Hurricane Irma Public Advisory
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WTNT31 KNHC 312031
Hurricane Irma Advisory Number 6
NWS National Hurricane Center Miami FL AL112017
500 PM AST Thu Aug 31 2017
…IRMA BECOMES A CATEGORY 3 HURRICANE OVER THE EASTERN ATLANTIC…
SUMMARY OF 500 PM AST…2100 UTC…INFORMATION
ABOUT 720 MI…1160 KM W OF THE CABO VERDE ISLANDS
ABOUT 1780 MI…2865 KM E OF THE LEEWARD ISLANDS
MAXIMUM SUSTAINED WINDS…115 MPH…185 KM/H
PRESENT MOVEMENT…WNW OR 290 DEGREES AT 12 MPH…19 KM/H
MINIMUM CENTRAL PRESSURE…967 MB…28.56 INCHES
WATCHES AND WARNINGS
There are no coastal watches or warnings in effect.
DISCUSSION AND 48-HOUR OUTLOOK
At 500 PM AST (2100 UTC), the center of Hurricane Irma was located
near latitude 17.3 North, longitude 34.8 West. Irma is moving
toward the west-northwest near 12 mph (19 km/h). This motion is
expected to continue today, followed by a westward turn on Saturday,
and a west-southwestward motion by Sunday.
Maximum sustained winds have increased to near 115 mph (185 km/h)
with higher gusts. Irma is a category 3 hurricane on the
Saffir-Simpson Hurricane Wind Scale. Fluctuations in strength,
both up and down, are possible, but Irma is expected to remain a
powerful hurricane for several days.
Hurricane-force winds extend outward up to 15 miles (30 km) from the
center and tropical-storm-force winds extend outward up to 80 miles
The estimated minimum central pressure is 967 mb (28.56 inches).
HAZARDS AFFECTING LAND
Next complete advisory at 1100 PM AST.