And a new twist on this ridiculous situation, it appears that fixed wing aircraft are banned from even flying over Mount Pleasant below 3000ft when there is a Prob 30 of severe turbulence. This is the NOTAM:
19 Nov 2018 0700Z - 19 Nov 2018 1700Z
AD CLOSED TO VISITING FIXED WING AIRCRAFT DUE TO SEVERE TURBULENCE.
NO ZONE TRANSITS BELOW 3000FT AGL.
Interestingly the forecast period for rotors is 0900Z to 1600Z, it appears the airspace as well as the airfield are now being closed for a greater period than the forecast weather itself, what is that all about?