A Dorset Live Weather area is a public local weather product. It may be supported by one approved station or by a pool of several suitable stations whose observations are checked and combined by the DLW engine.
This gives the service room to become more resilient as coverage grows. If one contributor is unavailable, an area may continue using other eligible sources. If the area itself cannot provide an observation that meets its freshness rules, the website shows that honestly rather than pretending an old value is live.