diff --git a/datm/cime_config/stream_definition_datm.xml b/datm/cime_config/stream_definition_datm.xml
index 4da427f2..07f05f82 100644
--- a/datm/cime_config/stream_definition_datm.xml
+++ b/datm/cime_config/stream_definition_datm.xml
@@ -4619,10 +4619,10 @@
       <meshfile>$ATM_DOMAIN_MESH</meshfile>
     </stream_meshfile>
     <stream_datafiles>
-      <file first_year="$DATM_YR_START" last_year="$DATM_YR_END">$DATM_CPLHIST_DIR/$DATM_CPLHIST_CASE.cpl.ha2x3h.%ym.nc</file>
+      <file first_year="$DATM_YR_START" last_year="$DATM_YR_END">$DATM_CPLHIST_DIR/$DATM_CPLHIST_CASE.cpl.hx.atm.3h.avrg.%ymd-10800.nc</file>
    </stream_datafiles>
     <stream_datavars>
-      <var>a2x3h_Sa_topo  Sa_topo</var>
+      <var>atmImp_Sa_topo  Sa_topo</var>
     </stream_datavars>
     <stream_lev_dimname>null</stream_lev_dimname>
     <stream_mapalgo>
@@ -4649,23 +4649,23 @@
       <meshfile>$ATM_DOMAIN_MESH</meshfile>
     </stream_meshfile>
     <stream_datafiles>
-      <file first_year="$DATM_YR_START" last_year="$DATM_YR_END">$DATM_CPLHIST_DIR/$DATM_CPLHIST_CASE.cpl.ha2x1d.%ym.nc</file>
+      <file first_year="$DATM_YR_START" last_year="$DATM_YR_END" filename_advance_days='1'>$DATM_CPLHIST_DIR/$DATM_CPLHIST_CASE.cpl.hx.atm.24h.avrg.%ymd-00000.nc</file>
     </stream_datafiles>
     <stream_datavars>
-      <var>a2x1d_Faxa_bcphiwet  Faxa_bcphiwet</var>
-      <var>a2x1d_Faxa_bcphodry  Faxa_bcphodry</var>
-      <var>a2x1d_Faxa_bcphidry  Faxa_bcphidry</var>
-      <var>a2x1d_Faxa_ocphiwet  Faxa_ocphiwet</var>
-      <var>a2x1d_Faxa_ocphidry  Faxa_ocphidry</var>
-      <var>a2x1d_Faxa_ocphodry  Faxa_ocphodry</var>
-      <var>a2x1d_Faxa_dstwet1   Faxa_dstwet1</var>
-      <var>a2x1d_Faxa_dstdry1   Faxa_dstdry1</var>
-      <var>a2x1d_Faxa_dstwet2   Faxa_dstwet2</var>
-      <var>a2x1d_Faxa_dstdry2   Faxa_dstdry2</var>
-      <var>a2x1d_Faxa_dstwet3   Faxa_dstwet3</var>
-      <var>a2x1d_Faxa_dstdry3   Faxa_dstdry3</var>
-      <var>a2x1d_Faxa_dstwet4   Faxa_dstwet4</var>
-      <var>a2x1d_Faxa_dstdry4   Faxa_dstdry4</var>
+      <var>atmImp_Faxa_bcph1 Faxa_bcphidry</var>
+      <var>atmImp_Faxa_bcph2 Faxa_bcphodry</var>
+      <var>atmImp_Faxa_bcph3 Faxa_bcphiwet</var>
+      <var>atmImp_Faxa_ocph1 Faxa_ocphidry</var>
+      <var>atmImp_Faxa_ocph2 Faxa_ocphodry</var>
+      <var>atmImp_Faxa_ocph3 Faxa_ocphiwet</var>
+      <var>atmImp_Faxa_dstwet1 Faxa_dstwet1</var>
+      <var>atmImp_Faxa_dstdry1 Faxa_dstdry1</var>
+      <var>atmImp_Faxa_dstwet2 Faxa_dstwet2</var>
+      <var>atmImp_Faxa_dstdry2 Faxa_dstdry2</var>
+      <var>atmImp_Faxa_dstwet3 Faxa_dstwet3</var>
+      <var>atmImp_Faxa_dstdry3 Faxa_dstdry3</var>
+      <var>atmImp_Faxa_dstwet4 Faxa_dstwet4</var>
+      <var>atmImp_Faxa_dstdry4 Faxa_dstdry4</var>
     </stream_datavars>
     <stream_lev_dimname>null</stream_lev_dimname>
     <stream_mapalgo>
@@ -4724,13 +4724,13 @@
       <meshfile>$ATM_DOMAIN_MESH</meshfile>
     </stream_meshfile>
     <stream_datafiles>
-      <file first_year="$DATM_YR_START" last_year="$DATM_YR_END">$DATM_CPLHIST_DIR/$DATM_CPLHIST_CASE.cpl.ha2x1hi.%ym.nc</file>
+      <file first_year="$DATM_YR_START" last_year="$DATM_YR_END">$DATM_CPLHIST_DIR/$DATM_CPLHIST_CASE.cpl.hx.atm.1h.inst.%ymd-03600.nc</file>
     </stream_datafiles>
     <stream_datavars>
-      <var>a2x1hi_Faxa_swndr Faxa_swndr</var>
-      <var>a2x1hi_Faxa_swvdr Faxa_swvdr</var>
-      <var>a2x1hi_Faxa_swndf Faxa_swndf</var>
-      <var>a2x1hi_Faxa_swvdf Faxa_swvdf</var>
+      <var>atmImp_Faxa_swndr Faxa_swndr</var>
+      <var>atmImp_Faxa_swvdr Faxa_swvdr</var>
+      <var>atmImp_Faxa_swndf Faxa_swndf</var>
+      <var>atmImp_Faxa_swvdf Faxa_swvdf</var>
     </stream_datavars>
     <stream_lev_dimname>null</stream_lev_dimname>
     <stream_mapalgo>
@@ -4740,7 +4740,7 @@
     <stream_year_align>$DATM_YR_ALIGN</stream_year_align>
     <stream_year_first>$DATM_YR_START</stream_year_first>
     <stream_year_last>$DATM_YR_END</stream_year_last>
-    <stream_offset>2700</stream_offset>
+    <stream_offset>-900</stream_offset>
     <stream_tintalgo>
       <tintalgo>nearest</tintalgo>
     </stream_tintalgo>
@@ -4758,14 +4758,14 @@
       <meshfile>$ATM_DOMAIN_MESH</meshfile>
     </stream_meshfile>
     <stream_datafiles>
-      <file first_year="$DATM_YR_START" last_year="$DATM_YR_END">$DATM_CPLHIST_DIR/$DATM_CPLHIST_CASE.cpl.ha2x3h.%ym.nc</file>
+      <file first_year="$DATM_YR_START" last_year="$DATM_YR_END">$DATM_CPLHIST_DIR/$DATM_CPLHIST_CASE.cpl.hx.atm.3h.avrg.%ymd-10800.nc</file>
     </stream_datafiles>
     <stream_datavars>
-      <var>a2x3h_Faxa_rainc Faxa_rainc</var>
-      <var>a2x3h_Faxa_rainl Faxa_rainl</var>
-      <var>a2x3h_Faxa_snowc Faxa_snowc</var>
-      <var>a2x3h_Faxa_snowl Faxa_snowl</var>
-      <var>a2x3h_Faxa_lwdn  Faxa_lwdn</var>
+      <var>atmImp_Faxa_rainc Faxa_rainc</var>
+      <var>atmImp_Faxa_rainl Faxa_rainl</var>
+      <var>atmImp_Faxa_snowc Faxa_snowc</var>
+      <var>atmImp_Faxa_snowl Faxa_snowl</var>
+      <var>atmImp_Faxa_lwdn  Faxa_lwdn</var>
     </stream_datavars>
     <stream_lev_dimname>null</stream_lev_dimname>
     <stream_mapalgo>
@@ -4793,18 +4793,18 @@
       <meshfile>$ATM_DOMAIN_MESH</meshfile>
     </stream_meshfile>
     <stream_datafiles>
-      <file first_year="$DATM_YR_START" last_year="$DATM_YR_END">$DATM_CPLHIST_DIR/$DATM_CPLHIST_CASE.cpl.ha2x3h.%ym.nc</file>
+      <file first_year="$DATM_YR_START" last_year="$DATM_YR_END">$DATM_CPLHIST_DIR/$DATM_CPLHIST_CASE.cpl.hx.atm.3h.avrg.%ymd-10800.nc</file>
     </stream_datafiles>
     <stream_datavars>
-      <var>a2x3h_Sa_z       Sa_z</var>
-      <var>a2x3h_Sa_tbot    Sa_tbot</var>
-      <var>a2x3h_Sa_ptem    Sa_ptem</var>
-      <var>a2x3h_Sa_shum    Sa_shum</var>
-      <var>a2x3h_Sa_pbot    Sa_pbot</var>
-      <var>a2x3h_Sa_dens    Sa_dens</var>
-      <var>a2x3h_Sa_pslv    Sa_pslv</var>
-      <var>a2x3h_Sa_co2diag Sa_co2diag</var>
-      <var>a2x3h_Sa_co2prog Sa_co2prog</var>
+      <var>atmImp_Sa_z       Sa_z</var>
+      <var>atmImp_Sa_tbot    Sa_tbot</var>
+      <var>atmImp_Sa_ptem    Sa_ptem</var>
+      <var>atmImp_Sa_shum    Sa_shum</var>
+      <var>atmImp_Sa_pbot    Sa_pbot</var>
+      <var>atmImp_Sa_dens    Sa_dens</var>
+      <var>atmImp_Sa_pslv    Sa_pslv</var>
+      <var>atmImp_Sa_co2diag Sa_co2diag</var>
+      <var>atmImp_Sa_co2prog Sa_co2prog</var>
     </stream_datavars>
     <stream_lev_dimname>null</stream_lev_dimname>
     <stream_mapalgo>
@@ -4832,11 +4832,11 @@
       <meshfile>$ATM_DOMAIN_MESH</meshfile>
     </stream_meshfile>
     <stream_datafiles>
-      <file first_year="$DATM_YR_START" last_year="$DATM_YR_END">$DATM_CPLHIST_DIR/$DATM_CPLHIST_CASE.cpl.ha2x1h.%ym.nc</file>
+      <file first_year="$DATM_YR_START" last_year="$DATM_YR_END">$DATM_CPLHIST_DIR/$DATM_CPLHIST_CASE.cpl.hx.atm.1h.avrg.%ymd-03600.nc</file>
     </stream_datafiles>
     <stream_datavars>
-      <var>a2x1h_Sa_u  Sa_u</var>
-      <var>a2x1h_Sa_v  Sa_v</var>
+      <var>atmImp_Sa_u  Sa_u</var>
+      <var>atmImp_Sa_v  Sa_v</var>
     </stream_datavars>
     <stream_lev_dimname>null</stream_lev_dimname>
     <stream_mapalgo>