CPAC: LINDA - Post-Tropical

[Yellow Evan]

Holding steady.

[ScottNAtlanta]

This is just about textbook look for an annular hurricane. Take a good long look. This is a rare sight indeed!

And the 2nd out there this year

Felicia was not an annular hurricane.

[Yellow Evan]

This is just about textbook look for an annular hurricane. Take a good long look. This is a rare sight indeed!

And the 2nd out there this year

Felicia was not an annular hurricane.

It was about as annular as you could get and was called annular by the NHC and others even though the SHIPS annular index didn’t technically pick it up

[Kingarabian]

This is just about textbook look for an annular hurricane. Take a good long look. This is a rare sight indeed!

And the 2nd out there this year

Felicia was not an annular hurricane.

Per microwave imagery, NHC, and visible imagery, Felicia was an actual annular hurricane (resembled one a bit more than Linda tbh) and behaved like one. Remains to be seen if Linda will behave like a true annular hurricane the way Felicia did.

[Nimbus]

Was there a star pattern from the mesovorts in the eyes of these annular hurricanes?

[Kingarabian]

Was there a star pattern from the mesovorts in the eyes of these annular hurricanes?

Visible gif loops from yesterday posted a few pages back showed a plethora of mesovorts in Linda's eye. Felicia had them too. Mesovorts are going off in Linda's eye as we speak.

[Kingarabian]

GMI pass about 4 hours old but wow:




Amazing structure.

[weeniepatrol]

GMI pass about 4 hours old but wow:

Amazing structure.

That is spectacular, classic, textbook!!!

[weeniepatrol]

Someone should definitely post Linda '21 to the all time photos thread.

[Yellow Evan]

TXPZ23 KNES 160023
TCSENP

A. 12E (LINDA)

B. 15/2330Z

C. 18.7N

D. 121.6W

E. ONE/GOES-W

F. T5.0/5.5

G. IR/EIR/VIS

H. REMARKS...A WMG EYE SURROUNDED BY LG AND EMBEDDED IN MG YIELDS A DT
OF 5.0 AFTER AN EYE ADJ OF 0.5. MET AND PT AGREE AND ARE EQUAL TO 5.0
BASED ON A WEAKENING SLOWLY TREND IN THE LAST 24 HOURS. FT IS BASED ON DT.

I. ADDL POSITIONS

NIL


...TUGGLE

[Kazmit]

I always thought Isabel was the textbook annular hurricane but this might take the crown.

[ScottNAtlanta]

And the 2nd out there this year

Felicia was not an annular hurricane.

Per microwave imagery, NHC, and visible imagery, Felicia was an actual annular hurricane (resembled one a bit more than Linda tbh) and behaved like one. Remains to be seen if Linda will behave like a true annular hurricane the way Felicia did.

I went back and looked and saw no official (or unofficial) documentation on Felicia being annular. It had a 10 mile eye which is rather small for an annular storm and it weakened pretty rapidly. The NHC did, however, say this one was annular.

[gatorcane]

https://imgur.com/7csBnP9

Someone should definitely post Linda '21 to the all time photos thread.

Wow very impressive, beautiful symmetry and huge eye

[cheezyWXguy]

I always thought Isabel was the textbook annular hurricane but this might take the crown.

I dunno, Isabel had deeper cloud tops and a smoother, warmer eye at peak. Linda and Felicia are the most impressive annular storms I’ve seen in a while, but I still think Isabel is the best

[Kingarabian]

Felicia was not an annular hurricane.

Per microwave imagery, NHC, and visible imagery, Felicia was an actual annular hurricane (resembled one a bit more than Linda tbh) and behaved like one. Remains to be seen if Linda will behave like a true annular hurricane the way Felicia did.

I went back and looked and saw no official (or unofficial) documentation on Felicia being annular. It had a 10 mile eye which is rather small for an annular storm and it weakened pretty rapidly. The NHC did, however, say this one was annular.

In the last section
 https://twitter.com/pppapin/status/1416346221225017347



Pappin from the NHC.

 https://twitter.com/webberweather/status/1416355362349801477



US Government met.

[Ptarmigan]

I notice East Pacific and West Pacific have more annular hurricanes than the Atlantic.

[Mkmaj]

Sometimes people say that S2k members wishcast. For me, personally (long time lurker and learner, never poster) this is what I want to see. The problem is that it never gets coverage if it's not a C5 heading for FL. This is beautiful.

[Sciencerocks]

[Yellow Evan]

I notice East Pacific and West Pacific have more annular hurricanes than the Atlantic.

They also have more hurricanes period tbf.

[cycloneye]

Hurricane Linda Discussion Number 24
NWS National Hurricane Center Miami FL EP122021
500 PM HST Sun Aug 15 2021

This evening's satellite presentation reveals little change in
Linda's annular cloud pattern. The eyewall consists of -60 to -65C
cloud tops and the 38-n-mi-diameter obscured eye temperature is a
warm +12C. Once again, using a consensus of the Final T- and CI-
Dvorak satellite intensity estimates from TAFB and SAB along with a
blend of an earlier SATCON and UW-CIMSS ADT estimates, the initial
intensity is held at 95 kt.

While Linda is expected to move in a generally west-southwestward
to westward motion during the next couple of days, the annular
hurricane will essentially be paralleling an oceanic temperature
gradient while remaining over 26-27C waters. Since the wind shear
component is forecast to remain low throughout the entire forecast,
only invading drier more stable air will negatively affect the
cyclone's intensity. Intensive research in the past has proven that
these truck-tire-shaped tropical cyclones tend to weaken slower
than the climatological rate recognized in the eastern Pacific.
Therefore, only slow weakening is forecast through the 60-hour
period. Afterward, Linda will move over a steep sea-surface
temperature gradient (sub-24C) which should induce a more rapid
weakening pace. The NHC intensity forecast is hedged closely to
the Decay-SHIPS model through 60 hours, then uses a blend of the
global models and the IVCN/HCCA consensus aids through day 5.

The initial motion estimate is west-southwestward, or 255/9 kt,
and this general heading should continue through Monday night. A
subsequent turn back to the west is forecast as mid-tropospheric
high pressure over the northeastern Pacific builds southward along
135W. At the 48-hour period, a turn toward the west-northwest is
expected as Linda rounds the southwestern periphery of the
aforementioned ridge. The latest NHC track forecast is basically
just an update of the previous one through day 3, and then is
adjusted slightly to the left closer to the TVCN consensus.


FORECAST POSITIONS AND MAX WINDS

INIT 16/0300Z 18.6N 122.0W 95 KT 110 MPH
12H 16/1200Z 18.2N 123.3W 90 KT 105 MPH
24H 17/0000Z 17.8N 124.9W 85 KT 100 MPH
36H 17/1200Z 17.7N 126.8W 80 KT 90 MPH
48H 18/0000Z 18.1N 128.8W 75 KT 85 MPH
60H 18/1200Z 18.6N 130.8W 65 KT 75 MPH
72H 19/0000Z 19.5N 133.4W 60 KT 70 MPH
96H 20/0000Z 21.1N 138.3W 50 KT 60 MPH
120H 21/0000Z 22.3N 142.8W 35 KT 40 MPH...POST-TROPICAL

$$
Forecaster Roberts