A couple of rounds of thunderstorms occurred during the afternoon and evening of the 30th across western New England. Scattered reports of wind damage occurred with the strongest storms.
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 ALY wrote it up.
A couple of rounds of thunderstorms occurred during the afternoon and evening of the 30th across western New England. Scattered reports of wind damage occurred with the strongest storms.
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 Albany, NY wrote its last area forecast discussion before the first event at Jun 30, 5:51 PM EST, 18 minutes earlier.
AREA FORECAST DISCUSSION National Weather Service Albany NY 651 PM EDT Wed Jun 30 2021 .SYNOPSIS... A cooler but unsettled weather pattern is in the forecast for the remainder of this week. The holiday weekend appears to offer more clouds and the threat for showers with some improvements expected Sunday evening. && .NEAR TERM /UNTIL 6 AM THURSDAY MORNING/... UPDATE...Lines and clusters of convection continue to the south of Interstate 90 where steep low level lapse rates and high instability remain in place. Some training echoes are also occurring which is resulting in heavy rainfall with PWATs near 2 inches per SPC Mesoscale Analysis window. So the severe thunderstorm watch #329 remains in effect and heat advisory continues for mid-Hudson Valley and northwest Connecticut. Timing of the upstream trough and frontal axis remains on track as isolated to scattered convection remains in the forecast with these boundaries until the nocturnal processes take hold. So main update was to update the headlines, hourly grids of temps/dewpts and winds. Prev Disc... Clusters/Lines of convection continue to develop and progress across the region. Per mesoscale 1-min GOES visible imagery, there appears to be a more distinct line just south of Lake Ontario as this will likely mark both the diminishing trend in the wake of the boundary along with the diurnal cycle for southern areas through the evening hours. Instability parameters are rather impressive with the only minor exception being the mid level lapse rates. So for the balance of the afternoon hours, we will keep PoPs rather high with the scattered to numerous convection as most of the activity should diminish toward 02Z/Thu. A gradual decrease in surface dewpoints are expected from northwest to southeast, however, trends in the near term NCEP Model Suite suggest this aforementioned boundary will become quasi-stationary across the southern zones as approaching upstream trough, currently approaching the Upper Peninsula of Michigan, aids in the near parallel flow from the surface to aloft. Short waves embedded within the southwest flow aloft are expected to develop or redevelop more showers toward sunrise for these southern areas (mainly south of I90). Overnight lows mainly into the 60s. && .SHORT TERM /6 AM THURSDAY MORNING THROUGH FRIDAY NIGHT/... Challenging short-term forecast period as this quasi-stationary frontal zone, approaching/digging trough along with increasing diffluence across the northeast corridor all point toward periods of showers/rain across eastern NY and western NE. Placement of where the steadier rainfall would occur appears, at this time, from the Catskills, mid-Hudson Valley, near the Capital District and points east and southeast. Furthermore, Showalter Index values are progged to remain near or just below 0C so the threat for deeper convective elements does exist. So we will keep PoPs rather high for these areas with CHC-SCT PoPs elsewhere. Later Friday into Friday night, this appears to be a transition period of weather as the moisture transport is expected to slide eastward as we are left with a cut-off upper low dynamics across the region. The placement of this upper low varies in all available guidance with ensemble means placing it nearby the CWA. So the threat for additional showers remains in the forecast with Showalter values hovering near 0C. We will limit the mention of thunder at this time. && .LONG TERM /SATURDAY THROUGH WEDNESDAY/... Cool and unsettled conditions expected for much of the upcoming 4th of July holiday weekend. An anomalous (500 mb height anomalies around -1 to -2 STDEV) upper level trough will be positioned over the region through Sunday. There are model differences as to where the closed circulation will be positioned on Saturday, which will have an impact on how widespread showers could be. The NAM/GFS showing the main core of the upper low positioned to our south/west, while the ECMWF is farther north/east and weaker. The NAM/GFS solution could result in a period of steadier rain on Saturday across mainly the southern half of the area, but this is not certain. Expecting at least scattered showers taking a blended approach, but will have to watch for any areas of greater potential for steadier/more widespread rain. There could be some instability developing during the afternoon depending on how much surface heating can occur. Skies should generally be mostly cloudy though, but will mention a chance of thunderstorms under the influence of the upper low. Temperatures will be at least 10 degrees below normal for early July. Additional (mainly scattered) showers are possible on Sunday with the upper level trough still in place, with another disturbance or two expected to rotate around the main circulation in the N-NW flow regime. The main more of the upper low looks to be positioned across far eastern New England to start the day and moving off the coast, so will lower probabilities for thunder and only mention slight chance from Albany south/east. Temperatures should be a bit warmer than Saturday, but still cooler than normal. Some late day sunshine is possible. The upper trough moves out by Monday, with rising upper level heights and a warmer air mass moving in. An isolated shower or storm may occur as the warmer and more humid air mass moves in. Overall lack of forcing and upper level support should result in sparse, if any, convective coverage. Temperatures should warm back to normal levels Monday afternoon with dewpoints rising back into the 60s. Forecast confidence decreases for the Tuesday through Wednesday time frame, mainly due to timing differences of a surface cold front and upper level trough moving in from the SE Canada and the upper Great Lakes. GFS indicating faster timing and thus a better chance of showers and thunderstorms on Tuesday, while the ECMWF delays the cold front passage until Wednesday. NBM guidance favors slower timing, so will mention higher probs for convection on Wednesday for now, with continued warm/humid conditions. && .AVIATION /00Z THURSDAY THROUGH MONDAY/... Through 18z Thursday...Conditions are currently VFR across the region, but a cold front will bring thunderstorms, some strong to severe, to the region this afternoon. A line of thunderstorms should slowly move through the region from northwest to southeast this afternoon. Thunderstorms will be possible at GFL by 19z, ALB at 21Z, and 22z at POU and PSF. Thunderstorms end from northwest to southeast this evening between 23z and 02z. Some lingering showers will be possible behind the main line of thunderstorms for a few hours tonight. After showers end, some scattered low clouds will be possible, but there is some uncertainty as to widespread coverage of any clouds will be. Currently have SCT in the TAFs, cannot rule out some BKN MVFR ceilings after midnight, although confidence is not high enough to include at this time. Best chance for low clouds looks to be at PSF. Any TAF sites that see rain this afternoon will have a better chance for some low cloud development tonight. Tomorrow, there will be a chance for some showers during the day, but coverage of showers remains uncertain at this time. Winds will be from the S/SW at 5 to 15 kts during the daytime hours today. Thunderstorms could have gustier winds. Tonight, winds become light and variable. Tomorrow, winds will be mainly from the NW at around 5 kt, although winds at GFL could be around 5 kt from the NE. Outlook... Thursday Night: High Operational Impact. Likely SHRA...TSRA. Friday: High Operational Impact. Likely SHRA...TSRA. Friday Night: Moderate Operational Impact. Chance of SHRA...TSRA. Saturday: Moderate Operational Impact. Chance of SHRA...TSRA. Saturday Night: Moderate Operational Impact. Chance of SHRA. Independence Day: Moderate Operational Impact. Chance of SHRA...TSRA. Sunday Night: Low Operational Impact. Slight Chance of SHRA. Monday: Moderate Operational Impact. Chance of SHRA...TSRA. && .FIRE WEATHER... A cooler but unsettled weather pattern is in the forecast for the remainder of this week. The holiday weekend appears to offer more clouds and the threat for showers with some improvements expected Sunday evening. Showers and thunderstorms with periods of moderate to heavy rainfall are expected into this evening. Rather high relative humidity values tonight with 85 to 95 percent expected. These values drop only modestly Thursday afternoon with 60 to 80 percent expected with those higher values south of Interstate 90. && .HYDROLOGY... Wet weather expected into the upcoming holiday weekend. Showers and thunderstorms will contain a period of moderate to heavy rainfall with isolated 2 inches possible. Some minor impacts from flooding is possible as the region remains in a marginal risk of excessive rainfall. The weather will remain unsettled for the remainder of the week and into the holiday weekend as the cold front will be slow to move away. Precipitable water values will remain high into Friday especially for areas to the south and east of the Capital District so the heavy downpour threat will continue. Excessive rainfall outlook continues with a marginal risk mainly south of the Adirondacks. Precipitable water values are expected to drop for the weekend. For details on specific area rivers and lakes, including observed and forecast river stages and lake elevations, please visit the Advanced Hydrologic Prediction Service /AHPS/ graphs on our website. && .CLIMATE... Record High Temperatures for June 30th: Albany, NY: 98F set in 1964 Glens Falls, NY: 97F set in 1964 Poughkeepsie, NY: 99F set in 1964 && .ALY WATCHES/WARNINGS/ADVISORIES... CT...Heat Advisory until 8 PM EDT this evening for CTZ001-013. NY...Heat Advisory until 8 PM EDT this evening for NYZ064>066. MA...None. VT...None. && SYNOPSIS...BGM NEAR TERM...BGM SHORT TERM...BGM LONG TERM...JPV AVIATION...Wasula FIRE WEATHER...IAA/BGM HYDROLOGY...IAA/BGM CLIMATE...IAA
Hazardous Weather Outlook National Weather Service Albany NY 605 PM EDT Wed Jun 30 2021 NYZ032-033-038>043-047>054-082>084-VTZ013>015-011100- Northern Herkimer-Hamilton-Southern Herkimer-Southern Fulton- Montgomery-Northern Saratoga-Northern Warren-Northern Washington- Schoharie-Western Schenectady-Eastern Schenectady-Southern Saratoga- Western Albany-Eastern Albany-Western Rensselaer-Eastern Rensselaer- Northern Fulton-Southeast Warren-Southern Washington-Bennington- Western Windham-Eastern Windham- 605 PM EDT Wed Jun 30 2021 This Hazardous Weather Outlook is for the Adirondacks, Mohawk Valley, Schoharie Valley, Capital Region, Lake George Saratoga Region, northern Taconics into southern Vermont. .DAY ONE...Tonight. Isolated to scattered thunderstorms are possible through the evening hours. Severe weather potential is low with the main hazards from cloud to ground lightning and brief heavy rainfall. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. There is a chance of thunderstorms each afternoon into the evening. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. MAZ001-025-NYZ058>061-063-011100- Northern Berkshire-Southern Berkshire-Western Greene-Eastern Greene- Western Columbia-Eastern Columbia-Western Ulster- 605 PM EDT Wed Jun 30 2021 ...SEVERE THUNDERSTORM WATCH 329 IN EFFECT UNTIL 10 PM EDT THIS EVENING... This Hazardous Weather Outlook is for the Berkshires, eastern Catskills, into the central Taconics. .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. There is a chance of thunderstorms each afternoon into the evening. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions to the National Weather Service in Albany New York while following CDC, local and state safety guidelines. CTZ001-013-NYZ064>066-011100- Northern Litchfield-Southern Litchfield-Eastern Ulster- Western Dutchess-Eastern Dutchess- 605 PM EDT Wed Jun 30 2021 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...SEVERE THUNDERSTORM WATCH 329 IN EFFECT UNTIL 10 PM EDT THIS EVENING... This Hazardous Weather Outlook is for northwestern Connecticut and the mid Hudson Valley of east central New York. .DAY ONE...Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. There is a chance of thunderstorms each afternoon into the evening. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions to the National Weather Service in Albany New York while following CDC, local and state safety guidelines.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ALBANY NY
514 PM EDT WED JUN 30 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0405 PM TSTM WND DMG 3 NW BECKET 42.36N 73.11W
06/30/2021 BERKSHIRE MA 911 CALL CENTER
TREES ON WIRES AND NEARBY RESIDENCE. TIME ESTIMATED BY
RADAR.
&&
EVENT NUMBER ALY2103415
BGMPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ALBANY NY
530 PM EDT WED JUN 30 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0401 PM TSTM WND DMG TOWNSHEND 43.04N 72.66W
06/30/2021 WINDHAM VT PUBLIC
TREES DOWN ON WIRES ALONG ROUTE 30. TIME ESTIMATED BY
RADAR.
&&
EVENT NUMBER ALY2103416
JPVSpecial Weather Statement
National Weather Service Albany NY
531 PM EDT Wed Jun 30 2021
MAZ025-NYZ060-061-302215-
Southern Berkshire-Eastern Columbia-Western Columbia-
531 PM EDT Wed Jun 30 2021
...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN BERKSHIRE AND EAST
CENTRAL COLUMBIA COUNTIES...
At 531 PM EDT, a strong thunderstorm was located near Philmont, or
near Chatham, moving east at 30 mph.
Winds in excess of 40 mph and pea size hail are possible with this
storm.
Locations impacted include...
Great Barrington, Lee, Lenox, Austerlitz, Philmont, Housatonic,
Ghent, Stockbridge, West Stockbridge, Monterey, Alford, Tyringham,
Mahkeenac Heights, Mellenville, Glendale, Tanglewood, North
Hillsdale, Williamsville, Arnolds Mill and Lenox Dale.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
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 4224 7370 4234 7370 4237 7324 4232 7320
4215 7318
TIME...MOT...LOC 2131Z 271DEG 26KT 4229 7362
KSLSpecial Weather Statement National Weather Service Albany NY 543 PM EDT Wed Jun 30 2021 NYZ063-064-302230- Western Ulster-Eastern Ulster- 543 PM EDT Wed Jun 30 2021 ...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL ULSTER COUNTY... At 543 PM EDT, a strong thunderstorm was located near Napanoch, or 10 miles north of Ellenville, moving east at 30 mph. Winds in excess of 40 mph and pea size hail are possible with this storm. Locations impacted include... Kingston, New Paltz, Hurley, High Falls, Kerhonkson, Tillson, Olivebridge, Port Ewen, Lloyd, Rosendale, Marbletown, Cherrytown, Rolling Meadows, Maple Hill, Palentown, Atwood, Pacama, Liebhardt, Fantinekill and Hillside. This includes Interstate 87 between exits 18 and 19. Torrential rainfall is also occurring with this storm, and may cause localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. 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 4178 7447 4192 7445 4197 7397 4170 7398 TIME...MOT...LOC 2143Z 271DEG 26KT 4185 7440 KSL
Special Weather Statement National Weather Service Albany NY 545 PM EDT Wed Jun 30 2021 MAZ025-NYZ060-061-302215- Southern Berkshire-Eastern Columbia-Western Columbia- 545 PM EDT Wed Jun 30 2021 ...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT SOUTHWESTERN BERKSHIRE AND CENTRAL COLUMBIA COUNTIES... At 544 PM EDT, strong thunderstorms were clustered near Philmont, or 7 miles southeast of Hudson, moving east at 45 mph. Winds in excess of 40 mph and penny size hail are possible with this storm. Locations impacted include... Great Barrington, Hudson, Claverack, Livingston, Copake, Sheffield, Philmont, Claverack-Red Mills, Housatonic, Stockbridge, Hillsdale, New Marlborough, Taghkanic, Alford, Hartsville, Greenport Center, Mellenville, Churchtown, Craryville and Newsboy Statue. 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 4208 7376 4225 7380 4230 7327 4212 7321 TIME...MOT...LOC 2144Z 258DEG 37KT 4219 7366 Rathbun
Special Weather Statement
National Weather Service Albany NY
638 PM EDT Wed Jun 30 2021
CTZ001-302315-
Northern Litchfield-
638 PM EDT Wed Jun 30 2021
...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN LITCHFIELD
COUNTY...
At 638 PM EDT, a strong thunderstorm was located over Winsted, or 7
miles northeast of Torrington, moving east at 35 mph.
Wind gusts up to 50 mph and half inch hail are possible with this
storm.
Locations impacted include...
Winsted, Barkhamsted, Colebrook, Robertsville, Barkhampsted Center,
Pleasant Valley, Mooreville, Riverton, Nelsons Corner, Goose Green,
Mill Brook and Beech Rock.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
LAT...LON 4190 7291 4188 7311 4197 7314 4203 7301
4197 7303 4197 7289
TIME...MOT...LOC 2238Z 257DEG 35KT 4193 7305
KSLThe Brookhaven radar (KOKX), 106 km away, was scanning. The volume nearest the first event began at 23:08 UTC.
7 thunderstorm wind. Local standard time, as filed.
Trees and wires were downed on Kent Road and Cornwall Road. A transformer exploded.
Local law enforcement received multiple reports of trees and wires down.
Trees and wires were downed on Kent Rd.
Local law enforcement received several reports of trees down.
Large tree limbs and branches were downed.
Local law enforcement received a few reports of downed trees on wires.
Trees and wires down at Minor Road and Hill Road resulting in road closures.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Connecticut in 2021Every state in 2021This day in weather historyWarnings in Connecticut, June 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: 966348, 966351, 966354, 966353, 966355, 966357, 966358.