While out of the lake I like to use Weather Bug app on my phone, using the Laconia Municipal Airport for it's input. It will give you wind direction and speed, animated regional radar and short term forecast for storms. The ten day forcast is just OK though and changes often.
A new part of Weather Bug is
"Spark Lightning" which scans the region for lightning strikes. You can see strikes close by or up to a several hundred miles away on a map and it rescans so you can actually see them heading your way. This lets you plan ahead a little!
I try to use several weather info sources for pre-planning. WMUR weather (
http://www.wmur.com/weather) and the weather channel (
https://weather.com/. Plymouth State University Weather Center (
http://vortex.plymouth.edu/) has a good weather department and of course the National Weather Service out of Gray Maine (
http://www.weather.gov/gyx/).
If you have weather radio you can also get weather alerts while on the water (
http://www.nws.noaa.gov/nwr/). NOAA Weather Radio All Hazards (NWR) is a nationwide network of radio stations broadcasting continuous weather information directly from the nearest National Weather Service office. NWR broadcasts official Weather Service warnings, watches, forecasts and other hazard information 24 hours a day, 7 days a week.
Safe Boating!