![]() ![]() NOAA says storm surge is often the greatest threat to life and property, accounting for nearly half of the deaths of a landfalling tropical cyclone.Īgencies estimate more than 22 million people along the Gulf and East coasts are vulnerable to storm surge, with areas along shallow coastlines most at risk. The alerts take into account the forecast track, intensity, size of the tropical cyclone, land elevation and astronomical tide levels. A watch is upgraded to a Storm Surge Warning when life-threatening conditions occur within 36 hours. The surge model combines historical and hypothetical information with data from the National Hurricane Center on the current storm to produce probabilistic products.įorecasters then are tasked with determining the likelihood of the severity of the upcoming event and relay the risks to the public.Ī relatively new graphical alert product debuted in 2017 to warn coastal residents of the threat of water rise and uses watches and warnings in the potentially impacted area.Ī Storm Surge Watch means areas under the alert may experience life-threatening water inundation within 48 hours. The graphics below show the storm total rainfall for Barry. Below is the track of this cyclone, constructed from data provided by the National Hurricane Center.
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