+2.3 Release
+-----------
+Fixed a regression in the correlate function which reintroduced the
+wrong (old) URLs for zone-specific data sources, and corrected the
+entries in the zones file accordingly.
+
+2.2 Release
+-----------
+Fixed a bug where the setpath search order was effectively being
+reversed.
+
+Updated correlation data is included based on newer 2015 Census data and
+2016 NWS station and zone lists.
+
+2.1 Release
+-----------
+The old http://weather.noaa.gov/pub site was deprecated and as of August
+23 subsequently removed from service. Correlation data files have been
+updated to use the working http://tgftp.nws.noaa.gov URL instead.
+
+Updated correlation data is included based on newer 2014 Census data.
+
+The correlation data rebuilding process has been improved and more
+thoroughly documented.
+
+Radian floats in correlation data are now truncated to 7 decimal places,
+significantly reducing rounding error fuzz against future data file
+updates.
+
+The /etc/weather/weatherrc file mentioned in documentation is now
+properly read.
+