I am wondering a word to express the moderated values between long-lived and short-lived events. For example, I would like to describe heat wave durations. My durations are 1hr, 2hr, 3hr, .., 10hr. I expressed the durations of heat waves > 8hrs as long-lived events and 1-4hrs as short-lived events. I can't find a appropiated word to express 5-7hr events. Though moderated events sounds nice, but it is missing the live portion.
I proffer - Intermediate (events)
The word intermediate comes from the Latin intermediatus, tracing back to intermedius, which combines inter-, meaning “between” and medius, meaning “middle.” So you can see that intermediate describes something or someone in the middle, between two distinct phases.