FloodZoneMap.org

Lakeshore Flood — Jefferson, NY

Nov 1, 2019

A deepening area of consolidated low pressure tracked from the north shoreline of Lake Erie to Toronto, and then along the northern shoreline of Lake Ontario Thursday evening, October 31st. This system brought recorded breaking Halloween rains to our region, damaging wind gusts, a large Lake Erie seiche, a smaller Lake Ontario seiche, and river flooding in the North Country (Cayuga, Black and Moose River). Southwest winds increased dramatically on Halloween evening following a cold frontal passa

Source: NOAA National Weather Service Storm Events Database (event 866878). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Jefferson, NY

This event is one of many recorded floods in Jefferson County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.

View Jefferson County flood data →

More Flood Stories

Flood1 death$250K damage

Jefferson, NY · Apr 28, 2011

After near record-setting spring rainfall, a warm front brought two to four inches of rain to the eastern Lake Ontario Region. The runoff resulted in flooding across the Black River basin, including the Black River and some of its major tributaries.

Read the full account →
Flood$1.5M damage

Jefferson, NY · Jun 1, 2019

Excessive runoff into the Ottawa River Basin in Canada restricted the outlet of Lake Ontario. This combined with above normal precipitation into the Lake Ontario Basin, record levels on the Great Lakes above Lake Ontario, and higher than normal flows into the lake from the…

Read the full account →
Flood$1.0M damage

Jefferson, NY · Jul 1, 2019

Excessive runoff into the Ottawa River Basin in Canada restricted the outlet of Lake Ontario. This combined with above normal precipitation into the Lake Ontario Basin, record levels on the Great Lakes above Lake Ontario, and higher than normal flows into the lake from the…

Read the full account →
Flood$500K damage

Jefferson, NY · May 17, 2019

Excessive runoff into the Ottawa River Basin in Canada restricted the outlet of Lake Ontario. This combined with above normal precipitation into the Lake Ontario Basin, record levels on the Great Lakes above Lake Ontario, and higher than normal flows into the lake from the…

Read the full account →