A shortwave moved through Central New York, triggering scattered thunderstorms. Several storms produced torrential rainfall which led to flash flooding.
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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 shortwave moved through Central New York, triggering scattered thunderstorms. Several storms produced torrential rainfall which led to flash flooding. Between 2 and 4 inches of rain fell over the southern part of Broome county in approximately a 3 to 4 hour time span.
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 2, 7:01 PM EST, 33 minutes earlier.
Area Forecast Discussion National Weather Service Binghamton NY 801 PM EDT Fri Jul 2 2021 .SYNOPSIS... Upper level disturbance will bring cool weather through tomorrow with heavy showers and a few thunderstorms. Ridging builds in on Sunday with warmer and mainly dry conditions expected into Monday. && .NEAR TERM /THROUGH SATURDAY NIGHT/... 800 PM update... Showers and thunderstorms continue over our area. Only changes made with this update were PoPs for the next 6 hours, trying to capture where storms may continue. Forecast was based on some of the hi-res models. Certainly difficult to pinpoint location of showers and storms as this upper level low spins overhead. While flooding concerns continue, the severe threat should wind down as we no long have the heating. Small hail, heavy rain, gusty winds, and lightning are all hazards associated with these storms. Patchy fog was added for tomorrow morning. Winds and sky cover were briefly touched. 300 PM update... Upper level low pressure system is producing scattered heavy showers and a few thunderstorms this afternoon. Showers and storms have been slow moving with weak flow aloft, this has allowed some areas to pick up 2 to 3 inches of rain already today with minor flooding in a few spots. Water vapor imagery shows the upper low currently in western PA and this feature will move eastward and will be centered over New England by Saturday night. There have been a few breaks in the clouds this afternoon. This has created enough instability with the cold air aloft to produce a few thunderstorms that have had some small hail, with freezing levels down to only 10K feet. However, the main threat for today remains the heavy rainfall in slow moving storms. Will have to continue to watch for minor isolated flooding through this evening, especially in areas that have already seen those higher rainfall totals today. With the loss of heating this evening, we should see shower and storm activity diminish with more isolated showers into the overnight hours. Overall, the flash flood threat is low, but with the slow movement of these cells, it can't be ruled out. Tomorrow, there should be less instability with more cloud cover likely. Showers will again be more common in the afternoon just like today. High temperatures will be around 70 Saturday with low temperatures falling into the mid and upper 50s tonight. && .SHORT TERM /SUNDAY THROUGH MONDAY NIGHT/... 320 PM update... Mostly sunny skies are expected for Sunday. Chances for showers and thunderstorms remain low. While still under the influences of the upper level low, combined with daytime heating, there could be some thunderstorm activity in the afternoon and early evening hours. The best chances for thunderstorms will be in the Poconos and Catskills. Any rain shower and thunderstorm activity should conclude by sunset, which will be favorable for any holiday celebrations scheduled then. Sunday will be a pleasant day for most with shower chances limited and temperatures in the 70s. A cool night is in store as nighttime temps drop into the 50s. With weak high pressure over the area, rain chances will be limited during the day on Monday. Chances for rain showers and isolated thunderstorms are a little better Monday night with as a weak front moves into the region. The best chances for rain showers will be in parts of northern Susquehanna Region and areas northward. This is a change from our previous forecast where all of CNY had a decent chance at showers Monday night. There is some uncertainty as the GFS shows widespread showers while the ECMWF keeps most of the region fairly dry. Due to this uncertainty, mainly the National Blend of Models (NBM) was used for PoPs late night Monday which resulted in the forecast being closer to the ECMWF solution. Monday will be warmer and more humid as highs will be in the 80s and low 90s with dew points in the 60s as a ridge brings warmer air and moisture to the region. Forecasted temps were bumped up a couple of degrees above guidance due to that ridge bringing warmer air into the region. Lows on Monday will also be warm with 60s across most of the area, but 70s are possible over the northern Finger Lakes areas. && .LONG TERM /TUESDAY THROUGH FRIDAY/... 320 PM update... Not much has changed with the activity expected in the long term. This period is full of chances for rain showers and thunderstorms. The early part of the week will be warm with a cool down expected mid-week. Chances for showers and afternoon thunderstorms at better going into Tuesday as the next system passes through. Warmer temps during the day will again provide some support for convection in the afternoon and evening hours. Daytime highs will be in the 80s and low 90s with dew points in the 60s, leading to another warm, humid day. Overnight lows will be comfortable as 50s are expected. A trough begins to dig south across the Central US mid-week. With the trough over the Great Lakes, it brings another round of showers and thunderstorms to the area. A slight cooling trend is also expected around mid-week, as highs on Wednesday will be in the upper 70s to mid 80s. This trough moves east through the end of the week bringing additional rounds of showers and thunderstorms. Temperatures should remain seasonal through the end of the week. && .AVIATION /00Z SATURDAY THROUGH WEDNESDAY/... An upper level disturbance will continue to bring showers and thunderstorms and associated restrictions to the region over the next couple of hours. Brief IFR conditions will be possible in heavier showers and storms. TEMPOs were added to all terminals, except ITH and AVP, for showers or storms and associated restrictions. Confidence was too low to have a TEMPO for ITH and AVP. Ceilings and visibility are expected to drop within the next couple of hours and will remain low through Saturday morning. Patchy fog is expected at all terminals from 06z to around 14z. Ceilings begin to improve after 14z with all terminals back to at least MVFR, except AVP where Fuel Alt is expected. There is another chance for showers and thunderstorms tomorrow. Confidence was high enough to include rain showers at RME tomorrow afternoon, but not high enough to include at the rest of the terminals. Winds should be generally light during this period but will be gusty with the presence of any showers or thunderstorms over terminals. Outlook... Saturday afternoon through Saturday night... Restrictions possible in scattered showers and storms. Sunday and Monday...Mainly VFR. Tuesday and Wednesday...Mainly VFR; but showers and thunderstorms with brief restrictions will be possible. && .BGM WATCHES/WARNINGS/ADVISORIES... PA...None. NY...None. && SYNOPSIS...MPK NEAR TERM...BTL/MPK SHORT TERM...BTL/BJT LONG TERM...BTL/BJT AVIATION...BTL/MPK
Hazardous Weather Outlook National Weather Service Binghamton NY 236 PM EDT Fri Jul 2 2021 NYZ009-015>018-022>025-036-037-044>046-055>057-062-PAZ038>040-043- 044-047-048-072-031845- Northern Oneida-Yates-Seneca-Southern Cayuga-Onondaga-Steuben- Schuyler-Chemung-Tompkins-Madison-Southern Oneida-Cortland-Chenango- Otsego-Tioga-Broome-Delaware-Sullivan-Bradford-Susquehanna- Northern Wayne-Wyoming-Lackawanna-Luzerne-Pike-Southern Wayne- 236 PM EDT Fri Jul 2 2021 This Hazardous Weather Outlook is for central New York and northeast Pennsylvania. .DAY ONE...This afternoon and tonight. Scattered showers and isolated thunderstorms this afternoon and evening will produce pockets of heavy rainfall and localized flooding could occur. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
Special Weather Statement
National Weather Service Binghamton NY
714 PM EDT Fri Jul 2 2021
NYZ062-PAZ040-022345-
Sullivan-Northern Wayne-
714 PM EDT Fri Jul 2 2021
...A STRONG THUNDERSTORM WILL AFFECT WEST CENTRAL SULLIVAN AND EAST
CENTRAL WAYNE COUNTIES...
At 714 PM EDT, a strong thunderstorm was located over Cochecton, or
12 miles northeast of Honesdale, moving northeast at 15 mph.
Winds in excess of 40 mph and dime size hail are possible with this
storm.
Locations impacted include...
Bethel, Damascus, Callicoon, Tusten, Cochecton, Jeffersonville, Lava,
Fosterdale, Narrowsburg and Hortonville.
Heavy rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
LAT...LON 4156 7502 4157 7505 4160 7507 4161 7513
4165 7518 4185 7501 4172 7476
TIME...MOT...LOC 2314Z 225DEG 14KT 4168 7504
AJGSpecial Weather Statement
National Weather Service Binghamton NY
740 PM EDT Fri Jul 2 2021
NYZ056-PAZ039-030015-
Broome-Susquehanna-
740 PM EDT Fri Jul 2 2021
...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT SOUTHERN BROOME AND
NORTH CENTRAL SUSQUEHANNA COUNTIES...
At 740 PM EDT, strong thunderstorms were clustered over Conklin, or
near Binghamton, moving northeast at 20 mph.
Winds in excess of 30 mph and half inch hail are possible with this
storm.
Locations impacted include...
Binghamton, Johnson City, Kirkwood, Conklin, Port Dickinson,
Hallstead, Windsor, Great Bend, Chenango Forks and Chenango Bridge.
Heavy rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
LAT...LON 4213 7549 4193 7578 4200 7603 4229 7590
4227 7585 4225 7584 4225 7580
TIME...MOT...LOC 2340Z 222DEG 19KT 4205 7586
AJGSpecial Weather Statement
National Weather Service Binghamton NY
753 PM EDT Fri Jul 2 2021
NYZ062-030045-
Sullivan-
753 PM EDT Fri Jul 2 2021
...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN SULLIVAN COUNTY...
At 752 PM EDT, a strong thunderstorm was located near Lava, or 14
miles west of Monticello, moving northeast at 15 mph.
Winds in excess of 30 mph and half inch hail are possible with this
storm.
Locations impacted include...
Monticello, Bethel, Tusten, Jeffersonville, Lava, Eldred, Mongaup
Valley, Maplewood, Smallwood and White Lake.
Heavy rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
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 4148 7493 4148 7496 4151 7501 4152 7500
4154 7502 4155 7502 4159 7505 4181 7490
4163 7464
TIME...MOT...LOC 2352Z 223DEG 12KT 4159 7495
AJGPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
804 PM EDT FRI JUL 2 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0753 PM FLASH FLOOD 2 ESE ORWELL 41.87N 76.24W
07/02/2021 BRADFORD PA 911 CALL CENTER
WATER OVER BRIDGE ACROSS ROUTE 457. BRIDGE
MAY BE WASHED OUT.
&&
JABPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
811 PM EDT FRI JUL 2 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0722 PM FLASH FLOOD 3 SW WINDHAM 41.93N 76.32W
07/02/2021 BRADFORD PA 911 CALL CENTER
BRIDGE POSSIBLY WASHED OUT ON MERRY GO ROUND
ROAD.
&&
JABPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
825 PM EDT FRI JUL 2 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0820 PM FLASH FLOOD 4 ESE MILAN 41.90N 76.43W
07/02/2021 BRADFORD PA 911 CALL CENTER
SPAULDING HILL ROAD WAS REPORTED AS
IMPASSABLE DUE TO FLOOD DEBRIS.
&&
JABThe Binghamton radar (KBGM), 17 km away, was scanning. The volume nearest the first event began at 00:34 UTC.
2 flash flood, 1 heavy rain. Local standard time, as filed.
Roberts and Pierce Creek Roads were flooded and covered with debris. Roads were impassable.
Multiple creeks were over their banks in the Town of Binghamton. Several roads were flooded, washed out and impassible.
A maximum 5 inch rain gauge had overtopped. Additional rain had fallen past that point in time.
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: 974691, 974692, 974693.