In the last 4 years California has been in a complete drought for a majority of the state. Usually Northern California gets the most rain. We had good rains this winter but it will not replace the ground water that is now gone or very low. Some cities and towns are without water.
New Zealand's Fjordlands and Hawaii's Alakai Swamp on Kauai.
forest
15 inches.
The average annual precipitation in Germany varies in different regions. The range of annual precipitation is anywhere from 23 inches in most areas to up to 48 inches in the Alpine mountain region.
Where on earth surface does most precipitation fall
some of the mountain ranges do
New Zealand's Fjordlands and Hawaii's Alakai Swamp on Kauai.
Most areas of the desert receive little rainfall, just a few millimeters of precipitation. Some areas have received absolutely no rainfall in over 400 years.
In California most precipitation falls on the eastern sides of mountains
In moist sunny areas.
In moist sunny areas.
forest
It falls in the watersheds in the north.
Areas near the equator get the most rain. Areas like deserts sometimes never get precipitation. As far as the over all precipitation goes, there are great graphs and charts out there to see what the average precipitation per year on earth is.
15 inches.
Average humidity on Antarctica is about five percent. Annual precipitation is minimal -- single digit inches -- and most precipitation evaporates or freezes before hitting the ground.
By precipitation maps, do I understand correctly that you mean the maps which record the rainfall at various locales during a given storm? If so, they are used in the study of orography, which is the effect of the terrain on the weather above it. Certain areas, due to their topography, will receive more or less rain in any given storm. For example, in Southern California I know that when a storm comes through, the rain will be heaviest on the coastal slopes and lightest in the deserts. The variable precipitation data will be used, among other things, to issue point forecasts, which are a National Weather Service product tailored to individual cities and towns, and to improve the accuracy of future forecasts by increasing meteorologists' awareness of which areas will receive the most rain in a storm.