To get over the Green Mtn Spine, the BTV radar beam needs to be at least 1.5 degrees and best at 1.75 and I personally like the 2.2 degree scan… that puts the beam height in E.VT near the River/91 at like 8,500-13,000ft above the ground.
Where I am I need to sample 6,000ft at least overhead by the time it reaches me on an angle to clear Mansfield at 4,000ft ridgeline… despite being only like 25-30 miles from the radar site.
Meanwhile someone like Phin is 60 miles away from GYX radar but and gets sampled at 4,400ft elevation because he can use the 0.5 degree scan… he actually has better radar coverage than a lot of eastern VT past the Spine despite the much further distance away.