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)
3) Average annual precipitation ranges from about 40 inches along the southeast coast to 51 inches in north-central parts of the state. Many areas average between 43 and 47 inches.