Per #1714, clarify docs to state the genesis_match_window.end = 12 al…

…lows for matches for early forecasts. Also add an example of this option to the tc_gen unit test.

met/data/config/TCGenConfig_default

@@ -170,7 +170,8 @@ genesis_match_window = {
 dev_hit_radius = 500;
 
 //
-// Time window in hours for a development scoring method hit
+// Time window in hours, relative to the model genesis time, for a development
+// scoring method hit
 //
 dev_hit_window = {
    beg = -24;

met/docs/Users_Guide/tc-gen.rst

@@ -266,7 +266,7 @@ ______________________
      end = 0;
   }
 
-The **genesis_match_window** entry defines a time window, in hours, relative to the forecast genesis time. When searching for a match, only Best or operational tracks with a track point falling within this time window will be considered. The default time window of 0 requires a Best or operational track to exist at the forecast genesis time for a match to be found. Increasing this time window should lead to an increase in the number matched genesis pairs. For example, setting *beg = -12;* would allow the forecast genesis events to be up to 12 hours early.
+The **genesis_match_window** entry defines a time window, in hours, relative to the forecast genesis time. When searching for a match, only Best or operational tracks with a track point falling within this time window will be considered. The default time window of 0 requires a Best or operational track to exist at the forecast genesis time for a match to be found. Increasing this time window should lead to an increase in the number matched genesis pairs. For example, setting *end = 12;* would allow forecast genesis events to match Best tracks up to 12 hours prior to their existence.
 
 ______________________
 

test/config/TCGenConfig_2016

@@ -90,6 +90,11 @@ filter = [
       nc_pairs_flag = TRUE;
       output_flag   = { genmpr = BOTH; }
    },
+   {
+      desc                 = "AL_MATCH24HR";
+      basin_mask           = "AL";
+      genesis_match_window = { beg = 0; end = 24; };
+   },
    {
       desc          = "AL_DLAND_300NM";
       basin_mask    = "AL";
@@ -213,7 +218,8 @@ genesis_match_window = {
 dev_hit_radius = 500;
 
 //
-// Time window in hours for a development scoring method hit
+// Time window in hours, relative to the model genesis time, for a development 
+// scoring method hit
 //
 dev_hit_window = {
    beg = -24;