C650 CREW AND A C650 HAD LESS THAN LEGAL SEPARATION DEPARTING JAC; IN TRANSITION TO ZLC.

Narrative

AFTER DEPARTING JAC; TWR CLRED US 'ON COURSE' AND HANDED US OFF TO ZLC. CTR SAID WE WERE NOT ON RADAR YET; BUT WOULD SOON BE WITH HIGHER ALT. IT WAS A HOT DAY AT JAC AND CLB PERFORMANCE WAS EXPECTEDLY SLOW. ON AN ALMOST DUE E CLB TO RIW; WE WERE CLBING TOWARD THE MOUNTAINS E OF JAC. THERE WAS ALSO A TSTM 10 MI ON THE OTHER SIDE (E) OF THE MOUNTAIN. WE WERE CLBING SUCH AS TO CLR THE MOUNTAIN AND WERE ABOUT TO CALL CTR FOR A TURN TO THE S TO AVOID THE CELL. BEFORE WE COULD CALL; WE RECEIVED A TA ON AN ACFT AT OUR 2 O'CLOCK POS; IT WAS APPROX 1500 FT ABOVE US. I SPOTTED THE ACFT (LOOKED LIKE ANOTHER CITATION 650). I THEN GOT A RA 'MAINTAIN VERT SPD.' AT THAT POINT; THE OTHER ACFT BANKED SHARPLY TO THE R AND DOVE. WHEN I SAW HIM ENTER THE TURN; I KNEW TO KEEP MY HDG AND CLB STEADY AS HE HAD SEEN ME AND WAS MANEUVERING TO MISS US. I SAW THE ACFT PASS 200 FT BELOW AND ABOUT 500 FT TO OUR R. HE COMPLAINED TO CTR THAT THEY HAD HIM ON A COLLISION COURSE (WITH US). RIGHT AFTER THAT; CTR SAID WE WERE IN RADAR CONTACT; AND WE REQUESTED THE R TURN TO AVOID WX. THE REST OF THE FLT WAS UNEVENTFUL. I BELIEVE JAC NEEDS RADAR! CTR HAD THE OTHER ACFT; BUT NOT US DUE TO MOUNTAINOUS TERRAIN AND ALT. MUCH CLRER DEP RTES SHOULD BE PUT IN PLACE. ACFT SHOULD FLY THESE DEP RTES UNTIL IN RADAR CONTACT; THEN BE CLRED ON COURSE. ARRIVING ACFT SHOULD BE VECTORED AROUND THE DEP RTES.