Coastal Flood in New York, August 1 to 31, 2017

Name: Coastal Flood in New York, August 1 to 31, 2017
Start: 2017-08-01T00:00
End: 2017-08-31T23:59
Location: New York

August 1 to 31, 2017 · NWS BUF · 7 events in 7 counties and zones

Where it happened

Every event with a place to put it; 7 filed by county or forecast zone are drawn at its center, in a lighter ring. 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: 7

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 BUF wrote it up.

During the first six months of 2017, more than twice the normal amount of water accumulated on Lake Ontario while the Ottawa River saw the highest flows in more than 50 years, leading to widespread flooding across the Lake Ontario St. Lawrence River system. In early 2017, Lake Erie levels were the highest they’d been for that time of year for almost 20 years. Inflows to Lake Ontario from Lake Erie were above average from January through June. Lake Ontario saw two of the wettest months ever recorded in April and May of 2017. Water levels were impacted by precipitation falling directly onto the lake’s surface and by runoff. Variable ice conditions in the St. Lawrence River from January through March along with high Ottawa River flows limited outflow from Lake Ontario. The lake reached a record level of 248.95 feet.|Flooding began in early May and continued into early fall. Waves destroyed public and private breakwalls all along the lake shore. Thousands of homes and buildings were affected flood waters. Several homes dropped off bluffs. In some areas shoreline erosion of 50 to 100 feet deep occurred. Sanitary sewer systems in lakeside communities were affected. Beaches, marinas and state parks were closed all summer long with unknown economic losses to mainly seasonal businesses. In late May, the Governor imposed a 5 mph speed limit within 600 feet of the Lake Ontario and St. Lawrence River shore. The shoreline counties of Lake Ontario and the St. Lawrence River sustained enough damage to qualify for both a New York State and Federal Disaster Declaration. |By summer’s end, damage estimates included: $4 Million in Niagara County, $9 Million in Orleans County, $3 Million in Monroe County, $3 Million in Wayne County, $1 Million in Cayuga County, $23 Million in Oswego County and $10 Million in Jefferson 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 Buffalo, NY wrote its last area forecast discussion before the first event at Jul 31, 9:30 PM EST, 2 hours 30 minutes earlier.

Area forecast discussion, Jul 31, 9:30 PM EST, 2 hours 30 minutes before

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Hazardous weather outlook, Jul 31, 4:13 AM EST, 19 hours 47 minutes before

Hazardous Weather Outlook
National Weather Service Buffalo NY
513 AM EDT Mon Jul 31 2017

NYZ001>008-010>014-019>021-085-010915-
Niagara-Orleans-Monroe-Wayne-Northern Cayuga-Oswego-Jefferson-Lewis-
Northern Erie-Genesee-Wyoming-Livingston-Ontario-Chautauqua-
Cattaraugus-Allegany-Southern Erie-
513 AM EDT Mon Jul 31 2017

This Hazardous Weather Outlook is for western and north central New
York.

.DAY ONE...Today and Tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf

LEZ020-040-041-LOZ042>045-062>065-SLZ022-024-010915-
Upper Niagara River and Buffalo Harbor-
Lake Erie nearshore waters from Ripley to Dunkirk-
Lake Erie nearshore waters from Dunkirk to Buffalo-
Lake Ontario nearshore waters from the Niagara River to Hamlin Beach-
Lake Ontario nearshore waters from Hamlin Beach to Sodus Bay-
Lake Ontario nearshore waters from Sodus Bay to Mexico Bay-
Lake Ontario nearshore waters from Mexico Bay to the Saint Lawrence
River-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
Lake Ontario open waters from Sodus Bay to Mexico Bay-
Lake Ontario open waters from Mexico Bay to the Saint Lawrence River-
Saint Lawrence River from Cape Vincent to Ogdensburg-
Saint Lawrence River from Ogdensburg to Saint Regis-
513 AM EDT Mon Jul 31 2017

This Hazardous Weather Outlook is for portions of Lake Erie, Lake
Ontario and Saint Lawrence River.

.DAY ONE...Today and Tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf

In the hours before

Special weather statement, Jul 31, 6:31 PM EST, 5 hours 29 minutes before

Special Weather Statement
National Weather Service Buffalo NY
731 PM EDT MON JUL 31 2017

NYZ014-010000-
Ontario-
731 PM EDT MON JUL 31 2017

...STRONG THUNDERSTORMS WILL AFFECT PORTIONS OF ONTARIO COUNTY...

At 730 PM EDT, strong thunderstorms were located near Canandaigua,
moving southeast at 25 mph.

Winds in excess of 30 mph and pea size hail are possible with these
storms.

Locations impacted include...
Canandaigua, Bristol, Bloomfield, Rushville, Gorham, East Bloomfield,
Cheshire, Cottage City, Hall and Holcomb.

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 4290 7748 4296 7736 4284 7697 4276 7697
      4276 7731 4271 7735
TIME...MOT...LOC 2330Z 296DEG 20KT 4285 7729

RSH

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

7 coastal flood. Local standard time, as filed.

Coastal Flood, Niagara

When: August 1, 12:00 AM EST to August 31, 11:59 PM EST
Where: Niagara forecast zone
Reported by: River/Stream Gage
Coordinates: 43.173, -78.691 (the zone’s center; the record gives no point)

Coastal Flood, Orleans

When: August 1, 12:00 AM EST to August 31, 11:59 PM EST
Where: Orleans forecast zone
Reported by: River/Stream Gage
Coordinates: 43.251, -78.189 (the zone’s center; the record gives no point)

Coastal Flood, Monroe

When: August 1, 12:00 AM EST to August 31, 11:59 PM EST
Where: Monroe forecast zone
Reported by: River/Stream Gage
Coordinates: 43.165, -77.636 (the zone’s center; the record gives no point)

Coastal Flood, Wayne

When: August 1, 12:00 AM EST to August 31, 11:59 PM EST
Where: Wayne forecast zone
Reported by: River/Stream Gage
Coordinates: 43.066, -76.978 (the zone’s center; the record gives no point)

Coastal Flood, Northern Cayuga

When: August 1, 12:00 AM EST to August 31, 11:59 PM EST
Where: Northern Cayuga forecast zone
Reported by: River/Stream Gage
Coordinates: 43.010, -76.574 (the zone’s center; the record gives no point)

Coastal Flood, Oswego

When: August 1, 12:00 AM EST to August 31, 11:59 PM EST
Where: Oswego forecast zone
Reported by: River/Stream Gage
Coordinates: 43.464, -76.209 (the zone’s center; the record gives no point)

Coastal Flood, Jefferson

When: August 1, 12:00 AM EST to August 31, 11:59 PM EST
Where: Jefferson forecast zone
Reported by: River/Stream Gage
Coordinates: 43.999, -76.052 (the zone’s center; the record gives no point)

What these are

Coastal Flood: Flooding of coastal land by the sea, from storm surge, onshore wind or high tides.

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, August 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 2026-09-30. Each event’s entry at NCEI: 728357, 728359, 728360, 728361, 728362, 728363, 728364.