...RAFAEL STRENGTHENING AS IT HEADS TOWARDS THE CAYMAN ISLANDS...

Reports from an Air Force Reserve Hurricane Hunter aircraft
indicate that maximum sustained winds have increased to near 70 mph with higher gusts. Steady to rapid intensification is expected during the next 24 hour or so, and Rafael is expected to become a hurricane during the next several hours as it passes near the Cayman Islands with further strengthening before it makes
landfall in Cuba.

https://www.nhc.noaa.gov/text/refresh/MIATCPAT3+shtml/052041.shtml?