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)
A good example of the geographical variability of precipitation is shown here in a plot of average annual precipitation for the state of Washington. Within a distance of 250 miles, annual precipitation totals change from more that 180 inches per year (deep purple) to less than 10 inches per year (bright red)!