SPAC: YASA - Post Tropical

[ElectricStorm]

My first successful EWRC outlook!!!
Before even an official website !!!
If this EWRC does occur this will be a massive eye. maybe 50-60 NM

Huh? I haven't seen a microwave pass in a while so I'm not entirely sure, but I don't think an EWRC has started yet. I could be wrong though.

Read the above message above my last post.

I totally whiffed on that one. Whoops. Read right over it somehow lol

[mrbagyo]

temp difference between the eye and cloudtops is now at 95.95

[EquusStorm]

What a beast.

[mrbagyo]

[mrbagyo]

2020-12-16 00:00:00Z
Image: NOAA-20 / VIRRS
(enhanced via Lightroom)

[doomhaMwx]

Impressive AMSR2 pass clearly showing a concentric eyewall structure.




Signs of ERC have began to manifest on latest satellite images as well.

[doomhaMwx]

Yep, ERC is underway.

[ElectricStorm]

Man as huge as this eye is going to be, this EWRC may give the majority of the islands hurricane-force winds. Or at least a good chunk of it. I hope they are doing everything they can to prepare for this beast...

[ElectricStorm]

JTWC holds steady
05P YASA 201216 0600 15.0S 175.0E SHEM 140 914

[Ryxn]

Just absolutely insane that we first get the latest forming Category 5 storm in the Atlantic in mid-November and now we have the earliest forming Category 5 storm in the Southwest Pacific less than a month later in mid-December which is around the equivalent to a Category 5 Atlantic Hurricane in July a la Emily 2005 or a Cateogry 5 East Pacific Hurricane in June a la Ava 1973 and Celia 2010...


Incredibly rare event. Interestingly enough, 1973, 2010, and now late 2020 were all either La Niña or transitioning to La Niña, which make the occurrences even more strange.

2020 is one crazy year

[arlwx]

https://www.theguardian.com/world/2020/ ... s-for-zazu

(snip)
Twin cyclones are bearing down on Pacific islands, with Fiji’s main island likely to be directly hit by a category five storm for the second time this year.

Tonga and Fiji were bracing for potentially catastrophic damage as tropical cyclones Zazu and Yasa intensified off their coastlines on Wednesday.

Zazu, which is north-east of Tonga’s capital Nuku’alofa, is rated a category one system, with winds of up to 90km/h (55mph).

But Yasa, about 550km (340 miles) north-west of Fiji’s main island Viti Levu, has already been upgraded to a category five cyclone, with winds of up to 270km/h. It is expected to make landfall over Fiji late on Thursday or early on Friday.
(snip)

[doomhaMwx]

Yasa and Zazu.
Himawari-8 VIS, 12/15 1800Z - 12/16 0630Z

 https://twitter.com/i/status/1339178581591658497

[aspen]

Even with the concentric eyewalls, Yasa is still an incredibly impressive system on IR imagery.

[TorSkk]

Now the second most intense TC of the year with a central pressure of 906 mb. Could beat Goni's 905

[doomhaMwx]

05P YASA 201216 1200 15.2S 175.6E SHEM 140 915

HURRICANE WARNING 057 ISSUED FROM RSMC NADI Dec 161320 UTC.

TROPICAL CYCLONE YASA CENTRE 906HPA CATEGORY 5 WAS LOCATED NEAR 15.2
SOUTH 175.6 EAST AT 161200 UTC.
POSITION GOOD.
REPEAT POSITION 15.2S 175.6E at 161200 UTC.
CYCLONE MOVING EAST SOUTHEAST AT 8 KNOTS.
EXPECT SUSTAINED WINDS OF 130 KNOTS CLOSE TO THE CENTRE.

...

[InfernoFlameCat]

Appears to be re-intensifying with a thicker and colder CDO
Edit: Nope thats the new Eyewall nvm.
Eyewall is contracting good news.

[supercane4867]

Yasa at peak intensity. HD imagery

[ElectricStorm]

ERC taking effect
05P YASA 201216 1800 15.5S 176.7E SHEM 135 918

[TorSkk]

Now officially 899 hPa which I believe makes Yasa the most intense TC on earth since Meranti '16

[StormTracker89]

Increasing probability of another EWRC, 1st indications already starting to be seen in latest microwave imagery. Could be a good thing, lowering intensity at landfall/CPA to Fiji.