Humidity actually has little effect on the resistance from air on a pitched baseball. We feel humidity's effects on our bodies and assume it is heavy air. However, it is actually lighter air for a baseball to travel through than dry air is. This is due to the additional molecules of the lighter weight hydrogen replacing the heavier molecules of nitrogen when air becomes more humid. In this visual representation we have selected humidity at 80% versus humidity at 20% to show the difference in the precise amount of ball movement.
This representation was provided to Clifton Neeley by Paulin Research, Houston, Texas, Mr. Tony Paulin, PE. The program utilizes physics formulas from the Physics of Baseball, by Dr. Robert Adair as well as studies by doctoral program students and known formulas in the engineering and aeronautics industries. The depiction is similar to a point to point launch of a ballistic missile or other projectile, converted to match the cover, weight, shape, density and circumference of a spinning baseball projected through the properties of natural air. Sincere thanks to Mr. Tony Paulin.
Mr. Paulin also utilized the NeeleyAir gauge formulas of Clifton Neeley, Air Resistance Technologies, Inc., Air Chamber Facilities, Inc., Altitude Sports Triages, Inc. in collaboration with Dr. Douglas Hittle, Professor Emeritus, Colorado State University; Gregory Martino, PE, Greeley, CO; Jonathan Rafacz, Dr. Feng Wang, Dr. Todd Sandrin, Arizona State University; Gene Vosteen, Foxstone Industries, Inc. Many thanks to all these people who collaborated to help with this project.