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<blockquote data-quote="JamesDJarvis" data-source="post: 2335377" data-attributes="member: 2515">You don't need rain to have weather.&nbsp; Variations in wind speed alone and pressure alone would produce differences in an environnment.&nbsp; Not much fun but still weather.&nbsp; Changes in pressure will&nbsp; cause changes in temperature (and vice versa). One air mass moving at a different speed compared to another air mass will also casue changes in pressure. when water gets involved weather is more fun.The further a land mass is from a large body of open water the more likely it is to be dry.How much water do you need for percipitation?&nbsp; The answer really only has to be some.&nbsp; If atmospheric pressure and temperature allow for there to be free standing water there is going to be evaporation, if there is evaporation the water vapor will eventually collect and form clouds which will result in rain. Large bodies of water also serve to warm nearby land masses.&nbsp; The further you get from the water the more likely it is to be colder.&nbsp; Some glaciated regions of earth are effectively deserts made out of water because there is seldom any percipitation to speak of because what little there is adds to the glacier and doesn't&nbsp; reenter the environment as free water for some time.Have&nbsp; a world without too much water and i'd say you'd have perdictable rain (not too much&nbsp; and not very often) with the seasons and time of day with an occasional surprise. Much like occurs in some desert regions here on earth.</blockquote>

[QUOTE="JamesDJarvis, post: 2335377, member: 2515"] You don't need rain to have weather. Variations in wind speed alone and pressure alone would produce differences in an environnment. Not much fun but still weather. Changes in pressure will cause changes in temperature (and vice versa). One air mass moving at a different speed compared to another air mass will also casue changes in pressure. when water gets involved weather is more fun. The further a land mass is from a large body of open water the more likely it is to be dry. How much water do you need for percipitation? The answer really only has to be some. If atmospheric pressure and temperature allow for there to be free standing water there is going to be evaporation, if there is evaporation the water vapor will eventually collect and form clouds which will result in rain. Large bodies of water also serve to warm nearby land masses. The further you get from the water the more likely it is to be colder. Some glaciated regions of earth are effectively deserts made out of water because there is seldom any percipitation to speak of because what little there is adds to the glacier and doesn't reenter the environment as free water for some time. Have a world without too much water and i'd say you'd have perdictable rain (not too much and not very often) with the seasons and time of day with an occasional surprise. Much like occurs in some desert regions here on earth. [/QUOTE]

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