diff --git a/README.md b/README.md
index 1f05be6..d32234a 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,7 @@ sudo apt-get install ruby-full ruby-bundler jekyll build-essential
 ```
 #### build
 ```
-cd <repo/root>
+cd <repo/root>/site
 bundle config set --local path 'vendor/bundle'
 bundle install
 ```
diff --git a/site/Cell2FireW/data_preparation.md b/site/Cell2FireW/data_preparation.md
index 1dc5497..6971eaf 100644
--- a/site/Cell2FireW/data_preparation.md
+++ b/site/Cell2FireW/data_preparation.md
@@ -67,6 +67,7 @@ Scott&Burgan
 * FireScenario was deprecated by "Live & Dead Fuel Moisture Content Scenario [1=dry..4=moist]"
 * There's no need to be consistent with the timestamps, but isoformat `YYYY-MM-DDTHH:MM:SS` should be followed
 * WIP: unifying weather formats, relying on column names instead of order to read them
+* Cell2Fire wind angle is reversed from normal metereological data, check [wind direction](weather) for more details.
 
 <a href="#top">back to top</a>
 {: style="text-align: right;"}
diff --git a/site/Cell2FireW/get.md b/site/Cell2FireW/get.md
index d55b83e..39691fa 100644
--- a/site/Cell2FireW/get.md
+++ b/site/Cell2FireW/get.md
@@ -2,7 +2,7 @@
 layout: default
 title: Get it
 parent: Cell2FireW simulator
-nav_order: 2
+nav_order: 3
 has_children: false
 has_toc: false
 ---
diff --git a/site/Cell2FireW/img/Cell2Fire_angulos.png b/site/Cell2FireW/img/Cell2Fire_angulos.png
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diff --git a/site/Cell2FireW/img/meteo_angulos.png b/site/Cell2FireW/img/meteo_angulos.png
new file mode 100644
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diff --git a/site/Cell2FireW/weather.md b/site/Cell2FireW/weather.md
new file mode 100644
index 0000000..54a0599
--- /dev/null
+++ b/site/Cell2FireW/weather.md
@@ -0,0 +1,37 @@
+---
+layout: default
+title: Wind direction
+parent: Cell2FireW simulator
+nav_order: 2
+has_children: false
+has_toc: false
+---
+
+# Wind direction 
+
+Wind direction is generally indicated by the direction from which the wind originates. For example, a north or northerly wind blows from the north to the south.
+
+## Wind direction in meteorology
+
+It is measured in degrees, from 0º to 360º, rotating clockwise in the horizontal plane. 
+
+* Values close to 1º and 360º indicate north wind
+* 90º indicate east wind
+* 180º south wind
+* 270º west wind.
+
+## Wind direction Cell2Fire
+
+In Cell2Fire, the wind is also measured in degrees from 0° to 360°, rotating clockwise in the horizontal plane.
+
+* Values close to 0° or 360° indicate south wind
+* 90° indicate west wind
+* 180° north wind
+* 270° east wind 
+
+
+| Metereological | Cell2FireW | 
+| --- | --- |
+| ![meteo](img/meteo_angulos.png)| ![angulos](img/Cell2Fire_angulos.png)  |
+
+