what was the highest wind speed recorded due to this event?
175 mph (280 km/h).
Hurricane John (1994)
 John also possessed the highest recorded wind speed in a central Pacific hurricane, 175 mph (280 km/h)
which countries were affected by hurricane john in the year 1994? The Hawaiian Islands and the United States military base on Johnston Atoll, and Alaska. from which water body did this cyclone originate? It was formed from a tropical wave of a water body off the coast of Africa.
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Hurricane John (1994) [SEP] Records
John also possessed the highest recorded wind speed in a central Pacific hurricane, 175 mph (280 km/h), a record shared with the aforementioned Patsy of 1959. Since 1994, only three Category 5 hurricanes, Ioke in 2006, and hurricanes Lane and Walaka in 2018 have formed in or entered into the Central Pacific. Despite this however, John's pressure record is incomplete; the 929 mbar reading was only measured when the winds were 160 mph; there is no pressure reading when it had winds of 175 mph, so it could have been stronger than Emilia, Gilma, Ioke, Lane, or Walaka. In addition, John was the first tropical cyclone to form in the east Pacific, east of 140°W, and also exist as a typhoon once it crossed 180°W; a feat only matched by Hurricane Genevieve in 2014.