Get Full Government Meeting Transcripts, Videos, & Alerts Forever!
Nantucket tide-gauge data show accelerating high‑tide flooding, presenter tells advisory committee
Summary
Town staff and consultants told the Coastal Resilience Advisory Committee that 60 years of NOAA-validated tide‑gauge records show a nonlinear increase in days exceeding local nuisance-flood thresholds; committee members discussed implications for road closures and planning.
Chuck Larson, the Town of Nantucket manager of strategic projects, told the Coastal Resilience Advisory Committee on March 25, 2025 that a 60‑year tide‑gauge record for the island shows an accelerating increase in days that exceed local nuisance‑flood thresholds.
Larson presented statistical analysis of daily higher‑high‑water values from the Nantucket tide gauge, showing roughly 0.82 feet (about 10 inches) of local mean sea‑level rise over 60 years and a rapid, nonlinear increase in the frequency of high‑tide exceedances at lower thresholds used to mark nuisance flooding. "The theme is really with 60 years of data, what can the past tell us about the future?" Larson said.
The study separates the record into 19‑year ‘‘epics’’ and compares frequency histograms and…
Already have an account? Log in
Subscribe to keep reading
Unlock the rest of this article — and every article on Citizen Portal.
- Unlimited articles
- AI-powered breakdowns of topics, speakers, decisions, and budgets
- Instant alerts when your location has a new meeting
- Follow topics and more locations
- 1,000 AI Insights / month, plus AI Chat
