A cold front moving through the region sparked showers and thunderstorms during the afternoon hours of Sunday, June 28th, 2020. A few storms became severe with two reports of hail and one report of a barn roof being damaged in Montgomery county.
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 cold front moving through the region sparked showers and thunderstorms during the afternoon hours of Sunday, June 28th, 2020. A few storms became severe with two reports of hail and one report of a barn roof being damaged in Montgomery county.
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 28, 9:19 AM EST, 1 hour 51 minutes earlier.
AREA FORECAST DISCUSSION National Weather Service Albany NY 1019 AM EDT Sun Jun 28 2020 .SYNOPSIS... A cold front and an upper level disturbance will bring showers and thunderstorms to eastern New York and western New England today. Some of the thunderstorms may be strong to severe with damaging winds and large hail this afternoon into early this evening. Intermittent afternoon and early evening showers and thunderstorms will continue Monday into the middle of next week, as an upper level low remains over New York and New England. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... A Marginal to Slight Risk for Severe Thunderstorms this afternoon into this evening for most of the forecast area... As of 1020 AM EDT, isolated/scattered showers and thunderstorms have already developed, with one small cluster over Schenectady County and tracking east/southeast, and another across nothern Herkimer County extending east through NW Warren County. Locally heavy downpours have been accompanying these showers/storms, with a quick 0.44 inches measured in less than 15 minutes at the NYS mesonet site at Sprakers earlier. Radar estimates of 0.5-1 inches already occurring across portions of the SW Adirondacks. Also, can not rule out some briefly gusty winds up to 35 mph and some pea sized hail with any slightly stronger storms over the next 1-2 hours. These current storms appear to be tied to increased forcing ahead of an embedded compact shortwave/vort max heading east across the northern Adirondacks. Also, the cold front was approaching from the west, as it currently was located along the southern/eastern shores of Lake Ontario. This lead cluster of storms will continue heading east, and appears to be rooted above the boundary layer given abundant cloud coverage in place ahead of feature. However, expect additional convection to develop closer to the cold front and move across the region midday through this afternoon. SPC has expanded the Marginal and Slight Risk areas slightly farther north and west, with expectation for some locally strong/damaging wind gusts and marginally severe hail possible. Previous discussion has more details and follows... As of 630 AM EDT...The forecast area has entered a warm sector with the warm front lifting north and east of the Hudson River Valley and into western/central New England this morning. Low- level stratus has formed as well as patchy to areas of fog some of which is locally dense in the Hudson River Valley, Mohawk Valley and Berkshires. An SPS was issued to cover the local to areas of dense fog. A prefrontal disturbance and a short-wave is moving across central NY with some isolated to scattered showers and a few thunderstorms. These may reach locations west of the Hudson River Valley in the next few hours, but likely will weaken. The fog and stratus should burn off gradually between 8 am and 10 am. A mid and upper level trough over eastern Ontario and south- central Quebec will dig equatorward with low and mid-level heights falling today with an approaching cold front and an upper level disturbance. A weak sfc low or trough will also move along the frontal boundary. Plenty of low-level moisture will be in place with sfc dewpts in the 60s with some mid and upper 60s likely from the Capital Region south and east. The upper level jet will be positioned to the southwest of the forecast area and some areas will be near the left front quadrant of the H250 jet streak with good upper level divergence. The 0-6 km shear is weaker north of the Capital Region with generally 15-20 KT, but 0-6 km bulk shear values are 20-30 KTs from roughly southern VT, the Greater Capital Region, and the eastern Catskills south and east. The 00Z HREFS have mean SBCAPE values of 1000-2000 J/kg this afternoon with some pockets of 2000-2500 J/kg in the southern most zones. MLCAPE values are 1000-1500 J/kg. DCAPE values look to range about 600-900 J/kg. Mid-level lapse rate could be a little steeper, but are close to 6.5C/km on the latest 00Z GFS. Overall, multi-cells will likely develop ahead of the multiple lifting mechanisms around noontime over the southern Adirondacks, Lake George Region, Mohawk Valley, eastern Catskills, and western reaches of the Capital Region and then spread eastward in the early to mid pm. We expect some multi-cell clusters or lines to form with damaging winds from potential bowing segments and large hail 1" in diameter or greater possible. SPC added a Slight Risk area from just south of Albany, clipping Rensselaer County, as well as Windham County VT. The Berkshires, Mid Hudson Valley, eastern Catskills, southern and central Taconics, as well as Litchfield County are in the Slight Risk area. We are in pretty good agreement, but think points north and west into the Marginal Risk have also a decent chance for some severe thunderstorms too. The latest 3-km HRRR and ARW-WRF simulate reflectivity products show numerous convective cells firing. The 3-km NAMnest has slightly less coverage, and is more focused south and east of Albany. With multiple boundaries it will likely be an active day. We kept small hail and gusty winds in the gridded forecasts this afternoon into the early evening, except across Herkimer and portions of northern Hamilton Counties. PWATs are not highly anomalous, as they will be in the 1-1.66" range with the highest values near the mid Hudson Valley and NW CT. Some locally heavy downpours are possible. These PWATs are a little over one STDEV above normal based on the latest GEFS. Max temps will be in the lower to mid 80s in the valleys, and 70s over the higher terrain with some spotty upper 60s over the high peaks. && .SHORT TERM /6 PM THIS EVENING THROUGH TUESDAY/... Tonight...The strong to severe thunderstorms continue in the late pm and early evening, but should diminish shortly after sunset. The showers may be the most persistent east of the Hudson River Valley before decreasing. Others may pop-up over the southern Adirondacks and locations northwest of Albany, as the closed H500 upper level low settles southward. Some patchy fog may form again and it could be locally dense depending on what areas got soaked. Despite weak cold advection in the wake of the weak cold front, it will remain fairly muggy with lows in the 60-65F range in the lower elevations, and mid 50s to around 60F over the higher terrain. Monday...This pattern will be repetitive the next few days with a closed/cutoff upper level over eastern NY and New England with pieces of short-wave spinning around it focusing showers and thunderstorms. The cold pool aloft will be about -12C to -15C at 500 hPa. Sfc dewpts in the upper 50s to mid 60s with some sfc heating support instability values in the 1000-1500 J/kg range with slightly higher values around. The 0-6 km shear is not very strong, but some loosely organized convection or multi-cells are possible. We are not outlooked, but isolated to scattered showers and thunderstorms with some sub-severe hail and gusty winds are possible. Would not rule out a few marginally severe thunderstorms too. Highs are expected to be in the upper 70s to lower 80s in the valley areas, and upper 60s to mid/upper 70s over the hill towns and mtns. PWATS remain about 1-1.50" some some localized moderate to heavy rainfall is possible, especially with any slow movers or training cells in the the north to northwest flow aloft. Mon Night...The thunderstorms should diminish with the loss of the daytime heating. Some showers may be persistent north and east of the Capital Region with the cyclonic vorticity advection continuing around the closed/cut-off lows. Patchy fog may form again especially with any clearing. Lows will be similar to the previous night with mid 50s to lower 60s. Tuesday...Some variability in the guidance where the upper low is centered for this day. The 00Z NAM is centered over eastern NY and western New England border with the cold pool at H500 at -15C to -16C. The latest 00Z ECMWF/GFS are slightly further east over New England. The upper lows cold pool and cyclonic vorticity advection will focus scattered to numerous showers and isolated to scattered thunderstorms again. Instability may be similar to MON, but perhaps a little less over northern zones with 500-1500 J/kg with modest to weak shear, so not expecting widespread severe potential. Slight cooler temps under the upper low with mid 60s to lower/mid 70s over the hills and mtns, and upper 70s to around 80F in the valleys. && .LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/... Per the previous couple of discussions, rex-blocking upper pattern remains in place as upper low remains nearly quasi-stationary Tuesday night into most of Wednesday night across the local area. This will keep our weather unsettled with mainly diurnally driven convection. In addition, as winds aloft will be lighter than usual and where convection is able to sustain, some locally moderate to heavy rainfall may occur. Global models suggest the better coverage of precipitation will occur on Wednesday as short wave timing around the backside of this upper low will track across the region. Eventually, this upper low will weaken and begin to drift southward as an evolving strong impulse from James/Hudson Bay slides south for the later half of this week. In fact, this feature will likely bring a backdoor cold front southward sometime on Friday with another potential for some convection. Now, as with all extended models, there is now a suggestion that the front will be nearly stationary, north to south, across eastern NY on July 4th. If so, then another chance of convection with daytime heating will exist but should dissipate by sunset Saturday evening. As for temperatures through the long term, summer-like values are expected through the mid-week period with lows mainly into the 60s and highs well into the 70s for the terrain and 80s elsewhere. The challenge arrives with the timing and position of the backdoor cold front. Could see a good temperature contrast set up Friday night into Saturday across the county warning area. For now, a MOS blended approach with around 80F for valley locations and 70s elsewhere with overnight lows into the 50s and lower 60s. && .AVIATION /14Z SUNDAY THROUGH THURSDAY/... IFR conditions were in place for all TAF locations this morning. Furthermore, clouds from decaying showers upstream may limit the quick recovery the next couple of hours. So we will hold onto a TEMPO group for IFR conditions. Then with more daylight hours this morning, combination of approaching frontal boundary and upper level disturbance will result in scattered convection. This will allow for MVFR with a period of VFR conditions before the convection develops. While difficult to time exact locations where these will occur, we will place a TEMPO group from around Noon-1pm and into the afternoon hours for TSRA. Winds will generally be southerly to southwesterly less than 10kts, but higher in the vicinity of thunderstorms. In the wake of the convection and frontal passage, a light northerly wind is expected. However, ample low level moisture remains in place where additional flight restrictions may result in a period of MVFR or IFR later tonight. Outlook... Monday Night: Low Operational Impact. Slight Chance of SHRA...TSRA. Tuesday: High Operational Impact. Likely SHRA...TSRA. Tuesday Night: Moderate Operational Impact. Chance of SHRA. Wednesday: Moderate Operational Impact. Chance of SHRA...TSRA. Wednesday Night: Moderate Operational Impact. Chance of SHRA. Thursday: Low Operational Impact. Slight Chance of SHRA...TSRA. && .FIRE WEATHER... A cold front and an upper level disturbance will bring showers and thunderstorms to eastern New York and western New England today. Some of the thunderstorms may be strong to severe with damaging winds and large hail this afternoon into early this evening. Intermittent afternoon and early evening showers and thunderstorms will continue Monday into the middle of next week, as an upper level low remains over New York and New England. The RH values fall to 50-65 percent this afternoon, and then increase to 90-100 percent Monday morning with widespread dew formation and some areas of fog possible. The RH values will lower to 45 to 70 percent Monday afternoon. The winds will shift from the south to southwest to the west to northwest at 5-15 mph by this afternoon, with some gusts up to 20 mph possible. The winds will become northwest to north at 10 mph or less Sunday night into Monday. Winds will be stronger, and variable in direction in and near any thunderstorms Sunday into Sunday night. && .HYDROLOGY... An unsettled weather pattern closing the weekend into the middle of next week will keep chances of showers and thunderstorms ongoing for the ALY Hydro Service Area, which should help alleviate some of the DO and D1 conditions (abnormally dry to moderate drought) over large portions of the area. Isolated to scattered showers/thunderstorms are expected Sunday through mid week, mainly during the afternoon/evening hours. Locally heavy downpours may lead to some ponding of water in urban/poor drainage and low lying areas, especially any areas where multiple rounds of showers/thunderstorms occur. No problems are expected on the main stem river levels at this time with below normal flows for late June. Overall, river levels are not expected to exhibit significant rises at this time, due to limited areal coverage of showers and thunderstorms. 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...Wasula NEAR TERM...KL/Wasula SHORT TERM...Wasula LONG TERM...BGM AVIATION...BGM FIRE WEATHER...KL/Wasula HYDROLOGY...KL/Wasula
Hazardous Weather Outlook National Weather Service Albany NY 439 AM EDT Sun Jun 28 2020 CTZ001-013-MAZ001-025-NYZ033-039>043-047>054-058>061-063>066-082>084- VTZ013>015-291100- Northern Litchfield-Southern Litchfield-Northern Berkshire- Southern Berkshire-Hamilton-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- 439 AM EDT Sun Jun 28 2020 This Hazardous Weather Outlook is for northwestern Connecticut, western Massachusetts, eastern New York excluding Herkimer County and southern Vermont. .DAY ONE...Today and tonight. There is a Marginal to Slight Risk for severe thunderstorms this afternoon into the early evening ahead of a cold front and an upper level disturbance. Some of the thunderstorms could contain large hail one inch in diameter or greater and or damaging winds 58 mph or greater. .DAYS TWO THROUGH SEVEN...Monday through Saturday. There is a chance of thunderstorms Monday and Tuesday, mainly during the afternoon and evening hours. .SPOTTER INFORMATION STATEMENT... Spotter activation will likely be needed. Please relay any information about severe weather to the NWS while following local, state and CDC guidelines. NYZ032-038-291100- Northern Herkimer-Southern Herkimer- 439 AM EDT Sun Jun 28 2020 This Hazardous Weather Outlook is for Herkimer County in eastern New York. .DAY ONE...Today and tonight. There is a chance of thunderstorms this afternoon into the early evening. Some thunderstorms may contain small hail and gusty winds. .DAYS TWO THROUGH SEVEN...Monday through Saturday. There is a chance of thunderstorms Monday and Tuesday, mainly during the afternoon and evening hours. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
Special Weather Statement
National Weather Service Albany NY
1003 AM EDT Sun Jun 28 2020
NYZ048>052-281445-
Eastern Albany-Eastern Schenectady-Western Schenectady-Southern
Saratoga-Western Albany-
1003 AM EDT Sun Jun 28 2020
...A STRONG THUNDERSTORM WILL AFFECT SCHENECTADY AND NORTHWESTERN
ALBANY COUNTIES...
At 1003 AM EDT, a strong thunderstorm was located over Duanesburg, or
10 miles west of Rotterdam, moving east southeast at 25 mph.
Winds in excess of 30 mph and pea size hail are possible with this
storm.
Locations impacted include...
Albany, Schenectady, Rotterdam, Colonie, Scotia, Delmar, Guilderland,
Niskayuna, Duanesburg, Voorheesville, Altamont, Delanson, East
Glenville, New Scotland, Princetown, Duane, Gifford, Karlsfeld,
Quaker Street and Schonowe.
This includes the following highways...
Interstate 88 between exits 24 and 25.
Interstate 90 between exits 1W and 26.
Interstate 890 between exits 1b and 9.
Interstate 87 between exits 24 and 2.
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 4282 7424 4285 7419 4283 7380 4261 7384
4269 7417 4272 7417 4273 7418 4271 7419
4271 7420 4272 7424 4271 7426
TIME...MOT...LOC 1403Z 278DEG 21KT 4278 7416
KSLSpecial Weather Statement
National Weather Service Albany NY
1107 AM EDT Sun Jun 28 2020
NYZ042-281545-
Northern Warren-
1107 AM EDT Sun Jun 28 2020
...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN WARREN COUNTY...
At 1107 AM EDT, a strong thunderstorm was located 8 miles west of
Johnsburg, or 12 miles east of Speculator, moving east at 20 mph.
Winds in excess of 30 mph and pea size hail are possible with this
storm.
Locations impacted include...
Warrensburg, Johnsburg, North Creek, Thurman, Garnet Lake, Thurman
Station, Sodom, Riparius, Edwards Hill, Wevertown, Holcombville,
Bakers Mills, High Street and Athol.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
LAT...LON 4347 7379 4348 7418 4365 7420 4367 7420
4374 7382
TIME...MOT...LOC 1507Z 264DEG 16KT 4359 7413
KSLSpecial Weather Statement
National Weather Service Albany NY
1142 AM EDT Sun Jun 28 2020
NYZ042-281630-
Northern Warren-
1142 AM EDT Sun Jun 28 2020
...A STRONG THUNDERSTORM WILL AFFECT CENTRAL WARREN COUNTY...
At 1142 AM EDT, a strong thunderstorm was located near Warrensburg,
moving east at 20 mph.
Winds in excess of 30 mph and pea size hail are possible with this
storm.
Locations impacted include...
Warrensburg, Chestertown, Bolton Landing, Bolton, Thurman,
Cleverdale, Wevertown, Diamond Point, South Horicon, Riverbank,
Rockhurst, North Bolton, Darrowsville and Pilot Knob.
This includes Interstate 87 between exits 23 and 24.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
LAT...LON 4367 7358 4356 7361 4355 7361 4354 7362
4352 7362 4352 7363 4346 7363 4351 7394
4364 7395
TIME...MOT...LOC 1542Z 273DEG 15KT 4357 7386
KSLThe Albany radar (KENX), 51 km away, was scanning. The volume nearest the first event began at 16:08 UTC.
2 hail, 1 thunderstorm wind, 1 lightning. Local standard time, as filed.
Half of a large barn steel roof was damaged. Another single story barn had about 24 feet of roof peel back from the eves and an old garage with corrugated steel roof lost metal on both sides. Time estimated by radar.
A portion of a barn roof was damaged due to lightning.
Nickel sized hail was reported. Time estimated from 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: 899279, 899305, 899277, 899278.