2006-07-31 03:36:02 · 9 answers · asked by laurie r 2 in Science & Mathematics ➔ Weather
The temp is not low enough for condensation to outweigh evaporation.
2006-07-31 03:42:32 · answer #1 · answered by ag_iitkgp 7 · 2⤊ 0⤋
humidity measures moisture in the air. But it can be raining without 100 percent humidity. And, the humidity can measure 100 percent without it raining. For clouds to form and rain to start, the air does have to reach 100% relative humidity, but only where the clouds are forming or where the rain is coming from. Often, rain will be falling from clouds where the humidity is 100% into air with a lower humidity. Some water from the rain evaporates into the air it's falling through, increasing the humidity, but usually not enough to bring the humidity up to 100%. When air is saturated, or 100% humidity, rain may or may not form, since it takes more than saturated air to make rain. Rain actually forms from two processes. In one case, the drops simply collide with one another until they are big and heavy enough to cease being suspended in air and they fall to the ground. The air may be completely saturated, but the drops are so small that they may remain suspended in the air and not fall as rain. This is one reason why not all clouds produce rain. In thick fog, the humidity is usually 100 percent, but the fog droplets are so small they don't form raindrops. Most rain actually starts from ice crystals in clouds, which draw moisture from very cold water drops. The ice crystals grow in size and weight until they are big and heavy enough to fall from the cloud. If the air at the earth's surface is cold enough, they remain in crystal form and fall as snow or melt on the way to the ground and fall as rain. Again, the air in the cloud may be 100 percent humidity and this process may not happen. Thus you have saturated air, but no precipitation. Sometimes you just have to ask a question at least one thousand and ONE times to get an answer!
2016-03-27 08:37:12 · answer #2 · answered by Anonymous · 0⤊ 0⤋
When the humidity is 100%, it means the air is moist enough for fog or mist to form (but other conditions are also required).
A 100% humidity could occur when there are clouds in the sky, or when the sky is clear.
Rain may cause the humidity to raise to 100%, but the opposite is not true - 100% humidity (at surface level) will not produce rain. Clouds and rain are formed by other atmospheric processes.
2006-07-31 06:45:44 · answer #3 · answered by Barret 3 · 0⤊ 0⤋
It rains when the humidity exceeds 100%. Which typically happens when the humidity was (close to) 100%, but then the air cooled, reducing the maximum humidity thereby turing what used to be 100% into more than 100%.
2006-07-31 03:43:49 · answer #4 · answered by helene_thygesen 4 · 0⤊ 0⤋
Rain depends on the humidity condensing. To condense, the moisture dispersed in the air [humidity] needs a temperature difference to occur. Like when you blow humid air, say from your lungs, onto something cold, like a glass of ice water - the glass gets a thin film of water on it. So until the temperature drops, there will be no precipitation.
2006-07-31 03:41:49 · answer #5 · answered by sonyack 6 · 0⤊ 0⤋
Sometimes it does. Rain requires cool air or low pressure or both. 100% humidity just means that the air is saturated with water vapor. If the temperature of pressure drops, it will rain.
2006-07-31 03:40:34 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Sometimes it does,but usually it does not because it is almost hot.But sometimes u have it raining after the humidity is over...
2006-08-01 23:10:50 · answer #7 · answered by sulaiman s 4 · 0⤊ 0⤋
at the time of100% humidity the atmosphere get saturated by the water viper .and this is the time of angel's tear.
2006-07-31 03:47:02 · answer #8 · answered by Sayom 2 · 0⤊ 0⤋
the rain can't fall from the deep blue sky because it's too much water in the air!!!
2006-07-31 03:43:20 · answer #9 · answered by immortall_fortress_soul 1 · 0⤊ 0⤋