Joe Boomgard-Zagrodnik at the Convergence Zone has an update on the PNW atmospheric river and the serious flooding problems it has created: https://theconvergencezone.com/2025/12/11/historic-river-flooding-as-atmospheric-river-aims-at-washington-for-a-4th-consecutive-day/
#wawx

This is a pretty interesting article by Ben Noll about what goes into the formation of an El Niño weather pattern. It includes a somewhat speculative but not-reassuring discussion on a possible El Niño event next year. #giftlink

https://wapo.st/4pBgkae

The last of the three King County sites is King County South (KCS) treatment plant, and its Sars-CoV-2 7DRA numbers are up, though still low by historical standards. The last 7DRA calculation was made on 12/4.

The Brightwater sewage treatment plant (BWT) in Woodinville climbed up some, but is still fairly low. The last 7DRA calculation was made on 12/4.

Hi, these are the weekly #washingtonstate #kingcounty (that is, #seattle and environs) #COVID #COVID19 #wastewater toots. A quick reminder that this King County respiratory disease data comes from Washington State, not the federal government.

Welp, there's no data for the West Point (WSPT) sewage treatment plant this week. We do have data for the other two sites, which follow.

WSPT is one of three King County(-ish) sewersheds in this dataset. You can find overviews, individual sewershed results, and a breakdown of variants for the state wastewater surveillance program, along with other metrics like case counts and hospitalizations for Covid-19 and other respiratory illnesses, at https://doh.wa.gov/data-and-statistical-reports/diseases-and-chronic-conditions/communicable-disease-surveillance-data/respiratory-illness-data-dashboard#WasteWater. If you go to the page and click "learn more" in the statewide view tab, you can find out lots of details about how these data are calculated and how to interpret them. The dashboard gets updated every Wednesday (generally). The Department of Health is here on the fediweb, at
@WADeptHealth

#wawx

https://www.seattletimes.com/seattle-news/weather/4-wa-rivers-might-break-major-flooding-records-from-atmospheric-river/

In western Washington the next round of flooding on Wednesday will be worse than the flooding on Monday.

The blue diamonds on the map show the location of rain gages where the water level is forecast to exceed the previous all time high water mark.

The squares are clickable streamgages.
Purple = Major flood expected
Red = Moderate flood expected
For details, including near real time water levels, open the map, click a gage and follow the link. For a description of the impacts based on water level, scroll down below the graph.

The screenshot impacts are for the Skagit River at Mt. Vernon which is forecast to exceed the current record high water mark by an additional 4 feet. 😟
#PNW #WAwx #Seattle #Flood #SevereWX

Open GISsurfer map:
https://mappingsupport.com/p2/gissurfer.php?center=47.639533,-122.783203&zoom=7&basemap=USA_basemap&overlay=Stream_gage_forecast_record,Stream_gage_maximum&data=https://mappingsupport.com/p2/special_maps/disaster/USA_weather.txt

@trs theoretically you should be seeing the invite code as a private mention. Lmk if that’s not the case.

Mastodon messaging modalities 😅

@trs I don’t have one handy, but I will ping the admin and ask. If I get it I will dm it to you.

@stefani @cR0w you are thinking of the Spanish orcas. Instead of sinking modest sailboats, Puget Sound orcas like to amuse themselves by inventing new forms of headwear.

https://www.nationalgeographic.com/animals/article/orcas-puget-sound-salmon-hats-killer-whales

@cR0w Salish Wildlife Watch has some adorable videos of the other orcas helping the baby along. It’s so new, it still has its umbilical cord.

Breaking news, orca edition: K-pod has a brand new member. 🤩

https://www.kiro7.com/news/local/new-orca-calf-born-into-southern-residents-k-pod/PCS42EP7JBGQJAYHRHMJ4UQHUI/#

Nov 19 - A young mom and her cub strolling across the beach, testing the newly formed sea ice of the Hudson ahead Due to a late #winter, sea ice has been slow to form, & the #bears have gone over 6 months without a meal Despite their hunger, they walked right by us, paying no attention #wildlife

Space Weather

Active regions 4294 and AR4299 continue to be active. Between them there have been five flares >M1 in the last 24 hours, with the largest being an M3.1 at 21h19 UT 08 Dec. An eruption between 00h45 and 02h UT caused type II and type IV radio emissions, indicating further CMEs.

We currently have four or five CMEs inbound, some of which are poorly defined and difficult to spot due the the amount of activity. The main CME from the M8.1 flare on 06 Dec is still expected to hit Earth in the coming hours, although it appears to be later than forecast. This is not unusual due to the poor coverage provided by our space assets.

A G3 level geomagnetic storm is expected today, with a slight possibility of G4 for a brief period.

NOAA is forecasting G1 conditions for 10 Dec, but Dr Tamitha Skov's assessment suggests G2 level conditions for 10 & 11 Dec due to the additional CMEs following the main one.

Follow my page for live solar data:
https://www.tvcomm.co.uk/g7izu/welcome/earth-geomagnetic-environment/

#spaceweather
#aurora
#g7izu

The flooding outlook for western Washington is going from bad to worse. More rivers are now forecast to reach major flood stage.

When you open the map you will see the current weather radar and symbols for streamgages. The gage colors show the *forecast* flood level - not the current flood level.
Purple = Major flood expected
Red = Moderate flood expected

For details, including near real time water levels, open the map, click a gage and follow the link.

Tip: For a description of the impacts based on water level, scroll down below the graph. The screenshot impacts are for the Cowlitz River at Packwood which is forecast to be real close to the all time high water level.
#PNW #WAwx #Seattle #Flood #SevereWX

Open GISsurfer map:
https://mappingsupport.com/p2/gissurfer.php?center=47.570290,-122.387695&zoom=7&basemap=USA_basemap&overlay=State_boundary,Forecast_discussion,USA_weather_radar,Lake_river_stream,Stream_gage_48hr_Forecast&data=https://mappingsupport.com/p2/special_maps/disaster/USA_weather.txt

A rundown on the #wawx atmospheric river end times from Joe Boomgard-Zagrodnik at The Convergence Zone blog: https://theconvergencezone.com/2025/12/08/two-part-atmospheric-river-event-now-underway/

Apparently the models suggest a nice rain shadow effect from Sequim to part of Snohomish County.

Snow levels mostly 7,000 feet (tries to sob in a dignified manner).

Rain? What rain? I don’t see any rain.

Central Puget Sound area is in a classic ‘doughnut hole’ where the Olympic Mountains to the west block the rain. The map shows the weather radar. Conditions do change so if you open this map later the doughnut hole might be gone.
#PNW #WAwx #Seattle

Open GISsurfer map:
https://mappingsupport.com/p2/gissurfer.php?center=47.777341,-122.189941&zoom=8&basemap=USA_basemap&overlay=USA_weather_radar&data=https://mappingsupport.com/p2/special_maps/disaster/USA_weather.txt

@mlanger I would not say that is a sure bet, especially if you are able to catch a substorm.

I like checking these webcams about what is actually visible in my approximate region. I find it much more informative than looking at the noaa oval visualizations.

https://theauroraguy.com/pages/webcams?srsltid=AfmBOopbmhsfQVH8bXGI3GinEXcR82A14l8lhnyICEdTgA1OFnQkoz3V

Me: I wonder if I’ll be able to catch of that exciting aurora action that might happen tonight? 🤩

Seattle weather gods: lol yeah no

I'm getting a LOT of new followers this weekend and today from mastodon.social that claim to be news aggregators. all created in the past 72 hours. Someone's spinning up a MONSTROUS propaganda/fake news campaign out there right now! I'm guessing it's a state level actor. Be cautious and double-check anything that sounds too good to be true or too outrageous to ignore!