The worst radar coverage is by far eastern VT. The Spine close to BTV means we need to use higher scans, but if 2.4 degree is the first to clear the Spine, that angle is so steep that by the time it’s in eastern VT or the northeast kingdom, it’s at 12-15000 feet up. Like I-91 corridor, the radar is hitting 15,000ft up in the air, which isn’t going to give you much help in figuring out the surface.
In fact, at 15000ft in eastern VT, many times all the precipitation is occurring well below that, even synoptic precipitation. So you never even see the precip unless it’s summer convection punching high in the air.
I think that’s why @alex mentioned the lack of echoes in eastern VT... the beam keeps rising as the precip moves eastward, and eventually the beam is just going above the precipitation, because the Green Mtn Spine necessitates a steep initial scan angle.