Medium Transport; Low Wing; 2 Turboprop Eng
Flight Crew Air Transport Pilot (ATP)
Confusion; Situational Awareness
Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Other / Unknown; Ground Excursion Runway
Flight Crew Became Reoriented
Chart Or Publication; Human Factors; Weather; Airport
After breaking out under the clouds on the RNAV GPS RWY 34 at CIU during high winds and blowing snow partially obscuring the runway we both visually saw the runway pavement. Runway markings were poor and unfortunately we were unable to see the yellow chevrons depicting the relocated threshold. Both flight crew members thought that the runway began at the beginning of the paved surface. This being the case we touchdown short of the landing threshold by about 50 feet.Root cause was in my opinion a poor job of depicting this runway/relocated threshold on the Jeppesen 10-9 Chart; we looked up the government chart for the same airport and it clearly depicts the large portion of the runway that is no longer used for landing from this direction. Blowing snow and low visibility; and poorly painted markings all added to the lack up perceptibility of this layout. Improvement of the Jeppesen 10-9 Chart and a writeup in company charts explaining the situation should another crew execute this approach in similar meteorological conditions.
After breaking out of the clouds on final to runway 34 at CIU on a RNAV GPS approach; we had high winds and blowing snow conditions across the runway. We both visually saw the runway pavement; but due to the poor runway markings we were unable to see the yellow relocated threshold chevrons. My First Officer and I both thought the runway started at the beginning of the paved surface. Therefore our landing occurred outside of the actual marked runway. We landed approximately 50 ft inside of the displaced threshold.Poor Visibility and Poor Displaced runway markings. Also the 10-9 chart does not show the displacement accurately. Improve the 10-9 chart to better depict actual conditions and paint the chevrons so they are visible to the pilot.
Air Carrier flight crew reports landing prior to the displaced threshold for Runway 34 at CIU; due to poor runway markings; blowing snow and a poor depiction on the Jeppesen airport diagram.