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Special Announcement

The Office of Hydrologic Development maintains historical hydrologic data up to September 30, 2005.

NEXRAD Stage III File Description


These data products are encoded in binary format.  The individual hourly products have a naming convention of the following format:

"xmrgmmddyyhh"

For the period of record prior to January 2002:
Each day these encoded products are compressed and tarred into a daily file named "SiiimmddyyRFCID.tar". At the end of month, these daily files are tarred into a monthly file and posted on the web in the form of "SiiimmyyRFCID.tar".

For the period of record since January 2002:
Each day these encoded products are compressed and tarred into a daily file named "stage3_mmddyyyy_RFCID.tar". At the end of month, these daily files are tarred into a monthly file and posted on the web in the form of "stage3_mmyyyy_RFCID.tar".

To extract hourly NEXRAD Stage III files, first untar the monthly files to get the daily files, then untar the daily files to get the compressed hourly files, then uncompress the hourly files.

Use the UNIX tar and uncompress utilities or equivalent.

The following notation applies.

	mm	two-digit month number (01-12)
	dd	two-digit day of the month (01-31)
	yy	two-digit year (00-99)
	yyyy	four-digit year (beginning 2002)
	hh	two-digit hour in UTC (00-23)
	RFCID	two character River Forecast Center identifier


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Page last modified: April 19, 2010

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