In the remarks section: "IFR flt are not permitted to tkof fr Rwy 15 or apch and ldg on Rwy 33."
So depending on the wind they might not had the option to land IFR.
You can circle to land if the approach is only one direction. Basically shoot the approach to minimums. Tower will say, circle to land north/south and you fly a normalish pattern, lower to the other end of the runway.
Circle to land requires visibility, you need to keep the runway in sight during the whole maneuver. So that wouldn't really have helped them in this situation.