ATL: FIONA - Post-Tropical - Discussion

[aspen]

Of course the barometer on this AF plane also isn’t working.

[msbee]

Ok guys and gals. I will shut down as the winds are starting to pick up here in PR and the power grid will go. Hopefully I will be back sooner than when Maria as I was 2 months without power and internet.

Good luck, Luis. Hope everyone will be ok.

[Iceresistance]

Of course the barometer on this AF plane also isn’t working.

Unless it's equipped with dropsondes, we may never know on the pressure of the storm.

[msbee]

Hoping those in Puerto Rico stay safe.
Guadeloupe recorded one death and extensive flooding from the heavy rainfall.

[NDG]

Weird path into Fiona.

[floridasun]

Ok guys and gals. I will shut down as the winds are starting to pick up here in PR and the power grid will go. Hopefully I will be back sooner than when Maria as I was 2 months without power and internet.

i hope you ok PR hope power not out two month as you did maria

[NDG]

Ok guys and gals. I will shut down as the winds are starting to pick up here in PR and the power grid will go. Hopefully I will be back sooner than when Maria as I was 2 months without power and internet.

Good luck Luis, hope it doesn't get as bad as Maria (power loss)

[NDG]

It looks like that eye like feature was nothing but a dry slot that got entrained into the CoC, not much above weak TS force winds in the SE quadrant found, we''ll see what the dropsonde shows about its pressure.

[CrazyC83]

Either a mesovortex or the center was found at 16.3N 64.7W - at least at 10,000 feet aloft.

[aspen]

It looks like that eye like feature was nothing but a dry slot that got entrained into the CoC, not much above weak TS force winds in the SE quadrant found, we''ll see what the dropsonde shows about its pressure.

Both microwave and radar showed there is indeed an eyewall, but I won’t disagree with the possibility that some dry air snuck in. This is the strongest Fiona’s SW quadrant has been; higher winds could be in the NE quad.

[Hammy]

So far nothing supports higher than 45kt, looks like Fiona's weakened since the last mission.

[Nimbus]

There were some tropical storm force winds found south of the center on the weak side of the circulation.
Yellow flags at flight level and pretty consistent TS strength wind peaks in the southeast Quadrant.
Recon didn't have their pressure recordings so couldn't be sure there is a well organized center based on pressure profile.

[BobHarlem]

Either a mesovortex or the center was found at 16.3N 64.7W - at least at 10,000 feet aloft.

8pm called it as 16.6N 64.9W, and they waited until the last possible second to send that advisory.

[wxman57]

Center is about 60 miles south of St. Croix. Max sustained wind reported over the past 3 hrs is 18 kts gusting 28 kts.

[Hurricane2022]

BULLETIN
Tropical Storm Fiona Intermediate Advisory Number 14A
NWS National Hurricane Center Miami FL AL072022
800 PM AST Sat Sep 17 2022

...LIFE-THREATENING FLOODING AND MUDSLIDES POSSIBLE ACROSS PUERTO
RICO FROM FIONA DURING THE NEXT SEVERAL DAYS...


SUMMARY OF 800 PM AST...0000 UTC...INFORMATION
----------------------------------------------
LOCATION...16.6N 64.9W
ABOUT 75 MI...120 KM S OF ST. CROIX
ABOUT 145 MI...235 KM SE OF PONCE PUERTO RICO
MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H
PRESENT MOVEMENT...WNW OR 285 DEGREES AT 8 MPH...13 KM/H
MINIMUM CENTRAL PRESSURE...998 MB...29.47 INCHES

[skyline385]

Not sure what this is but its something

Seems to be getting destroyed by dry air

[Iceresistance]

BULLETIN
Tropical Storm Fiona Intermediate Advisory Number 14A
NWS National Hurricane Center Miami FL AL072022
800 PM AST Sat Sep 17 2022

...LIFE-THREATENING FLOODING AND MUDSLIDES POSSIBLE ACROSS PUERTO
RICO FROM FIONA DURING THE NEXT SEVERAL DAYS...


SUMMARY OF 800 PM AST...0000 UTC...INFORMATION
----------------------------------------------
LOCATION...16.6N 64.9W
ABOUT 75 MI...120 KM S OF ST. CROIX
ABOUT 145 MI...235 KM SE OF PONCE PUERTO RICO
MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H
PRESENT MOVEMENT...WNW OR 285 DEGREES AT 8 MPH...13 KM/H
MINIMUM CENTRAL PRESSURE...998 MB...29.47 INCHES

It seems like that the NHC has been getting the Extrapolated pressure readings, but we haven't been able to.

[Sciencerocks]

[Iceresistance]

Not sure what this is but its something

Seems to be getting destroyed by dry air

https://i.imgur.com/qLpaavZ.jpeg

I don't think it's dry air that is the problem here, it could be the DMIN since the sun is setting.

[aspen]

Despite the lackluster convection tonight, this is the best Fiona’s structure has been all day. It now has a focused and stacked LLC, as well as a developing eyewall on radar and microwave. Its IR appearance is also quite close to what the 18z HWRF showed for this time.