Upper-air DiFax archive

Storm Research and Consulting maintains an archive of upper-air charts from the National Weather Service. These black-and-white charts were originally broadcast over DIFAX and distributed to the NWS Forecast Offices across the United States. The NWS continues to produce these charts and they are available for download from the Telecommunications Operations Center (TCO).

NCEP DiFax archive at Storm Research

Additional sources of DiFax charts