Intense Mid-latitude Cyclone off the US West Coast

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An intense mid-latitude cyclone is currently rapidly deepening off the Pacific Northwest coast. Most models have its pressure down to the 940s by 18 hours.




The European model shows >85kt gusts (yellow) off the coast, with some areas approaching 90kts near the center.



GFS Simulated IR shows a large eye feature showing up during its peak, as well as a secondary low spiraling around the main one after maturity.



Current Satellite w/Annotations:

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GeoColor imagery also shows hazy/milky seas near the low’s center, which is a sign of very agitated seas.

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Very pretty

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Currently at or near its peak intensity at around 942 mbar, which ties it with the October 2021 bomb cyclone. Also there’s a nice eye-like feature on visible like the GFS forecasted.

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Stalling out near BC

[underthwx]

Stalling out near BC

https://i.imgur.com/dmlRnnx.gif

That is intense looking. Is this considered sub-tropical? What are the wind speeds?

[IsabelaWeather]

Stalling out near BC

https://i.imgur.com/dmlRnnx.gif

That is intense looking. Is this considered sub-tropical? What are the wind speeds?

No, its a purely extra tropical cyclone. Its very different, but still beautiful! Winds are probably gusting to 100mph in areas of the ocean.

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Continues to spin down. Secondary low will soon form to the west.

[Hurricane2022]

Holy cowww
 https://x.com/WxTca/status/1859424064458326511

[underthwx]

Continues to spin down. Secondary low will soon form to the west.

https://i.imgur.com/e4J7ygM.gif

Its fascinating to me

[kevin]

Here are the lowest pressure readings I could find for this system:

950.5 mb (09:00pm UTC, November 19, West Astoria station)
955.5 mb (09:00pm UTC, November 19, WEST WASHINGTON - 300NM station)
963.7 mb (12:00pm UTC, November 20, South Nomad station)
965.0 mb (12:00am UTC, November 20, ship near 129W, 47N)
965.6 mb (07:00am UTC, November 19, buoy near 134W, 48N)

Highest 10-minute sustained wind speeds (incomplete since there are many more readings in the 45 - upper 50s kt range):

64 kt (03:00am UTC, November 20, Sartine Island BC [104m])
60 kt (04:00am UTC, November 21, Solander Island BC [94m])
60 kt (02:00am UTC, November 21, Midnight Sun [0m])
60 kt (12:00am UTC, November 20, ship near 129W, 46N)
55 kt (12:00pm UTC, November 20, ship near 131W, 50N)

Highest gusts:

78 kt (06:00pm UTC, November 20, Solander Island BC [94m])
61 kt (04:00am UTC, November 20, Sisters Island BC [24m])
59 kt (10:00pm UTC, November 20, Herbert Island BC [15m])
59 kt (06:00am UTC, November 20, Race Rocks BC [3m])
59 kt (04:00am UTC, November 20, Ballenas Island BC [14m])
56 kt (07:00am UTC, November 20, Cathedral Point BC [27m])

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Secondary low (X) now forming to the south. The old one looks a lot like a hurricane this morning

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The main low’s doing its best hurricane impression rn (this is from a day ago, but it still has that same look today)

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Fujiwhara effect