 2023 NYZ009-017-018-023>025-036-037-044>046-055>057-062-PAZ038>040-043- 044-047-048-072-061930- Northern Oneida-Southern Cayuga-Onondaga-Schuyler-Chemung-Tompkins- Madison-Southern Oneida-Cortland-Chenango-Otsego-Tioga-Broome- Delaware-Sullivan-Bradford-Susquehanna-Northern Wayne-Wyoming- Lackawanna-Luzerne-Pike-Southern Wayne- 321 PM EDT Wed Apr 5 2023 This Hazardous Weather Outlook is for central New York and northeast Pennsylvania. .DAY ONE...This afternoon and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. NYZ015-016-022-061930- Yates-Seneca-Steuben- 321 PM EDT Wed Apr 5 2023 This Hazardous Weather Outlook is for central New York. .DAY ONE...This afternoon and tonight. A few strong to severe thunderstorms may work into the area this evening, with damaging winds possible. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed. Please relay any information about severe weather to the NWS while following local, state and CDC guidelines.
Special Weather Statement
National Weather Service Binghamton NY
102 PM EDT Wed Apr 5 2023
NYZ009-051730-
Northern Oneida NY-
102 PM EDT Wed Apr 5 2023
...A strong thunderstorm will impact portions of northwestern Oneida
County through 130 PM EDT...
At 101 PM EDT, Doppler radar was tracking a strong thunderstorm near
Camden, moving northeast at 40 mph.
HAZARD...Wind gusts up to 40 mph and half inch 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...
Camden, Florence, Ava, Taberg, Point Rock, North Western, Pixley
Falls State Park and Glenmore.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4335 7530 4329 7562 4329 7572 4327 7573
4325 7585 4328 7587 4332 7587 4332 7588
4342 7585 4347 7576 4342 7553 4348 7539
TIME...MOT...LOC 1701Z 239DEG 46KT 4335 7583
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH
AJGSpecial Weather Statement
National Weather Service Binghamton NY
406 PM EDT Wed Apr 5 2023
NYZ016>018-052045-
Onondaga NY-Southern Cayuga NY-Seneca NY-
406 PM EDT Wed Apr 5 2023
...A strong thunderstorm will impact portions of northwestern Seneca,
northern Cayuga and western Onondaga Counties through 445 PM EDT...
At 406 PM EDT, Doppler radar was tracking a strong thunderstorm near
Phelps, or near Waterloo, moving east at 40 mph.
HAZARD...Wind gusts up to 45 mph and half inch 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...
Auburn, Van Buren, Baldwinsville, Seneca Falls, Waterloo, Owasco,
Sennett, Fleming, Skaneateles and Marcellus.
This includes the following highway exits...
Interstate 90 near 41.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4318 7632 4283 7625 4285 7698 4287 7698
4287 7696 4301 7697 4302 7678 4303 7650
4310 7650 4311 7647 4313 7648 4315 7648
TIME...MOT...LOC 2006Z 262DEG 40KT 4296 7694
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH
AJGThe Binghamton radar (KBGM), 103 km away, was scanning. The volume nearest the first event began at 20:31 UTC.
5 thunderstorm wind. Local standard time, as filed.
Strong thunderstorm winds knocked down a large tree in a backyard.
Strong thunderstorm winds knocked down a large tree onto Sunset Ave.
First location surveyed was a horse barn with the north side open and it looked like the building was perfectly exposed to the strong winds from the north-northwest to blow the building apart with debris spread to a 155 to 160 degree direction. Looking at post in the ground the mud was soft and waterlogged so it likely did not take as much force to destroy the building so a lower wind estimate was used at 80 mph.
To the west along City Hill Road there were several medium to large pines that had |either been snapped or uprooted also in a 155 to 160 degree direction. Many of the uprooted trees had a shallow root ball and the hole left by the root ball in the ground was filled with water. To the north along Ridge Road, power poles were either tilting or snapped. The power poles were thinner and older so a lower wind estimate was used resulting in the 85 mph rating.
Multiple pine trees were also snapped or uprooted at several homes along Ridge Road as well, falling in the 155 to 160 degree direction as well. One home had a chimney that toppled over. Talking to a couple home owners that were home at the time of the |microburst, the stories matched up with strong winds and heavy rain occurring at the same time resulting in white out conditions similar to a blizzard. The stories as well as all the damage and fallen trees leaning in the same direction away from the core of |the storm on radar at the time of the damage means that this was likely a microburst. The Penn Yan Mesonet station from the NYS mesonet system was on the very edge of the microburst and recorded a gust of 62 mph.
Strong thunderstorm winds knocked down a tree onto wires on Plum Point Road near the Showboat Hotel.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2023Every state in 2023This day in weather historyWarnings in New York, April 2023
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: 1086740, 1086741, 1086746, 1086744, 1086742.