diff --git a/Environment/environment.xml b/Environment/environment.xml
index 43b58c35c..3ba8eca20 100644
--- a/Environment/environment.xml
+++ b/Environment/environment.xml
@@ -38,6 +38,12 @@
         <tile-management>METAR</tile-management>        
       </local-weather>
     </scenario>
+    <scenario>
+      <id type="string">isa</id>
+      <name type="string">International Standard Atmosphere</name>
+      <metar type="string">XXXX 012345Z 00000KT 19SM SKC 15/M99 Q1013 NOSIG</metar>
+      <description type="string">A standard atmosphere model for testing and calibrating aircraft performance and design.</description>
+    </scenario>
     <scenario>
         <id type="string">core-high-pressure-region</id>
       <name type="string">Core high pressure region</name>
diff --git a/Input/Keyboard/multikey.xml b/Input/Keyboard/multikey.xml
index 5c2eec52d..f8a1a7137 100644
--- a/Input/Keyboard/multikey.xml
+++ b/Input/Keyboard/multikey.xml
@@ -320,6 +320,17 @@
 					</binding>
 				</key>
 
+				<key n="105">
+					<name>i</name>
+					<desc>Weather Scenario = International Standard Atmosphere</desc>
+					<binding>
+						<command>nasal</command>
+						<script>
+							set_weather_scenario_multikey("International Standard Atmosphere");
+						</script>
+					</binding>
+				</key>
+
 				<key n="72">
 					<name>H</name>
 					<desc>Weather Scenario = Core high pressure region</desc>
diff --git a/Translations/default/weather-scenarios.xml b/Translations/default/weather-scenarios.xml
index f9414e297..0be9fdacf 100644
--- a/Translations/default/weather-scenarios.xml
+++ b/Translations/default/weather-scenarios.xml
@@ -9,6 +9,8 @@ in that script. -->
   <live-data-desc>Fetch live weather data for your nearest airport from noaa.gov. You need a working internet connection. Weather is generated automatically, once a valid METAR is received.</live-data-desc>
   <manual-input-name>Manual input</manual-input-name>
   <manual-input-desc>Enter your favorite METAR weather. A valid METAR syntax is required.</manual-input-desc>
+  <isa-name>International Standard Atmosphere</isa-name>
+  <isa-desc>A standard atmosphere model for testing and calibrating aircraft performance and design.</isa-desc>
   <core-high-pressure-region-name>Core high pressure region</core-high-pressure-region-name>
   <core-high-pressure-region-desc>The center of a high pressure region, characterized by descending air and hence only weak cloud development with high visibility.</core-high-pressure-region-desc>
   <high-pressure-region-name>High pressure region</high-pressure-region-name>