diff --git a/src/MNH/default_desfmn.f90 b/src/MNH/default_desfmn.f90
index 31b7b67ad7344e82383ff43a48130dbbc9a90b29..36b80f40a1b90000184a56b3616d2a2810de3e35 100644
--- a/src/MNH/default_desfmn.f90
+++ b/src/MNH/default_desfmn.f90
@@ -980,6 +980,7 @@ NFREQSERIES  = MAX(NFREQSERIES,1)
 IF (KMI == 1) THEN
   LMEAN_FIELD = .FALSE.
   LCOV_FIELD  = .FALSE.
+  LUH_MAX = .FALSE.
 ENDIF
 !
 !-------------------------------------------------------------------------------
diff --git a/src/MNH/ini_mean_field.f90 b/src/MNH/ini_mean_field.f90
index dadf0dcec8dba06ddad2515190a39b20ada79fea..5dddb8bd5d9e7626c0f3aa8f256d192162eab980 100644
--- a/src/MNH/ini_mean_field.f90
+++ b/src/MNH/ini_mean_field.f90
@@ -151,7 +151,7 @@ XWM1_MIN = 1.E20 !
 
 XMSLP_MAX = -1.E20 ! 
 XMSLP_MIN = 1.E20 ! 
-XUH_MAX = -1.E20 ! 
+IF (LUH_MAX) XUH_MAX = -1.E20 ! 
 
 XWMOD10MAX_MAX = 0.0
 XTKEMAX_MAX = 0.0
diff --git a/src/MNH/ini_modeln.f90 b/src/MNH/ini_modeln.f90
index 42bf02412f6a92f60c382adc2bc7ef8d33a503d4..eff106fd5b8b9a94576d511bf9831a8c93931122 100644
--- a/src/MNH/ini_modeln.f90
+++ b/src/MNH/ini_modeln.f90
@@ -842,7 +842,11 @@ IF (LMEAN_FIELD) THEN
   ALLOCATE(XWM1_MIN(IIU,IJU,IKU))      ; XWM1_MIN = 1.E20 ! 
   ALLOCATE(XMSLP_MAX(IIU,IJU))      ; XMSLP_MAX = -1.E20 ! 
   ALLOCATE(XMSLP_MIN(IIU,IJU))      ; XMSLP_MIN = 1.E20 ! 
-  ALLOCATE(XUH_MAX(IIU,IJU))      ; XUH_MAX = -1.E20 ! 
+  IF (LUH_MAX) THEN
+    ALLOCATE(XUH_MAX(IIU,IJU))      ; XUH_MAX = -1.E20
+  ELSE
+    ALLOCATE(XUH_MAX(0,0))
+  END IF
   ALLOCATE(XWMOD10MAX_MAX(IIU,IJU))     ; XWMOD10MAX_MAX = 0.0
   ALLOCATE(XFF10MAX_MAX(IIU,IJU))     ; XFF10MAX_MAX = 0.0
   ALLOCATE(XFF10MAX2_MAX(IIU,IJU))     ; XFF10MAX2_MAX = 0.0
@@ -896,6 +900,7 @@ ELSE
   ALLOCATE(XVM1_MIN(0,0,0)) ! 
   ALLOCATE(XWM1_MIN(0,0,0)) ! 
   ALLOCATE(XFF10MAX_MAX(0,0))
+  ALLOCATE(XWMOD10MAX_MAX(0,0))
   ALLOCATE(XFF10MAX2_MAX(0,0))
   ALLOCATE(XFF10MAX_AROME_MAX(0,0))
   ALLOCATE(XMSLP_MAX(0,0)) ! 
diff --git a/src/MNH/mean_field.f90 b/src/MNH/mean_field.f90
index 2efc04c8089bbc5dd6fc818b80ba05701c4a2bda..9152e90da76607b7683816c88c88358643c14055 100644
--- a/src/MNH/mean_field.f90
+++ b/src/MNH/mean_field.f90
@@ -131,8 +131,8 @@ REAL, DIMENSION(SIZE(PUT,1),SIZE(PUT,2),SIZE(PUT,3)) :: ZTHV !
 REAL, DIMENSION(SIZE(PUT,1),SIZE(PUT,2),SIZE(PUT,3)) ::  ZVOX, ZVOY, ZVOZ ! 
 REAL, DIMENSION(SIZE(PUT,1),SIZE(PUT,2),SIZE(PUT,3)) ::  ZWM ! 
 REAL, DIMENSION(SIZE(PUT,1),SIZE(PUT,2)) :: ZWORK1,ZWORK2,ZWORK3,ZWORK4,ZWORK5,ZWORK6,ZWORK7
-REAL, DIMENSION(SIZE(PUT,1),SIZE(PUT,2)) :: XCURRENT_ZON10M,XCURRENT_MER10M
-REAL, DIMENSION(SIZE(PUT,1),SIZE(PUT,2)) :: XCURRENT_TKE10M,XCURRENT_TKE20M
+REAL, DIMENSION(SIZE(PUT,1),SIZE(PUT,2)) :: ZCURRENT_ZON10M,ZCURRENT_MER10M
+REAL, DIMENSION(SIZE(PUT,1),SIZE(PUT,2)) :: ZCURRENT_TKE10M,ZCURRENT_TKE20M
 REAL, DIMENSION(SIZE(PUT,1),SIZE(PUT,2)) ::  ZMSLP ! 
 REAL, DIMENSION(SIZE(PUT,1),SIZE(PUT,2)) ::  ZUH ! 
 REAL    :: ZRV_OV_RD, ZGAMREF ! 
@@ -159,6 +159,10 @@ IKE=IKU-JPVEXT
 !*       1. MEAN
 !
 ZTEMPT = PTHT*(((PPABST)/XP00)**(XRD/XCPD))
+ZCURRENT_ZON10M = 0.
+ZCURRENT_MER10M = 0.
+ZCURRENT_TKE10M = 0.
+ZCURRENT_TKE20M = 0.
 !
 !
 IF(LUSERV) THEN
@@ -399,13 +403,13 @@ END IF
    IF ((XZHATM(JK+1) .GE. 10.) .AND. (XZHATM(JK)<10.)) THEN
     DO JJ=IJB,IJE
      DO JI=IIB,IIE
-      XCURRENT_ZON10M(JI,JJ)=PUT(JI,JJ,JK) + &
+      ZCURRENT_ZON10M(JI,JJ)=PUT(JI,JJ,JK) + &
             (PUT(JI,JJ,JK+1)-PUT(JI,JJ,JK)) * &
             (10.-XZHATM(JK))/(XZHATM(JK+1)-XZHATM(JK))
-      XCURRENT_MER10M(JI,JJ)=PVT(JI,JJ,JK) + &
+      ZCURRENT_MER10M(JI,JJ)=PVT(JI,JJ,JK) + &
             (PVT(JI,JJ,JK+1)-PVT(JI,JJ,JK)) * &
             (10.-XZHATM(JK))/(XZHATM(JK+1)-XZHATM(JK))
-      XCURRENT_TKE10M(JI,JJ)=PTKET(JI,JJ,JK) + &
+      ZCURRENT_TKE10M(JI,JJ)=PTKET(JI,JJ,JK) + &
             (PTKET(JI,JJ,JK+1)-PTKET(JI,JJ,JK)) * &
             (10.-XZHATM(JK))/(XZHATM(JK+1)-XZHATM(JK))
      END DO
@@ -414,7 +418,7 @@ END IF
    IF ((XZHATM(JK+1) .GE. 20.) .AND. (XZHATM(JK)<20.)) THEN
     DO JJ=IJB,IJE
      DO JI=IIB,IIE
-      XCURRENT_TKE20M(JI,JJ)=PTKET(JI,JJ,JK) + &
+      ZCURRENT_TKE20M(JI,JJ)=PTKET(JI,JJ,JK) + &
             (PTKET(JI,JJ,JK+1)-PTKET(JI,JJ,JK)) * &
             (20.-XZHATM(JK))/(XZHATM(JK+1)-XZHATM(JK))
      END DO
@@ -422,29 +426,31 @@ END IF
    END IF
    JK=JK+1
   END DO
-  ! Computation of the Updraft Helicity (UH) 
-  JK=IKB 
-  !CALL PRINT_MSG(NVERB_INFO,'IO', 'ZUH:') !, ZUH)
-  ZUH = 0.
-!
-  DO WHILE((XZHAT(JK+1) .LE. 5000))
-    IF (XZHAT(JK) .GE. 2000) THEN
-      DO JJ=IJB,IJE
-        DO JI=IIB,IIE
-          ZUH(JI,JJ)=ZUH(JI,JJ)+0.5*(XZHAT(JK+1)-XZHAT(JK))* &
-                     (PWT(JI,JJ,JK+1)*ZVOZ(JI,JJ,JK+1)+PWT(JI,JJ,JK)*ZVOZ(JI,JJ,JK))
+  IF (LUH_MAX) THEN
+    ! Computation of the Updraft Helicity (UH) 
+    JK=IKB 
+    !CALL PRINT_MSG(NVERB_INFO,'IO', 'ZUH:') !, ZUH)
+    ZUH = 0.
+  !
+    DO WHILE((XZHAT(JK+1) .LE. 5000))
+      IF (XZHAT(JK) .GE. 2000) THEN
+        DO JJ=IJB,IJE
+          DO JI=IIB,IIE
+            ZUH(JI,JJ)=ZUH(JI,JJ)+0.5*(XZHAT(JK+1)-XZHAT(JK))* &
+                       (PWT(JI,JJ,JK+1)*ZVOZ(JI,JJ,JK+1)+PWT(JI,JJ,JK)*ZVOZ(JI,JJ,JK))
+          END DO
         END DO
-      END DO
-    END IF
-   JK=JK+1
-  END DO
+      END IF
+     JK=JK+1
+    END DO
+  END IF
 !
   DO JJ=IJB,IJE
    DO JI=IIB,IIE
-     ZWORK1(JI,JJ) = SQRT(XCURRENT_ZON10M(JI,JJ)**2+XCURRENT_MER10M(JI,JJ)**2)
+     ZWORK1(JI,JJ) = SQRT(ZCURRENT_ZON10M(JI,JJ)**2+ZCURRENT_MER10M(JI,JJ)**2)
      ZWORK2(JI,JJ) =  4. * SQRT(PTKET(JI,JJ,IKB))
-     ZWORK3(JI,JJ) = 4. * SQRT(XCURRENT_TKE10M(JI,JJ))
-     ZWORK4(JI,JJ) = 3.8 * SQRT(XCURRENT_TKE20M(JI,JJ))
+     ZWORK3(JI,JJ) = 4. * SQRT(ZCURRENT_TKE10M(JI,JJ))
+     ZWORK4(JI,JJ) = 3.8 * SQRT(ZCURRENT_TKE20M(JI,JJ))
      ZWORK5(JI,JJ) = ZWORK1(JI,JJ) + ZWORK2(JI,JJ)
      ZWORK6(JI,JJ) = ZWORK1(JI,JJ) + ZWORK3(JI,JJ)
      ZWORK7(JI,JJ) = ZWORK1(JI,JJ) + ZWORK4(JI,JJ)
@@ -457,7 +463,7 @@ END IF
      XFF10MAX_AROME_MAX(JI,JJ) = MAX(XFF10MAX_AROME_MAX(JI,JJ),ZWORK7(JI,JJ))
      XMSLP_MAX(JI,JJ) = MAX(XMSLP_MAX(JI,JJ),ZMSLP(JI,JJ)) ! 
      XMSLP_MIN(JI,JJ) = MIN(XMSLP_MIN(JI,JJ),ZMSLP(JI,JJ)) ! 
-     XUH_MAX(JI,JJ)= MAX(XUH_MAX(JI,JJ),ZUH(JI,JJ)) ! 
+     IF (LUH_MAX) XUH_MAX(JI,JJ)= MAX(XUH_MAX(JI,JJ),ZUH(JI,JJ)) ! 
    END DO
   END DO
 !
diff --git a/src/MNH/modd_mean_field.f90 b/src/MNH/modd_mean_field.f90
index 71e59e61fc8b88edb54f2785bef8bb05501030a0..88051e0d75b12fe30e0db1fdc968cf8c7b276b55 100644
--- a/src/MNH/modd_mean_field.f90
+++ b/src/MNH/modd_mean_field.f90
@@ -49,5 +49,6 @@ IMPLICIT NONE
 
 LOGICAL :: LMEAN_FIELD          
 LOGICAL :: LCOV_FIELD          
+LOGICAL :: LUH_MAX   
 
 END MODULE MODD_MEAN_FIELD
diff --git a/src/MNH/modd_mean_fieldn.f90 b/src/MNH/modd_mean_fieldn.f90
index 324cad1ed47c225218c00f9a96a61a26e6981306..21ef8f4b7527709ad0c3c120299f4b342e533fe0 100644
--- a/src/MNH/modd_mean_fieldn.f90
+++ b/src/MNH/modd_mean_fieldn.f90
@@ -181,7 +181,7 @@ MEAN_FIELD_MODEL(KFROM)%XTKEM_MAX=>XTKEM_MAX
 MEAN_FIELD_MODEL(KFROM)%XPABSM_MAX=>XPABSM_MAX
 MEAN_FIELD_MODEL(KFROM)%XMSLP_MAX=>XMSLP_MAX !
 MEAN_FIELD_MODEL(KFROM)%XMSLP_MIN=>XMSLP_MIN !
-MEAN_FIELD_MODEL(KFROM)%XUH_MAX=>XUH_MAX !
+IF (LUH_MAX) MEAN_FIELD_MODEL(KFROM)%XUH_MAX=>XUH_MAX !
 MEAN_FIELD_MODEL(KFROM)%XWMOD10MAX_MAX=>XWMOD10MAX_MAX
 MEAN_FIELD_MODEL(KFROM)%XTKEMAX_MAX=>XTKEMAX_MAX
 MEAN_FIELD_MODEL(KFROM)%XTKE10MAX_MAX=>XTKE10MAX_MAX
@@ -240,7 +240,7 @@ XTKEM_MAX=>MEAN_FIELD_MODEL(KTO)%XTKEM_MAX
 XPABSM_MAX=>MEAN_FIELD_MODEL(KTO)%XPABSM_MAX
 XMSLP_MAX=>MEAN_FIELD_MODEL(KTO)%XMSLP_MAX !
 XMSLP_MIN=>MEAN_FIELD_MODEL(KTO)%XMSLP_MIN !
-XUH_MAX=>MEAN_FIELD_MODEL(KTO)%XUH_MAX !
+IF (LUH_MAX) XUH_MAX=>MEAN_FIELD_MODEL(KTO)%XUH_MAX !
 XWMOD10MAX_MAX=>MEAN_FIELD_MODEL(KTO)%XWMOD10MAX_MAX
 XTKEMAX_MAX=>MEAN_FIELD_MODEL(KTO)%XTKEMAX_MAX
 XTKE10MAX_MAX=>MEAN_FIELD_MODEL(KTO)%XTKE10MAX_MAX
diff --git a/src/MNH/modn_mean.f90 b/src/MNH/modn_mean.f90
index 5b39656863e21fafe1030fdeafc3c894a6ae57ca..75e7854b792bf271a8f7c5b7ef5c1b6fa52bd6fc 100644
--- a/src/MNH/modn_mean.f90
+++ b/src/MNH/modn_mean.f90
@@ -38,7 +38,7 @@ USE MODD_MEAN_FIELD
 !
 IMPLICIT NONE
 !
-NAMELIST/NAM_MEAN/LMEAN_FIELD,LCOV_FIELD
+NAMELIST/NAM_MEAN/LMEAN_FIELD,LCOV_FIELD,LUH_MAX
 !
 !
 END MODULE MODN_MEAN
diff --git a/src/MNH/write_lfin.f90 b/src/MNH/write_lfin.f90
index 95251a3d10325e9125d98fe6bd18e5eae9922e3a..81a7258895eeb135106a3a63c5a83feabcad9e79 100644
--- a/src/MNH/write_lfin.f90
+++ b/src/MNH/write_lfin.f90
@@ -1150,7 +1150,9 @@ IF (MEAN_COUNT /= 0) THEN
   CALL IO_Field_write(TPFILE,TZFIELD,XMSLP_MIN)
 !   
 !
-  TZFIELD = TFIELDMETADATA(                          &
+  ! Max updraft helicity 
+  IF (LUH_MAX) THEN
+    TZFIELD = TFIELDMETADATA(                          &
     CMNHNAME   = 'generic for mean_count variables', & !Temporary name to ease identification
     CSTDNAME   = '',                                 &
     CDIR       = 'XY',                               &
@@ -1159,12 +1161,12 @@ IF (MEAN_COUNT /= 0) THEN
     NDIMS      = 2,                                  &
     LTIMEDEP   = .TRUE.                              )
 !
-! Min and max updraft helicity 
-  TZFIELD%CMNHNAME   = 'UH_MAX'
-  TZFIELD%CLONGNAME  = 'UH_MAX'
-  TZFIELD%CUNITS     = 'm2 s-2'
-  TZFIELD%CCOMMENT   = 'X_Y_max Updraft Helicity'
-  CALL IO_Field_write(TPFILE,TZFIELD,XUH_MAX)
+    TZFIELD%CMNHNAME   = 'UH_MAX'
+    TZFIELD%CLONGNAME  = 'UH_MAX'
+    TZFIELD%CUNITS     = 'm2 s-2'
+    TZFIELD%CCOMMENT   = 'X_Y_max Updraft Helicity'
+    CALL IO_Field_write(TPFILE,TZFIELD,XUH_MAX)
+  END IF
 !   
 END IF
 !