"Jim Macklin" wrote in message
news:deLag.21814$ZW3.6700@dukeread04...

Op-spec probably. FAA tower close often, many are
part-time. If there was a scheduled flight in-bound the
crew should have stayed a little overtime.


Why? Who's going to pay the overtime? Southwest?



But if the tower
is closed, no clearance is available for landing,


Nor is one required for landing.



but as
long as the last weather observation is current [less than
an hour] an IFR approach can be made under Part 91.


PVD has an ASOS, weather observations are available 24/7.