Assertion: hurricane's wind | /r/HasProperty | 280 km/h
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text: As the storm moved slowly westward, Hurricane John continued to strengthen considerably in an increasingly favorable environment well south of the Hawaiian Islands; on August 22, John was designated a Category 5 hurricane on the Saffir–Simpson hurricane scale (the highest classification for hurricanes) and later that day (by Hawaii Standard Time) reached its peak intensity, with 1-minute sustained winds of 175 miles per hour (280 km/h) and a minimum central pressure of 929 millibars (27.4 inHg).