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Hurricane Sandy/Potential EC Event Discussion Part II


free_man

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I'm going to go out on a limb and say the GFS will verify and the storm will take the classic path between Bermuda and the east coast and maybe hit eastern Nova Scotia or Newfoundland. Also, isn't it true that usually when the GFS and the Euro are completely different... doesn't the GFS usually prevail? I guess the thought of having an Epic Storm... like Hazel was fun while it lasted. Now reality sets in. I was going to buy batteries and more gas... now I'm doing nothing. I live right on the central CT coast. Maybe some showers and gusts to 20.

In my experience, definitely not... other way around (usually).

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It's still early. At least personally I wouldn't do anything until Friday afternoon or so. If I had a boat in the water I'd probably try to get it out now but other than that I think it's still really early in all of this.

I'd rather grab anything now or tomorrow while stores are relatively quiet as long as it's stuff that won't go to waste if the storm misses. Also stuff like checking generators and sump pumps to make sure they're operational. That's about the entirety of my preparation anyway.

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I'm going to go out on a limb and say the GFS will verify and the storm will take the classic path between Bermuda and the east coast and maybe hit eastern Nova Scotia or Newfoundland. Also, isn't it true that usually when the GFS and the Euro are completely different... doesn't the GFS usually prevail? I guess the thought of having an Epic Storm... like Hazel was fun while it lasted. Now reality sets in. I was going to buy batteries and more gas... now I'm doing nothing. I live right on the central CT coast. Maybe some showers and gusts to 20.

Also, isn't it true that usually when the GFS and the Euro are completely different... doesn't the GFS usually prevail?

No, in fact, it's the EXACT opposite!

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Interesting factoid I read over at Accuweather and something to remind folks to remember how rare (and unlikely) it will be for all this to come together perfectly:

No Oct/Nov/Dec storm that had ever reached Category 3 has made landfall north of Florida since 1900 - in fact, no storm in any month after 1900 has maintained at least cat 3 status anywhere close to the NE coast except for Esther in 1961.

http://www.accuweather.com/en/weather-blogs/weathermatrix/sandy-the-superstorm/622903

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Interesting factoid I read over at Accuweather and something to remind folks to remember how rare (and unlikely) it will be for all this to come together perfectly:

No Oct/Nov/Dec storm that had ever reached Category 3 has made landfall north of Florida since 1900 - in fact, no storm in any month after 1900 has maintained at least cat 3 status anywhere close to the NE coast except for Esther in 1961.

http://www.accuweath...perstorm/622903

What??

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Others can chime in with anything else to add, but I'd argue that the size of the storm generally would play more of factor than CP reading.

Something I considered is that with PV anomalies, the stronger the hurricane is, the stronger the associated circulation with the PV anomaly that repels the PV anomaly in the trough to the west, making phasing more difficult.

Thoughts?

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It would not surprise me if Sandy is a Category 2 hurricane by the time it makes a 2nd land fall. It clearly attended superior structure despite passing over land - interestingly, Jamaica boasts some 6 and 7 thousand foot peaks where Sandy passed over. It has a concentric ring structure and very clearly discerned eye now, and the water it will be passing over during the next 70 miles is deep with oceanic heat content. Shear is still not an issue.

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It would not surprise me if Sandy is a Category 2 hurricane by the time it makes a 2nd land fall. It clearly attended superior structure despite passing over land - interestingly, Jamaica boasts some 6 and 7 thousand foot peaks where Sandy passed over. It has a concentric ring structure and very clearly discerned eye now, and the water it will be passing over during the next 70 miles is deep with oceanic heat content. Shear is still not an issue.

Cuba has more landmass but obviously depends on which part of the island it passes over and at what speed.

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Also, isn't it true that usually when the GFS and the Euro are completely different... doesn't the GFS usually prevail?

No, in fact, it's the EXACT opposite!

I don't have too many examples right now but the first ones I can think of are 12/13/10, 12/26/10 and 10/29/11. The ECM and GFS were different, the ECM was more consistent than the GFS, and the GFS ended up caving to the ECM. It's not like that in every situation but from what I've observed in many cases the ECM prevails more frequently than the GFS.

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One note on the Boxing Day model mayhem... I clearly remember the Euro showing it first, then the GFS showed it, then they both lost it. Then the GFS was the first to bring it back as it was the first to initialize with the newest RAOB data.

Yeah overall the Euro killed the GFS in that storm in the D4-5 lead time. Euro was the last model to lose it around D3 but then it got back on board the same run the GFS had the big change to a hit. Everyone thinks the GFS got it before the other models when it came back...but that is only because its graphics come out first. It was the same run where the Euro came back too...the 12z Dec 24th run.

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You betcha, actually I think all guidance brought it back with that run. I know there was an issue of under estimating the strenghth of the main vort max in the northern stream.

Yeah overall the Euro killed the GFS in that storm in the D4-5 lead time. Euro was the last model to lose it around D3 but then it got back on board the same run the GFS had the big change to a hit. Everyone thinks the GFS got it before the other models when it came back...but that is only because its graphics come out first. It was the same run where the Euro came back too...the 12z Dec 24th run.

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Interesting factoid I read over at Accuweather and something to remind folks to remember how rare (and unlikely) it will be for all this to come together perfectly:

No Oct/Nov/Dec storm that had ever reached Category 3 has made landfall north of Florida since 1900 - in fact, no storm in any month after 1900 has maintained at least cat 3 status anywhere close to the NE coast except for Esther in 1961.

http://www.accuweather.com/en/weather-blogs/weathermatrix/sandy-the-superstorm/622903

What about Hazel?

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Yeah overall the Euro killed the GFS in that storm in the D4-5 lead time. Euro was the last model to lose it around D3 but then it got back on board the same run the GFS had the big change to a hit. Everyone thinks the GFS got it before the other models when it came back...but that is only because its graphics come out first. It was the same run where the Euro came back too...the 12z Dec 24th run.

continue good juju and start another thread for 0z?

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