We declare summer's end and autumn's sudden arrival.

[elleng]

'Just like that, summer has flipped to fall in Washington. The change was unambiguous and swift, and there’s no sign we’ll turn back in a meaningful way.

It’s time for a wardrobe switch-over from shorts and T-shirts to blue jeans and fleeces.

As recently as this past weekend and Monday, it still felt like beach and pool weather. High temperatures in Washington soared to at least the upper 70s like they had every day since mid-June.

But Tuesday, highs only managed the low 70s, where they’ve hovered since. This weekend into early next week, they’ll turn even cooler, only reaching the 60s.

The dip in low temperatures has been even more jarring. Most of the time since June, nights have been balmy, with lows of at least 70 degrees. We even set a record for most nights in a row above that mark between July and August. But both Tuesday and Wednesday mornings, we awoke to chilly 50s with even some 40s in our outlying areas.

This weekend, lows will slip into the 40s area-wide. . .

The rapid weather regime transition is related to a change in the jet stream pattern. The fast current of high-altitude winds has plunged south, allowing Canadian air to pour over the region. Much of the northeast third of the country will see temperatures about 10 degrees cooler than normal this weekend.'>>>

https://www.washingtonpost.com/weather/2020/09/18/washington-dc-summer-fall/?

[soothsayer]

1. Truthiness

[niyad]

2. Labor Day here was 90+. Tues/Wed over 5 inches of snow. Gone by Thursday. Friday 90 again.

This week 70s and 80s. Typical insanity. Here we do not have seasonal wardrobes. Layers. But, oh, the aspens are beautiful.