LTT FLC CROSSED RWY AT PTK WITHOUT PROPER CLRNC IN POOR VISIBILITY CONDITIONS WITH SNOW ON THE SURFACE.

Narrative

UPON ARR AT PTK; MI; THE RPTED WX CALLED FOR PARTIALLY OBSCURED AND 3/4 MI VISIBILITY WITH SNOW SHOWERS. KNOWING THAT THE ACFT AHEAD OF US DID LAND; WE CONTINUED WITH THE APCH. WE BROKE OUT ABOUT 1700 FT MSL AND MADE CONTACT WITH RWY 9R 2.3 MI OUT AND LANDED ON RWY 9R. THE FRESH SNOW ON THE GND MADE IT ALMOST IMPOSSIBLE TO RECOGNIZE TXWYS AS WELL AS ANY OTHER ARPT SIGNS. DUE TO ACFT ON THE APCH BEHIND US; AS WELL AS THE TWR ASKING IF WE HAD CLRED THE RWY; AND A SNOW REMOVAL TRUCK TO OUR L-HAND ON THE TXWY; WE HAD PICTURED IN OUR MINDS FROM THE ARPT DIAGRAM THE PROMPTEST WAY OUT OF THE ACTIVE RWY WAS TO CONTINUE STRAIGHT AHEAD OUT RWY 9R AND A 45 DEG TURN TO THE L ON RWY 4. WE TAXIED TO THE COMPANY WHERE ARPT MAINT PERSON CAME AND TOLD US THAT WE HAD TAXIED THROUGH THE END OF RWY 9R AND THAT THERE IS NO TXWY OR EXIT. FORTUNATELY; THERE WAS NO DAMAGE TO ANY ARPT PROPERTY OR TO THE ACFT. WE WANTED TO RPT THIS BECAUSE IT COULD HELP AN UNFAMILIAR AIRMAN OPERATING AT THIS ARPT UNDER THE PREVIOUSLY MENTIONED CONDITIONS FROM DOING THE SAME MISTAKE THAT HAPPENED TO US. WE REALIZE WE SHOULD HAVE NOT ALLOWED OUTSIDE PRESSURE TO STOP US FROM PERFORMING WITH SAFETY; EVEN IF WE HAD TO STOP ON THE RWY.