ATL: SALLY - Post-Tropical - Discussion

[CrazyC83]

But the oil rig's winds are measured well above the ground.

It says its elevation is 53ft.

Thanks. How does 91 mph sustained at 53 feet correlate to official wind measurements? At what elevation are official taken? And is that oil rig measurement reliable?

That's only slightly above standard elevation (33 feet). Probably would equal about 85 mph at the surface.

[NDG]

But the oil rig's winds are measured well above the ground.

It says its elevation is 53ft.

That would support at least 75 kt as well. Possibly 80 kt.

It is not at 53 ft, according to the Nat'l buoy website it is at 160 meters, which sounds right for an oil rig. This is the oil rig that reported wind gusts to ~117 mph wind gusts yesterday early in the afternoon.


Anemometer height: 160 m above site elevation

https://www.ndbc.noaa.gov/station_page.php?station=kvoa

[Dean4Storms]

But the oil rig's winds are measured well above the ground.

It says its elevation is 53ft.

Thanks. How does 91 mph sustained at 53 feet correlate to official wind measurements? At what elevation are official taken? And is that oil rig measurement reliable?

Not sure on those questions but with what Recon was finding in the SW to NE pass I think its fairly reliable.

[Dean4Storms]

It says its elevation is 53ft.

That would support at least 75 kt as well. Possibly 80 kt.

It is not at 53 ft, according to the Nat'l buoy website it is at 160 meters, which sounds right for an oil rig. This is the oil rig that reported wind gusts to ~117 mph wind gusts yesterday early in the afternoon.


Anemometer height: 160 m above site elevation

https://www.ndbc.noaa.gov/station_page.php?station=kvoa

OK, weird, must be the platform at 53ft. Still a substantial wind in the SE quad even at that height.

[NDG]

Here's the VDM

URNT12 KNHC 152355
VORTEX DATA MESSAGE AL192020
A. 15/23:36:40Z
B. 29.60 deg N 088.03 deg W
C. 700 mb 2887 m
D. 976 mb
E. 040 deg 13 kt
F. OPEN S
G. C32
H. 73 kt
I. 248 deg 19 nm 23:31:00Z
J. 329 deg 66 kt
K. 248 deg 19 nm 23:31:00Z
L. 65 kt
M. 072 deg 33 nm 23:46:00Z
N. 155 deg 85 kt
O. 072 deg 34 nm 23:46:30Z
P. 12 C / 3046 m
Q. 16 C / 3053 m
R. 9 C / NA
S. 12345 / 7
T. 0.02 / 3.5 nm
U. AF305 1219A SALLY OB 05
MAX FL WIND 85 KT 072 / 34 NM 23:46:30Z
;

[wx98]

Roughly 45 miles SSE of Gulf Shores moving NNE or NE. I give it 6-8 hours.

[supercane4867]

FL wind per VDM supports 75kts

[SETXstorms]

definite eastward shift on radar

[NDG]

That would support at least 75 kt as well. Possibly 80 kt.

It is not at 53 ft, according to the Nat'l buoy website it is at 160 meters, which sounds right for an oil rig. This is the oil rig that reported wind gusts to ~117 mph wind gusts yesterday early in the afternoon.


Anemometer height: 160 m above site elevation

https://www.ndbc.noaa.gov/station_page.php?station=kvoa

OK, weird, must be the platform at 53ft. Still a substantial wind in the SE quad even at that height.

It makes sense the anemometer is that high up because its wind reports have been much higher than surrounding buoys and even SFMR since yesterday.

[eastcoastFL]

I'd keep it at 70 kt though, since the SFMR is more uncertain in very shallow water (such as the northern Gulf shelf water).

I don't know, posted that link awhile back with that oil rig recording 91mph sustained and gusts over 100mph and SE of the Center.

https://www.wrh.noaa.gov/mesowest/timeseries.php?sid=KVOA&num=72&banner=gmap&raw=0&w=325

But the oil rig's winds are measured well above the ground.

I think its 160 meters up and then the anemometer is on top of that so its a little higher up. According to wxman its never calibrated.

[DestinHurricane]

I don't know, posted that link awhile back with that oil rig recording 91mph sustained and gusts over 100mph and SE of the Center.

https://www.wrh.noaa.gov/mesowest/timeseries.php?sid=KVOA&num=72&banner=gmap&raw=0&w=325

But the oil rig's winds are measured well above the ground.

I think its 160 meters up and then the anemometer is on top of that so its a little higher up. According to wxman its never calibrated.

Platform is 53 feet. Anemometer is 160 meters up.

[NDG]

I don't know, posted that link awhile back with that oil rig recording 91mph sustained and gusts over 100mph and SE of the Center.

https://www.wrh.noaa.gov/mesowest/timeseries.php?sid=KVOA&num=72&banner=gmap&raw=0&w=325

But the oil rig's winds are measured well above the ground.

I think its 160 meters up and then the anemometer is on top of that so its a little higher up. According to wxman its never calibrated.

According to him, but how does he know.
With helicopters landing on oil rigs all the time, especially that one with an official airport code, it has to be accurate and calibrated.

[wx98]

FWIW, the missing data is now on TT.

[Bamagirl2408]

This is the most I have ever posted probably because this one is actually close. I susally just read and don't log in. I thought by following it was headed into the panhandle, its southeast of gulf shores, headed nine etc but the NHc has it at 88 west headed 350 degrees. Which is accurate? Love the site. It gets confusing though.

[DestinHurricane]

This is the most I have ever posted probably because this one is actually close. I susally just read and don't log in. I thought by following it was headed into the panhandle, its southeast of gulf shores, headed nine etc but the NHc has it at 88 west headed 350 degrees. Which is accurate? Love the site. It gets confusing though.

Just follow radar and recon, it will be wobbling.

[Janie2006]

Windy and rainy in Mobile, big surprise, yea?

Parts of Midtown around Oakleigh and Ann Street are without power, but that area is filled with old oak trees that will drop branches on the power lines in a hurry. No way of accurately measuring wind speed, but gusts have been TS force. Certainly enough to nudge the Mazda as I was driving home an hour ago.

[NDG]

Interesting facts about the famous oil rig.

https://www.facebook.com/drillingformul ... =1&theater

[eastcoastFL]

But the oil rig's winds are measured well above the ground.

I think its 160 meters up and then the anemometer is on top of that so its a little higher up. According to wxman its never calibrated.

Platform is 53 feet. Anemometer is 160 meters up.

Ok. Makes sense.

[FLpanhandle91]

80kt flight level winds in NE quad according to recon. Sally is going to make a run at 85 knots here pretty quickly.

[NDG]

Enough dry air got in it to clear out the eye.