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NE Tropical Thread


free_man

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As a tool to raise awareness and preparedness for a storm yes, but it does have its place in allowing an comparison of one hurricane (the storm itself - not the impacts) to another. If an F5 tornado goes across an open prarie, is it still an F5 tornado? Yes it is, but it's impact where people live would make it a different story.

Since the NWS's mission is to provde warnings to protect life and property, I think we need some kind of storm category scale that take into account the total impacting a given area. Such a scale could be used for many types of storms and would help sway the concept that tropical storm or category one hurricane isn't that bad. You might even be able to assign a storm category by county since the storm will have different impacts in different counties. I think Irene showed that you can have a high impact and not even be on the SS scale so we need something else - I'll agree with that.

Apologies for joining this late and missing earlier discussion (am usually in the NYC forum anyway!), but in this vein NWS offices in conjunction with NHC are providing experimental Tropical Cyclone Impact Graphics: http://w1.weather.gov/tcig

The idea behind these graphics is to inform people what they should prepare for, which can often be different from what they should actually expect/experience. Also helps take focus off the forecast track of the storm center, while taking the "cone of uncertainty" and other probabilistic wind, storm surge, inland flooding, and tornado threat guidance into account.

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Apologies for joining this late and missing earlier discussion (am usually in the NYC forum anyway!), but in this vein NWS offices in conjunction with NHC are providing experimental Tropical Cyclone Impact Graphics: http://w1.weather.gov/tcig

The idea behind these graphics is to inform people what they should prepare for, which can often be different from what they should actually expect/experience. Also helps take focus off the forecast track of the storm center, while taking the "cone of uncertainty" and other probabilistic wind, storm surge, inland flooding, and tornado threat guidance into account.

I thought these were a great set of products. Something that can also be communicated by on air mets. It was broke down into regions and the impacts were spelled out.

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Apologies for joining this late and missing earlier discussion (am usually in the NYC forum anyway!), but in this vein NWS offices in conjunction with NHC are providing experimental Tropical Cyclone Impact Graphics: http://w1.weather.gov/tcig

The idea behind these graphics is to inform people what they should prepare for, which can often be different from what they should actually expect/experience. Also helps take focus off the forecast track of the storm center, while taking the "cone of uncertainty" and other probabilistic wind, storm surge, inland flooding, and tornado threat guidance into account.

Right off the bat I love this.

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Apologies for joining this late and missing earlier discussion (am usually in the NYC forum anyway!), but in this vein NWS offices in conjunction with NHC are providing experimental Tropical Cyclone Impact Graphics: http://w1.weather.gov/tcig

The idea behind these graphics is to inform people what they should prepare for, which can often be different from what they should actually expect/experience. Also helps take focus off the forecast track of the storm center, while taking the "cone of uncertainty" and other probabilistic wind, storm surge, inland flooding, and tornado threat guidance into account.

Bill... these are wonderful. I'm excited to see them used in the future.

At the end of the day its coordination between NWS, emergency management, and media that gets the job done. Graphics like this are an easy way to communicate... especially to weather people who aren't mets (there are enough of those) and to people in newsrooms, government, etc. who don't have a met degree.

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URGENT - IMMEDIATE BROADCAST REQUESTED

CIVIL EMERGENCY MESSAGE

LOUISIANA EMERGENCY MANAGEMENT AGENCY NEW ORLEANS LOUISIANA

RELAYED BY NATIONAL WEATHER SERVICE NEW ORLEANS LA

1108 AM CDT THU AUG 30 2012

THE FOLLOWING MESSAGE IS TRANSMITTED AT THE REQUEST OF THE

MISSISSIPPI EMERGENCY MANAGEMENT AGENCY.

A MANDATORY EVACUATION HAS BEEN ORDERED FOR ALL LOW LYING AREAS

AND ALONG THE TANGIPAHOA RIVER DUE TO THE POTENTIAL FAILURE OF THE

LAKE TANGIPAHOA DAM...ALSO KNOWN AS THE PERCY QUIN DAM...IN

SOUTHERN MISSISSIPPI. AGAIN...A MANDATORY EVACUATION HAS BEEN

ORDERED FOR ALL LOW LYING AREAS AND ALONG THE TANGIPAHOA RIVER DUE

TO THE POTENTIAL FAILURE OF THE LAKE TANGIPAHOA DAM...ALSO KNOWN

AS THE PERCY QUIN DAM...IN SOUTHERN MISSISSIPPI.

DUE TO THE DAM FAILURE...WATER LEVELS ON THE TANGIPAHOA RIVER NEAR

CHATAWA AND OSYKA WILL RISE QUICKLY. NEAR OSYKA...THE RIVER WILL

RISE TO NEAR 21.5 FEET. THIS WILL BREAK THE RECORD PREVIOUSLY SET

IN 1997. AT 21 FEET...THE RIVER WILL THREATEN THE ROADWAY APPROACH

TO HIGHWAY 584 AND WILL INUNDATE THE SURROUNDING AREAS. IF YOU

LIVE IN THESE AREAS...LEAVE IMMEDIATELY FOR HIGHER GROUND.

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Bill... these are wonderful. I'm excited to see them used in the future.

At the end of the day its coordination between NWS, emergency management, and media that gets the job done. Graphics like this are an easy way to communicate... especially to weather people who aren't mets (there are enough of those) and to people in newsrooms, government, etc. who don't have a met degree.

They are fantastic and used by NO on their web page, apparently ignored by some, emergency and local officials and residents as shown in the articles I posted above. Communication and dessimination are vital.

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Bill... these are wonderful. I'm excited to see them used in the future.

They've been available since 2008 or 2009, but really came into focus last year for Irene and this year for Isaac. Keep in mind they're experimental...addressing storm surge impacts can be especially tricky.

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NHC has Leslie being picked up by the mid-Atlantic trough and recurving out to sea...EAST OF BERMUDA--lol-not even close.

One of the biggest factors that make it so tough to get a TC up here is all the troughs and fronts over and moving through this region, Timing has to be just right

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NHC has Leslie being picked up by the mid-Atlantic trough and recurving out to sea...EAST OF BERMUDA--lol-not even close.

where did you read that?

120H 04/1200Z 27.0N 61.0W 80 KT 90 MPH

THERE IS A LOT OF UNCERTAINTY

IN THE LONG RANGE RELATED TO WHETHER THE SYSTEM RECURVES AHEAD OF

THE TROUGH OR GETS TRAPPED BENEATH A REBUILDING RIDGE.

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where did you read that?

120H 04/1200Z 27.0N 61.0W 80 KT 90 MPH

THERE IS A LOT OF UNCERTAINTY

IN THE LONG RANGE RELATED TO WHETHER THE SYSTEM RECURVES AHEAD OF

THE TROUGH OR GETS TRAPPED BENEATH A REBUILDING RIDGE.

they have a graphical depiction on the website...

-

granted things can change, I get that, but like dryslot said, odds are against it unless everything is perfect...given how much latitude it's going to gain, hard to see how it doesnt escape IMO

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they have a graphical depiction on the website...

-

granted things can change, I get that, but like dryslot said, odds are against it unless everything is perfect...given how much latitude it's going to gain, hard to see how it doesnt escape IMO

Just saw the update, yep I agree, maybe some surf if we can get it inside Bermuda alittle

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From Josh's chase summary...

Impressive Cat 1. Isaac is a great reminder that a hurricane is a hurricane—and even a Category 1 is serious business. The storm was large and powerful, raking a large region with devastating winds and storm surge.

I read something from someone who rode out the storm that it was just a Cat. 1, so they just figured they'd ride it out - this was after being rescued.

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From Josh's chase summary...

Impressive Cat 1. Isaac is a great reminder that a hurricane is a hurricane—and even a Category 1 is serious business. The storm was large and powerful, raking a large region with devastating winds and storm surge.

I read something from someone who rode out the storm that it was just a Cat. 1, so they just figured they'd ride it out - this was after being rescued.

No 2 systems are alike, If they tell you to evacuate and your in a prone area, You might want to think about paying attention, Unfortunately, Common sense can't be taught

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No 2 systems are alike, If they tell you to evacuate and your in a prone area, You might want to think about paying attention, Unfortunately, Common sense can't be taught

Seriously...if u can throw ur alarm clock out ur window, have it bounce off the levee protecting ur below sea level house! You need to leave when a hurricane is coming

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upper level pattern on the op gfs is actually ideal for SNE landfall...it's unforntuate that the storm is so far north and east before it's start it's recurvature. Op EC isn't nearly as ideal. GFS and EC Ensembles have the more flat midwest trough the Op EC has. The GFS/Euro both recurve this between Bermuda and SNE...and the ensembles just to the east of Bermuda. I'd be leaning that way at this point.

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upper level pattern on the op gfs is actually ideal for SNE landfall...it's unforntuate that the storm is so far north and east before it's start it's recurvature. Op EC isn't nearly as ideal. GFS and EC Ensembles have the more flat midwest trough the Op EC has. The GFS/Euro both recurve this between Bermuda and SNE...and the ensembles just to the east of Bermuda. I'd be leaning that way at this point.

That's really the key, imo. The synoptic pattern is favorable next weekend for a US landfall, but the storm has to stay far enough south and west for it to have a chance. Otherwise, it will just be another Earl or Bill.

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