Pretty much exactly what you do. I like the radar map on Intellicast.com best. You can change the opacity and see the lake. I place the cursor on my computer right over my house and watch the direction of the storms.....
I can usually tell exactly what the weather will be by simply watching the radar.
Then I like Kevin Skarupa's forecast., He seems to get it right a majority of the time while others on WMUR just copy Kevin's forecast.....
