orographic patterns. Less than 15 miles away from Mt. Waialeale is Mana, which gets 23 inches/year. I remember a long time ago when I was teaching Environmental Engineering at the University of Hawaii saying that Mana Beach is only ten miles from Mt. Waialeale, and gets 10 inches of rain per year.
- Most in 24 hours: 71.9 inches (6 feet) Cilaos, Reunion on 7-8January1966
- Most in single storm: 253.3 inches (21 feet) Commerson, Reunion in January 1980
driest place on Earth? The Dry Valleys of Antarctica, which have seen zero net rainfall for 2 MILLION YEARS. The Friis Hills there have had no water for 14 million years. But wait, you say, what about all that snow and those lakes? I wondered, too, and best as I can figure out, the snow drifted in from outside the area.