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Tropical Storm Henri


wxeyeNH
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7 minutes ago, WxWatcher007 said:

That was one hell of a run. That’s as anomalous as it gets with a loop like that over SNE (not out at sea). Also note that the GFS is consistent in showing weakening on final approach. 

Probably not a whole helluva lot of scientific merit in making the following statement...  buuut,

I don't like it when models get cutesy with loops and weird stalls when handling a type of phenomenon where predicting those aspects has almost never been achieved - very well at least.  Perhaps the state of the art with that sort of thing is better ... but D4?  My experience is that it could just as well mean the entire handling can be disrupted in future runs - and that probably in spirit does have merit. But, I mean, I almost wonder if we should considering it a negative in deterministic.

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5 minutes ago, Typhoon Tip said:

Probably not a whole helluva lot of scientific merit in making the following statement...  buuut,

I don't like it when models get cutesy with loops and weird stalls when handling a type of phenomenon where predicting those aspects has almost never been achieved - very well at least.  Perhaps the state of the art with that sort of thing is better ... but D4?  My experience is that it could just as well mean the entire handling can be disrupted in future runs - and that probably in spirit does have merit. But, I mean, I almost wonder if we should considering it a negative in deterministic.

I could see Henri come north towards New England, stall out south of us but far enough so that it does not cause extensive disruption and slowly spin down as it waits for the high to move out and then resumes a NE motion.  In any event a path 200 miles SE of Nantucket seems less and less likely.  

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5 minutes ago, wxeyeNH said:

I could see Henri come north towards New England, stall out south of us but far enough so that it does not cause extensive disruption and slowly spin down as it waits for the high to move out and then resumes a NE motion.  In any event a path 200 miles SE of Nantucket seems less and less likely.  

Certainly not impossible, no -

 

'loops' to me are almost like resolving uncertaing causes the loop more so.  Lol... Half kidding.   Loops do happen, but blah blah

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ATCF IDENTIFIER : AL082021 LEAD CENTRAL MAXIMUM WIND VERIFYING TIME TIME POSITION PRESSURE (MB) SPEED (KNOTS) -------------- ---- -------- ------------- ------------- 1200UTC 18.08.2021 0 29.9N 66.1W 1004 40 0000UTC 19.08.2021 12 29.7N 68.4W 999 51 1200UTC 19.08.2021 24 29.5N 70.6W 987 61 0000UTC 20.08.2021 36 29.5N 72.5W 983 63 1200UTC 20.08.2021 48 30.0N 73.9W 981 65 0000UTC 21.08.2021 60 31.3N 74.3W 976 68 1200UTC 21.08.2021 72 33.7N 73.2W 961 85 0000UTC 22.08.2021 84 37.4N 71.3W 960 81 1200UTC 22.08.2021 96 41.1N 70.2W 962 79 0000UTC 23.08.2021 108 42.4N 69.9W 986 46 1200UTC 23.08.2021 120 43.0N 68.0W 996 35 0000UTC 24.08.2021 132 43.4N 65.5W 1003 27 1200UTC 24.08.2021 144 44.2N 62.5W 1005 25

Doesn't copy well but this is the last UKMET TC guidance. I think it goes over the cape as it weakens? 

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This NAO curve does support some semblance of blocking ... I mean the NAO domain is large enough - it could be more so over the eastern vs western limb where that takes place.  But since the modest blocking that rolls over top and settles S of NS seems want to be the primary conductor in sending Henri circuitously as does ( GFS), having this synoptic super-structural indicator is probably fitting -

 

Ensemble Mean NAO Outlook

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6 minutes ago, OSUmetstud said:

 

ATCF IDENTIFIER : AL082021 LEAD CENTRAL MAXIMUM WIND VERIFYING TIME TIME POSITION PRESSURE (MB) SPEED (KNOTS) -------------- ---- -------- ------------- ------------- 1200UTC 18.08.2021 0 29.9N 66.1W 1004 40 0000UTC 19.08.2021 12 29.7N 68.4W 999 51 1200UTC 19.08.2021 24 29.5N 70.6W 987 61 0000UTC 20.08.2021 36 29.5N 72.5W 983 63 1200UTC 20.08.2021 48 30.0N 73.9W 981 65 0000UTC 21.08.2021 60 31.3N 74.3W 976 68 1200UTC 21.08.2021 72 33.7N 73.2W 961 85 0000UTC 22.08.2021 84 37.4N 71.3W 960 81 1200UTC 22.08.2021 96 41.1N 70.2W 962 79 0000UTC 23.08.2021 108 42.4N 69.9W 986 46 1200UTC 23.08.2021 120 43.0N 68.0W 996 35 0000UTC 24.08.2021 132 43.4N 65.5W 1003 27 1200UTC 24.08.2021 144 44.2N 62.5W 1005 25

Doesn't copy well but this is the last UKMET TC guidance. I think it goes over the cape as it weakens? 

Yep pretty identical track to 0z. 

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