If a character selects the weather, he can choose any relatively normal condition. He cannot pick: tornado, thunder blizzard, etc.
If the weather is random, the following chart will be used:
1-45 Clear
46-75 Overcast
76-85 Precipitation
86-90 Heavy Precipitation
91-93 Windstorm
94-97 Extreme Temperature
98-100 Fog
Thoughts?