Friday, August 3, 2018
Significant Flash Flood Event
Scattered Severe
EF0 Tornado near Halcott Center Greene County from 12:24pm-12:32pm

Albany Doppler radar base reflectivity image at 1:09 pm Friday August 3, 2018: Torrential thunderstorm with damaging wind and frequent lightning over downtown Albany. Heavy rain trained over the city from 1pm through 2:30pm. 1.89" of rain fell at the Freihofer's weather station at 99 Washington Avenue in downtown between 12:54pm and 2:25pm leading to significant flash flooding in and around Albany. A total of 2.38" of rain fell at the Freihofer's location through 11:30pm. This was the third significant flash flood event for the city of the summer with flooding on Friday July 27 as well as on July 5.

Torrential Rain over downtown Albany at 1:09pm, Friday August 3, 2018


Serious flooding on Hackett Blvd. in Albany with roads temporarily closed through the city due to the inundations. Photo credit: Robbie Venditti

Torrential Rain over downtown Albany at 1:09pm, Friday August 3, 2018 

A plume of tropical moisture, flowing north from the Gulf of Mexico, was in place over eastern New York and western New England, the result of a quasi-stationary trough at the jet stream level centered over the Great Lakes states and extending south into the Gulf of Mexico, coupled with a quasi-stationary strong high pressure ridge centered over the western Atlantic. Small scale disturbances riding up the resultant moisture rich flow between the upper air features coupled with a slight eastward motion of the Great Lakes trough, triggered a period of downpours and locally severe thunderstorms from Delaware County through the immediate Capital Region to southern Vermont, the Catskills, mid Hudson valley, and Berkshire County from midday through the early evening with continued periods of rain, some locally torrential, into Saturday morning August 4.

THE SEVERE STORMS:
Partial sunshine across southern Vermont, the Berkshires, eastern Catskills, and the mid Hudson valley allowed temperatures to climb into the low 80s by the late morning and early afternoon, which coupled with dewpoints in the upper 60s to around 70° and moderate wind shear aloft, allowed for a string of severe thunderstorms to develop and train from SW to NE over northern Greene, eastern Albany, Rensselaer, southern Washington, and Bennington counties between noon and 3pm. These storms exhibited periodic mid level updraft rotation which supported damaging wind gusts and hail up to 1" in diameter as well as frequent cloud to ground lightning and torrential rain. One of the initial storms produced a weak tornado two miles north of Halcott Center in Greene County which tracked 1.9 miles between 12:24pm and 12:32pm. An Albany NWS damage survey team estimated peak winds with the tornado of 75 mph with a path of tree damage 200' wide.

TORNADO REPORT

RATING: EF0: Max winds to 75 mph

LOCATION: 2 miles north of Halcott Center - Greene County

TIME: 12:24pm TO 12:32pm Friday August 3, 2018

MAX PATH WIDTH: Approximately 200 Feet

PATH LENGTH: 1.9 Miles

Notes from ALB NWS: Many trees were snapped and uprooted along the path of the tornado. There was no observed damage to any structures

Rainfall amounts of 1.5" to 2.5" in one to two hours were common through the early to mid afternoon from the Capital Region east into southern Vermont with torrential rain and locally severe thunderstorms filling in across the mid Hudson valley and Berkshire County between 3 and 6pm.

Albany Doppler radar image at around 1:44pm Friday August 3, 2018: Severe thunderstorm over SE Albany and NE Greene counties moving NE at 25 mph. This storm exhibited mid level updraft rotation and went on to produce wind damage in Casteleton-on-Hudson.

Albany Doppler radar image at around 1:44pm of the severe t'storm over SE Albany and NE Greene counties, Friday August 3, 2018

Albany Doppler radar image at around 1:45pm Friday August 3, 2018: Severe thunderstorm over NE Rensselaer County moving northeast at 25 mph into southern Bennington County, VT. This storm also exhibited mid level updraft rotation as was responsible for producing wind damage and large hail.

Albany Doppler radar image at 1:45pm, Friday August 3, 2018


Instant Doppler 6 image at 2:36pm, Friday August 3, 2018 showing the axis of torrential rain and strong t'storms lined up from Bennington County south into eastern Greene and Ulster counties.

Instant Doppler 6 image at 2:36pm, Friday August 3, 2018

Radar rainfall estimate graphic through 8pm Friday August 3, 2018: The dark blue shaded regions are where 1.5" to 2.5" of rain fell on average with generally 1/2" to 1" elsewhere. Additional rainfall occurred across the region through midnight

Tornado, large hail, and damaging straight line wind producing supercell over Saugerties, May 15, 2018

Ominous skies over Catskill, Greene County just prior to torrential rains amounting to 2" to 2.55" in approximately one to two hours. Flash flooding occurred in and around Catskills and Coxsackie - photo credit: WeatherNet 6 spotter Steve Meicht

Ominous skies over Catskill, Greene County just prior to 2 to 2.5 inches of rain fell followed by flash flooding 

The Washington Park pond in downtown Albany flooding during the afternoon of Friday August 3, 2018 - photo credit: Robbie Venditti

Giant Hail in Canaan, CT, Litchfield County, Tuesday May 15, 2018 

Storm Prediction Center Storm Reports Graphic for Friday August 3, 2018 showing the locations of reported severe wind, wind damage, and large hail

Storm Reports for Friday August 3, 2018 


NWS Storm Reports for Friday August 3, 2018. Note, these reports are used to verify the NWS warnings which were issued for this event and therefore do not necessarily represent an accounting for all of the wind damage which may have occurred.

Town County Severe Weather Report Time
2 Miles N. of Halcott Center Greene EF0 Tornado: 75 mph winds, path length 1.9 miles, path width 200'. Trees snapped and uprooted 12:24-12:32pm
Clarksville Albany 1.80" of rain measured in 45 minutes 12:50pm
Hampton Manor Albany Wind damage/Flooding: Numerous trees blown down on wires, 6" of water on roadways 1:06pm
Hampton Manor Albany 1" diameter Hail 1:06pm
Schenectady Schenectady Measured 1.41" of rain 1:25pm
Poestenkill Rensselaer Wind damage: wires blown down 1:30pm
Schenectady Schenectady 1.32" of rain at the GE Plot, less than one hour 1:37pm
Albany Albany Flash Flood 1:44pm
Feura Bush Albany Wind damage: Route 144 closed between Corning Hill Road and Feura Bush Rd. due to trees and wires down 1:48pm
Delmar Albany Flash Flood: Elm Avenue flooded 2:00pm
Feura Bush Albany Basement wall collapse due to flooding 2:11pm
Castleton-on-Hudson Rensselaer Wind damage: Large tree limbs and wires blown down 2:15pm
Albany (Downtown) Albany Freihofer's rainfall measurement: 1.89" between 12:54pm and 2:24pm 2:24pm
Watervliet Albany Flash Flood 2:30pm
Albany Albany Flash Flood: Whitehall Rd and Kate St. closed due to flooding 2:40pm
Albany Albany Flash Flood: Medical transport vehicle submerged under water on Hackett Blvd. 2:53pm
Albany Albany Flash Flood: Flooding at Cortland and Colonial-water pouring into vehicles 2:53pm
Brunswick Rensselaer Flash Flood: Water flowing over Route 278, road closed 2:55pm
Beacon Dutchess Wind damage: Numerous trees and wires blown down 3:40pm
Wappingers Falls Dutchess Wind damage: Tree blown down onto a house on Merrywood Rd. 3:50pm
Fairview Dutchess Wind damage: Wires pulled from a house on Peter Cooper Rd. 3:56pm
Arlington Dutchess Wind damage: Two large trees blown down 3:59pm
New Baltimore Greene Heavy rain: 1.78" 4:00pm
Red Oaks Mill Dutchess Wind damage: Tree limbs blown down 4:02pm
Esopus Ulster Wind damage: Large tree limbs blown down 4:26pm
Rhinebeck Dutchess Wind damage: Numerous trees and wires blown down 4:27pm
Coxsackie Greene Flash Flood: Street flooding 4:30pm
Catskill Greene Flash Flood: Street flooding and damage to an assisted living home 4:30pm
Kingston Ulster Heavy rain: Measured 1.48" falling in 15 minutes between 4:30pm and 4:45pm 4:45pm
Claverack Columbia Heavy rain: Measured 1.50" 5:11pm
Elizaville Dutchess Heavy rain, 2.12" fell in 30 minutes 5:25pm
Pittsfield, MA Berkshire Wind damage: trees and wires blown down 5:30pm

WeatherNet 6 Storm Total Rainfall Reports - Friday August 3, 2018

Town
County
Rainfall Report
Town
County
Rainfall Report
Savoy, MA Berkshire 0.50" (11pm)      
           
Westmere Albany 1.00" (11pm) Glenmont Albany 1.97" (5pm)
Albany (Downtown) Albany 2.38" (11:30pm)      
           
Germantown Columbia 2.00" (5:30pm) Chatham Columbia 1.75" (6pm)
           
Arkville Delaware 4.05" (11pm) Denver Delaware 3.00" (11pm)
Roxbury Delaware 2.52" (11pm)      
           
Red Hook Dutchess 1.60" to 2.11" (6pm) Poughkeepsie Dutchess 0.18" (8:30pm)
           
Perth Fulton 0.29" (11pm)      
           
Halcott Center Greene 2.41" (8pm) Halcott Greene 1.80" (6:30pm)
Catskill Greene 2.27" to 2.55" (6:30pm)      
           
Wells Hamilton 0.10" (5:30pm)      
           
Florida Montgomery 0.53" (11pm) Fonda Montgomery 0.28" (5pm)
Palatine Bridge Montgomery 0.18" (5:30pm) Tribes Hill Montgomery 0.55" (5:30pm)
Amsterdam Montgomery 0.27" (5pm)      
           
Oneonta Otsego 1.10" (10pm) Worcester Otsego 1.00" (5pm)
           
Center Brunswick Rensselaer 1.75" (11pm) Speigletown Rensselaer 1.50" (4:30pm)
Troy (Downtown) Rensselaer 1.71" (11pm)      
           
Galway Saratoga 0.38" (11pm) Lake Desolation Saratoga 0.17" (11pm)
Ballston Spa Saratoga 0.25" (5:30pm) Saratoga Springs Saratoga 0.20" (5pm)
Clifton Park (Oaks) Saratoga 1.90" (11:30pm)      
           
Rotterdam Schenectady 1.52" (11pm) Duanesburg Schenectady 0.94" (11pm)
Delanson Schenectady 1.01" (5pm) Schenectady Schenectady 1.35"
           
Charlotteville Schoharie 1.15" (10pm) Warnerville Schoharie 1.12" (4:30pm)
           
Landgrove, VT Bennington 0.72" (11pm) Danby, VT Rutland 0.28" (6pm)
West Rutland, VT Rutland 0.15" (5pm)