Fimbulwinter (spell)

Fimbulwinter
Transmutation [Cold]
Level: Cleric 9, druid 8, sorcerer/wizard 8, Winter 9
Components: V, S, XP
Casting Time: 10 minutes (see text)
Range: 1 mile/level
Area: 1 mile/level radius, centered on you
Duration: 4d12 weeks
Saving Throw: None
Spell Resistance: No
You change the weather to a state of permanent winter, or strengthen winter conditions already present. It takes 10 minutes to cast the spell and an additional 10 minutes for the effects to manifest themselves. The current, natural weather conditions are determined by the DM. You then choose what wintry conditions you want to manifest; the strength of the winter depends on the existing climate and season of the area.
Season
Possible Weather
Spring
Frequent snowfall, nightly frost
Summer
Light snow, hailstorms, cold rain, cloudy
Autumn
Frequent snowfall, frost
Winter
Frigid cold, blizzard, and constant snowfall
Daily wind and snowfall during a fimbulwinter are determined randomly; roll 1d20, add the listed modifiers for climate and season, and consult the table. Roll separately for wind and snow. The snow and wind shown are the maximum possible for the day; at your option, there can be less wind or snow.
Condition
Modifier
Cold climate
+2
Temperate climate
-2
Hot climate
-6
Winter
+8
Spring or Autumn
+4
Summer
-2
d20 Roll
Amount of Snowfall
Amount of Wind
0 or less
1d12 inches of snowfall melt
Weak (0 -10 mph)
1-5
No new snow
Weak (0-10 mph)
6-10
1d4-1 inches snow
Moderate (11-20 mph)
11-15
1d8 inches snow or 1 inch hail
Moderate (11-20 mph)
16-20
1d12 inches snow
Strong (21-30 mph)
21-25
2d12+4 inches snow
Strong (21-30 mph)
26+
1d6+1 feet of snow
Very strong (31-50 mph)
You control the general tendencies of the weather, such as the direction and intensity of the wind. When you select a certain weather condition to occur, the weather assumes that condition 10 minutes later (changing gradually, not abruptly). The weather continues as you left it for the duration, or until you use a standard action to designate a new kind of weather (which fully manifests itself 10 minutes later).
XP Cost: 100 XP.