10C.5 Damaging Waves in Nova Scotia with Post-tropical Storm Noel – Data and Models

Wednesday, 30 April 2008: 11:15 AM
Palms H (Wyndham Orlando Resort)
Doug Mercer, Environment Canada, Dartmouth, NS, Canada; and P. Bowyer, B. Thomas, and A. W. MacAfee

On November 3-4, 2007, Atlantic Canada was hit by Post-tropical Storm Noel. An enormous wind field, including hurricane-force winds, developed quickly after Noel exited the Bahamas on its way to Atlantic Canada. The straight-line track and favourable translation speed of the storm afforded opportunity for large trapped-fetch waves to develop. These waves, combined both with the exacerbating role of the surge and the mitigative role of the tidal cycle, resulted in some instrument records being established and widespread coastal damage in Nova Scotia. The Canadian Hurricane Centre (CHC) served 48-hr notice of the approaching high waves and 36-hr notice of the specific wave heights and impacts to be expected. This presentation will examine the wave data and the models used in the preparation of the CHC forecasts. A subsequent companion presentation will examine the CHC messaging leading up to the event as well as coastal and community impacts. Both presentations will include recommendations.
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