diff --git a/CHANGELOG.md b/CHANGELOG.md
index 240d5d83..f7ed8477 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -22,6 +22,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+- Fixed bug in ASCAT EUMET soil moisture obs reader.
 - Fixed Restart=1 when the domain is not global.
 
 ### Removed
diff --git a/GEOSlandassim_GridComp/clsm_ensupd_read_obs.F90 b/GEOSlandassim_GridComp/clsm_ensupd_read_obs.F90
index 67aa07fe..3d412a45 100644
--- a/GEOSlandassim_GridComp/clsm_ensupd_read_obs.F90
+++ b/GEOSlandassim_GridComp/clsm_ensupd_read_obs.F90
@@ -1951,8 +1951,8 @@ subroutine read_obs_sm_ASCAT_EUMET(                                         &
           date_time_tmp%sec   = int(tmp_data(kk, 6))
           
           ! skip if record outside of current assim window
-          if ( datetime_lt_refdatetime( date_time_tmp, date_time_low ) .and.           &
-               datetime_le_refdatetime( date_time_up, date_time_tmp )         ) cycle
+          if ( datetime_lt_refdatetime( date_time_tmp, date_time_low ) .or.              &   ! obs is before start of assim window *or*
+               datetime_le_refdatetime( date_time_up,  date_time_tmp )         ) cycle       ! obs is after  end   of assim window
           
           ! skip if record contains invalid soil moisture value
           if ( tmp_data(kk, 7) > 100. .or. tmp_data(kk, 7) < 0. ) cycle