The period of record indicates the beginning and ending dates in which the station was open. A process has been automated to import these stations into this system from other sources. State Searching by state can return many records in some states. You may want to use other methods to narrow your search. At the present time this system contains records for U.S. controlled stations only.
Plans are to add additional stations in the future.
The intent of depicting station types is to inform the user of the general nature of a given station. A five-digit station identifier used at NCDC for digital data storage and general station identification purposes. WBAN numbers were the first major attempt at a coordinated station numbering scheme among several weather reporting authorities. Dates associated with the WMO station identifier are unreliable. Information from the WMO Volume A publication has not been routinely incorporated into the NCDC station history data base.