September 10, 2017 8am Advisory

Hurricane Irma

  • Location: 24.6 N 81.5W
  • About  20 mi ESE of Key West, FL
  • About  110 mi S of Naples, FL
  • Maximum Sustained Winds: 130 mph
  • Present Movement: NNW or 330 degrees at 8 mph
  • Minimum Central Pressure: 929 mb / 27.43 inches of mercury

A Tropical Storm Warning is in effect for…

  • West of Indian Pass to the Okaloosa/Walton County Line
  • North of Fernandina Beach to South Santee River

At 8 am CDT, the center of Hurricane Irma was located near latitude 24.6 North, longitude 81.5 West. Irma is moving toward the north-northwest near 8 mph (13 km/h), and an increase in forward speed is expected later today, with that motion continuing through Monday.  On the forecast track, the eye of Irma should move over the Lower Florida Keys shortly, and then move near or over the west coast of the Florida Peninsula later today through tonight. Irma should then move inland over northern Florida and southwestern Georgia Monday afternoon.

Maximum sustained winds are near 130 mph (215 km/h) with higher gusts.  Irma is a category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale.  While weakening is forecast, Irma is expected to remain a powerful hurricane while it moves through the Florida Keys and near the west coast of Florida.

Hurricane-force winds extend outward up to 80 miles (130 km) from the center and tropical-storm-force winds extend outward up to 220 miles (350 km).  A wind gust to 89 mph (143 km/h) was recently measured at the Key West National Weather Service Forecast Office.

Sustained winds of 46 mph (74 km/h) with a gust to 72 mph (117 km/h) was recently reported at Tamiami Airport in West Kendall, Florida.

The estimated minimum central pressure is 929 mb (27.43 inches).

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