diff --git a/src/MNH/lima_ccn_activation.f90 b/src/MNH/lima_ccn_activation.f90
index cc3566ec5a2656bf96595a59961809abfb8eb038..44bff2677a432073d12a1f8f606ff46271e3f70e 100644
--- a/src/MNH/lima_ccn_activation.f90
+++ b/src/MNH/lima_ccn_activation.f90
@@ -394,7 +394,7 @@ IF( INUCT >= 1 ) THEN
       ZZW2(:) = 0.
       ZZW3(:) = 0.
    !
-      WHERE( SUM(ZTMP(:,:),DIM=2) .GT. 25.E6/ZRHODREF(:) ) 
+      WHERE( SUM(ZTMP(:,:),DIM=2) .GT. 15.E6/ZRHODREF(:) ) 
          ZZW1(:) = MIN( ZNFT(:,JMOD),MAX( ZTMP(:,JMOD)- ZNAT(:,JMOD) , 0.0 ) )
       ENDWHERE
    !
diff --git a/src/MNH/lima_warm_nucl.f90 b/src/MNH/lima_warm_nucl.f90
index c670a567887be0d5414d036a4611adba33dc7233..ff936b6cbe24da64ca7044c1baf6e3f31e01914f 100644
--- a/src/MNH/lima_warm_nucl.f90
+++ b/src/MNH/lima_warm_nucl.f90
@@ -453,7 +453,7 @@ IF( INUCT >= 1 ) THEN
       ZZW2(:) = 0.
       ZZW3(:) = 0.
    !
-      WHERE( SUM(ZTMP(:,:),DIM=2)*PTSTEP .GT. 25.E6/ZRHODREF(:) ) 
+      WHERE( SUM(ZTMP(:,:),DIM=2)*PTSTEP .GT. 15.E6/ZRHODREF(:) ) 
          ZZW1(:) = MIN( ZNFS(:,JMOD),MAX( ZTMP(:,JMOD)- ZNAS(:,JMOD) , 0.0 ) )
       ENDWHERE
    !