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CID Transition Plan

Change Summary

Communications Identifiers (CID) Final Transition


Effective November 9, 2004 at 1600 coordinated universal time /UTC/ the final all encompassing /combined/ phase of the NWS communication identifer /cid/ transition plan will be implemented.  The NWS continues to standardize all communications identifiers (CID) to meet NWS AND World Meteorological Organization (WMO) CID Policies.  NWS CIDS consist of the WMO Heading on one line followed by the AWIPS Identifier on a second line.  Earlier in 2004, Weather Forecast Offices in Eastern Region of the National Weather Service transitioned to their end-state WMO Abbreviated heading lines (i.e. WMO headers) for non aviation forecasts, tropical cyclone products.  This transition will also include products from Eastern Region River Forecast Centers.

November 9, 2004 Goal (Backup date November 16, 2004)

The goal is to have all communication identifiers (CID) of all products issued by all NWS' offices transitioned to "end state" WMO headers.

How to Use this Site

We've provided pre-sorted excel file spreadsheets, which when selected, will show the pre-transition WMO headers and second line AWIPS Identifiers, and also show end-state WMO headers and second line AWIPS Identifiers.  

Descriptions of the downloadable Excel files content/structure can be found here.

These spreadsheets are downloadable files for you to use with search tools on your own computer systems.  All you have to do is right "click and save as"  in order to download these files to your computer.

Category Indicator (NNN)

WMO Headers

Weather Forecast Office (CCCC)/River Forecast Center(CCCC)

HTML Quick View of Category Changes

The link below will provide a quick view of Category Changes.  They do not include additions and deletions which are provided in the spreadsheets above.

Quick View of Category Changes

Downloading Plain Text Files

Click here to download a comma separated text file (.CSV) that can be easily imported into any spreadsheet.

What about additional upcoming changes to be issued by Eastern Region Offices?
Per the NWS CID Transition Plan Appendix C, Customers should expect some additional changes in order
to facilitate keeping local and national CID information in agreement.

Official Changes Notices


Eastern Region Headquarters Points of Contact
I. Ross Dickman,
Laurie Hogan,
Richard Watling,



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