A severe thunderstorm moved across western Massachusetts during the evening hours of Monday, June 21, 2021. A tree was downed as a result of the storm.
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 severe thunderstorm moved across western Massachusetts during the evening hours of Monday, June 21, 2021. A tree was downed as a result of the storm.
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 21, 8:22 PM EST, 1 hour 18 minutes earlier.
AREA FORECAST DISCUSSION National Weather Service Albany NY 922 PM EDT Mon Jun 21 2021 .SYNOPSIS... Showers and thunderstorms will occur along and ahead of a cold front. This cold front will pass to the east of the region tonight as a much cooler air mass will be ushered in its wake. Chances for showers will lingering Tuesday as a disturbance in the upper levels of the atmosphere moves overhead. A return toward warmer weather arrives later this week. && .NEAR TERM /THROUGH TUESDAY/... Severe thunderstorm watch is now in effect 11 PM EDT for all of eastern NY except Herkimer and Hamilton Counties, and all of western New England. Update...as of 922 pm EDT...The first full day summer was steamy and full of mother natures fireworks with strong to severe thunderstorms impacting locations north and west of the Capital Region. However, plenty of instability remains in place from ALY south and east per the special 21 UTC and the 00 UTC soundings. The MLCAPE is still around 1700 J/kg with a supercell composite parameter of 11.4. The PWAT increased to 1.84" with a 0-6 km bulk shear value of 30 kts. The unidirectional SW flow above H850 to H300 indicates a linear of squall line development continues...and the latest KENX radar indicates one. Several severe thunderstorm warnings remain out and the watch was coordinated with SPC and neighboring WFOs to continue it until 03Z for the Lake George Region, northern Capital Region, central and eastern Mohawk Valley and southern VT. The watch continues further south and east. A diminishing trend is expected between 03Z and 05Z. Lightning will continue to be frequent with bursts of heavy rain. Previous near term until Tuesday... Pre-frontal trough axis will clear the region this evening with the cold frontal passage slow by about 6-9 hours and should be east of the southeast CWA by 12Z Tuesday. Clouds are expected to linger through the night as winds become west- northwest in the wake of the frontal passage. Overnight lows should range from the lower half of the 60s for the Hudson Valley and Litchfield County locations and 50s for the higher terrain. Through Tuesday, seems enough baroclinicity and the frontal boundary slowing down its forward propagation due to near parallel flow aloft and the approach of a pv-anomaly from the lower Ohio Valley that a period of showers or light rain may redevelop. Per the latest NCEP Model Suite and international guidance, seems the southeast 1/2 or 2/3rds will be under the influence for additional wet weather through the daylight hours. The ECMWF remains the wetter of the numerical guidance as it is stronger with the pv-anomaly with the NAM not too far behind. The GFS remains the most progressive with the ICON somewhat in the middle of the guidance and close to the GGEM. So we will increase PoPs back to likely and under cloud coverage, the temperatures will be quite a bit cooler than those observed this Monday afternoon. && .SHORT TERM /TUESDAY NIGHT THROUGH WEDNESDAY NIGHT/... A fairly tranquil, cooler and less humid air mass as surface ridge crests across the region through the middle of the week. However, H500 trough axis is expected to remain in place so likely diurnally driven cumulus field can be expected but should remain dry. As H850 temperatures hover into the middle single digits, afternoon highs Wednesday will generally be into the 60s and lower half of the 70s for valley locations and overnight lows generally into the 40s for the region (some upper 30s for the Dacks Tuesday night). && .LONG TERM /THURSDAY THROUGH MONDAY/... The aforementioned surface ridge axis is forecast, per global model consensus, to slide off the northeast shoreline during Thursday. The return southerly flow around the periphery of the high will allow for warm advection to commence from the Ohio Valley and into the northeast corridor. This should allow for gradual boundary layer warmth with highs Thursday returning close to 80F for valley locations and 70s elsewhere. Humidity will slowly increase for the remainder of the extended period as the combination of Gulf of Mexico moisture and Atlantic moisture begin to converge across the middle Atlantic and northeast corridors. Potential for some marine influence clouds to advect in later Friday into Friday night and, per the ECWMF/GGEM, a shower or two will be possible. Then heading into the weekend, rather low confidence forecast as too how far east an upstream frontal boundary approaches for increasing threat for showers and thunderstorms. The ECMWF remains the strongest with the upper high over the western Atlantic which keeps this boundary well upstream. The GFS/GGEM is weaker with this upper high with the ICON somewhat in the middle of the guidance. So, per coordination with WPC, we will lean toward a slightly wetter side of the guidance envelope at this time. Chance to scattered through the first half of the weekend then into lower likely PoPs for the second half of the weekend. Temperatures will equally be as challenging as ensemble mean suggests lower 80s for valley locations with generally 70s expected and overnight lows generally into the 60s. && .AVIATION /01Z TUESDAY THROUGH SATURDAY/... A cold front will move towards and across the region tonight into tomorrow morning. A weak disturbance along the front will keep the rain going into the late morning into the early afternoon before gradual clearing from the west. VFR conditions will occur ahead of showers and thunderstorms, but conditions will deteriorate to MVFR and possibly brief IFR conditions with the showers and storms moving through 00Z- 04Z/TUE. Some brief gusty winds to 30-35 kts are also possible. Isolated stronger gusts are possible. The winds will shift to the west to southwest in the wake of the front at 5-10 kts. Some lower clouds will persists in the wake of the initial front. Cigs may hover at 3-4 kft AGL in the wake of the front with some mid level clouds 8-12 kft AGL. Expect the rain to build back in with a weak disturbance along the front between 11Z-15Z/TUE. PROB30 groups were used to bring the rain in across the TAF sites, and it should diminish quickly in the late morning into the afternoon from northwest/west to the east/southeast. MVFR cigs/vsbys may occur and linger the longest at KPOU/KPSF until 16Z-18Z/TUE. Expect low VFR conditions thereafter with cigs in the 3.5-6 kft AGL range but drier weather settling back in. The winds be from the west to northwest at 5-10 kts in the late morning into the early afternoon, and then be northwest to north at around 10 kts for the mid to late pm. Outlook... Tuesday into Tuesday Night: Low Operational Impact. Chance of SHRA. Wednesday through Friday: No Operational Impact. NO SIG WX. && .FIRE WEATHER... Strong southerly winds will persist into early this evening ahead of showers and thunderstorms that will occur along and ahead of a cold front, some containing heavy rainfall. This cold front will pass to the east of the region tonight as a much cooler air mass will be ushered in its wake. Chances for showers will lingering Tuesday as a disturbance in the upper levels of the atmosphere moves overhead, especially to the southeast of the Adirondacks. This will keep relative humidity levels elevated through Tuesday. A return toward warmer and drier weather arrives later this week. && .HYDROLOGY... Thunderstorms, some containing heavy rainfall, will result in isolated flood/flash flood threat through this evening. Otherwise ponding of water on roadways and standing water in low lying areas is expected with urban flooding of poor drainage areas possible. Additional light rainfall is expected on Tuesday with mainly areas to the southeast of the Adirondacks. Fair weather is then expected to to close out the work week with the weather turning unsettled for the upcoming 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. && .ALY WATCHES/WARNINGS/ADVISORIES... CT...None. NY...None. MA...None. VT...None. && SYNOPSIS...BGM/Wasula NEAR TERM...BGM/Wasula SHORT TERM...BGM LONG TERM...BGM AVIATION...Wasula FIRE WEATHER...BGM HYDROLOGY...BGM/Wasula
Hazardous Weather Outlook National Weather Service Albany NY 858 PM EDT Mon Jun 21 2021 CTZ001-013-MAZ001-025-NYZ039>043-047>054-058>061-063>066-082>084- VTZ013>015-221100- Northern Litchfield-Southern Litchfield-Northern Berkshire- Southern Berkshire-Southern Fulton-Montgomery-Northern Saratoga- Northern Warren-Northern Washington-Schoharie-Western Schenectady- Eastern Schenectady-Southern Saratoga-Western Albany-Eastern Albany- Western Rensselaer-Eastern Rensselaer-Western Greene-Eastern Greene- Western Columbia-Eastern Columbia-Western Ulster-Eastern Ulster- Western Dutchess-Eastern Dutchess-Northern Fulton-Southeast Warren- Southern Washington-Bennington-Western Windham-Eastern Windham- 858 PM EDT Mon Jun 21 2021 ...SEVERE THUNDERSTORM WATCH 303 IN EFFECT UNTIL 11 PM EDT THIS EVENING... This Hazardous Weather Outlook is for northwestern Connecticut, western Massachusetts, eastern New York excluding Herkimer and Hamilton Counties and southern Vermont. .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...Tuesday through Sunday. Chance of thunderstorms Saturday and Sunday mainly during the afternoon into the evening. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions to the National Weather Service in Albany while following all local, state and CDC guidelines. NYZ032-033-038-221100- Northern Herkimer-Hamilton-Southern Herkimer- 858 PM EDT Mon Jun 21 2021 This Hazardous Weather Outlook is for Herkimer and Hamilton Counties in eastern New York. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Chance thunderstorms Saturday and Sunday mainly during the afternoon into the evening. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to Standard Operating Procedures.
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE ALBANY NY
950 PM EDT MON JUN 21 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0325 PM TSTM WND DMG 2 ENE PISECO 43.44N 74.51W
06/21/2021 HAMILTON NY EMERGENCY MNGR
TREES DOWN NEAR ARIETTA TOWN COURT ALONG OLD PISECO
ROAD.
0335 PM TSTM WND DMG 6 S SPECULATOR 43.49N 74.39W
06/21/2021 HAMILTON NY EMERGENCY MNGR
TREES DOWN AT MOFFITT BEACH NEAR ROUTE 8.
0338 PM TSTM WND DMG 2 SW PISECO 43.41N 74.56W
06/21/2021 HAMILTON NY EMERGENCY MNGR
NUMEROUS POWER POLES AND TREES DOWN ALONG COUNTY ROUTE
24 ON THE BACKSIDE OF PISECO LAKE.
0345 PM TSTM WND DMG 2 SSW PISECO 43.40N 74.54W
06/21/2021 HAMILTON NY DEPT OF HIGHWAYS
TREES AND WIRES DOWN ON SOUTH SHORE ROAD.
0407 PM TSTM WND DMG 4 SW EAGLE BAY 43.72N 74.88W
06/21/2021 HERKIMER NY LAW ENFORCEMENT
TREE DOWN ON SOUTH SHORE RD
0440 PM TSTM WND DMG HAGUE 43.75N 73.50W
06/21/2021 WARREN NY 911 CALL CENTER
TREES AND WIRES DOWN NEAR ROUTE 8 AND 9N.
0453 PM TSTM WND DMG 3 NE LAKE GEORGE VILLAG 43.46N 73.67W
06/21/2021 WARREN NY 911 CALL CENTER
TREES AND WIRES DOWN IN BOLTON LANDING.
0456 PM TSTM WND DMG 2 N BOLTON LANDING 43.59N 73.65W
06/21/2021 WARREN NY LAW ENFORCEMENT
TREE AND WIRES DOWN NEAR ROUTE 9N.
0525 PM TSTM WND DMG 3 ENE GLENS FALLS AIRPO 43.35N 73.54W
06/21/2021 WASHINGTON NY 911 CALL CENTER
TREES AND WIRES DOWN IN KINGSBURY.
0525 PM TSTM WND DMG 8 N GRANVILLE 43.52N 73.25W
06/21/2021 WASHINGTON NY 911 CALL CENTER
TREES AND WIRES DOWN IN HAMPTON NEAR ROUTE 22A.
0540 PM TSTM WND DMG 2 NW GRANVILLE 43.43N 73.28W
06/21/2021 WASHINGTON NY 911 CALL CENTER
TREES AND WIRES DOWN IN MIDDLE GRANVILLE.
0631 PM TSTM WND DMG OLD FORGE 43.71N 74.97W
06/21/2021 HERKIMER NY LAW ENFORCEMENT
REPORT OF TREES DOWN
0635 PM TSTM WND DMG OLD FORGE 43.71N 74.97W
06/21/2021 HERKIMER NY DEPT OF HIGHWAYS
ALL LANES ON ROUTE 28 IN OLD FORGE ARE BLOCKED BETWEEN
CROSBY BLVD AND ADAMS ST DUE TO WIRES DOWN
0704 PM TSTM WND DMG SALISBURY 43.13N 74.84W
06/21/2021 HERKIMER NY LAW ENFORCEMENT
MULTIPLE TREES DOWN
0707 PM TSTM WND DMG LITTLE FALLS 43.05N 74.86W
06/21/2021 HERKIMER NY LAW ENFORCEMENT
TREES DOWN
0728 PM TSTM WND DMG 7 ENE PISECO 43.47N 74.41W
06/21/2021 HAMILTON NY 911 CALL CENTER
TREES DOWN NEAR ROUTE 8 IN LAKE PLEASANT TOWN CENTER.
0840 PM TSTM WND DMG 2 WSW SUMMIT 42.57N 74.62W
06/21/2021 SCHOHARIE NY 911 CALL CENTER
WIRES DOWN.
0844 PM TSTM WND DMG GALWAY 43.02N 74.03W
06/21/2021 SARATOGA NY EMERGENCY MNGR
TREE DOWN ON WIRES ALONG SOUTHLINE RD. ALSO LIGHTNING
HIT A STRUCTURE, CAUSING A FIRE, ON LAKE RD.
0846 PM TSTM WND DMG CORINTH 43.25N 73.83W
06/21/2021 SARATOGA NY EMERGENCY MNGR
WIRES DOWN ALONG ANTONE MOUNTAIN RD AND HARRIS RD IN
THE TOWN OF CORINTH.
0850 PM TSTM WND DMG MIDDLEBURGH 42.60N 74.33W
06/21/2021 SCHOHARIE NY LAW ENFORCEMENT
TREES AND WIRES DOWN
0852 PM TSTM WND DMG 3 N PORTER CORNERS 43.20N 73.89W
06/21/2021 SARATOGA NY EMERGENCY MNGR
TREE DOWN ON WIRES
&&
EVENT NUMBER ALY2103323 ALY2103322 ALY2103321 ALY2103324 ALY2103327
ALY2103325 ALY2103326 ALY2103328 ALY2103330 ALY2103331 ALY2103329
ALY2103332 ALY2103335 ALY2103333 ALY2103334 ALY2103336 ALY2103337
ALY2103338 ALY2103339 ALY2103341 ALY2103340
WasulaSpecial Weather Statement
National Weather Service Albany NY
951 PM EDT Mon Jun 21 2021
VTZ013-220215-
Bennington-
951 PM EDT Mon Jun 21 2021
...A STRONG THUNDERSTORM WILL AFFECT NORTHERN BENNINGTON COUNTY...
At 951 PM EDT, a strong thunderstorm was located over Dorset, or 8
miles northwest of Manchester, moving northeast at 35 mph.
Winds in excess of 40 mph are possible with this storm.
Locations impacted include...
Manchester, Dorset, Manchester Center, Rupert, Sandgate, North
Rupert, Beartown, East Rupert, North Dorset, Barnumville, West
Sandgate, Freedleyville, West Rupert, South Dorset, East Dorset and
North Landgrove.
LAT...LON 4326 7285 4325 7285 4310 7326 4332 7325
4330 7299 4329 7299 4329 7298 4330 7297
4330 7282 4326 7282
TIME...MOT...LOC 0151Z 239DEG 31KT 4328 7314
DBTPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ALBANY NY
1006 PM EDT MON JUN 21 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0817 PM TSTM WND DMG LAKE LUZERNE-HADLEY 43.32N 73.84W
06/21/2021 WARREN NY 911 CALL CENTER
TREE ON WIRES.
0826 PM TSTM WND DMG 2 ENE LAKE GEORGE VILLA 43.44N 73.68W
06/21/2021 WARREN NY 911 CALL CENTER
TREE DOWN.
0826 PM TSTM WND DMG 2 WSW BOLTON LANDING 43.54N 73.69W
06/21/2021 WARREN NY 911 CALL CENTER
TREE ON WIRES.
&&
EVENT NUMBER ALY2103342
EVENT NUMBER ALY2103343
EVENT NUMBER ALY2103344
JLVSpecial Weather Statement
National Weather Service Albany NY
1016 PM EDT Mon Jun 21 2021
NYZ084-VTZ013>015-220315-
Southern Washington-Eastern Windham-Western Windham-Bennington-
1016 PM EDT Mon Jun 21 2021
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHEASTERN
WASHINGTON...BENNINGTON AND NORTHERN WINDHAM COUNTIES...
At 1016 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Salem to near Arlington to near
Berlin. Movement was northeast at 45 mph.
Winds in excess of 40 mph are possible with these storms.
Locations impacted include...
Bennington, Arlington, Londonderry, Townshend, Salem, Manchester,
Stratton, Shaftsbury, Dorset, Saxtons River, Newfane, Manchester
Center, West Wardsboro, Windham, Porter, Rockingham, White Creek,
North Bennington, Dover and Jamaica.
LAT...LON 4303 7253 4275 7328 4294 7328 4295 7336
4306 7332 4317 7354 4332 7328 4330 7299
4329 7299 4330 7297 4330 7282 4325 7282
4322 7269 4323 7245
TIME...MOT...LOC 0216Z 236DEG 40KT 4318 7337 4311 7323 4274 7338
DBTSpecial Weather Statement
National Weather Service Albany NY
1022 PM EDT Mon Jun 21 2021
NYZ054-VTZ013>015-220315-
Eastern Rensselaer-Eastern Windham-Western Windham-Bennington-
1022 PM EDT Mon Jun 21 2021
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHEASTERN
RENSSELAER...SOUTHERN BENNINGTON AND SOUTHERN WINDHAM COUNTIES...
At 1022 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Berlin to near Stephentown. Movement
was east at 35 mph.
Winds in excess of 40 mph are possible with these storms.
Locations impacted include...
Pownal, Stephentown, Berlin, Wilmington, Stamford, Readsboro,
Newfane, Guilford Center, Whitingham, Marlboro, Halifax, East Nassau,
Jacksonville, South Newfane, Garfield, North Stephentown, West
Stephentown, Readsboro Falls, Hoag Corners and Taborton.
LAT...LON 4273 7263 4275 7326 4251 7335 4249 7354
4267 7350 4304 7252
TIME...MOT...LOC 0222Z 250DEG 30KT 4270 7343 4251 7348
DBTSpecial Weather Statement
National Weather Service Albany NY
1023 PM EDT Mon Jun 21 2021
CTZ001-013-MAZ001-025-220300-
Southern Litchfield-Northern Litchfield-Northern Berkshire-Southern
Berkshire-
1023 PM EDT Mon Jun 21 2021
...A BROKEN LINE OF STRONG THUNDERSTORM WILL AFFECT LITCHFIELD AND
BERKSHIRE COUNTIES...
At 1023 PM EDT, a strong thunderstorm was located over Housatonic, or
near Great Barrington, moving northeast at 45 mph.
Winds in excess of 40 mph are possible with this storm.
Locations impacted include...
Pittsfield, Torrington, New Milford, North Adams, Great Barrington,
Sherman, Adams, Thomaston, Williamstown, Lee, Lenox, Sheffield,
Cheshire, Kent, Sharon, Becket, Norfolk, Otis, Litchfield and Canaan.
LAT...LON 4151 7339 4149 7344 4169 7352 4220 7347
4275 7326 4274 7303 4270 7302 4270 7297
4239 7301 4238 7307 4233 7306 4231 7300
4216 7303 4215 7307 4204 7306 4204 7302
4159 7306 4156 7316 4153 7316 4148 7336
TIME...MOT...LOC 0223Z 240DEG 49KT 4226 7340
MSEThe Albany radar (KENX), 69 km away, was scanning. The volume nearest the first event began at 02:37 UTC.
1 thunderstorm wind. Local standard time, as filed.
A tree was downed on US Route 7 at Cold Spring Road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Massachusetts in 2021Every state in 2021This day in weather historyWarnings in Massachusetts, 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: 967195.