diff --git a/parm/config/config.base.emc.dyn b/parm/config/config.base.emc.dyn
index 28b53ab7c2..639b277227 100755
--- a/parm/config/config.base.emc.dyn
+++ b/parm/config/config.base.emc.dyn
@@ -222,9 +222,9 @@ export gfs_cyc=@gfs_cyc@ # 0: no GFS cycle, 1: 00Z only, 2: 00Z and 12Z only, 4:
 export FHMIN_GFS=0
 
 export FHMAX_GFS_00=240
-export FHMAX_GFS_06=120
-export FHMAX_GFS_12=120
-export FHMAX_GFS_18=120
+export FHMAX_GFS_06=180
+export FHMAX_GFS_12=180
+export FHMAX_GFS_18=180
 export FHMAX_GFS=$(eval echo \${FHMAX_GFS_$cyc})
 
 export FHOUT_GFS=3