Prior to a flight, one of the many aviation weather forecasts that your pilots will reference is the weather radar. Weather radar is referenced to determine where there are locations of precipitation, such as rain, snow or thunderstorms. This type of weather can be contributing causes to turbulence, so for the pilots to have an accurate Flight Route Weather turbulence report, they will need to pinpoint areas of potentially unstable weather.
Weather Radar is available for everyone to look at, however, there is a major difference between radar that can be viewed on your local news weather, or on various weather websites. So whats the difference? If there is weather that is affecting the conditions on the surface, depending on the height of that weather, it may or may not even affect you at 35,000ft! Your pilots will reference a radar summary chart that will not only tell them the location of this weather, however, it will tell them the height that the weather extends to. As mentioned, just because you see areas of precipitation on the weather radar, this might not affect your flight path at all, and you might not even have turbulence as a result of it!