1 Katla produces basaltic magmas that typically do not cause explosive eruptions. 2  Many scientists attribute a layer of ash deposited in the North Atlantic and across Europe some 12,000 years ago to a massive eruption of Katla.
The annual average precipitation at Lacey is 50.79 Inches. Winter months tend to be wetter than summer months. The wettest month of the year is November with an average rainfall of 8.13 Inches. (OLYMPIA AP Weather station, 5.78 miles from Lacey)
Average precipitation at the inlet amounts to 237 inches a year (6,009 mm), which falls on 233 days annually. In the lower 48 states, western Washington and the north coast of Oregon are the wettest areas. That's the only area outside of Alaska and Hawaii where yearly precipitation totals over 100 inches (2,540 mm).verage precipitation at the inlet amounts to 237 inches a year (6,009 mm), which falls on 233 days annually. In the lower 48 states, western Washington and the north coast of Oregon are the wettest areas. That's the only area outside of Alaska and Hawaii where yearly precipitation totals over 100 inches (2,540 mm).