Quite a spell of nice weather continues through the foreseeable future. I hope you all enjoy the weekend, I'll be here working each afternoon/evening. But don't cry for me, I'll get those days back in October…it all evens out in the end.
The 6-10 day 500mb. anomaly map is to the left. It shows a positive anomaly sitting just to our west for the next 6-10 days. Some models show the ridging developing right over us the end of next week. If so, we would get warmer than the 85-88 that I expect this Sunday and Monday.
Tonight the low clouds are surging inland, up the Columbia River Valley. They reached Kelso/Longview before 10pm. With higher dewpoints and the long September night ahead, we should have no problem developing some thin cloud cover over the metro area for Saturday morning. Still a nice breakout for the afternoon though.
Easterly flow develops overhead from just above the surface to over 6000' tomorrow night through Monday afternoon. This should give us a good temperature jump Sunday and Monday, as I mentioned above.
Beyond that a system moves over the top of the ridge and slides down through the Rockies. This gives us a good push of cooler air Tuesday and Wednesday. Then another Fall surface high slides down to our east beginning next Thursday, repeating the switch back to easterly flow. I remember the first Fall in my weather career (1991) was similar to this, with off/on easterly flow and warm/sunny weather through early October. I love it; the warm sunny days and crisp/cool nights and mornings…Mark Nelsen
Posted by kptv 
FOX 12 Weather Blog 