A storm system over the Great Lakes triggered thunderstorms in the afternoon and evening across Central New York. Unstable conditions allowed for many severe storms to develop.
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 storm system over the Great Lakes triggered thunderstorms in the afternoon and evening across Central New York. Unstable conditions allowed for many severe storms to develop. Many of these storms had damaging winds knocking down trees and wires. A few also produced large hail. One storm had a microburst with winds estimated to be 80 mph, which resulted in multiple trees down and some structural damage including a sign for a credit union.
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 Jul 7, 3:11 PM EST, 56 minutes earlier.
Area Forecast Discussion National Weather Service Binghamton NY 411 PM EDT Wed Jul 7 2021 .SYNOPSIS... A Great Lakes storm system will keep showers and thunderstorms in the forecast through the end of the week. A brief dry period is possible Saturday, though another chance of showers and thunderstorms is possible on Sunday. && .NEAR TERM /THROUGH WED NIGHT/... Right now, it is fairly quiet. The hi-res models that had a slightly later start seemed to be more on track with the timing. The environment still looks favorable for some scattered, strong thunderstorms later today. In areas across the southern Finger Lakes and Susquehanna Regions and southward across NEPA, CAPE values exceed 1500 J/kg with 0-6km Bulk Shear values of 25-30 kts. While there have been one or two isolated storms to pop up, hi-res models suggest a later event, mainly this evening through tonight. Later tonight, the environment does begin to stabilize, which would limit the severe threat. However, there does appear that there will be enough instability to support some scattered thunderstorms overnight, especially across CNY. A trough over the Great Lakes moves closer to our region overnight. This will advect tropical moisture from Elsa into the area supporting another round of rain showers Thursday morning. Some model guidance does suggest the potential for some thunderstorms as well, but confidence is too low to include thunder during the morning hours when the environment will be more stable. Temperatures this afternoon are in the 80s and low 90s after clearer skies and no thunderstorm activity allowed us get closer to our forecasted highs today. Overnight lows will remain mild as temps will only fall into the 60s. && .SHORT TERM /THURSDAY THROUGH SATURDAY NIGHT/... Upper level trough will move into western NY by midday Thursday, leading to increasing shower coverage through the late morning hours. Heavier precip will be focused east of I-81 in the afternoon, especially as a low level jet noses into the Poconos and Catskills. Models/Ensembles still have considerable uncertainty over a possible "predecessor-event" band setting up over NE PA and eastern NY. this would be associated with a combination of strong low/mid level moisture advection from the LLJ and enhanced upper level diffluence being in the right entrance region of a jet streak over eastern ON/western QC and the left exit region of more subtle 50-60 knot jet streak over eastern PA into far SE NY. Some models focus the heavier precip with this feature over the Adirondacks, while others stretch it further back into NE PA. Thu AM-Thu PM precip amounts of 1-2 inches (lower end) or 2-3 inches (higher end scenario) over the far eastern CWA by themselves wouldn't be too troublesome. Flash flood risk will mainly depend on cumulative antecedent conditions. Essentially, those areas that are hard hit by locally heavy rainfall this (Wed) evening, will be far more susceptible for flooding Thursday afternoon/evening. For this reason, we decided to hold off on issuing a Flash Flood Watch until the most susceptible areas can be assessed later tonight. There's still a small chance that Elsa could continue to trend further to the west, bringing the western fringes of the deeper tropical moisture (i.e., PWAT >2.2 inches) into the Cats/Poconos Thursday Night or Friday morning, but at this point it looks like it'll remain just to our east. Otherwise, lingering rain showers will diminish west to east through Friday, with a few additional pop-up showers or thunderstorms out west later in the afternoon. Saturday looks to be dry (at last!) with temperatures mainly in the mid 70s to lower 80s. && .LONG TERM /SUNDAY THROUGH WEDNESDAY/... Continued unsettled weather is expected during the long term period with multiple chances for scattered showers and thunderstorms. A large upper level ridge will be building off the Mid-Atlantic coast and a moist southerly flow will develop across Central NY and Northeast PA. Multiple disturbances are expected to ride along the top of the ridge, leading to daily chances for scattered showers and thunderstorms. Continued to go close to NBM for PoPs, but just eliminated any mention of likely PoPs being this far out in the forecast period. A gradual warming trend is expected during the long term. Highs in the upper 70s to lower 80s are expected Sunday and Monday. Then highs in the lower to mid 80s are expected for Tuesday and Wednesday. && .AVIATION /20Z WEDNESDAY THROUGH MONDAY/... Mainly VFR conditions are expected through late tonight. However, there is a chance for scattered showers and thunderstorms this afternoon and through tonight which will bring restrictions if over terminals. The highest confidence for afternoon/evening showers and thunderstorms is at AVP, BGM, and ELM as noted by the TEMPO groups. While the other terminals could see thunderstorms as well, confidence was not high enough to include. There is an additional round of thunderstorms impacting all terminals after 01z. Again, there is the possibility for showers and thunderstorms before then but confidence was too low to include them at this time. Visibilities and ceilings will quickly fall after midnight at all terminals. IFR and Below Alt Mins are possible at all terminals, other than AVP where conditions will only fall to MVFR. With remnants of a tropical system making it's way up the coast, an increase in moisture is advected into the area, brining another round of rain showers to all terminals tomorrow morning. Winds will remain fairly light, though may be gusty this afternoon/evening, especially in thunderstorms. Outlook... Thursday through Friday...Daily showers and thunderstorms possible with associated intermittent restrictions, especially Thursday afternoon-evening. Friday night through Saturday...Mainly VFR; small chance of a shower/brief restriction. Sunday through Monday...Mainly VFR; chance for showers/thunderstorms and associated restrictions. && .BGM WATCHES/WARNINGS/ADVISORIES... PA...None. NY...None. && SYNOPSIS...BTL NEAR TERM...BTL SHORT TERM...MPH LONG TERM...BJG AVIATION...BTL/DJP
Hazardous Weather Outlook National Weather Service Binghamton NY 436 PM EDT Wed Jul 7 2021 NYZ009-015>018-036-037-082045- Northern Oneida-Yates-Seneca-Southern Cayuga-Onondaga-Madison- Southern Oneida- 436 PM EDT Wed Jul 7 2021 This Hazardous Weather Outlook is for central New York. .DAY ONE...Tonight. Hazardous weather is not expected at this time. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. An eastward moving storm system will interact with moisture partly from the remnants of Elsa. Rain showers and thunderstorms will increase on Thursday and Thursday night, and a few heavier showers could lead to localized flooding, though this risk will be higher further to the east. .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. NYZ022>025-044-055-PAZ038-082045- Steuben-Schuyler-Chemung-Tompkins-Cortland-Tioga-Bradford- 436 PM EDT Wed Jul 7 2021 ...SEVERE THUNDERSTORM WATCH 344 IN EFFECT UNTIL 11 PM EDT THIS EVENING... This Hazardous Weather Outlook is for central New York and northeast Pennsylvania. .DAY ONE...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...Thursday through Tuesday. An eastward moving storm system will interact with moisture partly from the remnants of Elsa. Rain showers and thunderstorms will increase on Thursday and Thursday night, and a few heavier showers could lead to localized flooding, though this risk will be higher over areas east of I-81. .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. NYZ045-046-056-057-062-PAZ039-040-043-044-047-048-072-082045- Chenango-Otsego-Broome-Delaware-Sullivan-Susquehanna-Northern Wayne- Wyoming-Lackawanna-Luzerne-Pike-Southern Wayne- 436 PM EDT Wed Jul 7 2021 ...SEVERE THUNDERSTORM WATCH 344 IN EFFECT UNTIL 11 PM EDT THIS EVENING... This Hazardous Weather Outlook is for central New York and northeast Pennsylvania. .DAY ONE...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...Thursday through Tuesday. An eastward moving storm system will interact with moisture from the remnants of Elsa. Rain showers and thunderstorms could become heavy Thursday afternoon and Thursday night, with localized flooding possible, especially in areas which have received heavy rainfall in recent days. .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
108 PM EDT Wed Jul 7 2021
NYZ046-071800-
Otsego-
108 PM EDT Wed Jul 7 2021
...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN OTSEGO COUNTY...
At 108 PM EDT, a strong thunderstorm was located over Cooperstown,
moving east at 20 mph.
Winds in excess of 45 mph and pea size hail are possible with this
storm.
Locations impacted include...
Worcester, Middlefield, Cooperstown, Westville, Westford, Bowerstown,
Elk Creek, Oaksville, Index and Toddsville.
This storm 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 4253 7470 4252 7472 4268 7505 4280 7497
4276 7467 4266 7464 4263 7463
TIME...MOT...LOC 1708Z 289DEG 17KT 4272 7495
MPHSpecial Weather Statement
National Weather Service Binghamton NY
325 PM EDT Wed Jul 7 2021
NYZ024-055-072000-
Chemung-Tioga-
325 PM EDT Wed Jul 7 2021
...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN CHEMUNG AND CENTRAL
TIOGA COUNTIES...
At 325 PM EDT, a strong thunderstorm was located over Spencer, or 14
miles north of Waverly, moving east at 25 mph.
Winds in excess of 40 mph and pea size hail are possible with this
storm.
Locations impacted include...
Owego, Berkshire, Newark Valley, Candor, Spencer, Van Etten,
Willseyville, Apalachin, North Spencer and Catatonk.
This storm 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 4229 7662 4228 7648 4226 7647 4226 7642
4232 7641 4232 7635 4231 7635 4231 7629
4230 7629 4230 7626 4232 7624 4232 7614
4206 7617 4214 7664
TIME...MOT...LOC 1925Z 275DEG 22KT 4222 7653
BJTSpecial Weather Statement
National Weather Service Binghamton NY
354 PM EDT Wed Jul 7 2021
NYZ057-072030-
Delaware-
354 PM EDT Wed Jul 7 2021
...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN DELAWARE COUNTY...
At 353 PM EDT, a strong thunderstorm was located near Hobart, or 9
miles northeast of Delhi, moving east at 25 mph.
Winds in excess of 40 mph and half inch hail are possible with this
storm.
Locations impacted include...
Roxbury, Kortright, Stamford, Hobart and Bovina Center.
This storm 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 4233 7445 4226 7449 4224 7481 4240 7487
4247 7466 4242 7461 4235 7443
TIME...MOT...LOC 1953Z 256DEG 24KT 4235 7476
BJGThe Binghamton radar (KBGM), 62 km away, was scanning. The volume nearest the first event began at 21:07 UTC.
29 thunderstorm wind, 3 hail. Local standard time, as filed.
Strong thunderstorm winds knocked down a tree blocking a roadway.
Strong thunderstorm winds knocked down several trees in Davenport. One tree fell onto a house.
Strong thunderstorm winds knocked down trees and utility lines on Buck Rd.
A strong thunderstorm produced 1 inch size hail.
Strong thunderstorm winds knocked down a tree onto power lines which then landed on a residence with smoke filling the house.
Strong thunderstorm winds knocked down trees and utility lines onto roadway.
A strong thunderstorm produced nickel size hail.
A microburst hit Apalachin NY at 948 pm EDT Wednesday 7/7/21 |as winds up to 80 mph blasted to the northeast and ended around |Campville at 950 pm EDT. The winds were strongest from McFadden |Road to Shady Hill Road and Route 434 near the eastern end of |Main Street. The winds in these areas were between 70 and 80 mph. |The rest of the Apalachin and Campville areas had winds of 60 to |70 mph estimated. The strongest winds lasted about 2 minutes. |Numerous trees were blown down with many structures having |minor damage and a few sustaining major damage from trees |falling on them.
This area of damage was within a much broader area of thunderstorm |wind damage of 50 to 60 mph that hit many areas in Broome and Tioga |Counties in NY Wednesday evening July 7th, 2021.
Strong thunderstorm winds knocked down a tree onto Oregon Rd, blocking most of the roadway.
Strong thunderstorm winds knocked down a tree onto CR16.
Strong thunderstorm winds knocked down multiple trees along County Route 5.
Strong thunderstorm winds knocked down trees and wires.
Strong thunderstorm winds knocked down multiple trees and wires.
Strong thunderstorm winds knocked down a tree onto vehicle. Trees and utility wires were also knocked down in a separate location.
Strong thunderstorm winds knocked down a tree onto a vehicle, resulting in the vehicle catching on fire. Trees and utility lines were also knocked down in a separate area.
Strong thunderstorm winds knocked down tree blocking Echo Rd.
Strong thunderstorm winds knocked down a tree onto a car.
A strong thunderstorm produced 1 inch hail.
Strong thunderstorm winds knocked down a commercial lighted sign at the Visions Credit Union on NY-434.
Strong thunderstorm winds knocked down a tree onto Carl Rd.
Strong thunderstorm winds knocked down a large tree in a backyard.
Strong thunderstorm winds partially peeled of a roof and damaged an awning on a building on Odell Ave.
Strong thunderstorm winds knocked over 2 greenhouses.
Strong thunderstorm winds knocked down a tree blocking Patch Rd.
Strong thunderstorm winds knocked down trees and wires, blocking the roadway.
Strong thunderstorm winds knocked down a few trees, blocking roadways.
Strong thunderstorm winds knocked trees down. Rocks and debris over Fuller Hill Rd.
Strong thunderstorm winds knocked tree down onto Stanton Corners Rd.
Strong thunderstorm winds knocked tree down onto wires.
Strong thunderstorm winds knocked a tree down onto wires.
Strong thunderstorm winds knocked down tree across Stanton Corners Rd. Multiple trees around the area were also knocked down.
Strong thunderstorm winds knocked down trees and utility lines on Airport Rd.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2021Every state in 2021This day in weather historyWarnings in New York, July 2021
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: 966594, 966588, 966591, 966582, 966597, 966603, 966585, 967057, 966608, 966610, 966622, 966625, 966627, 967076, 967059, 967065, 967069, 966637, 967058, 967084, 967074, 967075, 967091, 967093, 967086, 967163, 967160, 967158, 967159, 967162, 967161, 967157.