A cold front and strong upper level trough moved across the Tri-State, triggering severe thunderstorms across Southeast New York during the afternoon.  This included both supercells and squall lines, producing severe winds and hail across the Lower Hudson Valley, New York City, and Long Island.

Hail in NASSAU, NEW YORK
From 24-JUN-10 13:55:00 to 24-JUN-10 13:55:00 (EST-5)
Location: ALBERTSON
Magnitude: 1.00 
Reported by: Trained Spotter

Quarter size hail was reported near Exit 39 of The Long Island Expressway (I-495).

Thunderstorm Wind in ORANGE, NEW YORK
From 24-JUN-10 12:00:00 to 24-JUN-10 12:00:00 (EST-5)
Location: MIDDLETOWN
Magnitude: 52.00 EG
Property damage: 7.50K
Reported by: Trained Spotter

A tree was reported down on a house on California Avenue.

Thunderstorm Wind in PUTNAM, NEW YORK
From 24-JUN-10 12:27:00 to 24-JUN-10 12:27:00 (EST-5)
Location: COLD SPGS
Magnitude: 52.00 EG
Property damage: 7.50K
Reported by: Park/Forest Service

A tree fell onto a car at Little Stony Point in Hudson Highlands State Park.

Thunderstorm Wind in PUTNAM, NEW YORK
From 24-JUN-10 12:45:00 to 24-JUN-10 12:45:00 (EST-5)
Location: HAVILAND HOLLOW
Magnitude: 61.00 EG
Property damage: 3.00K
Reported by: Public

A large tree was reported down across Route 22.

Thunderstorm Wind in QUEENS, NEW YORK
From 24-JUN-10 13:45:00 to 24-JUN-10 13:45:00 (EST-5)
Location: LITTLE NECK
Magnitude: 70.00 EG
Property damage: 100.00K
Reported by: Fire Department/Rescue

Numerous utility poles, street lamps, and trees were reported down in Northeastern Queens, with the worst damage in Little Neck and Douglaston. At least one chimney was collapsed, and trees fell on several vehicles, including a mini-van, totaling the vehicle, and destroying a double bass inside.

Thunderstorm Wind in NASSAU, NEW YORK
From 24-JUN-10 13:50:00 to 24-JUN-10 13:50:00 (EST-5)
Location: ROSLYN ESTATES
Magnitude: 52.00 EG
Crop damage: 0.00K
Reported by: Trained Spotter

A tree was reported down on I U Willets Road.

Thunderstorm Wind in NASSAU, NEW YORK
From 24-JUN-10 13:55:00 to 24-JUN-10 13:55:00 (EST-5)
Location: FLORAL PARK
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Trained Spotter

Large tree limbs were reported down.

Thunderstorm Wind in SUFFOLK, NEW YORK
From 24-JUN-10 13:57:00 to 24-JUN-10 13:57:00 (EST-5)
Location: BEIXEDON ESTATES
Magnitude: 61.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several large tree limbs were reported down on area roadways in the Town of Southhold.

Thunderstorm Wind in SUFFOLK, NEW YORK
From 24-JUN-10 14:10:00 to 24-JUN-10 14:10:00 (EST-5)
Location: WEST BABYLON
Magnitude: 52.00 EG
Property damage: 2.00K
Reported by: Other Federal Agency

Trees and wires were reported down at the intersection of Belmont and Sheffield Avenues in West Babylon.

Thunderstorm Wind in SUFFOLK, NEW YORK
From 24-JUN-10 14:21:00 to 24-JUN-10 14:21:00 (EST-5)
Location: BABYLON
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree limbs and power lines were reported down in West Islip, some blocking roadways.

Thunderstorm Wind in QUEENS, NEW YORK
From 24-JUN-10 13:39:00 to 24-JUN-10 13:39:00 (EST-5)
Location: CORONA
Magnitude: 54.00 MG
Reported by: ASOS

A gust of 54 knots was measured at LaGuardia Airport.

Thunderstorm Wind in SUFFOLK, NEW YORK
From 24-JUN-10 14:44:00 to 24-JUN-10 14:44:00 (EST-5)
Location: BABYLON
Magnitude: 70.00 EG
Property damage: 7.50K
Reported by: Law Enforcement

Numerous trees were reported down on roadways in West Islip.

Thunderstorm Wind in NASSAU, NEW YORK
From 24-JUN-10 13:45:00 to 24-JUN-10 13:45:00 (EST-5)
Location: KINGS PT
Magnitude: 64.00 MG
Reported by: Other Federal Agency

A gust of 74 mph was measured at the Kings Point NOAA/National Ocean Service Tide Gauge.

Thunderstorm Wind in NASSAU, NEW YORK
From 24-JUN-10 13:50:00 to 24-JUN-10 13:50:00 (EST-5)
Location: LAKE SUCCES
Magnitude: 52.00 EG
Property damage: 1.50K
Reported by: Trained Spotter

A tree was reported down on the Northern State Parkway near Lakeville Road/Exit 25.

Thunderstorm Wind in NASSAU, NEW YORK
From 24-JUN-10 13:50:00 to 24-JUN-10 13:50:00 (EST-5)
Location: KENSINGTON
Magnitude: 87.00 EG
Property damage: 200.00K
Reported by: NWS Storm Survey

Several dozen trees and power lines were reported down in Great Neck, with several trees uprooted. A NWS Storm Survey found an area of damage that extended over a broad area extending from Old Pond Road east to Hampshire Road, with downed trees facing south and east in those areas respectively in a fanned-out fashion indicative of a microburst. The most severe damage in this swath was concentrated along Old Pond and Strathmore Roads, with dozens of healthy hardwood and pine trees uprooted or snapped in two. This damage is indicative of maximum winds of 100 mph. The path length and maximum path width of the microburst were 0.75 miles. Some of the trees fell onto houses and cars.

Thunderstorm Wind in NASSAU, NEW YORK
From 24-JUN-10 14:02:00 to 24-JUN-10 14:02:00 (EST-5)
Location: NORTH MASSAPEQUA
Magnitude: 56.00 EG
Property damage: 4.00K
Reported by: Trained Spotter

Trees and wires were reported down in North Massapequa.

Hail in QUEENS, NEW YORK
From 24-JUN-10 13:44:00 to 24-JUN-10 13:44:00 (EST-5)
Location: FLUSHING ARPT
Magnitude: 1.75 
Property damage: 2.00K
Reported by: Trained Spotter

Hail of at least golf ball size fell on the Queens side of the Throgs Neck Bridge, with at least one car dented.

Thunderstorm Wind in NASSAU, NEW YORK
From 24-JUN-10 13:53:00 to 24-JUN-10 13:53:00 (EST-5)
Location: EAST HILLS
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Trained Spotter

A tree was reported down that covered 2 lanes of the westbound Long Island Expressway (I-495) Service Road (Store Hill Road) in the vicinity of Powells Lane.

Thunderstorm Wind in NASSAU, NEW YORK
From 24-JUN-10 14:00:00 to 24-JUN-10 14:02:00 (EST-5)
Location: NORTH WANTAGH
Magnitude: 61.00 EG
Property damage: 10.00K
Reported by: Broadcast Media

A large tree fell onto a house in Levittown.

Thunderstorm Wind in NASSAU, NEW YORK
From 24-JUN-10 13:55:00 to 24-JUN-10 13:55:00 (EST-5)
Location: ALBERTSON
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Public

Tree limbs were reported down along the Northern State Parkway between exits 26-31.

Thunderstorm Wind in NASSAU, NEW YORK
From 24-JUN-10 14:00:00 to 24-JUN-10 14:00:00 (EST-5)
Location: GARDEN CITY PARK
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Trained Spotter

Large tree limbs were reported down on Rockaway Avenue in Glenn Cove.

Thunderstorm Wind in NASSAU, NEW YORK
From 24-JUN-10 13:50:00 to 24-JUN-10 13:50:00 (EST-5)
Location: MANHASSET
Magnitude: 61.00 EG
Property damage: 15.00K
Reported by: Newspaper

Numerous trees were reported down across roads in Manhasset.

Thunderstorm Wind in NASSAU, NEW YORK
From 24-JUN-10 14:02:00 to 24-JUN-10 14:02:00 (EST-5)
Location: NORTH BELLMORE
Magnitude: 61.00 EG
Property damage: 15.00K
Reported by: Newspaper

Numerous trees were reported down in North Bellmore.

Thunderstorm Wind in NASSAU, NEW YORK
From 24-JUN-10 14:00:00 to 24-JUN-10 14:00:00 (EST-5)
Location: HICKSVILLE
Magnitude: 61.00 EG
Property damage: 20.00K
Reported by: Newspaper

Numerous trees were reported down in Hicksville, damaging at least one car.

Lightning in ORANGE, NEW YORK
From 24-JUN-10 12:10:00 to 24-JUN-10 12:10:00 (EST-5)
Location: HAMPTONBURG
Property damage: 5.00K
Reported by: Newspaper

Lightning struck trees in Hamptonburgh.

Thunderstorm Wind in ORANGE, NEW YORK
From 24-JUN-10 12:15:00 to 24-JUN-10 12:15:00 (EST-5)
Location: WASHINGTONVILLE
Magnitude: 52.00 EG
Property damage: 4.00K
Reported by: Newspaper

Trees were reported down in Washingtonville.

Hail in NASSAU, NEW YORK
From 24-JUN-10 13:54:00 to 24-JUN-10 13:54:00 (EST-5)
Location: MINEOLA
Magnitude: 1.00 
Reported by: Trained Spotter

Nickle to quarter size hail was reported in East Williston.

Hail in NASSAU, NEW YORK
From 24-JUN-10 13:55:00 to 24-JUN-10 13:55:00 (EST-5)
Location: ALBERTSON
Magnitude: 0.88 
Reported by: Trained Spotter

Nickle size hail was reported.

Thunderstorm Wind in ORANGE, NEW YORK
From 24-JUN-10 12:11:00 to 24-JUN-10 12:11:00 (EST-5)
Location: MIDDLETOWN
Magnitude: 70.00 EG
Property damage: 60.00K
Reported by: Law Enforcement

Many trees and wires were reported down throughout Middletown, causing multiple accidents.  One tree landed on a garage, causing it to collapse, resulting in one injury.  In addition, a piece of the roof of Middletown High School was blown off, protective tiles covering the football field were damaged, windows were blown out at some commercial buildings near the High School, and at least one tree fell on the roof of a car.

Hail in NASSAU, NEW YORK
From 24-JUN-10 14:05:00 to 24-JUN-10 14:05:00 (EST-5)
Location: NORTH MASSAPEQUA
Magnitude: 1.00 
Reported by: NWS Employee

Quarter size hail was reported on Hyman Drive in Farmingdale.

Thunderstorm Wind in SUFFOLK, NEW YORK
From 24-JUN-10 14:08:00 to 24-JUN-10 14:08:00 (EST-5)
Location: LINDENHURST
Magnitude: 52.00 EG
Property damage: 0.50K
Reported by: Law Enforcement

A large tree limb fell on a 7 year old boy in Lindenhurst, causing a head injury.

Thunderstorm Wind in BRONX, NEW YORK
From 24-JUN-10 13:42:00 to 24-JUN-10 13:42:00 (EST-5)
Location: THROGGS NECK
Magnitude: 61.00 EG
Property damage: 7.50K
Reported by: Public

Trees and tree limbs were reported down on the campus of SUNY Maritime.