Storm Research and Consulting

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 terminated production of these charts in early 2017. Similar charts are still available from various sites.

NCEP upper air charts at Storm Research

Additional sources of DiFax charts

• SUNY Albany DiFax
• Colorado State DiFax archive
• Iowa State DiFax

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Updated: October 2025