UNAUTH RWY ENTRY XING OP.

Narrative

WHILE TAXIING S ON TXWY A FROM RAMP BENEATH TWR; THE DOGLEG TURN TO TXWY B WAS MISSED DUE TO REDUCED VISIBILITY CONDITIONS CAUSED BY BLOWING SNOW WHICH WAS GUSTING UP TO 25 KTS OUT OF THE NW. WHEN THE ERROR WAS REALIZED AT THE INTXN OF TXWY A; F; AND RWY 35; WE INFORMED THE CTLR WE HAD MISSED THE TURN ON TXWY B AND WOULD REQUIRE A 180 DEG TURN TO GET BACK TO IT. AFTER ASSESSMENT OF THE CONDITIONS AT OUR LOCATION; I OPTED TO INFORM THE CTLR WE WOULD NEED TO CONTINUE DOWN TXWY F AND TAXI ON RWY 27 TO GET BACK TO TXWY B. THIS WAS APPROVED AND WE CROSSED RWY 35 CONTINUING ON TXWY F; TURNED L ONTO RWY 27 AND PROCEEDED AGAIN ACROSS RWY 35 TO TXWY B. AT THIS POINT THE CTLR ADVISED HOLD SHORT OF RWY 35 AND WE REPLIED 'WE JUST CROSSED RWY 35.' THE CTLR SEEMED CONFUSED OF OUR LOCATION AND ASKED OUR POS AT WHICH WE REPLIED 'WE ARE ON TXWY B; S.' STILL NOT SURE OF OUR POS; SHE COMMANDED A GAR OF A CHEYENNE TURBOPROP IF THEY HAD NOT LANDED. THEY HAD LANDED AND PASSED OFF OUR L AS WE PROCEEDED TO RWY 35 S ON TXWY B. THE CAUSE OF THIS PROB WAS THAT THE GND CTLR HAD THOUGHT WE TURNED W ON TXWY F AND DID NOT IMMEDIATELY INFORM US SHE WAS UNSURE O FOUR POS. WE DID REPEATEDLY INFORM HER OF OUR PROGRESS AND LOCATION; HOWEVER; DID NOT SPECIFICALLY USE MAGNETIC DIRECTION WHILE RPTING OUR MOVEMENT. WE WERE INFORMED OF HER INABILITY TO SEE US TOO LATE FOR US TO REALIZE THE NEED FOR MORE SPECIFIC UPDATES AS TO OUR PROGRESS AND LOCATION. IN CLOSING; IN REDUCED VISIBILITY SITS COM BTWN THE CTLRS AND PLTS MUST BE MUCH MORE SPECIFIC TO AVOID ANY POSSIBILITY OF CONFUSION AS TO THE LOCATION OF ACFT MOVEMENT ON THE FIELD.