Weather Control

Weather
Control'''
Skill: alteration/air 23
Backlash: 20
Difficulty: 12
Effect Value: 0
Bonus Number to: duration
Range: 19 (six kilometers)
Duration: 38 (one year)
Cast Time: 32 (one month)
Manipulation: duration
This is a focused spell. The magician must spend a
full month casting this spell. Each sunrise, the mage writes symbols for that
morning's weather on the perimeter of a circle with a radius of six meters. She
then alters the symbols to match the changes in the day's weather. After a
month, she has completed constructing a diagram of that month's weather, and
the pattern is formed. This allows the mage to control the weather within a 6
kilometer radius. She may change the air temperature at a rate of six degrees
per hour, and affect the humidity by six percent per hour. The changes are
sufficient to cause/stop rain in about two hours (for a moderate rainfall) and
it takes about four hours to affect (or cause) a raging storm. The magician also
may alter low and high pressure areas to "shunt" unfavorable weather patterns
away from her area.