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Post Tropical Storm Ophelia-Last advisory


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Ophelia passed directly over a NOAA buoy overnight, and it recorded a hearty 84 kt with a gust to 101 kt (at 5 m), with 951.9 mb in the eye. Very nice readings. It's a decent cyclone.

If there's anything interesting about this season, it's that we've been getting good data from the buoys. Lots of direct buoy hits from fish, surprisingly.

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Ophelia passed directly over a NOAA buoy overnight, and it recorded a hearty 84 kt with a gust to 101 kt (at 5 m), with 951.9 mb in the eye. Very nice readings. It's a decent cyclone.

It's impressive that the buoy recorded 84P101kt while it spent half its time in wave troughs of 40 foot seas. This means Ophelia's peak sustained winds/gusts were under-reported, as was the case when major hurricane Floyd passed directly over NOAA buoy 41010 back in 1999.

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It's impressive that the buoy recorded 84P101kt while it spent half its time in wave troughs of 40 foot seas. This means Ophelia's peak sustained winds/gusts were under-reported, as was the case when major hurricane Floyd passed directly over NOAA buoy 41010 back in 1999.

Now that's a tight core4177f2fe-033f-90c6.jpg

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Wow-- that is a nice pressure/wind trace. It looks to me like the highest winds roughly coincided with the lowest pressure-- which would suggest the eye just missed the buoy. (Or perhaps it's just that the trace in't detailed enough to reveal that the peak wind and lowest pressure occurred at different times.)

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Wow-- that is a nice pressure/wind trace. It looks to me like the highest winds roughly coincided with the lowest pressure-- which would suggest the eye just missed the buoy. (Or perhaps it's just that the trace in't detailed enough to reveal that the peak wind and lowest pressure occurred at different times.)

Thankfully that buoy has supplemental data and is a great source of info. The lowest one minute wind at lowest pressure occurrence was 25 KTs, it appears that at least part of the eye went over the buoy.

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Looks to be taking at shot at strengthening before it encounters cooler water tomorrow. It's currently over waters about 28C, which is up some from the 27.5C waters it was over last night and this morning, and in response the eye has warmed since this morning, the eyewall has cooled, and convection is expanding. Satellite estimates have been increasing in response as well.

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8pm takes it to 115kt cat 4

...OPHELIA INTENSIFIES INTO A CATEGORY FOUR HURRICANE AS IT PASSES EAST OF BERMUDA...

SUMMARY OF 800 PM AST...0000 UTC...INFORMATION

----------------------------------------------

LOCATION...32.5N 62.4W

ABOUT 140 MI...220 KM E OF BERMUDA

MAXIMUM SUSTAINED WINDS...135 MPH...215 KM/H

PRESENT MOVEMENT...N OR 10 DEGREES AT 26 MPH...43 KM/H

MINIMUM CENTRAL PRESSURE...944 MB...27.88 INCHES

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