Hurricane Mathew - off topic

[rgleason]

It does not look too good for Florida or the whole southeastern coast.
Batten down and be safe guys! @ bdbcat & K

https://www.wunderground.com/hurrica...ricane-Matthew

[bdbcat]

Rick...

In NC, preparing. Not much coding going on this week, I'm afraid.

Thanks
d & k

[puffcard]

Nothing off topic about Mathew, going to impact a lot of boaters up and down the eastcoast

[seandepagnier]

The boatyard offered to haul me for free 1 week ago for matthew... I decided to ride it out. Never got more than 35 knots.

[rgleason]

Sean, you're a very lucky guy.

I wonder what's going to happen with Mathew and Nicole coming in from Bermuda....collision? love? Not much chance of Mathew moving out I think, in fact Mathew may easily go further west and right up the entire NE coast too. He starts moving a lot faster and is off Montauk on Sunday. What happens to Nicole?
Hurricane MATTHEW

I will try to hauled tomorrow. Secure and Be safe

http://www.nhc.noaa.gov/refresh/grap...oop?#wcontents

Its category 4 and what are the chances it will be less than 2 when it gets here at 2pm Sunday? Not great. Particularly with its speed. With Nicole spinning counterclockwise, and bouncing on Matthew who's winds are headed in the other direction on the east side, there will be a dance and Matthew looks like he'll take a step sideways towards land, but has anyone seen this before?

https://www.wunderground.com/hurrica...tthew?map=5day

[rgleason]

The spagetti model does not appear to be so dire for NE
Spaghetti Models | Cyclocane

70-80 knots Catagory 1 UTC: 2016-10-09T18:00:00.000Z

[cagney]

We were very lucky in Grenada, that Matthew did not form a day or two earlier.
It was quite undramatic here but could easily been much worse.

Too see two hurricanes interact, Google for "twin typhoons". If my memory serves me right, there is even an example of two typhoons spinning around a common center.

We keep our fingers crossed for all you guys in Bahamas & US East Coast. Be prepared and stay safe!

Thomas & Patricia

[GordMay]

An NHC spokesman said that hurricane Mathew and t-storm Nicole were "separate entities" and would not affect each other.

[Blue Crab]

We caught a big break this morning with the new easterly track. I was heading inland but starting to think I'll sit tight here in the SOBX.

[bdbcat]

Hi folks...

Back online here in Oriental, NC.

We rode out the western edge of Matthew anchored in a small creek protected by tall pines. No fetch.

Forecast: 35-40 Kts, NE.

Actual: Three hours of T-S strength north winds, peak gust observed as 72 Kts. Rocna in soft mud held until gusts to 50+ Kts. Deployed Fortress on short scope, combination held with occasional engine-ahead assist.

'Twas a long night. Recovering anchors from their trip to China took a while.

But no damage on board, power is back on ashore, and we are back in the saddle. And glad to be here, with a new appreciation of the square-law function for wind dynamic pressure...

Dave & Kathi

[CarlF]

Dave,

We may be making the same point, but I believe that wind pressure is a function of the cube of wind speed. A 2x change in wind speed means an 8x change in wind pressure on the boat.

All the more impressive that your anchors held.

[cagney]

Thanks for the report. We were a wee bit concerned.

Thomas

[Gnomon]

Originally Posted by CarlF

Dave,

We may be making the same point, but I believe that wind pressure is a function of the cube of wind speed. A 2x change in wind speed means an 8x change in wind pressure on the boat.

All the more impressive that your anchors held.

From Centraleurope, a link to calculate the drag of gasflow:

Drag Force, Velocity, and Area Calculation

[StuM]

Originally Posted by CarlF

Dave,

We may be making the same point, but I believe that wind pressure is a function of the cube of wind speed. A 2x change in wind speed means an 8x change in wind pressure on the boat.

All the more impressive that your anchors held.

Square when you are considering the pressure on the boat.
Wind pressure can be approximated by: Pressure = ½ x (density of air) x (wind speed)2 x (shape factor)

The cube factor is relevant where you are considering kinetic energy in the wind. Simply put, the faster the air is moving, the more air is moved in a unit time so you have to multiply the pressure by the velocity again to account for the additional mass passing a point in a given time. It is more relevant to how much energy you can get out of a wind generator than to how much force is applied to an anchored boat.

[Fortress]

Originally Posted by bdbcat

Hi folks...

Back online here in Oriental, NC.

We rode out the western edge of Matthew anchored in a small creek protected by tall pines. No fetch.

Forecast: 35-40 Kts, NE.

Actual: Three hours of T-S strength north winds, peak gust observed as 72 Kts. Rocna in soft mud held until gusts to 50+ Kts. Deployed Fortress on short scope, combination held with occasional engine-ahead assist.

'Twas a long night. Recovering anchors from their trip to China took a while.

But no damage on board, power is back on ashore, and we are back in the saddle. And glad to be here, with a new appreciation of the square-law function for wind dynamic pressure...

Dave & Kathi

Dave & Kathi,

Glad to hear that our anchor helped to keep you safe!

All the best,
Brian


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