Definitely for the geek!!!
Definitely not for the geek!!! If you are not tracking the weather you are not making horsepower.
It's not about the weather, it's about the amount of oxygen that is available to the engine.
Hotter temperatures expand the air and make less available to the engine. Higher altitude does the same thing. Humidity displaces the air.
Knowing how much oxygen is available at the start of the run allows you to match the fuel to the oxygen.
If this is all new to you, buy the book and buy a weather station. El Mirage and Bonneville make the current density altitude available on request, but there is nothing like having the information at your fingertips.
