This is not a question how to use the formulas. More where do you get the numbers.
Lots of people use 4 feet per degree 'rule of thumb' but where do you get the 4 from?
If this is from the other rule of thumb using 120ft/degree and then dividing it by 30 millibars to get 4, whats the formula to give you the 120 figure please?
I need a few less rules of thumb and a better understanding right now. Any help would be much appreciated.
- A Rule of thumb!