B737-400 CREW DEPARTED THE ORIGINATING STATION WITHOUT A REQUIRED MOUNTAIN TOP WIND RPT FOR THE DESIRED RWY AT THE DEST ARPT.

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ENRTE TO JNU. LOOKING AT THE WX INTO ZZZ1; THE CREW DECIDED EARLY ON THAT THE RNP TO RWY 26 WOULD BE THE BEST BASED ON WX AND BEING INBOUND FROM THE SW. THERE WAS NOTHING IN THE NOTAMS OR FIELD AND FACILITY RPTS THAT WOULD LEAD US TO QUESTION THE INTEGRITY OF THE APCH -- SATELLITE DATA WAS CURRENT AND SUITABLE FOR ALL LEVELS (.15; .2; .3). CHKING WITH OPS GOING OVER WE RECEIVED THE CURRENT JNU WX AS WELL AS THE CURRENT HILL WINDS. THE WX WAS NOT AN ISSUE AND DUE TO THE LIGHT WINDS NOT MUCH ATTN WAS PAID TO THE HILL WINDS. THE FO WAS THE PF AND THE RNAV BRIEFING CARD WAS REVIEWED AND THEN THE APCH PLATE WAS REVIEWED. AT THIS POINT THE CONNECTION BTWN MOUNTAIN WIND BEING INOP AND THAT IT IS REQUIRED FOR THE APCH WAS MISSED. THE APCH WAS REQUESTED FROM ATC AND APPROVED. IT WAS FLOWN IN MOSTLY VMC. AFTER REVIEWING THE PAPERWORK IN OPS; I TOLD THE AGENT WE WOULD BE GOING DOWN THE CHANNEL ON DEP. SHE COMMENTED THAT WE WOULD BE ONE OF THE FIRST FLTS GOING THAT WAY SINCE MOUNTAIN WINDS HAD BEEN INOP UNTIL JUST RECENTLY. THAT'S WHEN I REALIZED WE MAY HAVE FLOWN THE APCH WITH MOUNTAIN WINDS INOP. THE FACT THAT THE WINDS WERE LIGHT TO NON EXISTENT LED ME TO BE COMPLACENT ABOUT THE WIND REQUIREMENTS FOR THIS APCH.