Very Brief Warm Spell

June 19, 2007

Photo2I mentioned what appeared to be a Circumzenithal Arc  in the 10pm show tonight.  It’s somewhat more rare than a halo around the sun.  Nice colors overhead today though.  Click on that link to see much more detailed info about what causes an arc such as this.
A quick jump into summer today.  I noticed there was even a very brief east wind at the west end of the Gorge this morning as the onshore flow briefly stopped.  That’s what helped us go from 67 at PDX yesterday to 83 today.  Pretty good to get a 16 degree jump in one day.  Now we level off tomorrow as onshore flow kicks in late in the day.  Weakening front offshore moves inland Thursday morning.  Latest (00z) runs show little or no moisture making it into the Western Valleys with this system.  Considering the past 10 days it’s probably safest to have a few sprinkles in the forecast, but I took them out (living dangerously apparently).  Big trough gets closer and closer and then moves into the Northwest Saturday and Sunday.  Luckily I work those days so apparently I won’t be missing any nice summer weather eh?
I see a change, a very familiar change, in the 00z long range maps tonight.  Ridging is going to stay to the east next week, keeping a new trough quite close to the close.  So I reduced the high temps to below 80 degrees next Monday and Tuesday.  Hmm…Cloudy June weather is going to continue…Mark