SimRacing Weather Forecast - Swedish Sim Racers
How to interprate the weather-forecast Below follows a description of how the weather-forecast shall be interpreted.
The following weather forecast will be used as an example in the explenations below:
"Before the race light rain. During the race mostly light rain, some heavy rain and no chance for dry weather. The average temperature will be around 18 degrees but with big temperature changes."

The weather forecast consists of 6 parts.


The first part describes the track wetness when the race starts.

"Before the race light rain" means that the track will be a little wet when the race starts.
The possible descriptions for the first part are:
  • "No rain" = The track wont be wet at all
  • "Light rain" = The track will be a little wet
  • "Heavy rain" = The track will be wet
  • "Thunderstorms" = The track will be flooded

The second part describes what weather type that will be most common during the race.

If it is raining more than half of the race, the rain type that occures the most is presented here. If the weather is dry most of the race, the dry weather type is presented here. "Mostly light rain" means that it will rain more than 50% of the race, and that the most common weather type will be light rain.
The possible descriptions for the second part are:
Dry weather types
  • "Sunny" = The sun will shine
  • "Cloudy" = There will be clouds
Rainy weather types
  • "Light rain" - light rain will fall
  • "Heavy rain" - heavy rain will fall
  • "Thunderstorms" - it will rain very heavily

The third part will describe the worst weather that will occure.


If the 6-range weather report is used, it will also tell a bit of the amount of rain that will occure. If the amount of rain will be between 1-30% the term "a little rain" wil be used. If the amount of rain is between 20-50% the term "some rain" will be used.
"Some heavy rain" means that the worst weather that will occure during the race will be heavy rain and that there will be rainy for 20-50% of the race.
"a little light rain" means that the worst weather that will occure during the race will be light rain and that there will be rainy for 1-30% of the race.

If the 4-range weather report is used, the term "some" will be used an this part will only inform of the type of the worst weather that will occure.
"Some heavy rain" means that the worst weather that will occure during the race will be heavy rain.

The possible descritions are:
  • "No chance of rain"
  • "Some clouds"
  • "Risk of some light rain"
  • "Some light rain"
  • "Some heavy rain"
  • "Some thunderstorms"
  • "Risk of a little light rain"
  • "A little light rain"
  • "A little heavy rain"
  • "A little bit of thunderstorms"

The fourth part will describe the best weather that will occure.

If the 6-range weather report is used, it will also tell a bit of the amount of dry weather that will occure. If the amount of dry weather will be between 1-30% the term "a little" will be used. If the amount of dry weather is between 20-50% the term "some" will be used.
"Some sun" means that the best weather that will occure during the race will be sunshine and that there will be dry weather for 20-50% of the race.
"a little dry weather" means that the best weather that will occure during the race will be cloudy and that there will be dry weather for 1-30% of the race.

If the 4-range weather report is used, the term "some" will be used an this part will only inform of the type of the best weather that will occure.
"Some sun" means that the best weather that will occure during the race will be sunshine.

The possible descriptions are:
  • "Some sun"
  • "Some dry weather"
  • "A chance of some dry weather"
  • "No chance of dry weather"
  • "A little sun"
  • "A little dry weather"
  • "A chance of a little dry weather"
Since the weather changes in GTR2 are linear between the different weathers described, all the weather types in between the best weather (third part) and the worst weather (fourth part) will occure during the session.


Fifth and sixth parts - temperature

The fifth part describes what the average teperature will be during the race, for example "The average temperature will be around 18 degrees".
The sixth part describes the temperature changes that will occure during the race. What it does NOT tell is if the temperature changes will be towards a rising temperature, a decresing temperature, or both.
The possible descriptions here are:
  • "Minor" = at most 3 degrees change from average
  • "Modest" = at most 8 degrees change from average
  • "Big" = at most 14 degrees change from average
  • "Huge" = more than 14 degrees change from average

Weatherfile values used

The following information is usefull if you want to create your own weather-file to train with using the information in the forecast.

Weather before the race(OnPathWetness):
No rain before the race: 0
Light rain before the race: 0.01 - 40.00
Heavy rain before the race: 40.01 - 75.00
Thunderstorms before the race: 75.01 - 100

Weather during the race (Conditions):
Sunny weather = 0 - 64.99
Cloudy weather = 65.0 - 70.99
Light rain = 71.0 - 80.99
Heavy rain = 81 - 90.99
Thunderstorms = 91 - 100.99 Rain risk/Dry chance = 67.0 - 75.0
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