Flash Flooding and Hail in New York, July 17, 2017

Name: Flash Flooding and Hail in New York, July 17, 2017
Start: 2017-07-17T12:10
End: 2017-07-17T22:00
Location: New York

July 17, 2017 · NWS ALY · 19 events in 4 counties and zones

Where it happened

Every event with a place to put it. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 19

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.

What happened

The episode as NWS ALY wrote it up.

A slow-moving upper level trough brought several rounds of showers and thunderstorms to portions of eastern New York on July 17. Over 4,000 people lost power in Saratoga County due to strong winds and lightning. Road closures due to flash flooding also occurred in Saratoga County where two to four inches of rain occurred. Large hail was reported in Hamilton County.

What forecasters said that day

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 Jul 17, 11:50 AM EST, 20 minutes earlier.

Area forecast discussion, Jul 17, 11:50 AM EST, 20 minutes before

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Hazardous weather outlook, Jul 17, 3:15 AM EST, 8 hours 55 minutes before

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In the hours before

Special weather statement, Jul 17, 6:37 AM EST, 5 hours 33 minutes before

Special Weather Statement
National Weather Service Albany NY
737 AM EDT MON JUL 17 2017

NYZ032-033-171215-
Northern Herkimer-Hamilton-
737 AM EDT MON JUL 17 2017

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHWESTERN HAMILTON
AND NORTHEASTERN HERKIMER COUNTIES...

At 736 AM EDT, radar indicated strong thunderstorms were located
along a line extending from Cranberry Lake to 9 miles southeast of
Wanakena to 9 miles south of Limekiln Lake Campground to 9 miles
northeast of Ohio. Movement was northeast at 35 mph.

Wind gusts up to 50 mph and half inch hail are possible with these
storms.

These storms will be near...
  Limekiln Lake Campground around 750 AM EDT.
  Eighth Lake Campground around 800 AM EDT.
  Raquette Lake and Brown Tract Pond Campground around 805 AM EDT.
  Golden Beach Campground around 810 AM EDT.
  Blue Mountain Lake, Forked Lake Public Campground and Lake Durant
  Campground around 815 AM EDT.

Other locations impacted by these storms include Hasbroucks,
Nehasane, Russian Lake, Eagle Nest, Quaker Beach, Catlin Lake,
Deerland, Herkimer Landing, Caswell Lake and Sabattis.

Torrential rainfall is also occurring with these storms, 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 4397 7425 4392 7434 4390 7431 4373 7447
      4335 7497 4354 7479 4407 7487 4412 7428
TIME...MOT...LOC 1136Z 216DEG 30KT 4422 7486 4401 7483 4358 7477 4345
7489

TAW

Special weather statement, Jul 17, 8:52 AM EST, 3 hours 18 minutes before

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Special weather statement, Jul 17, 10:21 AM EST, 1 hour 49 minutes before

Special Weather Statement
National Weather Service Albany NY
1121 AM EDT MON JUL 17 2017

NYZ032-171600-
Northern Herkimer-
1121 AM EDT MON JUL 17 2017

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL HERKIMER COUNTY...

At 1120 AM EDT, a strong thunderstorm was located near Forestport, or
11 miles east of Boonville, moving northeast at 30 mph.

Winds in excess of 30 mph and pea size hail are possible with this
storm.

This storm will be near...
  McKeever around 1135 AM EDT.
  Nicks Lake Campground around 1150 AM EDT.
  Old Forge around 1155 AM EDT.
  Alger Island Public Campground and Eagle Bay around 1200 PM EDT.

Other locations impacted by this storm include Atwell, Wolf Lake
Landing, Minnehaha, Thendara, Mountain Lodge, North Wilmurt and First
Lake.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 4383 7482 4356 7479 4340 7508 4366 7512
TIME...MOT...LOC 1520Z 229DEG 25KT 4348 7511

DBT

Special weather statement, Jul 17, 11:04 AM EST, 1 hour 6 minutes before

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The radar

The Ft Drum radar (KTYX), 103 km away, was scanning. The volume nearest the first event began at 17:10 UTC.

Open the radar archive at this moment

Event by event

14 thunderstorm wind, 4 flash flood, 1 hail. Local standard time, as filed.

Hail, Hamilton

When: July 17, 12:10 PM EST
Where: Hamilton County, 5.88 mi NNW of Page Hill
Measured: 1 in hail
Reported by: Park/Forest Service
Coordinates: 43.600, -74.420

Quarter-size hail was reported.

Thunderstorm Wind, Hamilton

When: July 17, 12:10 PM EST
Where: Hamilton County, 5.88 mi NNW of Page Hill
Measured: 50 kt (58 mph) estimated gust
Reported by: Park/Forest Service
Coordinates: 43.600, -74.420

Trees were reported down at Mason Lake.

Thunderstorm Wind, Fulton

When: July 17, 1:42 PM EST
Where: Fulton County, 1.22 mi SE of Caroga Lake
Measured: 50 kt (58 mph) estimated gust
Reported by: 911 Call Center
Coordinates: 43.140, -74.480

A tree was downed by thunderstorm winds.

Thunderstorm Wind, Fulton

When: July 17, 2:16 PM EST
Where: Fulton County, 0.5 mi E of Sacandaga Park
Measured: 50 kt (58 mph) estimated gust
Reported by: 911 Call Center
Coordinates: 43.220, -74.170

A tree was downed, resulting in a power outage.

Thunderstorm Wind, Montgomery

When: July 17, 3:01 PM EST
Where: Montgomery County, 0.86 mi NW of Amsterdam
Measured: 50 kt (58 mph) estimated gust
Reported by: Public
Coordinates: 42.940, -74.190

Two trees were downed in Amsterdam due to thunderstorm winds.

Thunderstorm Wind, Saratoga

When: July 17, 3:19 PM EST
Where: Saratoga County, Charlton
Measured: 50 kt (58 mph) estimated gust
Reported by: 911 Call Center
Coordinates: 42.930, -73.970

Wires were downed due to thunderstorm winds.

Thunderstorm Wind, Saratoga

When: July 17, 3:30 PM EST
Where: Saratoga County, 1.47 mi SSW of East Galway
Measured: 50 kt (58 mph) estimated gust
Reported by: 911 Call Center
Coordinates: 43.050, -73.990

A tree was downed across Jockey Street due to thunderstorm winds.

Thunderstorm Wind, Saratoga

When: July 17, 3:31 PM EST
Where: Saratoga County, 0.86 mi NW of Ballston Center
Measured: 50 kt (58 mph) estimated gust
Reported by: 911 Call Center
Coordinates: 42.960, -73.860

A tree was downed due to thunderstorm winds.

Thunderstorm Wind, Saratoga

When: July 17, 3:32 PM EST
Where: Saratoga County, 1.47 mi SSE of Ballston Spa
Measured: 50 kt (58 mph) estimated gust
Reported by: Public
Coordinates: 42.980, -73.860

A tree was snapped off 20 feet above the ground.

Thunderstorm Wind, Saratoga

When: July 17, 3:33 PM EST
Where: Saratoga County, 1.47 mi NNW of East Line
Measured: 50 kt (58 mph) estimated gust
Reported by: 911 Call Center
Coordinates: 42.990, -73.830

Several reports of trees down across Eastline Road between Route 67 and East High Street.

Thunderstorm Wind, Saratoga

When: July 17, 3:33 PM EST
Where: Saratoga County, 2.52 mi E of Gansevoort
Measured: 50 kt (58 mph) estimated gust
Reported by: 911 Call Center
Coordinates: 43.200, -73.620

Wires down across Jewell Road near Kobor Road.

Thunderstorm Wind, Saratoga

When: July 17, 3:40 PM EST
Where: Saratoga County, 2.58 mi S of Kings Station
Measured: 50 kt (58 mph) estimated gust
Reported by: 911 Call Center
Coordinates: 43.113, -73.772

Trees and wires were downed across Daniels Road near Route 9.

Thunderstorm Wind, Saratoga

When: July 17, 3:44 PM EST
Where: Saratoga County, 2.32 mi SSE of Kings Station
Measured: 50 kt (58 mph) estimated gust
Reported by: 911 Call Center
Coordinates: 43.118, -73.755

Trees were reported down across Lewis Road and Jones Road, prompting a road closure.

Thunderstorm Wind, Saratoga

When: July 17, 3:51 PM EST
Where: Saratoga County, 0.51 mi E of Clifton Park Center
Measured: 50 kt (58 mph) estimated gust
Reported by: 911 Call Center
Coordinates: 42.850, -73.810

Trees were downed in Clifton Park due to thunderstorm winds.

Thunderstorm Wind, Saratoga

When: July 17, 3:55 PM EST
Where: Saratoga County, 3.15 mi W of Bacon Hill
Measured: 50 kt (58 mph) estimated gust
Reported by: 911 Call Center
Coordinates: 43.136, -73.682

A tree was downed on King Road due to thunderstorms.

Flash Flood, Saratoga

When: July 17, 5:30 PM EST to 10:00 PM EST
Where: Saratoga County, 0.8 mi NW of Round Lake
Cause: Heavy Rain
Reported by: 911 Call Center
Coordinates: 42.938, -73.791

Route 9 was closed between Round Lake and Wood Road due to flooding.

Flash Flood, Saratoga

When: July 17, 5:34 PM EST to 10:00 PM EST
Where: Saratoga County, 1.61 mi W of Round Lake to 1.65 mi W of Round Lake
Cause: Heavy Rain
Reported by: 911 Call Center
Coordinates: 42.931, -73.812

Flooding reported in the roadway with flood waters entering residences.

Flash Flood, Saratoga

When: July 17, 5:35 PM EST to 10:00 PM EST
Where: Saratoga County, 0.92 mi ESE of Round Lake Arpt to 0.93 mi NE of Coons
Cause: Heavy Rain
Reported by: 911 Call Center
Coordinates: 42.925, -73.753

Route 67 was closed between Farley Road and Sawmill Hill Road due to flooding.

Flash Flood, Saratoga

When: July 17, 5:35 PM EST to 10:00 PM EST
Where: Saratoga County, 0.69 mi N of Round Lake Arpt to 0.63 mi N of Round Lake Arpt
Cause: Heavy Rain
Reported by: 911 Call Center
Coordinates: 42.940, -73.770

A road was closed due to flooding.

What these are

Hail: Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
Thunderstorm Wind: Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
Flash Flood: Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in New York in 2017 Every state in 2017 This day in weather history Warnings in New York, July 2017

Sources

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 2026-10-01. Each event’s entry at NCEI: 711592, 711614, 711593, 711594, 711595, 711596, 711611, 711597, 711598, 711602, 711603, 711604, 711605, 711609, 711610, 711591, 711587, 711588, 711590.