|Seattle Climatological Data|
So we now at or close to the bottom for temperature, Thus, here in the Northwest our lowest temperatures are approximately two weeks after the winter solstice, (December 21) when the warming radiation from the sun is least and the days are shortest. Interestingly, in the summer there is a much longer lag between the maximum solar radiation on the summer solstice (June 21) and our warmest temperatures (early August). Clearly, solar radiation at the top of the atmosphere is not the only story for surface temperatures-weather systems and clouds play a role as well. For example, in summer we have lots of low clouds and onshore flow in June and early July that slows the warming.
Talking of climatological records, December broke one: Seattle had 27 days of measurable precipitation last month, an ALL TIME RECORD for December. The old record was 26 days.
There is now a large pressure difference across the Cascades, with high pressure entrenched over eastern Washington (see map) and an offshore trough approaching. The result has been very strong
Finally, lets end with something we have not seen in while...a nice sunset shot. But this one had an added twist. Taken from my department, here was a low level contrail from a jet that left a shadow on a higher cloud deck....its above the third tower on the left side of the photo.