The large-scale weather pattern has shifted in a way that is going to give Seattle far better weather than southern California and protect us from any Japanese radiation for a while.
What configuration can provide such a boon? Large-scale troughing on the West Coast that is going to send weather disturbances to our south.
Here are two upper-level weather maps for the 500 mb level (roughly 18,000 ft).
The airflow parallels the lines and the closer they are together the stronger the winds. A strong trough will be resident along the coast and the current of strong winds...often known as the jet stream...will be heading south into LA-LA land. Thus, while substantial rainfall will be falling over CA we will remaining generally on the dry side. In fact, this is currently a flash flood watch and wind advisory for LA! And with the flow moving south into CA any radiation-bearing particles crossing the Pacific will head south toward southern CA.
The Northwest has been sufficiently wet that even if we don't get a drop for the rest of the month, we will still have normal rainfall for March.
You are now reading the articleChanging Weather Pattern Reduces Radiation Risk, Brings Improved Weather with the link address https://www.outsiderla.me/2011/03/changing-weather-pattern-reduces.html