diff --git a/src/libcode/vx_statistics/pair_base.cc b/src/libcode/vx_statistics/pair_base.cc
index a3b383f9fa..b1dfe46119 100644
--- a/src/libcode/vx_statistics/pair_base.cc
+++ b/src/libcode/vx_statistics/pair_base.cc
@@ -35,15 +35,38 @@ static bool sort_obs(ob_val_t a, ob_val_t b) { return a.val<b.val; }
 
 ////////////////////////////////////////////////////////////////////////
 //
-// Code for struct station_values_t
+// Code for struct station_value_base_t
 //
 ////////////////////////////////////////////////////////////////////////
 
-void station_values_t::clear() {
+void station_value_base_t::clear() {
+   typ.clear();
    sid.clear();
-   lat = lon = x = y = wgt = bad_data_double;
+   lat = lon = bad_data_double;
    ut = (unixtime) 0;
    lvl = elv = bad_data_double;
+}
+
+////////////////////////////////////////////////////////////////////////
+//
+// Code for struct station_values_t
+//
+////////////////////////////////////////////////////////////////////////
+
+void point_pair_t::clear() {
+   station_value_base_t::clear();
+   fval = oval= bad_data_double;
+}
+
+////////////////////////////////////////////////////////////////////////
+//
+// Code for struct station_values_t
+//
+////////////////////////////////////////////////////////////////////////
+
+void station_values_t::clear() {
+   station_value_base_t::clear();
+   x = y = wgt = bad_data_double;
    fcmn = fcsd = ocmn = ocsd = bad_data_double;
    summary_val = bad_data_double;
    obs.clear();
diff --git a/src/libcode/vx_statistics/pair_base.h b/src/libcode/vx_statistics/pair_base.h
index a734d1af31..c06a7f89c0 100644
--- a/src/libcode/vx_statistics/pair_base.h
+++ b/src/libcode/vx_statistics/pair_base.h
@@ -32,7 +32,7 @@ struct ob_val_t {
    std::string qc;
 };
 
-struct station_values_t {
+struct station_value_base_t {
 
    void clear();
 
@@ -40,12 +40,26 @@ struct station_values_t {
    std::string sid;
    double lat;
    double lon;
-   double x;
-   double y;
-   double wgt;
    unixtime ut;
    double lvl;
    double elv;
+};
+
+struct point_pair_t : station_value_base_t {
+
+   void clear();
+
+   double fval;
+   double oval;
+};
+
+struct station_values_t : station_value_base_t {
+
+   void clear();
+
+   double x;
+   double y;
+   double wgt;
    double fcmn;
    double fcsd;
    double ocmn;