ATL: ALPHA - Post-Tropical - Discussion

[CrazyC83]

 https://twitter.com/CC_StormWatch/status/1307068916057899008

[Dean_175]

Why does it seem like the NHC is reluctant to name or even mention in the 5 day TWO these northeast subtropical systems? Cool SSTs and climatology saying development there is unlikely? I remember seeing this system on the GFS model run several days ago- but no yellow x on the NHC's tropical weather outlook. Then it was listed as 20/20 until it was suddenly and unexpectedly upgraded to Alpha.

Same thing with the December 2013 subtropical storm. That thing was spinning out in the northeast Atlantic for a couple of days with clear subtropical characteristics but never received a name. It was only recognized in post-season analysis.

[ElectricStorm]

Down to a TD
24L ALPHA 200919 0000 40.5N 7.7W ATL 25 1005

Thoughts and prayers with everyone affected by this over there. Certainly a unique storm

[TheStormExpert]

Did Portugal even have Tropical Storm Watches/Warnings up for this? As the NHC graphic never showed them.

[Hammy]

Did Portugal even have Tropical Storm Watches/Warnings up for this? As the NHC graphic never showed them.

I don't think there's any protocol for it in mainland Europe, though I assume they had wind advisories as they're hit with non-tropical systems often.

[eastcoastFL]

That was fast we only got 9 pages in from start to finish on a land falling named storm

[ClarCari]

That was fast we only got 9 pages in from start to finish on a land falling named storm

lol bc the NHC named it at the 11th hour...literally (CDT)

[CrazyC83]

Don't let the hit you on the way out! See you sometime in the future...

[CrazyC83]

The posts in this forum are NOT official forecasts and should not be used as such. They are just the opinion of the poster and may or may not be backed by sound meteorological data. They are NOT endorsed by any professional institution or STORM2K. For official information, please refer to products from the NHC and NWS.

AL242020, ALPHA, 20,
20200914, 1200, , EX, 47.1N, 23.3W, 40, 996,
20200914, 1800, , EX, 47.1N, 22.8W, 50, 992,
20200915, 0000, , EX, 47.0N, 22.6W, 55, 990,
20200915, 0600, , EX, 46.0N, 22.4W, 60, 987,
20200915, 1200, , EX, 45.2N, 22.2W, 55, 989,
20200915, 1800, , EX, 43.9N, 21.5W, 50, 992,
20200916, 0000, , EX, 42.9N, 20.4W, 45, 994,
20200916, 0600, , EX, 42.0N, 19.8W, 45, 994,
20200916, 1200, , EX, 41.0N, 19.6W, 45, 995,
20200916, 1800, , EX, 39.9N, 19.3W, 45, 995,
20200917, 0000, , EX, 38.7N, 19.0W, 40, 996,
20200917, 0600, , EX, 38.3N, 17.8W, 40, 997,
20200917, 1200, , TS, 37.7N, 17.3W, 40, 997,
20200917, 1800, , TS, 36.6N, 15.3W, 45, 995,
20200918, 0000, , TS, 36.9N, 13.0W, 50, 993,
20200918, 0600, , TS, 37.9N, 11.1W, 50, 993,
20200918, 1200, , TS, 38.9N, 10.3W, 50, 994,
20200918, 1800, , TS, 39.9N, 9.0W, 45, 996,
20200918, 1830, L, TS, 40.1N, 8.9W, 45, 996,
20200919, 0000, , LO, 40.5N, 7.7W, 30, 1004,

The big thing here is genesis time. Looking at earlier satellite images, I would place it at 1200Z September 17. I would also change the status from subtropical to tropical, since it had a small RMW and fairly deep convection throughout (-50C or so) with similar storms being classified as tropical.

[Shell Mound]

 https://twitter.com/webberweather/status/1307025044758056960

[mrjet]

Some HD loops, yesterday



Link: https://youtu.be/9PcgTiNwvWA

[Ryxn]

If the Atlantic keeps shooting out storms like this, at this rate we’ll break 30 NS by mid or late October. Who’s ready for Hurricane Theta?

30 named storms would actually bring us to Iota because 2005 technically only had 27 named storms (there was one unnamed subtropical storm) so 3 letters after Zeta gives us sweet Iota. I do want 2020 to hit Kappa though with 31 named storms because I LOVE the letter Kappa. Would also make 2020 have the most tropical cyclones (32) beating 2005's 31.