Sun Sep 10 2017 02:21 PM

Irma is being looped around (and eventually to within) the mid/upper-level vort diving down from the northwest. Center fixes show Irma to be bending back to the left a little as she gains latitude, and it is possible that she skirts western Florida with several landfalls.

It is growing apparent that the very gradual transition into a sub-tropical and eventually post-tropical cyclone is now underway, with dry air infiltrating Irma from the west, reducing not only precip (as can be seen on radar - not shown here), but the intensity of her winds in the western semicircle - perhaps by as much as a full category in addition to the half to full category that is already commonly reduced on that side of a TC (See recon data below - courtesy Tropical Tidbits).

The earliest beginnings of extra-tropical transition (going to take days to complete), along with how that mid-upper low is pinwheeling Irma around to the NNW-NW, is made clear in the water vapor image below

Image Credit: Tropical Tidbits

Irma is now a Cat III on the Saffir-Simpson wind scale. The Saffir-Simpson is not a measure of a hurricane's overall capacity to do damage. Remember, Katrina was a Cat III when she made her historic landfall near Buras-Triumph, Louisiana, and Ike was 'only' a Cat II when he made landfall over Galveston, Texas, yet these two TCs were some of the most destructive in history.

Note: This is NOT an official page. It is run by weather hobbyists and should not be used as a replacement for official sources. 
CFHC's main servers are currently located at in Orlando, FL.
Image Server Network thanks to Mike Potts and Amazon Web Services. If you have static file hosting space that allows dns aliasing contact us to help out! Some Maps Provided by:
Great thanks to all who donated and everyone who uses the site as well. Site designed for 800x600+ resolution
When in doubt, take the word of the National Hurricane Center