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4 minutes ago, SnoSki14 said:

Here we go Jamaica. Hit a wall, expect N/NNE turn shortly. Also the best its ever looked on satellite.

bPlNpWB.gif

Certainly looks like it. Let's see if this is the beginning of a change towards a north/north east move.

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  • Scott747 changed the title to Major Hurricane Melissa - 909mb - 175mph
17 minutes ago, Scott747 said:

It isn't updating because there isn't a new cone....

Right for those lurking/not familiar with tropical—the intermediate advisories do not have a cone change. That happens at 5am, 11am, 5pm, and 11pm ET when the full advisory is issued. That’s also when we get the technical discussions.

In addition, the width of the cone is based strictly on historical track error, which is defined before the season. 

What you’re seeing tonight is not uncommon at all for imminent coastal threats, especially powerful ones. They can drift/meander/wobble. The best way to track the longer term motion is to use radar and recon center fixes. All the way until landfall. 

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42 minutes ago, MDSnow93 said:

They widened the cone significantly. Much more room off the west coast, and pretty much to the eastern edge.

The 5 pm and 8 pm NHC cones are identical, as they usually are, as I don't recall them ever updating those maps for the intermediate advisories.  Files too large to paste here, which surprises me.  

https://www.nhc.noaa.gov/archive/2025/MELISSA_graphics.php?product=3day_cone_with_line

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9 minutes ago, WxWatcher007 said:

Right for those lurking/not familiar with tropical—the intermediate advisories do not have a cone change. That happens at 11am and 5pm ET when the full advisory is issued. That’s also when we get the technical discussions.

In addition, the width of the cone is based strictly on historical track error, which is defined before the season. 

What you’re seeing tonight is not uncommon at all for imminent coastal threats, especially powerful ones. They can drift/meander/wobble. The best way to track the longer term motion is to use radar and recon center fixes. All the way until landfall. 

And the 5am and 11pm :D 

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image.png.63596ece5080f69b269bc89a6c84170e.png

Look at the radar. heavy rain has been pounding most the island for the past 6 hours. Precip echos surrounding the eye seemed a bit less intense on the radar loop during the last 2-3 hours. Don't know if there is some attenuation involved since Melissa obviously still has great IR presentation. Not sure how long we will have access to radar once the storm moves closer.

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1 minute ago, Wannabehippie said:

NOAA got a 912, 910 and a 907 on its three penetrations. Awaiting word from the AF plane on its second pass.

What's the difference between these and the extrapolated pressures? How do they derive the extrapolated pressures? 

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  • Scott747 changed the title to Major Hurricane Melissa - 903mb - 175mph

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