Friday, March 9, 2012

A light mist floated down on us, hardly getting us damp.  It rains 150 days per year, but it only rains 37 inches per year, so most of those rains are light.  I remember the record rain of about five inches one October day a few years ago. We get less rain than New York, Miami, or Houston.  But we get a variety of types of rain.  We should have fifty words for rain in Seattle. 

Certain forests with tall trees can create their own rainfall, greatly increasing the water captured.  I wonder if Eagle Landing Park has trees tall enough to squeeze rain out of the clouds.  We know that rainfall totals are highest where air has to climb over mountains and the moisture is essentially squeezed out by the pressure and temperature changes.  The top of Eagle Landing Park is about 275 feet.  If you add trees 100 feet tall, that's 375 feet the air has to climb to get over this forest.  If the trees grow to 300 feet, like they should, the clouds will have to climb to 575 feet.  I will have to come back in a few hundred years and see if the rainfall has increased. 

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