National Hurricane Center 
Storm Surge Unit
1978 Gulf Steam Analysis Data

January       1978
February     1978
March          1978
April             1978
May              1978  - No data
June             1978     
July               1978
August         1978
November   1978
December   1978

Image below from NOAA Ocean Service Education, Gulf Steam Current webpage 8/17/2015 : http://oceanservice.noaa.gov/education/kits/currents/media/supp_cur05d.html