2nd 100 Degree Day

August 15, 2008

Snapshot A short post tonight, because I got behind making graphics for an extra segment.

We really lost the surface easterly flow today, in fact when I drove through Corbett, at the west end of the Gorge, it was calm around 11am.

So I think it's somewhat amazing that we still made it into the low 100s in the middle of August with no east wind in the metro area.  That's a really hot airmass!  I see Timberline Lodge made it to 82 degrees, that's the warmest I think I've ever seen on that sensor.

No significant changes for tomorrow.  Obviously the marine seepage is pumping humidity into our hot airmass; dewpoints have been rising this evening.  But the large-scale easterly flow continues through the day tomorrow, so I don't expect any major cooling push tomorrow until after peak heating time.

Models have come together on a strong shortwave swinging northeast through the region Sunday night and Monday AM.  This might be a great setup for a quick thunderstorm outbreak…something to keep an eye on for the next day or so.  This type of a shortwave moving through Eastern Oregon has brought a severe weather outbreak several times in my forecasting life here in Portland.

Okay, time to go…I'll be on vacation, one last time, Monday-Wednesday.  Next post will be Thursday…unless it gets really exciting Sunday night…Mark Nelsen