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Hurricane Irma was moving up Cuba's northern coast when NASA's Aqua satellite passed overhead. A satellite instrument revealed coldest temperatures of powerful thunderstorm tops surrounding Irma's eye and in a band of thunderstorms over the Florida Keys.
Infrared MODIS data showed two areas with very cold cloud top temperatures of strong thunderstorms. They were around center of circulation and in a band of thunderstorms north of the center, where temperatures were as cold as minus 80 degrees Fahrenheit (minus 62.2 Celsius). Temperatures that cold indicate strong uplift in the storm and cloud tops high into the troposphere. NASA research has shown that storms with cloud tops that cold have the ability to generate heavy rain.
EDT - National - Hurricane - Center - Warnings
At 11 a.m. EDT the National Hurricane Center noted many warnings and watches in effect.
A Storm Surge Warning is in effect for Volusia/Brevard County line southward around the Florida peninsula to the Suwanee River, the Florida Keys and Tampa Bay. A Storm Surge Watch is in effect from north of the Volusia/Brevard County line to the Isle of Palms, South Carolina, and north of the Suwanee River to Ochlockonee River.
Hurricane - Warning - Effect - Fernandina - Beach
A Hurricane Warning is in effect for Fernandina Beach southward around the Florida peninsula to the Aucilla River, the Florida Keys, Lake Okeechobee, Florida Bay. A Hurricane Warning is also in effect for the Cuban provinces of Camaguey, Ciego de Avila, Sancti Spiritus, Villa Clara, Matanzas, and Havana, Andros Island, Bimini and Grand Bahama. A Hurricane Watch is in effect from north of Fernandina Beach to Edisto Beach, west of the...
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