For alternate release scenarios, RMP*Comp uses set values for meteorological conditions like humidity, wind speed, temperature, stability class, and so on. Is there a way to change those values? I want to use meteorology data from my own location.

RMP*Comp indeed uses fixed values for certain atmospheric parameters, and does not allow them to be set by the user. This is because the software is intended as a simplified model, adhering to the EPA's Offsite Consequence Analysis Guidance (OCA Guidance) Opens a New Window. , that is acceptable for compliance with the Risk Management Program (RMP) Rule. Other tools/models may also be used. In order to use local meteorological data, you'd have to use one of those other tools (such as ALOHA).