The most popular forms of this kind of violations are copying the forecasts from the National Weather Service, the Weather Channel, or even from a competing station. A closer look at plagiarism laws will demonstrate that tweaking the numbers or changing the wording of someone else's forecast doesn't insulate you from liability.
If a station does not have the budget or the desire to hire someone who has the credentials to provide a forecast, the station should have two options:
1) Use the National Weather Service's forecast, giving proper credit.
2) Don't do weather at all.
Jason Cali
Ithaca, NY