Irma Weakening As It Moves Over The Western Florida Peninsula

September 11, 2017 1am Advisory

Hurricane Irma:

  • Location: 28.2 N   82.2 W
  • About 20 mi NW of Lakeland, FL
  • About 25 mi NE of Tampa, FL
  • Maximum Sustained Winds: 85 mph
  • Present Movement: NNW or 345 degrees at 15 mph
  • Minimum Central Pressure: 960 mb / 28.35 inches of mercury

At 1:00 AM CDT, the center of Hurricane Irma was located by NOAA Doppler radar and surface observations near latitude 28.2 North, longitude 82.2 West.  Irma is moving toward the north-northwest near 15 mph.  A turn toward the northwest at afaster forward speed is expected during the next day or so.  On the forecast track, the center of Irma will continue to move over the western Florida peninsula through this morning and then into the southeastern United States late today and Tuesday.

Maximum sustained winds have decreased to near 85 mph with higher gusts. Additional weakening is forecast, and Irma is expected to become a tropical storm over far northern Florida or southern Georgia later today.

Irma has a very large wind field. Hurricane-force winds extend outward up to 80 miles from the center, and tropical-storm-force winds extend outward up to 415 miles.  The National Ocean Service station at the Clearwater Beach Pier recently reported a wind gust of 88 mph (142 km/h), and wind gusts of hurricane force have been recently reported at the Orlando International and the Orlando Executive airports.

The minimum central pressure estimated from surface observations is 960 mb (28.35 inches of mercury).  Lakeland Regional Airport recently reported a pressure of 963.4 mb (28.45 inches of mercury) as the center passed just to the west.

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

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