Cool Nights Return

October 11, 2010

A chilly night ahead tonight!  At 10pm the entire metro area (except right in the city) is in the 40s, some of the outlying areas already down in the lower 40s.  We’ll definitely have more 30s in the morning and in more places that haven’t seen 30s yet.  At my home I haven’t been below 42 yet this season and I’m already down to 42 right now.  There are some scattered high clouds moving through from a warm front well to our northwest, but there isn’t much else to inhibit the strong radiational cooling.  

Some spotty fog is definitely likely in the low spots overnight.  Offshore flow is gradually developing, but gradient is just now beginning to turn to easterly, so that won’t help too much.  We get some easterly wind through the Columbia River Gorge and out into the Metro area tomorrow, so it’ll be warmer and dry once the fog gets mixed out.  Then it’s on to our strongest east wind of the season so far on Wednesday morning.  Somewhere around 5-6 millibars easterly gradient through the Gorge.  That should give us gusts in the 30-35 mph range east metro and 40-45 mph in the western Gorge.  Thursday the offshore flow dies down as a very weak front approaches. 

We get some clouds and maybe a few showers late Thursday night or Friday morning, otherwise I don’t see a good chance for rain in the next 7 days.  Definitely no imminent start to the rainy season (many consecutive days of rain).  Actually it looks real boring the next 7-10 days.  Enjoy the sunshine!

By the way, tomorrow is the 48 year anniversary of the Columbus Day Storm…Wolf Read’s site is the best at taking an “exhaustive” look at the storm:

http://www.climate.washington.edu/stormking/October1962.html

Chief Meteorologist Mark Nelsen