Hârn Venârivè Appendix XVII Weather
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Contents
Appendix XVII: Weather
Note: Venârivè 217 to 232
- Venârivè 217
Weather is complicated to simulate accurately. Over an area as large as that covered by Venârivè there are far too many climate zones and local weather patterns to sum up in any reasonable number of charts or lookup tables.
We have, however, provided base weather charts for the major climate zones, and some exemplar ‘location-specific’ weather charts. We plan to provide more such charts for important locations, and include them in future publications.
Approaches to determining the weather
There are several approaches to determining the appropriate weather.
Gamemaster determines the weather
The Gamemaster is the final arbiter of the weather at any particular location or time. The Gamemaster may chose to use the tools provided here, in part or as a whole, but may simply determine the weather required by plot or story. If the story requires that it rains, then it should rain.
Gamemasters can also make use of the precipipation layers on the Venârivè map in determining weather results in this manner.
Use the base weather charts
The base weather charts provide a reasonable approximation of the weather conditions across the broad climate zones. They are, of course, imperfect, as they do not (by themselves) take account of local conditions. But as a guide to Gamemaster decision making, they are certainly useful.
Use a location-specific weather chart
We have included four examples of location-specific weather charts in this publication - one for Ázadmêre, one for Énselet in Shôrkýnè, one for the region around Isýnen on the northern coast of Hèpekéria, and one for the city of Ubárian in Tríerzòn.
Future publications will include additional location specific charts, and we will make others available for download.
Develop a location-specific weather chart
Finally, we also plan to provide Gamemasters with the tools to develop their own ‘location-specific’ charts, using a range of optional rules. This will be available as a download from Kelestia.com.
It is entirely up to each Gamemaster and gaming group which approach they take to determining the weather in Venârivè. We hope we have provided sufficient options to meet the needs of all groups.
Climate Zones
- Venârivè 218
Note: ADD Köppen climate classification schemes to each Climate and other data.
A Gamesmaster can use the descriptions below to determine the weather for each of the six principal climate zones across Venârivè as shown on the maps on page 222, which also indicate precipitation levels. A base weather chart is also provided for each of these climate zones. Finally, Gamesmasters can also make some assumptions about the climate zone if they know the predominant vegetation type for an area.
Subpolar
The Subpolar climate zone generally occurs at latitudes from 50 to 60 degrees. The predominant vegetation in this climate zone is needleleaf forests and the prevailing wind direction is southwesterly, shifting to northerly in winter. The subpolar zone is characterized by cold winters and a short, cool summer. Regions with this climate include northeastern Ivínia, Áltôr, and northern Mengóla.
Cool Temperate
The Cool Temperate climate zone is one of the most varied usually occupying regions between latitudes 35 and 55 degrees. Though the prevailing winds are southwesterly, they often shift. They carry warm moist air that frequently makes coastal regions cloudy with cool damp summers and mild wet winters. Cool temperate coastal regions of Venârivè include Hârn, southwestern Ivínia, Hârbáal, Huriséa, and Shôrkýnè where the predominant vegetation is deciduous forests, with occasional temperate rain forests. Further inland the winters are cold and summers are hot, with less precipitation. Regions with this climate include Quârphor, parts of Reksýna, as well as northern Tríerzòn and eastern Ûmélria. These are characterised by deciduous forests.
Finally, where a mountain range separates a region from the moist south westerlies of the cold temperate zone there is very much less rain. This is broadly true of the remaining parts of Reksýna and of Ketârh where the climate and dry winds favour large expanses of grass with small stands of scrub and bushes.
Warm Temperate
The Warm Temperate climate zone generally occurs between 25 and 40 degrees of latitude and is dominated by moist southwesterly winds. Occasional storms introduce significant variation in wind direction during summer when they tend to be southerly. Winters, by contrast, are much calmer and mild with occasion freezes compared to hot and humid summers. This climate characterises Emélrenè, Palíthanè, central Tríerzòn, northern Ázeryàn, and Ûmélria western where the predominant vegetation is deciduous forests with some tropical evergreens.
Subtropical
The Subtropical climate zone generally occurs between 15 and 35 degrees of latitude. Prevailing northwesterly winds shift and strengthen to moist south westerlies at the end of the autumn making winters mild but rainy. They shift again to weaker south easterlies in the spring before north easterly winds herald hot and dry summers. Regions with this climate include southern Tríerzòn, southwestern Ázeryàn, northern and eastern Hèpekéria, Karéjia, coastal Býria, and the eastern Venârian. The predominant vegetation is evergreen hardwood and scrub except where rain shadowing produces a much drier habitat such as the Àzeryáni Drylands.
Tropical (Dry)
The Dry Tropical climate zone generally occurs between 5 and 25 degrees of latitude. Prevailing winds are northeasterlies except in winter when they shift to northerlies. Where they are dry in winter and wet in summer the predominant vegetation is a savannah of grass with clumps of trees and brush. Relatively stable weather is disturbed by occasional violent tropical storms during the summer and autumn. Regions with this climate include Tuvâra, Péchalâr, Falânia and northern Thónia.
Where the winds are dry all year round due to the geography of a region there is very little precipitation. Warm winters and extremely hot summers produce sand deserts or drylands of hardy cactus and scrub. Regions with this climate include the Hèpekérian interior and the Béshakan desert.
Tropical (Wet)
The Wet Tropical climate zone generally occurs between 0 and 10 degrees of latitude. The regions accessible from Venârivè have prevailing northwesterly winds but seasonal variation and geography can produce pronounced wet and dry seasons as when the winds shift to southwesterlies in summer. The predominant vegetation is dense rain forest such as cover much of Mafán, Chogôro, and southern Thónia.
Variation in Prevailing Wind Direction
While the overall prevailing wind directions for each climate zone are given here, local wind conditions can and do vary. The most significant of these are indicated on the Venârivè map, and included on the map on page 222.
Future location-specific weather charts will adjust for these local wind conditions; but Gamemasters should feel free to make their own adjustments.
Overview of the Weather Charts
- Venârivè 219
Each weather chart takes the form of four, seasonal, columns, each of twenty boxes. In each box is a set of symbols that describe the weather for a single watch of four hours; see Units of Time (page 67). Each box on the weather chart has the following symbols:
INSERT TABLE
| Temperature | |
| Cloud Cover | and Precipitation |
| 3 Columns | 2 Rows |
| Cold (Cool) | N 1-3 |
| Û | d4 |
| Wind Direction | and Force |
| Weather Change | Die-Type |
Temperature (Day and Night)
The weather charts indicate the temperature for each watch. The first temperature indicated applies during the day, the second (in parentheses), at night: thus, Warm (Cool).
The temperatures indicated are subjective but ‘feel like’ the following temperature ranges:
- Sweltering (Swlt) – 35 °C (95 °F) or more; dangerous without shade and water.
- Hot (Hot) – 26 to 35 °C (79 to 95°F).
- Warm (Warm) – 16 to 25 °C (61 to 77°F).
- Cool (Cool) – 10 to 15 °C (50 to 59°F).
- Cold (Cold) – 1 to 10 °C (34 to 50°F); unpleasant, warm coverings required.
- Freezing (Frzg) – 0°C (32°F) or less; dangerous if individuals are unprotected.
Wind Direction and Windforce
The letter (NW, N, NE, SE, S, and SW) indicates the main direction from which the wind blows during the watch. The direction relates to the hex-edge. Each entry provides a range for windforce: 0‑2, 1-3, or 2-4.
INSERT TABLE
| Windforce Interpretation Table |
| Force Effect Km / hr |
| 0 Calm / |
| Light Breeze |
| Leaves rustle 0-8 |
| 1 Moderate |
| Breeze |
| Small branches |
| move |
| 8-24 |
| 2 Strong |
| Wind |
| Large branches |
| move |
| 24-48 |
| 3 Gale Branches break |
| off trees |
| 48-88 |
| 4 Storm Trees uprooted 88+ |
Cloud and Precipitation Symbols The following are the types of cloud cover and precipitation indicated on the weather charts:
INSERT TABLE
| Symbol Cloud and Precipitation Type |
| Õ Clear, Dry |
| × Cloudy, Dry |
| Ø Cloudy, Showers |
| Ù Overcast, Dry |
| Ú Overcast, Snow / Hail Showers |
| j Overcast, Continuous Snow |
| Û Overcast, Showers |
| Ý Overcast, Continuous Rain |
| ß Foggy or Misty (Windforce 0 only) |
| Ü Cloudy, Thunderstorm |
Clear - means less than 25% cloud cover
Cloudy - means between 25% and 75% cloud cover
Overcast - means more than 75% cloud cover
Weather Change Die-Type
Each watch (4 hour period), the box used may change according to a die roll, and will tend, on average, to cycle around the chart.
Each box in the weather chart indicates the die-type which should be rolled to determine if there is to be a change in the weather from watch to watch. The possible die-types are:
INSERT TABLE
| d4 four-sided die |
| d6 six-sided die |
| d8 eight-sided die |
| d10 ten-sided die |
| d12 twelve-sided die |
A
- A
INSERT TABLE
Base Weather Charts
- Venârivè 220
One base chart is given in the following pages for each of several climate zones. This represents a location in the selected climate zone at a low elevation without rain shadow or slope. They are not adjusted for elevation or local shifts in prevailing winds.
Using the Base Weather Charts
For a weather report when the previous watch’s weather is unknown the Gamemaster can roll 1d20 and place a marker on the chart for the appropriate zone and season in the numbered box indicated by the roll. Alternatively they can begin with the grey box which indicates the ‘most likely starting point’ for weather where the situation in the preceding watch isn’t known.
As noted above, each box on the weather charts indicates the die-type that should be rolled to determine weather changes. Once the box for the first watch is identified the Gamemaster rolls the die-type indicated to test if the weather changes, and in what direction, up or down the table. The weather change table below shows how the die roll is interpreted:
INSERT TABLE
| Weather Change Table |
| Roll Weather Changes |
| 1 Move up 1 box |
| 2 Move down 2 boxes |
| 3 - 4 Move down 1 boxes |
| 5+ No Change (same box) |
This means that higher die-types will tend to result in more stable weather; lower die-types indicate a propensity for more rapid changes in weather from watch to watch.
If the marker moves off the chart, re-enter at the other end. If the climate zone or season changes, switch columns or charts without shifting the box number.
Interpreting Weather Chart Results
Gamemasters can interpret weather generated by either base or location-specific charts, and add detail as described below.
Actual Windforce
Actual windforce in across the ranges indicated on the weather charts (0-2, 1-3, and 2-4) can be determined roling 1d10 on the following table :
INSERT TABLE
| Range Roll 1d10 |
| 0-2 roll 1-4 = 0 roll 5-8 = 1 roll 9-10 = 2 |
| 1-3 roll 1-5 = 1 roll 6-8 = 2 roll 9-10 = 3 |
| 2-4 roll 1-6 = 2 roll 7-9 = 3 roll 10 = 4 |
Variable Precipitation (optional)
Precipitation is generally considered to be rain, by default, but differing temperature ranges may give a chance for different results:
INSERT TABLE
| Cool 10% chance of hail in cool temperate, |
| spring or fall |
| Cold Rain (20%), sleet (40%), hail (10%), or |
| snow (30%) |
| Freezing Snow (50%), sleet (30%), or |
| hail / ice fall (20%) |
Chance of Showers (Optional)
Continuous precipitation (rain or snow) is constant through the watch, but rain or snow showers can optionally start on a roll of 1 or 2 on a d6 and stop on a roll of 5 or 6. The Gamemaster can roll every 15 minutes to every hour, as it suits them, but the interval chosen should be consistent to avoid weather that appears entirely unpredictable to players.
Venârivè Map Precipitation Levels (Optional)
The Venârivè map includes layers (one using colours, the other overlay symbols) which provide indicative data on precipitation levels across the region, which can be used to interpret the weather in a given location:
INSERT TABLE
| A |
| Colour Symbols |
| < 10 inches p.a. |
| 10-20 inches p.a. |
| 20-40 inches p.a. |
| 40-80 inches p.a. |
| 80+ inches p.a |
Gamemasters should feel free to adjust the
precipitation generated from the base weather charts
to ensure a better fit with the indicated precipitation
levels on the map.
A more detailed system for ensuring better fit with indicated precipitation levels will be provided in the full weather system, for those Gamemasters who wish to use it.
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- Venârivè 221
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- Venârivè 222
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- Venârivè 223
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- Venârivè 224
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- Venârivè 225
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- Venârivè 226
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- Venârivè 227
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- Venârivè 228
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- Venârivè 229
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- Venârivè 230
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- Venârivè 231
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- Venârivè 232
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Köppen climate classification scheme symbols description table
| 1st | 2nd | 3rd | Description | ||
|---|---|---|---|---|---|
| A | f | Tropical | Rainforest | ||
| m | Monsoon | ||||
| w | Savanna, Wet | ||||
| s | Savanna, Dry | ||||
| B | W | Arid | Desert | ||
| S | Steppe | ||||
| h | Hot | ||||
| k | Cold | ||||
| n | Mild | ||||
| C | s | Temperate | Dry summer | ||
| w | Dry winter | ||||
| f | Without dry season | ||||
| a | Hot summer | ||||
| b | Warm summer | ||||
| c | Cold summer | ||||
| D | s | Cold (continental) | Dry summer | ||
| w | Dry winter | ||||
| f | Without dry season | ||||
| a | Hot summer | ||||
| b | Warm summer | ||||
| c | Cold summer | ||||
| d | Very cold winter | ||||
| E | T | Polar | Tundra | ||
| F | Eternal winter (ice cap) | ||||
Note: {|class="wikitable floatright"
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Notes
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