Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |  |
You should probably reach out to Dru Crawley and/or Linda Lawrie, I suspect one of them is responsible for this work.
There is a small mention in the EnergyPlus documentation here, but it doesn't give a lot of detail:
Using a heuristic method, the weather converter can determine typical and extreme weather periods for full year weather files. These will then be shown on the Typical/Extreme Periods header record. These are also reported in the statistical report output from the Weather Converter.
