Upper Air Sounding, Forecasts American Meteorological Society. This interaction with land disrupted Irma’s structure a bit, as a hurricane requires plenty of deep warm water beneath the storm’s center to maintain the extremely low pressure and strong winds. "Hurricane Irma’s Staggering Power in Numbers." Satellite Images Coldest clouds are shown in white, warmest surface temperatures in blue. Hurricane Irma gained Category 5 status on Sept. 5. Seven of the past 10 summers have been above normal., Warmer air holds more moisture, leading to greater build-up leading up to a storm. Aviation Weather Here are the five most economically devastating hurricanes in U.S. history. Category 1 hurricanes have maximum sustained winds of … Florida Panhandle (EVX) National Hurricane Center. "Climate Summary for Florida—August 2017." National Weather Service It undulates north and south as it goes, driven by temperature contrasts between the Arctic and temperate zones. American Red Cross. National Oceanic and Atmospheric Administration They were the most powerful winds ever recorded in that part of the Caribbean. As of Tuesday morning, Irma is a Category 5 hurricane and one of … Kimberly Amadeo is an expert on U.S. and world economies and investing, with over 20 years of experience in economic analysis and business strategy. First, rising sea levels worsened storm surges and flooding. Irma’s intensity remained fairly steady for the next few days while moving into a region with drier air aloft (Fig. Additionally, dry air associated with this trough was beginning to disrupt Irma’s inner core. The potential shortage pushed orange juice futures and sugar prices higher in the days leading up to the storm. Observations (Map) Like many of the most notorious Atlantic hurricanes, Irma began as a weak wave of low pressure accompanied by disorganized showers and thunderstorms which emerged off the west African coast on August 27, Tropical Storm Irma formed in the far eastern Atlantic Ocean, just west of the Cape Verde Islands, on the morning of August 30, As Irma began to approach the northern Leeward Islands on September 4, The storm finally “weakened” to a category-4 hurricane on September 8, For many days Irma had been steered steadily westward across the tropical Atlantic and Caribbean islands by a strong ridge in the mid to upper atmosphere (10k to 30k ft AGL) to Irma’s north. If Irma had hit Georgia and the Carolinas hard enough, it would have affected corn, soybeans, cotton, and peanut prices. National Hurricane Center Tropical Cyclone Report. Hurricane Harvey Shows How Climate Change Can Impact the Economy, Why Floods Are a More Dangerous Threat Than Terrorism, The Effects of Each Additional Degree of Global Warming. Hurricane Irma pummeled parts of Florida with ferocious winds and heavy bands of rain as the eye of the storm climbed north up the coast packing a punch. A slightly more western track could also have allowed for a brief period of onshore winds in Apalachee Bay, increasing the risk for storm surge. As Irma hit Florida, tropical storm force winds extended outward up to 400 miles from the center, and hurricane force winds extended up to 80 miles. Hurricane Irma is now a Category 4 storm, currently in the Caribbean and heading north to Florida. Irma held 7 trillion watts of energy. National Outlook Hurricane Irma made landfall in the Florida Keys on Sunday morning as a Category 4 storm and battered Florida into Monday morning. Irma's death toll included 129 people in Florida, Georgia, and North Carolina. 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