Christy
Angel Diva
There was an interesting blog post from our local weather guru about La Nina. If anyone's wondering why we aren't getting hammered with snow, this helps explain it. He is talking mostly about WA state but this applies to any place where La Nina brings the rain/snow.
https://cliffmass.blogspot.com/2011/12/where-is-la-nina.html
In general, La Nina years are wetter during the entire fall-winter season....but that is only on average. You can think of weighting a coin---instead of heads and tails being equally probable, heads is more likely. Throw the coin ten times and it could be heads eight times--BUT you STILL will get two tails.
This year it is more LIKELY to be wetter than normal, but some La Nina years HAVE been drier than normal.
But there is something else... a characteristic of La Nina years is the persistence of a major ridge in the eastern Pacific. Normally, that ridge is far enough west that we are in the
downstream trough...giving us cool, wet weather. This year, the trough has been farther east than normal...giving us drier than normal conditions. And we have seen the ridging day after day. For some reason the ridge is shifted--and so we have been generally dry and cool.
https://cliffmass.blogspot.com/2011/12/where-is-la-nina.html