
Some think that Hurricane Audrey had a pressure as low as 925 millibars and winds of 180 mph at a oil rig. It would be highly unusual to see a hurricane with such low pressure in June in Gulf of Mexico.
http://www.aoml.noaa.gov/general/lib/li ... s/1957.pdf
http://www.nhc.noaa.gov/data/hurdat/hur ... 021513.txt
The Doppler radar suggests it is probably Category 2 at most. It is also quite a large storm.