The town ranges from like 200’ on the Willington line by the river there to 400’ on 195 as you head towards Uconn to 650’ thru center of town and then you’ve got 700-1100 in areas NE and especially north and NW side . I can see there being 3-4 inch discrepancies across the town . It’s an impossible forecast . Over the years I’ve found that generally 700 feet you notice a difference and at 800 feet is when it really starts to kick in . The icestorm was a great example of that last February