Updated Wednesday 3:50 p.m.
So, we meet again, way-too-hot-for-summer temperatures...
Highs today were back to around 90 degrees again, although believe it or not it's not a record high for the day. No, we're still more than 10 degrees short - July 29, 2009 stands as the hottest day ever recorded in Seattle at 103 degrees.
We won't get to 103 this week, but 90s is still nothing to sneeze at (unless you too have the pesky cold that's been going around.)
A clear and warm night is on tap with lows only in the low 60s. Expect another hot day Thursday and Friday -- they should be a little warmer than today, well into the low 90s around Seattle, maybe mid 90s in the warmer spots. A Heat Advisory is now in effect through Saturday night, which is the National Weather Service's fancy way of saying it's going to be 90+ during the day and stay warm overnight.
It looks like the air mass will cool slightly for the weekend with highs "only" around 90 both days. Break out the sweatshirts, eh?
Now, believe it or not there is some uncertainty now in the forecast models for next week. Don't ask me how sunshine for half a hemisphere is tricky for computers, but there is a budding wrinkle.
A trough of low pressure is expected to go into southeastern Alaska, which the models have been waffling over how much effect, if any, it'd have on our weather. If the trough drifts close enough into B.C., if nothing else it would nudge the ridge of high pressure over us off to the east, allowing more in the way of marine breezes to flow in and cool us off. If the low stays too far north, the ridge reigns supreme and the 80s/90s keep on coming next week.
Yesterday the models were all "forget the trough; long live the ridge" but today most of them are now giving more credibility to the trough. In fact, one model from this morning gradually brings the trough south into our neck of the woods by the middle of next week with a chance of showers.
Balance that against this summer, where a tie goes to the heat. We're drifting our forecasted highs down for early next week closer to 80, but there is really a range of 74-86 right now on the board for next week's possibilities. In the meantime, we're highly confident of the 90s the next few days, but at least by now we're all well experienced in what to expect, heat advisory or not :)
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