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Currently in Portland — December 13th, 2021

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The weather, currently.
Snow continues to pile up in the Cascades.
Snow continues to pile up in the Cascades.
Happy Monday— we have a pretty typical December day coming up. High temperatures will peak in the low 40s or even upper 30s, with copious amounts of snow in the higher elevations. We could be measuring snow in the ski resorts by feet rather than inches by midweek. As we get into that time period some of the higher hills in and around Portland could even receive a dusting of snow or so, but at this point, that seems to be a pretty low chance. That being said, there seems to be a chillier regime arriving as winter enters full swing, and with that always exists the risk for some lower elevation snow. Details on winter weather in this region are almost never concrete until about a day out, so always be sure to stay tuned. When in doubt, the National Weather Service in Portland is, of course, the utmost authority on the meteorological details. —Kavin Iyengar
What you need to know, currently.
Appodlachia Podcast
Here is a list of ways to help victims of the tornadoes in Kentucky. 🧵
Friday night’s tornado outbreak across nine southern states is now the deadliest December tornado outbreak in history.
As with all major natural disasters, the details of this tragedy are still murky, but initial photos and stories are equal parts horrific and heroic. Dozens of tornadoes destroyed hundreds of homes down to their concrete foundations in the middle of the night. More than 70 people have died so far in a factory in Mayfield, Kentucky — one of the single-worst tornado-related building collapses ever recorded
Even though the storms were well-forecast, their intensity was unusually strong and widespread for the time of year. The longest-lived thunderstorm tracked more than 250 miles across four states, one of the longest-lasting tornado-producing storms in recorded history anywhere in the world.
December tornadoes are not uncommon in the South, in fact, there’s a regular second tornado season that happens almost every year there. Nearly one-third of all tornado deaths in Alabama happen in November & December, for example. Nighttime tornadoes are deadlier than tornadoes during the day, mostly because it’s much more difficult for people to take notice and rush to safety.
There’s also evidence that this specific event was made worse by global warming. Temperatures were among the warmest ever recorded in the month of December, providing a surge of tropical moisture and energy to make the storms stronger. Past studies have shown that although the total number of tornadoes is not increasing due to climate change, they are coming in bunches and outbreaks more often, making it more difficult to seek shelter.
Evan Bentley, one of the forecasters at NOAA’s Storm Prediction Center who helped forecast the tornadoes, said that scientists “will spend years and probably decades trying to decipher” the exact causes of what made this particular event so damaging.
The Appodlachia Podcast has compiled a thread of local organizations and mutual aid groups that are helping with relief efforts if you’d like to help.
— Eric Holthaus
That's it! Be sure to follow Currently on Twitter:
This will be the wettest November in the history of Canada's west coast — if weather models hold.

Three more atmospheric rivers are arriving to the flood-soaked British Columbia coast over the next few days.

@50ShadesofVan has the latest for @currently:
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