Showers and thunderstorms developed in response to an upper level low situated over the region. A few of these storms became severe with several reports of large hail and two reports of downed trees.
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.
Showers and thunderstorms developed in response to an upper level low situated over the region. A few of these storms became severe with several reports of large hail and two reports of downed 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 Albany, NY wrote its last area forecast discussion before the first event at Jun 29, 12:34 PM EST, 1 hour 26 minutes earlier.
AREA FORECAST DISCUSSION National Weather Service Albany NY 134 PM EDT Mon Jun 29 2020 .SYNOPSIS... An upper level low will settle over the region through the first half of this week. The main impacts will be from showers and thunderstorms, especially during the afternoon and evening hours, with overnight patchy fog. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... As of 130 PM EDT, clusters of showers/thunderstorms continue to drop southward from western Warren/Saratoga counties into Schenectady County, as well as across the southern Greens of VT, and Litchfield Hills/Berkshires. Frequent CG's and locally very heavy rainfall are the main attributes associated with these storms thus far. Temps have warmed into the lower 80s in some valley areas where sufficient sunshine has broken through. Mainly 70s elsewhere. Latest 12Z/KALY sounding suggests fairly steep mid level lapse rates, around 6.5-7 C/km (H7-H5). This pocket of steep lapse rates is expected to slowly migrate southward this afternoon. Convective temps are around 75 degrees, so would current convection to continue dropping southward and increasing in areal coverage through this afternoon. 0-6 KM bulk shear remains weak, generally 15-20 KT, except slightly stronger, 20-25 KT across southern areas (SE Catskills, mid Hudson Valley and NW CT). Expect showers and isolated thunderstorms to increase in coverage later this morning through mid afternoon, with the possibility of cells merging into small clusters and/or line segments. DCAPES are forecast to remain under 600 J/kg, although pockets of higher values will be possible in southern areas. So, isolated gusty winds can not be ruled out, especially within any slight bowing segments that develop. Also, small hail is possible given steep lapse rates and WBZ heights between 10-11 Kft. It appears that the most likely overlap of slightly greater deep layer shear, and instability including steep mid level lapse rates will once again be across southern areas during this afternoon, which is where best potential would be for isolated marginally severe hail and/or strong wind gusts. All areas will be susceptible to locally heavy rain, with PWAT's around 1.5" Rainfall rates of 1-2 inches per hour will be possible, and there is some training potential, especially across some higher terrain areas within the southern Greens/Berkshires, and perhaps the Helderbergs and NE Catskills, so localized minor flooding of urban/poor drainage and low lying areas is possible, and can not rule out isolated flash flooding where multiple rounds of thunderstorms occur, especially if coincident where locally heavy rainfall fell over the weekend. Highs should reach the lower/mid 80s in valleys, and 70s across higher elevations. Temps will likely cool back into the mid 60s to lower/mid 70s once any showers/thunderstorms occur. && .SHORT TERM /6 PM THIS EVENING THROUGH WEDNESDAY NIGHT/... With the loss of daytime heating, so will the degree of instability and lowering the probabilities of lightning production. So we will transition toward showers which this too is expected to decrease in coverage tonight. As per the last couple of nights, potential for some patchy dense fog which was continued in the forecast/grids. Overnight lows generally into the lower half of the 60s with some upr 50s for the higher terrain. Generally speaking, the forecast is nearly a carbon copy the next couple of afternoons and evenings as upper low is quasi- stationary across southern New England. Series of short waves on the backside of this low, along with differential heating boundaries and reaching our convective temperatures into the mid-upr 70s, will result in additional convection. As per previous excellent AFD's, potential for heavy rainfall remains. Of note is the forecast decrease in overall surface based instabilities as those CAPES drop back a few more hundred J/Kg each afternoon as this is likely due to more cloud coverage within the model RH fields. Regardless, threat for some additional rainfall (which is needed for most areas) each afternoon and evening. At night, if any breaks develop in the clouds, areas of fog will be possible, especially in areas which receive heavier rainfall earlier in the day. Highs reach afternoon in the mid 70s to lower 80s, and nighttime lows mainly in the mid 50s to lower 60s. && .LONG TERM /THURSDAY THROUGH SUNDAY/... Medium-range deterministic models and ensembles continue to show a general trough-ridge-trough pattern over the CONUS for the end of the week into the holiday weekend, but with some modifications from the pattern that is currently in place. For one, the upper low currently over the Northeast is forecast to lift out. While the main 850 mb positive temperature anomaly will be located to our north and west, some of this warmer air may fold into our area. Coverage of showers and thunderstorms should be diminished compared with Mon-Wed as well, although with baggy troughing still over the area, some 20- 30 PoPs are warranted Thursday into Saturday. Temps are likely to be a bit above normal during this period. && .AVIATION /18Z MONDAY THROUGH SATURDAY/... Main concerns for the terminals during the TAF period includes 1) the chance for showers and thunderstorms over all terminals through about 22-23z and 2) the potential for low stratus/fog development and impacts late tonight and during the overnight hours. As of 12:15pm EDT, there's been an increased cumulus field over eastern New York and western New England per GOES-16 visible satellite imagery with shower and thunderstorms having already initiated per WSR-88D doppler radar over southern Vermont and the northeastern sections of New York (e.g. Warren & Saratoga counties). Shower and thunderstorm activity/coverage courtesy of troughing aloft and additional diurnal heating is expected to expand and shift southwards across the FA through about 22-23z. Any thunderstorms will be capable of bringing categories (cigs/vsbys) down to MVFR levels across the terminals. Otherwise, expect VFR conditions. Once past 23z, showers should really begin to decrease in coverage and intensity. Given the antecedent low level moisture availability via recent rains and Td in the 60s, there's yet again another potential for fog/low level stratus clouds to develop (per low dewpoint depressions) over the area tonight for around 6z. Current thinking is that KALB/KPOU/KPSF will have the best chance for fog development, with KGFL having the potential for low stratus impacts. Should fog/low level stratus develop tonight, it has the potential to reduce categories down to IFR and even LIFR. Winds are expected to remain light 5-10 kts out of the northwest to northeast during the day before becoming more light and variable (less than 5 kts) to even calm tonight. Outlook... Tuesday: High Operational Impact. Likely SHRA...TSRA. Tuesday Night: Moderate Operational Impact. Scattered SHRA...FG...TSRA. Wednesday: High Operational Impact. Numerous SHRA...TSRA. Wednesday Night: Moderate Operational Impact. Scattered SHRA...TSRA. Thursday: Low Operational Impact. Slight Chance of SHRA...TSRA. Thursday Night: No Operational Impact. NO SIG WX. Friday: Low Operational Impact. Slight Chance of SHRA. Friday Night: Low Operational Impact. Slight Chance of SHRA. Independence Day: Moderate Operational Impact. Chance of SHRA. && .FIRE WEATHER... Periodic showers and thunderstorms, mainly during the afternoon and evening hours, will impact the region the next few days. An upper low nearly stationary across western New England will keep the weather unsettled. Winds will generally be from the northwest to north today, and north to northeast Tuesday and Wednesday at 5-15 mph, trending to less than 5 mph each night. Areas of low stratus and fog are also expected with dew formation. Winds will be stronger, and variable in direction in and near thunderstorms. && .HYDROLOGY... Latest excessive rainfall outlooks from WPC has a marginal risk for day 1 (today into Tuesday morning) for most of the region and day 2 (Tuesday into Wednesday morning) for areas immediately north and northeast of the mid-Hudson Valley. Numerous showers and thunderstorms are expected through Wednesday, mainly in the afternoon and evening hours, which will be slow moving and may produce locally heavy rainfall. Some flooding of urban/poor drainage and low lying areas will be possible during this time, especially in areas where multiple rounds of showers and thunderstorms occur. Larger stem river flooding appears unlikely due to the anomalously dry conditions over the last few months and via the drought monitor. 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 NEAR TERM...KL/BGM SHORT TERM...BGM LONG TERM...Thompson AVIATION...Evbuoma FIRE WEATHER...KL/BGM HYDROLOGY...KL/BGM
Hazardous Weather Outlook National Weather Service Albany NY 435 AM EDT Mon Jun 29 2020 CTZ001-013-MAZ001-025-NYZ032-033-038>043-047>054-058>061-063>066- 082>084-VTZ013>015-301100- Northern Litchfield-Southern Litchfield-Northern Berkshire- Southern Berkshire-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-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- 435 AM EDT Mon Jun 29 2020 This Hazardous Weather Outlook is for northwestern Connecticut, western Massachusetts, east central New York and southern Vermont. .DAY ONE...Today and tonight. Showers and thunderstorms are expected, mainly during the afternoon and evening hours. Some thunderstorms may contain small hail. In addition, thunderstorms may contain locally heavy downpours, with flooding of poor drainage and low lying areas possible. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Showers and thunderstorms are likely again Tuesday through Wednesday, mainly during the afternoon and evening hours. Some thunderstorms may contain small hail. In addition, thunderstorms may contain locally heavy downpours, with flooding of poor drainage and low lying areas possible. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to relay reports of hail, rainfall amounts and flooding to the National Weather Service in Albany while following all local, state and CDC safety guidelines.
Special Weather Statement
National Weather Service Albany NY
234 PM EDT Mon Jun 29 2020
CTZ001-013-291915-
Northern Litchfield-Southern Litchfield-
234 PM EDT Mon Jun 29 2020
...A STRONG THUNDERSTORM WILL AFFECT CENTRAL LITCHFIELD COUNTY...
At 234 PM EDT, a strong thunderstorm was located over Torrington,
moving south at 20 mph.
Winds in excess of 30 mph and pea size hail are possible with this
storm. Rainfall rates may exceed one inch per hour.
Locations impacted include...
Torrington, Thomaston, Litchfield, Northwest Harwinton, Oakville,
Terryville, Winsted, Woodbury Center, Watertown, Plymouth, Woodbury,
Harwinton, Bethlehem, Goshen, Morris, Bantam, South Norfolk, West
Torrington, Torringford and Hotchkissville.
Torrential 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 4194 7333 4195 7304 4180 7300 4180 7301
4179 7302 4164 7298 4163 7302 4161 7302
4161 7306 4159 7306 4159 7308 4157 7309
4156 7316 4154 7316 4152 7326
TIME...MOT...LOC 1834Z 354DEG 19KT 4183 7315
FrugisSpecial Weather Statement
National Weather Service Albany NY
239 PM EDT Mon Jun 29 2020
NYZ052-059-291915-
Eastern Albany-Eastern Greene-
239 PM EDT Mon Jun 29 2020
...A STRONG THUNDERSTORM WILL AFFECT SOUTH CENTRAL ALBANY AND
NORTHEASTERN GREENE COUNTIES...
At 239 PM EDT, a strong thunderstorm was located near Westerlo, or 10
miles southwest of Delmar, moving south at 20 mph.
Winds in excess of 30 mph are possible with this storm.
Locations impacted include...
Keefers Corners, Medway, Sanfords Corners, East Greenville,
Greenville Center, Grapeville, Surprise, Dormansville, Alcove and
Newrys.
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 4257 7396 4240 7385 4237 7400 4248 7403
4255 7403
TIME...MOT...LOC 1839Z 338DEG 18KT 4252 7398
JPVSpecial Weather Statement National Weather Service Albany NY 246 PM EDT Mon Jun 29 2020 NYZ049-050-052-291915- Eastern Albany-Eastern Schenectady-Southern Saratoga- 246 PM EDT Mon Jun 29 2020 ...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL SCHENECTADY AND SOUTH CENTRAL SARATOGA COUNTIES... At 245 PM EDT, a strong thunderstorm was located over Clifton Park, moving south at 10 mph. Winds in excess of 30 mph are possible with this storm. Locations impacted include... Clifton Park, Cohoes, Country Knolls, Groom Corners, Flagler Corners, Boght Corners, Elnora, Grays Corners, Dunsbach Ferry, Crescent Station, Mohawk View, Vischer Ferry, Clifton Park Center and Crescent. This includes Interstate 87 between exits 8A and 10. Torrential rainfall is also occurring with this storm, and may cause localized flooding. Do not drive your vehicle through flooded roadways. LAT...LON 4289 7389 4291 7378 4278 7371 4276 7386 TIME...MOT...LOC 1845Z 352DEG 11KT 4286 7382 JPV
Special Weather Statement
National Weather Service Albany NY
249 PM EDT Mon Jun 29 2020
NYZ083-291915-
Southeast Warren-
249 PM EDT Mon Jun 29 2020
...A THUNDERSTORM WITH HEAVY RAINFALL WILL AFFECT SOUTH CENTRAL
WARREN COUNTY...
At 249 PM EDT, a thunderstorm was located over Lake Luzerne
Campground, or near Lake George Village, moving south at 10 mph.
Locations impacted include...
Lake Luzerne Campground, Lake Luzerne, Beartown, Fourth Lake, Lake
Luzerne-Hadley and Lake Vanare.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
LAT...LON 4332 7371 4329 7383 4331 7383 4331 7384
4341 7385 4343 7377 4343 7376
TIME...MOT...LOC 1849Z 350DEG 8KT 4339 7380
JPVSpecial Weather Statement
National Weather Service Albany NY
251 PM EDT Mon Jun 29 2020
NYZ050-291915-
Southern Saratoga-
251 PM EDT Mon Jun 29 2020
...A STRONG THUNDERSTORM WILL AFFECT SOUTH CENTRAL SARATOGA COUNTY...
At 251 PM EDT, a strong thunderstorm was located over North Ballston
Spa, or 7 miles southwest of Saratoga Springs, moving southeast at 15
mph.
Winds in excess of 30 mph and pea size hail are possible with this
storm.
Locations impacted include...
Ballston Spa, Round Lake, Burnt Hills, North Ballston Spa, Country
Knolls, South Galway Corner, Maltaville, West Corners, West Milton,
Birchton, Garrison Manor, Harmony Corners, Ballston Lake and Ballston
Center.
This includes Interstate 87 between exits 11 and 12.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
LAT...LON 4305 7392 4301 7384 4293 7376 4289 7390
4291 7390 4291 7392 4302 7399
TIME...MOT...LOC 1851Z 332DEG 13KT 4301 7390
JPVSpecial Weather Statement
National Weather Service Albany NY
257 PM EDT Mon Jun 29 2020
NYZ050-291930-
Southern Saratoga-
257 PM EDT Mon Jun 29 2020
...A STRONG THUNDERSTORM WILL AFFECT SOUTH CENTRAL SARATOGA COUNTY...
At 257 PM EDT, a strong thunderstorm was located over Ballston Spa,
or 7 miles southwest of Saratoga Springs, moving southeast at 15 mph.
Winds in excess of 40 mph and half inch hail are possible with this
storm.
Locations impacted include...
Ballston Spa, Round Lake, Burnt Hills, Country Knolls, Jonesville,
Harmony Corners, Ballston Lake, Ballston Center, Birchton, Garrison
Manor and Maltaville.
This includes Interstate 87 near exit 11.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
LAT...LON 4301 7398 4304 7391 4301 7384 4292 7376
4288 7390 4291 7390 4291 7392
TIME...MOT...LOC 1857Z 332DEG 13KT 4298 7388
JPVThe Albany radar (KENX), 39 km away, was scanning. The volume nearest the first event began at 18:57 UTC.
5 hail, 2 thunderstorm wind. Local standard time, as filed.
A tree was downed onto a powerline on East Main Street. Time estimated by radar.
A tree was downed onto a powerline near Guy Park Ave and Evelyn Street. Time estimated by radar.
Hail of various sizes was reported with the largest being golf-ball sized hail.
Hail slightly larger than quarters reported in the town of Ardonia. Time estimated by radar.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2020Every state in 2020This day in weather historyWarnings in New York, June 2020
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: 899285, 899286, 899280, 899281, 899282, 899283, 899284.