NHC 11:00 Update:
Irma's center has moved northward across the western Florida peninsula since it made landfall earlier this afternoon, and it is now located over west-central Florida. NOAA WSR-88D radar data from Tampa Bay are showing 95-100 kt winds at an elevation of about 3500 ft, so the hurricane's intensity is estimated to be 85 kt.
Irma continues to have a large wind field, and exceptional hurricane- force wind gusts are still occurring well to the east of the center along the Florida east coast. Irma appears to be making some progress to the west of due north, and the longer-term initial motion is 350/12 kt. The cyclone is expected to swing around the eastern side of a mid-level disturbance currently located along the U.S. Gulf Coast, which should impart a north-northwestward to northwestward motion during the next 48 hours.
Due to its recent more inland push, Irma's center is now forecast to remain over Florida and then move over the southeastern United States for the duration of its existence. Due to continued land interaction and strong shear of over 30 kt, Irma should continue to lose strength and fall below hurricane intensity on Monday. The cyclone is then expected to become a remnant low over western Tennessee by day 3 and dissipate by day 4.
http://www.nhc.noaa.gov/text/refresh/MIATCDAT1+shtml/110244.shtml?
http://www.nhc.noaa.gov/graphics_at1.shtml?cone#contents
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