If I end up with 8", I'll melt, but none of you will have the pleasure of viewing it....only my daughter will witness it, as I rip the limbs off of her dolls.
The upper tier of the ranges are never meant to be widespread...localized banding under max ratios...most likely ne corner of state or SE NH.
Most spots 12-15".
Whenever unsure about H7 RH, go conservative.....course of least regret. 9/10 times there is a reason you are conservative and its warranted...trust your instinct.
My point is there are a few red flags that give me pause...I know I often talk like 18" events grow on trees, but I know that they do not. Take a pretty special set of circumstances.