This is a very dangerous storm. My thoughts are for jstarebel who is going to be close to the eye and my friends in SKN who are already boarded up and locked down.
NHC 5am relevant points:
LOCATION...16.6N 57.0W (still slight drift south)
ABOUT 320 MI...515 KM E OF THE LEEWARD ISLANDS
MAXIMUM SUSTAINED WINDS...150 MPH...240 KM/H
PRESENT MOVEMENT...W OR 270 DEGREES AT 14 MPH...22 KM/H
MINIMUM CENTRAL PRESSURE...937 MB...27.67 INCHES
Interests in the Dominican Republic, Haiti, the Turks and Caicos
Islands, Cuba, and the southeastern and central Bahamas should
monitor the progress of Irma.
At 500 AM AST (0900 UTC), the distinct eye of Hurricane Irma was
located near latitude 16.6 North, longitude 57.0 West. Irma is
moving toward the west near 14 mph (22 km/h), and this general
motion is expected to continue today, followed by a turn toward the
west-northwest tonight.
Hurricane-force winds extend outward up to 45 miles (75 km) from the
center and tropical-storm-force winds extend outward up to 140 miles
(220 km).
FORECAST POSITIONS AND MAX WINDS
INIT 05/0900Z 16.6N 57.0W 130 KT 150 MPH
12H 05/1800Z 17.0N 58.9W 130 KT 150 MPH
24H 06/0600Z 17.7N 61.5W 130 KT 150 MPH
36H 06/1800Z 18.6N 64.2W 130 KT 150 MPH
48H 07/0600Z 19.6N 67.0W 125 KT 145 MPH
72H 08/0600Z 21.2N 72.5W 120 KT 140 MPH
96H 09/0600Z 22.4N 77.2W 115 KT 130 MPH
120H 10/0600Z 24.0N 81.0W 115 KT 130 MPH
Recon and satellite fixes indicate that Irma is moving toward the
west or 270 degrees at 12 kt. The hurricane is moving around the
periphery of the Atlantic subtropical ridge, which in fact is quite
strong at this time. This persistent pattern should keep Irma on a
general westward track for the next 24 hours, with a west-northwest
track thereafter. The guidance envelope and many of the ensemble
members of the GFS and the ECMWF models have shifted slightly
westward since the previous run. The NHC forecast also shifted
slightly westward, and it is on top of the multi-model consensus.
The confidence in the forecast beyond 3 days is lower, since the
guidance spreads out more.
Users are reminded to not focus on the exact forecast track,
especially at the longer ranges, since the average NHC track errors
are about 175 and 225 statute miles at days 4 and 5, res
Irma could directly affect Hispaniola, the Turks and Caicos, the
Bahamas, and Cuba as a dangerous major hurricane later this week.
Track is still about 100km north of north coast and there is a gradual consensus towards the NHC track in the models from 2am. But the UKMet which is proving the good forecaster of this storm has many of its ensemble models impacting DR. It will be much clearer when the time the storm turns to the north later today as the NHC predicts. I pray for early advice from NHC later today of that turn to keep it far enough away from us.
For those on the north coast they should be completing their hurricane preparation in expectation of hurricane watches or warnings being issued today rather than tropical storm watches with tropical storm conditions being due within 48 hours. Don't be complacent we will likely get some very strong tropical storm force winds and even gusts to hurricane force, loads of rain and storm surge despite being on the normally weaker south side of the storm.
Assume the worst and hope for the best.