REX 6 - Weather Force 2020


By utilizing inter-process communication with the simulator via fine granular control, you will experience automated, dynamic, and smooth weather transitions from real-world reporting metar stations. It also includes a wide range of proprietary dynamic, changing (non-static) weather presets.

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REX Weather Force is available for the new Microsoft Flight Simulator.

Compatible with Microsoft Flight Simulator - Sim Update 7

Weather Force Header Graphic

Weather Force is the NEW metar-based dynamic real-time weather engine for Microsoft Flight Simulator.

By utilizing inter-process communication via fine granular control, you will experience automated and dynamic weather transitions from real-world reporting metar stations.

Weather Force also includes a wide range of proprietary dynamic (non-static) weather presets. These presets are unlike other 'static' weather presets because they grow, dissipate and change over time! 


With real-time metar data as the foundation, the Weather Force weather engine provides a more realistic weather experience. 


– The metar data is updated 6x an hour and downloaded directly from NOAA and can provide accurate results within a 1/8th mile of a given point.

– Weather Force utilizes uniquely built algorithms to combine both metar and model data to cover sparse areas such as deserts and oceans.

– The GFS (Global Forecast System) Model data is downloaded twice daily from NCEP and provides key atmospheric conditions to give a snapshot of temperature and winds aloft.



Remarkably Unique

Weather Force reads remarks provided with live metar reports to determine if storms are near the aerodrome. Thus, even if the automated metar may indicate clear conditions, if remarks indicate storms nearby, storms will be generated near the reporting station as in real life.



Powerful Weather Search

If you are looking to fly at a particular location or in certain weather conditions, Weather Force includes a handy weather search feature that allows you to search by airport or by weather criteria.


Dynamic Changing Weather Presets

To add even more weather interest, Weather Force includes dynamic weather presets (DWP). These presets are dynamic providing various elements of changing weather over the course of your flight. Examples provided are; fair weather, approaching cold front, approaching warm front, hot and humid summer, lake effect snows, winter storm, crisp winter, breezy, spring showers, blizzard, thunderstorm, rainy day and Bob Ross Happy Clouds.

REX periodically adds new and exciting presets, which is automatically added to your application without the need to update Weather Force.




Tracking The Weather

In Weather Force you have the ability to easily track your 10 favorite airports, therefore, clearly identifying what the detailed weather is like at each. If you require a more detailed report, simply click on the ICAO and receive in-depth data about the airport weather conditions.


Simple to use UI

Friendly Simple Application User Interface 


Aircraft flying through beautiful clouds

Behind The Scenes

The Goal – With Microsoft Flight Simulator, we have been provided a powerful weather system as a start. The goal is to provide a more robust weather environment. We have worked diligently to render the weather as it should be, yet stay true to the validity of real-world metar data.

Smoothing Mechanism – In addition, the REX developers have carefully added a smoothing mechanism to the engine to gradually smooth and transition the weather over time between updates. Of course, you have complete control over the weather update factors as well as transition speed.


REX Weather Force Smoothing Mechanism During Weather Transition  

Weather Accuracy Check



Sample of correct metar representation from REX


Sample of correct metar representation from REX


Sample of correct metar representation from REX


Sample of correct metar representation from REX


Beautiful cloudy day with the new REX Weather Force weather engine in Microsoft Flight Simulator

Continued and Consistent Development

The REX developers are dedicated to continuously develop and update Weather Force as new API’s become available from Asobo and Microsoft, thus they have developed an implementary system to deliver program updates quickly and easily to you. 

The following is a list of updates coming:


Support for historic / archive weather data.


Support for personal and community weather presets.


Full featured flight center and mapping system.

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Refund Policy


No refund, credit or replacement of any kind is available for download products. It is your responsibility to transfer your purchased download products from our servers to your computer. Considering the technical nature of the internet, REX Game Studios will make every effort to resolve any issues you may have while attempting to download your products to ensure successful delivery.

Minimum System Requirements


Flight Simulator:
Microsoft Flight Simulator (Build:

Windows Operating System:
Windows 10, Windows 11 

RAM Memory:
16GB or higher

Hard Drive Space:

NVIDIA GTX 770 | AMD Radeon RX 570 

Internet Connection:
Required for installation, registration, and operation

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