Irma, now a tropical storm, is pushing through north Florida into Georgia and South Carolina with destructive impacts, including wind damage, storm surge, heavy rain and possible tornadoes. The following maps and webcams show the current conditions for Irma.
Over the following 30 hours Irma intensified into a major hurricane with highest sustained winds of 115 MPH, a category-3 storm on the Saffir-Simpson Hurricane Wind Scale. Such rapid strengthening is unusual for storms in the far eastern Atlantic.
Resilient Irma made a final attempt to re-intensify while crossing the open waters of the Florida Straits. The storm quickly reached category-4 intensity with 130 MPH winds early in the morning of September 10th, while approaching the vulnerable Florida Keys.
KEY MESSAGES: 1. Irma is a potentially catastrophic category 5 hurricane and will bring life-threatening wind, storm surge, and rainfall hazards to portions of the northern Leeward Islands, including the Virgin Islands and Puerto Rico today.
Leading up the storm, Google will display a crisis notification card if you are in or near an affected area. You'll see a hurricane forecast cone that shows the predicted trajectory of the storm, accompanied by information of when it is likely to hit.
Irma wrought catastrophe in Barbuda and parts of the U.S. and the British Virgin Islands. Puerto Rico, the Dominican Republic, and Haiti each experienced flooding and heavy damage in some areas, but the storm left much less destruction than expected. Hurricane Irma downgraded to a Category 4 Sept.
Hurricanes are tracked in several ways: Via satellite, reconnaissance aircraft and balloons that collect data including temperature, humidity and wind speed. Those various data streams are then compiled to create computer-forecast models that attempt to predict the path and intensity of the storm.
Public advisories for Atlantic tropical cyclones are normally issued every six hours at 5:00 AM EDT, 11:00 AM EDT, 5:00 PM EDT, and 11:00 PM EDT (or 4:00 AM EST, 10:00 AM EST, 4:00 PM EST, and 10:00 PM EST).
The wind field increased in size and winds wavered between 80 mph and 220 mph. At approximately 1 p.m. EST, the hurricane made landfall in Cudjoe Key, Florida. Irma eventually weakened to a Category 3 later in the day as the hurricane made landfall in Marco Island, Florida, with winds topping at 115 mph.
It was estimated that the cyclone caused at least $50 billion in damage, making Irma the costliest hurricane in Florida history, surpassing Hurricane Andrew.
By late Friday night into Saturday, Larry will slam into the Avalon Peninsula of Newfoundland, bringing hurricane-force winds to the coastline and perhaps some storm surge.
In tracking the development of storm systems, a meteorologist relies on two essential observational tools: satellite imagery and weather radar. Satellite images reveal the formation of storm fronts over broad areas: the whole state, several states, entire nations.
GalvestonUnited StatesRankHurricaneSeason1"Galveston"19002"San Ciriaco"18993Maria20174"Okeechobee"19287 more rows
Whenever a tropical cyclone (a tropical depression, tropical storm, or hurricane) or a subtropical storm has formed in the Atlantic or eastern North Pacific, the NOAA National Hurricane Center (NHC) issues tropical cyclone advisory products at least every 6 hours at 5 am, 11 am, 5 pm, and 11 pm EDT.
This product is updated at approximately 2 AM, 8 AM, 2 PM, and 8 PM EDT from May 15 to November 30, with special outlooks issued at any time as conditions warrant. The graphic displays all currently active tropical cyclones, and disturbances with tropical cyclone formation potential over the next five days.
Major HurricaneM: Major Hurricane – wind speed greater than 110 MPH.
A Hurricane Watch means that hurricane conditions are possible within the watch area. A watch is typically issued 48 hours before the anticipated first occurrence of tropical-storm-force winds, conditions that make outside preparations difficult or dangerous.
A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area. Interests elsewhere in the Dominican Republic and Haiti, as well as Cuba, the northwestern Bahamas, and Florida should monitor the progress of Irma.
An unofficial observation on Buck Island in the U.S. Virgin Islands has recently reported sutained winds of 106 mph (171 km/h) with a gust to 131 mph (211 km/h). Hurricane-force winds extend outward up to 50 miles (85 km) from the center and tropical-storm-force winds extend outward up to 185 miles (295 km).
2. A hurricane warning is in effect for the northern coast of the Dominican Republic, the southeastern Bahamas, the Turks and Caicos, and portions of Hai ti, with a hurricane watch in effect for the central Bahamas and much of Cuba.
British and U.S. Virgin Islands except St. Croix...7 to 11 ft Northern coast of Puerto Rico...4 to 6 ft Southern coast of Puerto Rico and St. Croix...2 to 4 ft The deepest water will occur along the immediate coast in areas of onshore winds, where the surge will be accompanied by large and destructive waves.
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NGO Batisseurs Solidaires members rebuild a house destroyed by the hurricane Irma, in Quartier d'Orleans on February 28, 2018, on the French overseas island of Saint-Martin six months after the passing of Hurricanes Irma and Maria in September. (Lionel Chamoiseau/AFP/Getty Images)
Hurricane Irma was a classic Cape Verde hurricane that will long be remembered for its severity and wide-ranging impacts to several islands in the Caribbean Sea and Florida. 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 27th, near the peak of the Atlantic hurricane season (Fig. 1). Such disturbances move off the African coast every few days during August and September, however, most of them fail to develop into tropical cyclones. This can be due to a number of factors, including blasts of dry, stable air from the Saharan desert, strong upper-level westerly winds, or a lack of the necessary atmospheric “spin” needed to generate a counterclockwise circulation.
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.
White lines with arrows indicate direction of steering, image indicates forward speed. Note Irma’s location over the north coast of Cuba, between the Bermuda ridge to the east and a ridge over the western Gulf of Mexico. The mid-upper trough between these ridges steered Irma to the northwest, then north.
In addition to the long periods of heavy rain and strong winds, storm surge flooding also occurred well away from the storm center, including the Jacksonville area, where strong and persistent onshore winds had been occurring for days before Irma’s center made its closest approach.