Weather Forecast Office Presentation Created

10/11/2019 7:50 AMFollow us on Twitter Follow us on Facebook

Wind Advisories for New London County,

and Suffolk County have been cancelled.

Storm Warnings for the Ocean nearshore

waters have been discontinued, and have

been converted over to Gale Warnings.

Coastal Flood Warning is now in effect for

Tonight’s high tide cycle for Southern

Nassau and SW Suffolk.

Coastal Flood Advisories have been

extended through this evening for NJ / NY

Harbor, Southern Queens, Southern

Brooklyn, and Eastern Long Island.

Offshore Storm Briefing

What Has Changed?

Decision Support Briefing #6

As of: 6 AM Oct 11, 2019

New York, NY

Current Hazards

Weather Forecast Office Presentation Created

10/11/2019 7:50 AMFollow us on Twitter Follow us on Facebook

Main Points

Hazard Impacts Location Timing

Coastal

Impacts

Marine

• Minor to moderate coastal

flooding.

• Inundation of 1 to 2 ft, with 2

to 3 ft across the back bays of

southern Nassau and SW

Suffolk.

• Areas of dune erosion and

localized overwashes

• Gale conditions. Seas of 9 to

15 ft on the Ocean.

• Vulnerable coastal locales

along NY/NJ Harbor, all of

LI, and SW CT.

• Greatest threat for

moderate impacts will be S

bays of LI.

• Localized moderate

impacts are possible

across the E bays of LI and

the North Fork.

Nearshore Ocean Waters

Times of high tide through

tonight

Through 2 AM Saturday

Through Today

New York, NY

Nearshore Non-Ocean

Waters• Gale conditions. Seas of 2 to

5 ft on LI Sound.

Marine

Weather Forecast Office Presentation Created

10/11/2019 7:50 AMFollow us on Twitter Follow us on Facebook

None Limited Elevated Significant Extreme

Summary of Greatest Impacts

Coastal Impacts: South shore back bays of

southern Nassau and SW Suffolk

New York, NY

None Limited Elevated Significant Extreme

Coastal Impacts: Vulnerable locales along NY/NJ,

LI , and SW CT.

None Limited Elevated Significant Extreme

Marine: Nearshore Waters

Weather Forecast Office Presentation Created

10/11/2019 7:50 AMFollow us on Twitter Follow us on Facebook New York, NY

Marine / Coastal Hazards

Coastal Flood Hazards and Impacts: Moderate coastal flooding along the southern bays

of LI. Inundation of 2 to locally 3 ft above ground in

the most vulnerable locales.

Minor coastal flooding (inundation 1/2 to 1 ½ ft

above ground) in the most vulnerable coastal locales

of the advisory areas. Localized moderate flooding is

possible across eastern LI bays.

Several waterfront road closures expected with

minor damage to coastal properties possible.

Shoreline Hazards and Impacts: 5-9’ breaking waves along the oceanfront, 3 to 6’

along the twin forks, 3 to 5’ along northern LI

shoreline, 2 to 3’ along the north facing shoreline of

the bays.

Areas of Dune Erosion and localized overwashes

along the Atlantic ocean, Orient Point, and north

shore of LI shorefronts during times of high tide.

Minor to locally Moderate damage to shoreline/dune

structures possible

Timing: During times of high tide through tonight.

Additional minor to localized moderate flooding is

possible on Saturday, mainly across the south shore

back bays of Long Island

Coastal Flooding- Coastal Flood Warnings and Advisories in Effect

Please go to the NWS New York, NY Coastal Flooding Page for the latest coastal flood forecast and the tools to visualize the coastal impacts.https://www.weather.gov/okx/coastalflood

Weather Forecast Office Presentation Created

10/11/2019 7:50 AMFollow us on Twitter Follow us on Facebook New York, NY

Greatest threat areas for Widespread Minor to Moderate inundation through Friday night

high tides. (This inundation mapping product is experimental)

Coastal Flooding – Likely Inundation Areas

Please go to the NWS New York, NY Coastal Flooding Page for the latest coastal flood forecast and the tools to visualize the coastal impacts.https://www.weather.gov/okx/coastalflood

Weather Forecast Office Presentation Created

10/11/2019 7:50 AMFollow us on Twitter Follow us on Facebook New York, NY

Areas with potential for minor to locally moderate through Friday night high tide cycles.

(This inundation mapping product is experimental)

Coastal Flooding – Potential Inundation Areas

Please go to the NWS New York, NY Coastal Flooding Page for the latest coastal flood forecast and the tools to visualize the coastal impacts.https://www.weather.gov/okx/coastalflood

Weather Forecast Office Presentation Created

10/11/2019 7:50 AMFollow us on Twitter Follow us on Facebook New York, NY

Coastal Flooding Defintions

Weather Forecast Office Presentation Created

10/11/2019 7:50 AMFollow us on Twitter Follow us on Facebook

Event Summary

Widespread minor to moderate coastal flood and shoreline impacts

through tonight.

Highest threat for moderate coastal impacts is along vulnerable

coastal locales along the southern bays of Nassau and SW Suffolk.

Gale conditions on the non-ocean nearshore waters through Today and

Gale conditions on the ocean nearshore waters through 2 am Saturday.

Seas of 9-15 ft on the ocean and 2 to 5 ft on LI Sound.

New York, NY