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Louise Fode and Aimee Fish, NWS Alaska Region
LEO Webinar: January 20, 2015
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Overview
Storm Surge Projects (Nationwide)
Alaska Projects
Observation Network and how LEO
plays a role
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NWS Storm Surge Project
Most damage from hurricanes comes from storm surge Gulf Coast emergency
managers wanted a separate storm surge warning
Hurricane Irene and Hurricane Sandy “coastal flooding” vs.
“storm surge”?
Hurricanes Extra-tropical storms??
Hurricane Irene, 2011
What do Communities Need?
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Storm Surge Forecasting Components
Storm Surge/
Coastal Flood
Forecast
Storm Surge/
Coastal Flood
Warning
Water Level
Observations
Tide Data and
Forecasts
Computer
Models
Topography
Bathymetry
(Surveying)
Flooding Maps
What can we provide for Alaskans?
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Coastal Storm Disasters
20 3 3
1 State Disaster Declarations*
Coastal Storms
1978-2013
*Declarations often consist of multiple storms
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Coastal Storm Disasters
13
9
8
State Disaster Declarations
Coastal Storms
1978-2013
Typical Season: August – November with exceptions
2003-2013
6 Declarations,
4 Presidential
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Coastal Storm Vulnerabilities
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Components of the Flood
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Forecast Tools
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Forecast Tools
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Communication Challenges
Timing: Complex coastline, multiple
storms
Water levels: Without tidal information,
we can only talk about surge (only part
of the impact)
Need: Will critical infrastructure be
impacted?
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Communication Challenges
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Communication Challenges
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Communication Tool Pilot
Color coding
elevation above
MLLW or MSL
5 pilot
communities
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Communication Tool Pilot
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Communication Tool Pilot
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Communication Tool Pilot
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Communication Tool Pilot
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Communication Tool Pilot
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Communication Tool Pilot
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Communication Tool Pilot
Also allow for feedback
A way to explain to forecasters where,
and how high, the water went
Forecasters can improve forecasts and
warnings for the next storm
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Alaska Observation Network
Water level observations
Current water levels
Tide predictions
Wave buoys
Expanding observation network
National Oceanographic Service (NOS)
Alaska State Division of Geological Geophysical Surveys (DGGS)
Water Level Observations, Jan 2015
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What do we need to know?
How high did the water
get during the storm?
What was affected? Homes?
Infrastructure (i.e. power
plant, sewage lagoons)?
Did the forecast match
what happened? If not – how was it
different?
Any unusual events
(i.e. changes in tides)
Flooding in Nome, 2004 (SEOC)
Flooding in Golovin, 2005 (SEOC)
A picture is worth
1,000 words! Toby Anungazuk Jr. (LEO) Golovin: Nov. ‘11
Elmer Bekaolok, Shaktoolik: Nov. 2011
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In Conclusion
National Storm Surge project is looking
at community needs
Alaska NWS and DGGS are developing
communication tools
NWS is expanding the observation
network
LEO can help provide valuable data
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Questions?