fix broadcasting problem in calculating alerts

only showing up when multiple lead times provided

include/evalhyd/detail/probabilist/contingency.hpp

@@ -56,9 +56,10 @@ namespace evalhyd
                 auto alert_lvl = xt::arange<double>(double(n_mbr + 1));
 
                 // determine whether forecast yield alert
-                return sum_f_k >=
-                        xt::view(alert_lvl, xt::newaxis(), xt::newaxis(),
-                                 xt::all(), xt::newaxis(), xt::newaxis());
+                return xt::view(sum_f_k, xt::all(), xt::all(), xt::newaxis(),
+                                xt::all(), xt::all())
+                       >= xt::view(alert_lvl, xt::newaxis(), xt::newaxis(),
+                                   xt::all(), xt::newaxis(), xt::newaxis());
             }
 
             /// Determine hits ('a' in contingency table).