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GM Screen
Mastering the Wild
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Weather in the Wilderness
/
Weather Details
Wind
Source
Ultimate Wilderness pg. 170
Once you’ve generated the day’s precipitation, you’ll need to establish the wind strength unless the precipitation indicates otherwise. For example, on foggy days, no significant wind occurs, while thunderstorms have their own rules for determining wind strength. To set the wind strength for the day, roll d% and consult the table below.
Table 4-28: Wind Strength
d%
Wind Strength
Wind Speed
Ranged Weapon Penalty/Siege Weapon Penalty
Check Size
Blown Away Size
Skill Penalty
1-50
Light
0-10 mph
—/—
—
—
—
51-80
Moderate
11-20 mph
—/—
—
—
—
81-90
Strong
21-30 mph
-2/—
Tiny
—
-2
91-95
Severe
31-50 mph
-4/—
Small
Tiny
-4
96-100
Windstorm
51+ mph
Impossible/-4
Medium
Small
-8
Wind Strength
: This is the category of the wind strength.
Wind Speed
: This is the range of wind speeds that occur. Wind speed typically fluctuates between these values through the period of the day, and for moderate or higher wind strength, there are periods in the day when the wind speed dips below the listed range.
Ranged Weapon Penalty/Siege Weapon Penalty
: These are the penalties that characters take when firing ranged weapons and siege weapons in wind of the listed strength. In windstorm-strength wind, normal ranged weapon attacks (either projectile or thrown) are impossible. This includes ranged attacks made via spells of the conjuration school, but it does not include evocation ranged attacks. Siege weapons include all weapons of that type and boulders thrown by giants and other creatures with the rock throwing special attack.
Check Size
: Creatures of the listed size or smaller are unable to move forward against the force of the wind unless they succeed at a DC 10 Strength check (on the ground) or a DC 20 Fly check if airborne.
Blown Away Size
: Creatures of the listed size on the ground are knocked prone, roll 1d4×10 feet, and take 2d6 points of nonlethal damage, unless they succeed on a DC 15 Strength check. Flying creatures of the listed size are blown back 2d6×10 feet and take 2d6 points of nonlethal damage due to battering and buffeting, unless they succeed at a DC 25 Fly check.
Skill Penalty
: This is the penalty for skill checks that can be affected by the wind. These penalties always apply on Fly checks and sound-based Perception checks, but GMs may also wish to apply them on Acrobatics checks, Climb checks, and any other ability or skill checks that could be adversely affected by winds.