diff --git a/Environment/metarinterpolator.xml b/Environment/metarinterpolator.xml
index 375eb7744..ecd685e9b 100644
--- a/Environment/metarinterpolator.xml
+++ b/Environment/metarinterpolator.xml
@@ -419,13 +419,23 @@
       <condition>
         <property>/environment/params/metar-updates-snow-level</property>
         <property>/environment/params/metar-updates-environment</property>
+        <property>/environment/metar/snow-cover</property>
+        <property>/environment/metar/valid</property>
+        <less-than>
+          <expression>
+            <difference> 
+              <product>
+                <property>/environment/metar/station-elevation-ft</property>
+                <value>0.3048</value>
+              </product>
+              <property>/environment/snow-level-m</property>
+            </difference>
+          </expression>
+          <value>0</value>
+        </less-than>
       </condition>
     </enable>
     <input>
-      <condition>
-        <property>/environment/metar/valid</property>
-        <property>/environment/metar/snow-cover</property>
-      </condition>
       <expression>
         <sum>
           <product>
@@ -438,6 +448,7 @@
     </input>
     <input>3200</input>
     <output>/environment/snow-level-m</output>
-    <max>3200</max>
+    <min>-425</min>
+    <max>7500</max>
   </filter>
 </PropertyList> 
diff --git a/gui/dialogs/environment-settings.xml b/gui/dialogs/environment-settings.xml
index bfbe35d7a..de8c19c9a 100644
--- a/gui/dialogs/environment-settings.xml
+++ b/gui/dialogs/environment-settings.xml
@@ -93,7 +93,7 @@
       <col>0</col>
       <colspan>4</colspan>
       <halign>left</halign>
-      <label>Set snow level from METAR</label>
+      <label>Set maximum snow level from METAR</label>
       <name>metar-snow</name>
       <property>/environment/params/metar-updates-snow-level</property>
       <binding>