Mesonet

In meteorology, a mesonet is a network of automated weather stations designed to observe mesoscale meteorological phenomena.  Dry lines, squall lines, and  sea breezes are examples of phenomena that can be observed by mesonets. Due to the space and time scales associated with mesoscale phenomena, weather stations comprising a mesonet will be spaced closer together and report more frequently than synoptic scale observing networks, such as ASOS. The term mesonet refers to the collective group of these weather stations, and are typically owned and operated by a common entity.
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A regional network of observing stations (usually surface stations) designed to diagnose mesoscale weather features and their associated processes.