How Does a Forecast Work?
What do they use?
The amount of water vapor in the air around you that makes everything sticky, but with out it we would not get rid of the water vapor and we would be getting lots of down pours.
The air pressuring on the earths surface to give the plants air with out the plants most of us would die from lack of air. That would be our faults.
Wind direction is whatever way the wind is blowing to blow the wind vanes a certen direction for how many days for this week of next week any week its possible.
Wind speed is how fast the wind is blowing for the day and wind speeds up and slows down throughout the day.