A radio station program director once told me that it's best to introduce weather forecasts by just saying, "KBIA (i.e. the station's call letters) Weather." He's right. A weather forecast doesn't need an elaborate buildup such as, "Now, here is your reliable and accurate weather forecast for the metro area and vicinity."
I also think there's no reason to say, when giving Monday's forecast, "On Monday, back to work..." People who have to work Monday already know it's a back-to-work day; the reminder isn't necessary.
