What was found
FROM 100 NM NORTH OF RNO TO 50 NM SOUTH OF RNO RADAR DISPLAY DISPLAYED INTENSE ECHO & TURBULENCE (RED DOTS) IN ONE SOLID LINE FOR 200 TMI @ OUR 10 O' CLOCK, ERRONEOUSLY (IT WAS CLEAR). GROUNDED - YES. UPON A/C ARRIVAL, PER CREW THERE WERE NO SIGN OF UNUSUAL ACTIVITY, NO FLAG OR ANY FAULT OBSERVED IN FLT DECKPERFORMED WXR SYS OPS TEST REF MM 34-43-00UNABLE TO DUPLICATE THE FAULT ON GROUNDALL SYSTEM TEST OPS NORMAL @THIS TIME.NO HISTORY PAST 30 DAYS.