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Hurricane Sandy - Model and Medium Range Discussion


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I don't know which thread is the banter thread and which one is for the pro fore casters and experienced amateurs, but I just found this out from Paul Douglas's blog.. All NWS stations will now be releasing weather balloons at 6hr interval's for the 1st time ever!!!!

link to his blog...the info is about half way down.

http://pauldouglasweather.blogspot.com/

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I don't know which thread is the banter thread and which one is for the pro fore casters and experienced amateurs, but I just found this out from Paul Douglas's blog.. All NWS stations will now be releasing weather balloons at 6hr interval's for the 1st time ever!!!!

link to his blog...the info is about half way down.

http://pauldouglaswe...r.blogspot.com/

Yeah I think some of us saw that! I think there needs to be some special balloons releases up in the Canadian Maritimes to get a better idea of the heights up that way. To determine whether there will an escape route open or not.

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just saw the canadian global run myself. running it in parallel to Long Island from east to west? damn, i'd like to know what it's smoking. if this storm did that, NYC might see an interesting flooding problem coming up Long Island Sound. would I even want to see the wave model on that one?

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Yeah I think some of us saw that! I think there needs to be some special balloons releases up in the Canadian Maritimes to get a better idea of the heights up that way. To determine whether there will an escape route open or not.

let me be Frank...I agree. I also think that Sandy could ruin several of the winter forecast that have been posted, looks like sea surface temps are going to crash along the eastern seaboard if Sandy doesn't go out to sea.

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let me be Frank...I agree. I also think that Sandy could ruin several of the winter forecast that have been posted, looks like sea surface temps are going to crash along the eastern seaboard if Sandy doesn't go out to sea.

Something to ponder.

EURO shows snow in the high country of WVA - plenty of it too! Storm surge into the Delaware would be awful in this 0z EURO scenario.

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Frankenstorm -- I like it!

======================

PRELIMINARY EXTENDED FORECAST DISCUSSION

NWS HYDROMETEOROLOGICAL PREDICTION CENTER COLLEGE PARK MD

942 AM EDT THU OCT 25 2012

VALID 12Z MON OCT 29 2012 - 12Z THU NOV 01 2012

...HIGH IMPACT MERGING OF ENERGETIC SYSTEMS ANTICIPATED OFF THE

MID ATLANTIC COAST...

PRELIMINARY UPDATE...

DESPITE A MODEST CLUSTER OF OUTLYING DETERMINISTIC SOLUTIONS AND

ENSEMBLE MEMBERS FROM THE VARIOUS MODELING CENTERS, THE LION'S

SHARE OF GUIDANCE INDICATES THAT THE CIRCULATION ASSOCIATED WITH

HURRICANE SANDY WILL PASS CLOSE ENOUGH TO THE AMPLIFYING POLAR

TROUGH OVER THE EASTERN UNITED STATES TO BECOME INCORPORATED INTO

A HYBRID VORTEX OVER THE MID ATLANTIC AND NORTHEAST NEXT TUESDAY.

THE HIGH DEGREE OF BLOCKING FROM EASTERN NORTH AMERICA ACROSS THE

ENTIRE ATLANTIC BASIN IS EXPECTED TO ALLOW THIS UNUSUAL MERGER TO

TAKE PLACE, AND ONCE THE COMBINED GYRE MATERIALIZES, IT SHOULD

SETTLE BACK TOWARD THE INTERIOR NORTHEAST THROUGH HALLOWEEN,

INVITING PERHAPS A GHOULISH NICKNAME FOR THE CYCLONE ALONG THE

LINES OF "FRANKENSTORM", AN ALLUSION TO MARY SHELLEY'S GOTHIC

CREATURE OF SYNTHESIZED ELEMENTS.

AS IS OFTEN THE CASE, WHEN ONE PART OF THE NATION IS EXPERIENCING

A VERY ENERGETIC ATMOSPHERE DISTURBANCE, THE REMAINDER IS

RELATIVELY CALM. THIS EVENT SHOULD NOT PROVE THE EXCEPTION, WITH A

FAIRLY BENIGN FEED OF PACIFIC AIR INTO MOST OF THE WESTERN AND

CENTRAL STATES. THE FAR WEST, PARTICULAR NORTH OF CALIFORNIA, WILL

HAVE ENOUGH SUSTAINED ONSHORE FLOW TO KEEP THE PERIOD WET AND

UNSETTLED.

CISCO

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:lol: at the NAM solution. Seems like since it's too weak and not capturing the storm well as a whole, it's creating pressure falls near it's strongest convective bands well away from the circulation center, allowing the low to follow the convection in a loop around the storm's actual center.
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That's a large change from 48 hours ago as I recall. However, the spread at days 4 and 5 are very large. Do you know how they calculate the ellipses??

From the HFIP website:

"Description of ellipse: The colored ellipses indicate the region that 90% of the ensemble member tracks occupy for a given valid time. This can be interpreted as the region the tropical cyclone will be in with 90% confidence based on that particular ensemble forecast.

Tropical cyclone tracks from each individual ensemble member are shown in gray. The mean track position is plotted with the heavy black line. Colors correspond the valid forecast time, in days since initialization, with the colored number indicating the number of days. "

A lot of good data on their website for those interested.

http://www.hfip.org/products/

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GFS 945 Long Island at 00Z Wed. Ruh Roh Scooby, we have Superstorm 12......

I'm just glad the GFS has finally joined reality with the rest of the models.

Now where on the coast can we look for a landfall? I'd like to wait for the Euro, but anywhere between Cape May and Montauk looks at high risk at the moment.

(I forgot we split the threads :\)

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I think it would be beneficial to everyone when someone posts model ouput if the following information is also provided.

1) MB at landfall

2) Winds at landfall (MPH) sustained and gusts

3) Amount of Rainfall with an x amount of time around landfall.

I think there are a lot of misconceptions on this board that because that low is at x millibars the winds must be at x mph or a Cat x Hurricane, etc.

Thoughts?

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I think it would be beneficial to everyone when someone posts model ouput if the following information is also provided.

1) MB at landfall

2) Winds at landfall (MPH) sustained and gusts

3) Amount of Rainfall with an x amount of time around landfall.

I think there are a lot of misconceptions on this board that because that low is at x millibars the winds must be at x mph or a Cat x Hurricane, etc.

Thoughts?

Items 2 and 3 won't be anything more than educated guesses at this point. 3 especially.

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