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Weather Forecast Office Presentation Created
10/9/2019 5:32 PMFollow us on Twitter Follow us on Facebook
Coastal Flood Warnings and Advisories in
Effect for Thursday high tides
Wind Advisory in effect for Eastern LI and
SE CT Thu AM into Fri AM
Storm and Gale Warnings in Effect thru
Fri
Offshore Storm Briefing
What Has Changed?
Decision Support Briefing #3
As of: 5 PM Oct 09, 2019
New York, NY
Current Hazards
Weather Forecast Office Presentation Created
10/9/2019 5:32 PMFollow us on Twitter Follow us on Facebook
Main Points
Hazard Impacts Location Timing
Coastal
Impacts
Strong
Winds
Flooding
Marine
• Minor to Moderate coastal
flooding.
• Inundation of 1 to 2 ft, locally
2 to 3 ft, in vulnerable areas,
• Areas of Dune Erosion and
localized Overwashes
• 20 to 35 MPH with gusts to 50
mph.
• Several Downed Trees and
tree limbs.
• Scattered Power Outages
• Additional 1 to 2 inches.
• Minor Flooding of Poor
Drainage Areas.
• Gale to Storm Conditions.
Seas of 10 to 18 ft on the
Ocean and 4 to 7 ft on LI
Sound.
• Vulnerable coastal
locales along NY/NJ
Harbor, all of LI, and
SW CT.
• Greatest threat for
moderate impacts will
be S and E bays of LI
and the north shore of
LI.
E LI, and SE CT
E LI, and SE CT
Nearshore Waters
Times of High tide Thu Pm
through Friday PM
Thursday
Tonight through Thursday
Through Friday
New York, NY
Weather Forecast Office Presentation Created
10/9/2019 5:32 PMFollow us on Twitter Follow us on Facebook
None Limited Elevated Significant Extreme
Summary of Greatest Impacts
None Limited Elevated Significant Extreme
None Limited Elevated Significant Extreme
None Limited Elevated Significant Extreme
Coastal Impacts: Vulnerable locales along NY/NJ,
all of LI , and SW CT.
Strong Winds: E LI, and SE CT
Flooding: E LI, and SE CT
Marine: Nearshore Waters
New York, NY
Weather Forecast Office Presentation Created
10/9/2019 5:32 PMFollow us on Twitter Follow us on Facebook New York, NY
Marine / Coastal Hazards Coastal Flood Hazards and Impacts: Moderate coastal flooding along the southern
and eastern bays of LI, low-lying north shore of
LI locations, and barrier beaches 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.
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 Thursday Evening
through Friday Evening.
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
10/9/2019 5:32 PMFollow us on Twitter Follow us on Facebook New York, NY
Greatest threat areas for Widespread Minor to Moderate inundation during Thursday Night
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
10/9/2019 5:32 PMFollow us on Twitter Follow us on Facebook New York, NY
Areas with potential for minor to locally moderate inundation during Thursday Night
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
10/9/2019 5:32 PMFollow us on Twitter Follow us on Facebook New York, NY
Areas with potential for minor to locally moderate inundation during Thursday Night
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
10/9/2019 5:32 PMFollow us on Twitter Follow us on Facebook New York, NY
Coastal Flooding Defintions
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10/9/2019 5:32 PMFollow us on Twitter Follow us on Facebook
Strong Winds – Wind Advisory in Effect
Peak Wind Gust Image
New York, NY
Hazards: Northeast winds of 20 to 35
mph with gusts to 50 mph,
across E LI and extreme SE
CT.
Impacts: Several downed trees and tree
limbs
Scattered power outages
Dangerous travel conditions for
high profile vehicles
Timing: Strongest winds from 6am Thu
through 6am Fri
Weather Forecast Office Presentation Created
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Wind Advisory … from 6am Thu till 6am Fri
Wind Related Hazards
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Heavy Rain
New York, NY
Hazards: Additional rainfall of 1 to 2 inches across
Eastern Long Island.
Rainfall rates of less than 1”/hr
Additional rainfall of ¼ to 1 inch across
western portions of the Tri-State
including NYC/NJ metro.
Impacts: Minor Flooding of poor drainage and
Low-lying Roads.
Timing: Heaviest rain from late Tonight through
Thursday afternoon.
Uncertainty: Swaths of locally heavier rainfall
possible.
Weather Forecast Office Presentation Created
10/9/2019 5:32 PMFollow us on Twitter Follow us on Facebook
Event Summary
Widespread Minor to Moderate coastal flood and shoreline impacts
Thursday Evening through Friday Evening
Highest threat for Moderate coastal impacts is along vulnerable
coastal locales along the southern and eastern bays of LI and north
shore of LI.
Strong Winds across E LI and extreme SE CT Thursday morning into
Friday morning
Storm conditions on the ocean waters and Gale conditions on
remainder of nearshore waters thru Friday
Seas of 12-18 ft on the ocean and 4 to 7 ft on LI Sound.
New York, NY