Revisited Last Fall's Math...
Looked at my graph again with data that I didn't have yet in the fall. I plotted the rest of last years Southern Pacific Oscillation temperatures with Plain Washington snowfall data found in the hardware’s monthly newsletter. I originally used the snow measurement taken near Fish Lake of 243" inches last year; while Plain only measured 181". Also the SPO temperature oscillation was warmer than originally predicted. Where I used a neutral oscillation of 0 (as predicted); the actual readings (August - November) were actually ~ +1. December was -1.41 degrees Celsius lower than "normal" prompting the recent predictions of a colder and wetter Pacific Northwest. This changed the average oscillation, for the year, from an assumed -.475 degrees to an actual -.25 degrees.
The original graph (October 2008) and trend line showed a 22.3% (R sq) chance of 160” being the #; while I said, looking at the graph that we were in the “snow sweet spot” (and made a bold, possibly bias, prediction of 200”+ due to the snow check of one said 09 D8) due to 4 (3 real 1 assumed) seasons with 200 + within a .5 degree range.
Last Fall's Graph
The adjusted trend line #, with the actual average SPO of -.25, is 150” with a 22.5% (R sq) chance.
Updated graph
The Midway snow season to date total is 102.5” leading me to assume Plain is ~97” (Fish Lake x .945).
SO if you look at the December –1.41 and the January –1.1 degree oscillation; along with the forecast from many of a colder and wetter winter/spring remaining….
I calculated the 75th percentile of the last 39 years of monthly snowfall data from plain to come up with 31” in February, 13.5” in March, and 1” in April, giving Plain a predicted 2008/2009 total snowfall of 142.5” and near Midway (Fish Lake) 151”.
I apologize if I got anyone’s hopes up or even worse if I influenced you to purchase something. Even the experts said that the La Nina to warm and back to cold is very unusual; we will know in May!