Temperature Variations and precipitation

Once you have established Погода baselines for a region and adjust them to match the elevation and season, the next step is to breathe Жизнь into the Погода by determining the temperature’s variation from the adjusted baseЛиния and the daily precipitation. With this system, you can build out Погода patterns and events as far as you want into the future. If the PCs воля be in a region for some time, it’s a Добро idea to plan out the weather’s variations and events at least a week in advance so if a character tries to Использование Выживание to predict the weather, you’ll have information to work with. On the other hand, if you know the PCs are going to be in a region for only a few days, planning our a full week of Погода isn’t necessary. And of course, you can randomly generate Погода on a day- by-Дня basis if you’re comfortable with the possibility of an unexpected turn complicating the game’s other events.

 

Temperature Variations

Погода is constantly changing, and a significant Аспект of that change is the temperature. For the purposes of this system, it’s easiest to assume that the daily temperature remains relatively static during daylight hours and then drops by 2d6+3 degrees during the night.

When setting a day’s temperature in a terrain, you can roll on the temperature variations table appropriate to the climate; the result determines how you should alter the adjusted baseЛиния temperature, and also suggests the duration of that change. You can also Использование the tables without rolling for a result, consulting them as a Проводник to help you make decisions about variations in temperature.

For terrain in a Холод region, roll on Table 4–15: Холод Region Temperature Variations. Temperature variations in this climate tРаздирать colder and last for a long period of time.

 

     CHAPTER 4     

MASTERING THE WILD

Table 4–12: Climate Baselines
Climate	Зима Temp.	Spring Temp.		Summer Temp.	Fall Temp.	Precipitation Adjustment
Cold	20º F	30º F		40º F	30º F	Decrease frequency and intensity by one step
Temperate	30º F	60º F		80º F	60º F	—
Tropical	50º F	75º F		95º F	75º F	Increase frequency and intensity by one step
Table 4–13: Elevation Baselines
Elevation	Altitude Range		BaseЛиния Temp. Adjust.		BaseЛиния Precipitation Intensity
Море level	Below 1,000 ft.		+10º F		Heavy
Lowland	1,000 ft. to 5,000 ft.		—		Средний
Highland	Above 5,000 ft.		–10º F		Средний (decrease precipitation frequency by one step)

Table 4–14: Seasonal Baselines

Холод or Temperate Climate           Tropical Climate Season Precip. Frequency  Precip. Frequency

Spring         Intermittent             Common

Summer Common                        

Intermittent Fall                       

Intermittent Common                

Зима      Rare Rare

 

For terrain in a temperate region, roll on Table 4–16: Temperate Region Temperature Variations. Temperature variations in this climate are about as likely to swing warmer or colder, and such variations tend to last for shorter periods. If you need to establish a day’s temperature for terrain in a temperate region, you can roll on Table 4–17: Tropical Region Temperature Variations. Temperature variations for tropical climates tРаздирать warm but for even shorter periods.

Table 4–15: Холод Region Temperature Variations

d%                           Variation            Duration

1–20                          –3d10° F              1d4 days

21–40                         –2d10° F             1d6+1 days

41–60                         –1d10° F             1d6+2 days

61–80                       No variation          1d6+2 days

81–95                        +1d10° F            1d6+1 days

96–99                        +2d10° F              1d4 days

100                            +3d10° F              1d2 days

 

 

Table 4–16: Temperate Region Temperature Variations

d%                           Variation            Duration

1–5                            –3d10° F              1d2 days

6–15                          –2d10° F              1d4 days

16–35                         –1d10° F             1d4+1 days

36–65                       No variation          1d6+1 days

66–85                        +1d10° F            1d4+1 days

86–95                        +2d10° F              1d4 days

96–100                       +3d10° F              1d2 days

Table 4–17: Tropical Region Temperature Variations

d%                           Variation            Duration

1–10                          –2d10° F              1d2 days

11–25                        –1d10° F              1d2 days

26–55                       No variation           1d4 days

56–85                        +1d10° F              1d4 days

86–100                       +2d10° F              1d2 days

 

Precipitation

The next step in setting the local Погода is to determine whether precipitation occurs and the intensity of that precipitation, if any.

Precipitation Frequency: Precipitation frequency is organized into five levels: drought, rare, intermittent, common, and constant. A region’s baseЛиния precipitation frequency is set by the season, but it can be modified by the climate and other factors (for example, see the Deserts sidebar on page 168). A precipitation frequency can’t be reduced lower than drought or increased higher than constant. Check each Дня to determine whether precipitation occurs for that day; the percentage chance of precipitation occurring is summarized on Table 4–18: Daily Precipitation Chances.