For the next 3-8 days (ld6+2), starting with the day in question, the temperature will drop at the rate of 4 steps per day until it reaches a low point one step below the normal minimum temperature. Roll on the [[Day-to-Day Change Table]] as usual each day, but disregard the Temperature Change column for the duration of the cold wave. When the temperature drops to one step below the normal minimum, it will remain at that level for the duration of the cold wave. If the normal minimum temperature level is “1” (high of -20, low of -40), the lowest possible temperatures during the cold wave will be 10 degrees colder (high of -30, low of -50), and the cold wave will only last for at most three days after the temperature falls to this level (counting the day on which the extra-low temperatures first occur), regardless of the result of the roll for duration. When the cold wave ends, the temperature will automatically rise to the normal minimum on the first day thereafter, and will rise even higher if the [[Day-to-Day Change Table]] roll is 7 or greater. For example: It is the first month of spring in a [[Temperate]] temperate mountain region, and the temperature for the current day is "11" (on the [[Temp Code]] chart) (high of 50, low of 30). The tables indicate that a cold wave will begin on the following day, and a roll of 3 on ld6 determines that the cold wave will last for 5 days. On the following day the temperature will drop by 4 steps, to "7" (on the [[Temp Code]] chart) (high of 25, low of 10). On the second day of the cold wave, the temperature will fall only 3 more steps, to "4" (on the [[Temp Code]] chart) (high of 0, low of - 10) because this is one step lower than the normal minimum temperature at this time of year for this terrain/climate combination. The temperature will remain at level "4" (on the [[Temp Code]] chart) for two more days thereafter until the cold wave breaks. On the first day after the cold wave, the temperature will automatically climb one step, to "5". If a 7 or higher is rolled on the [[Day-to-Day Change Table]] for that day, the temperature will go up an additional 1,2, or 3 steps. If a 6 or lower is rolled, the temperature remains at level "5" (on the [[Temp Code]] chart), since this is the lowest the temperature can be under normal circumstances.