Skip to content

Update weather.md #42

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 2 commits into from
Aug 27, 2025
Merged

Update weather.md #42

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
efed4b6
Update weather.md
matildeRivas Aug 27, 2025
0862c61
table and rg wind
fdobad Aug 27, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 1 addition & 1 deletion site/Cell2FireW/data_preparation.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -67,7 +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.
* Cell2Fire wind angle follows metereological convention, check [wind direction](weather) for more details.

<a href="#top">back to top</a>
{: style="text-align: right;"}
54 changes: 28 additions & 26 deletions site/Cell2FireW/weather.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -8,30 +8,32 @@ 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) |

How wind direction should be indicated in weather files depends of which version of the simulator or QGIS plugin you use.

## Wind direction in Cell2FireW version 1.0.0 or greater

Following the <b>meteorological standard, wind direction is indicated by the direction from which the wind originates</b>. For example, a north or northerly wind blows from the north to the south. The wind direction is measured in degrees, from 0º to 360º, rotating clockwise in the horizontal plane.

<div style="text-align: justify;">
<table>
<tr>
<td style="text-align: center;"><img src="img/meteo_angulos.png" alt="meteo" width="50%"></td>
<td style="text-align: center;"><br>Values close to 0º and 360º indicate north wind<br>90º indicate east wind<br>180º south wind<br>270º west wind.</td>
</tr>
</table>
</div>

## Wind direction in Cell2FireW versions prior to 1.0.0

In previous versions of Cell2FireW, the wind direction was dictated by the direction <b>towards</b> which the wind is blowing.
It is also measured in degrees from 0° to 360°, rotating clockwise in the horizontal plane, but 0° means "South".

<div style="text-align: justify;">
<table>
<tr>
<td style="text-align: center;"><img src="img/Cell2Fire_angulos.png" alt="meteo" width="50%"></td>
<td style="text-align: center;"><br>Values close to 0º and 360º indicate south wind<br>90º indicate west wind<br>180º north wind<br>270º east wind.</td>
</tr>
</table>
</div>