JNU TWR RPTR EXPRESSED CONCERN REGARDING WIND TEST EQUIP (JUNEAU AREA WIND SYS; JAWS) BEING EVALUATED AT JNU AND THE EFFECT ON TFC FLOW(S).

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A NEW PIECE OF EQUIP IN TEST MODE; CAUSED A NUMBER OF IFR ACFT TO CHANGE THEIR RTE OF DEP; AT THE LAST MIN. JUNEAU AREA WIND SYS IS NEW AND UNIQUE TO JUNEAU ARPT. IT RPTS TURB ADVISORIES BASED ON WIND SENSORS AND ALGORITHMS (LETTER TO AIRMAN 05-1). THE PHRASEOLOGY REQUIRED IMPLIES THAT THIS IS 'REAL TIME; REAL LIFE' INFO. EXAMPLE: 'RWY 26 ARR SEVERE TURB FOR A B737.' ON THIS DAY; THE MACHINE WAS RPTING GASTINEAU CHANNEL SURFACE TO 6000 FT SEVERE TURB FOR A B737. THIS IS THE DEP CORRIDOR TO THE E OF THE ARPT. WHEN GIVEN THIS RPT; B737 SAID HE COULD NOT FLY INTO RPTED SEVERE TURB. EVEN WITH THE EQUIP BEING IN A LIVE TEST CYCLE; THE PLT DID NOT FEEL COMFORTABLE TAKING THE PLANNED DEP (DEPARTING RWY 8 STRAIGHT OUT TO THE E; THROUGH GASTINEAU CHANNEL). THE B737 ENDED UP TAKING APPROX A 13 KT TAILWIND AND GOING 20 NM OUT OF THE WAY TO AVOID POSSIBLE TURB (DEPARTED RWY 26 STRAIGHT OUT TO THE W). THIS RTE ALSO OVERLAPPED A SIGMET FOR SEVERE TURB BELOW 4000 FT TO THE W OF JUNEAU ARPT. I UNDERSTAND THE PLT HAD LITTLE CHOICE IN HIS RESPONSE. I FEEL IT IS UNWISE TO TEST THIS EQUIP IN THIS WAY. THIS IS THE FIRST LIVE DISPLAY AND I THINK THERE SHOULD BE BETTER PHRASEOLOGY ON THE FAA'S PART TO INDICATE THAT THIS IS ADVISORY ONLY. IN THE 2 WKS IT HAS BEEN HERE; THERE HAS NOT BEEN 1 PIREP THAT EXPERIENCED THE SAME LEVEL OF TURB BEING RPTED BY JUNEAU AREA WIND SYS; AND MANY RPTS FOR MUCH LESS TURB.