Page 1 of 1

NWP Tsunami warning

Posted: Tue Jan 23, 2018 12:35 pm
by Highlander
this happened 2.30 am this morn
was down at the boat tide trying to go out wind blowing the water in watching a big whirlpool of the docks 1-2ft waves coming up the gorge wind gusts to 80km/h boat is healing 15% at the dock & my three 8" dock fenders r crushed down to 4" & squeezed down to 2" on the big gusts so after watching the side of the hull flexing like crazy under the pressure of the wind blowing her against the docks I added a forth dock fender what a struggle that was :x will go back down later when the winds die down & install another 8" fender giving me five *' dock fenders out
The Tsumani Warning was cancelled around 6am good job as I might have been looking for another boat along with many other,s
https://www.theweathernetwork.com/news/ ... ake/94206/

https://www.theweathernetwork.com/ca/al ... a/victoria



J

Re: NWP Tsunami warning

Posted: Wed Jan 24, 2018 7:14 am
by Ixneigh
Are you in a place you could put to sea to avoid the waves?
Ix

Re: NWP Tsunami warning

Posted: Wed Jan 31, 2018 12:06 pm
by Highlander
Ixneigh wrote:Are you in a place you could put to sea to avoid the waves?
Ix
I'd think that would be a foolish thing to b doing as it could have had a potential of 100ft waves

J

Re: NWP Tsunami warning

Posted: Wed Jan 31, 2018 1:01 pm
by paul I
Highlander wrote:
Ixneigh wrote:Are you in a place you could put to sea to avoid the waves?
Ix
I'd think that would be a foolish thing to b doing as it could have had a potential of 100ft waves

J
I always thought the powers that be considered being out to sea as the safest place in the event of a Tsunami? The reasoning being that even though there may be a 100ft waves, the rise and fall of the ocean level is slow and smooth. The damage doesn't occur until the 100ft wave hits the shallows, at which point the water has no where else to go but up and on shore.

Re: NWP Tsunami warning

Posted: Wed Jan 31, 2018 1:09 pm
by sailboatmike
paul I wrote:The damage doesn't occur until the 100ft wave hits the shallows, at which point the water has no where else to go but up and on shore.
The point is that there are no 100 foot waves until it hits the shallows, then all the water pushes into a small area which creates the huge waves, ships always head out into open water in such conditions so they have searoom and can float and maneuver over the much smaller waves before it hits the shallows and becomes very high and very steep

Re: NWP Tsunami warning

Posted: Wed Jan 31, 2018 4:52 pm
by Ixneigh
The mac can beat all the other sail boats to the calmest spot too 8)

Re: NWP Tsunami warning

Posted: Thu Feb 01, 2018 4:47 pm
by Highlander
sailboatmike wrote:
paul I wrote:The damage doesn't occur until the 100ft wave hits the shallows, at which point the water has no where else to go but up and on shore.
The point is that there are no 100 foot waves until it hits the shallows, then all the water pushes into a small area which creates the huge waves, ships always head out into open water in such conditions so they have searoom and can float and maneuver over the much smaller waves before it hits the shallows and becomes very high and very steep
I don,t know where u got that Idea go on youtube they have all kinds of vids with commercial ships out in the middle of deep Oceans plowing through all kinds of 75-100ft waves in big storms there is even one of a US aircraft carrier with a 100ft waves sweeping across its decks was totally amazing that the planes on deck stayed put , but I,m sure they would have had some kind of damage , do u realize how much HP would b required to get over the top of a 100ft swell :o

Just sayin that,s all

J 8)

Re: NWP Tsunami warning

Posted: Thu Feb 01, 2018 6:10 pm
by Ponaldpe
Highlander wrote:
sailboatmike wrote:
paul I wrote:
I don,t know where u got that Idea go on youtube they have all kinds of vids with commercial ships out in the middle of deep Oceans plowing through all kinds of 75-100ft waves in big storms there is even one of a US aircraft carrier with a 100ft waves sweeping across its decks was totally amazing that the planes on deck stayed put , but I,m sure they would have had some kind of damage , do u realize how much HP would b required to get over the top of a 100ft swell :o

Just sayin that,s all

J 8)
In 1973 I was on one of those big gray boat with waves braking over the bow big waves , I think the bow was 130ft to the water. I never ever want to do that again, Once was enough ,, been their done that did not get the T-shirt. Was a fun ride at the time but I was much younger.

Re: NWP Tsunami warning

Posted: Fri Feb 02, 2018 5:14 am
by paul I
Highlander wrote:
sailboatmike wrote:
paul I wrote:The damage doesn't occur until the 100ft wave hits the shallows, at which point the water has no where else to go but up and on shore.
The point is that there are no 100 foot waves until it hits the shallows, then all the water pushes into a small area which creates the huge waves, ships always head out into open water in such conditions so they have searoom and can float and maneuver over the much smaller waves before it hits the shallows and becomes very high and very steep
I don,t know where u got that Idea go on youtube they have all kinds of vids with commercial ships out in the middle of deep Oceans plowing through all kinds of 75-100ft waves in big storms there is even one of a US aircraft carrier with a 100ft waves sweeping across its decks was totally amazing that the planes on deck stayed put , but I,m sure they would have had some kind of damage , do u realize how much HP would b required to get over the top of a 100ft swell :o

Just sayin that,s all

J 8)
I'm not an expert, so please, no flames, but I think there are major differences between a bad storm (even a hurricane) and a tsunami. A large wave caused by a storm is phenomena that occurs mostly at the waters surface. The wind whips up waves that strengthen as they gather together to cause the damage, and this is what you see on those youtube videos.

A tsunami is caused by an earthquake. As such, it is an event that has its beginnings at the sea floor, not the waters surface. The quake causes a large displacement of water, but directly above the quake, there are no large waves. Just the steady rise of the water level. This water displacement radiates out like when a pebble hits a pond. Again it only causes a steady rise in level as it travels due to the vastness of the ocean. The problem comes when it starts to run out of space as it approaches a shore line and the depth of the water column becomes constricted. At which point, all that displacement turns into height and a large wave is seen on the horizon just before it crashes into the land.

Re: NWP Tsunami warning

Posted: Fri Feb 02, 2018 2:25 pm
by Highlander
Ok in our area an earth quake way up in Alaska USA THAT SENDS OUT A TUSAMI warning we have approx 40-60 mins to escape to high ground so unless u r already in your boat in the open ocean u ain,t gonna make it out there in time once out of Victoria Harbour I,d have to shoot out of the Strait of Juan De fu@ which is approx 10-12KM wide and 100km long to get to open ocean so u r gonna get caught in that strait with the Tusami coming off the open Ocean shootin down that strait so it,s like the open ocean coming toward a big funnel so it is gonna increase in size as it comes down the strait so I think u r basically gonna just get swept back towards the shore , now I think maybe a ship 200ft long or larger with lots of HP might b ok just my opinion But I,m sure there r more guy,s on this site from Alaska & the Yukon & NWP who have away more experience sailing in these waters than I do could chip in there thoughts just as an learning & teaching tool for some of us like me who have not done a lot of sailing here yet in the NWP & by the way the waters here r very cold u r not going to survive out here too long unless u have a survivor flotation suite on .

Anyway as I said I am open to other,s opinon who r from this area & who have lots of sailing experience in the NWP waters because they r the only one,s who can really give an true opinion on this as every area is different

so not out to start an argument here I,m just thinking it could b used as a good learning tool for me & other,s alike who r open to learning something new nothing lost but a lot could be gained , I,m looking for experienced opions here . Not an opinionated opion like mine :)

J 8)

Re: NWP Tsunami warning

Posted: Fri Feb 02, 2018 3:59 pm
by Russ
paul I wrote:I'm not an expert, so please, no flames, but I think there are major differences between a bad storm (even a hurricane) and a tsunami. A large wave caused by a storm is phenomena that occurs mostly at the waters surface. The wind whips up waves that strengthen as they gather together to cause the damage, and this is what you see on those youtube videos.

A tsunami is caused by an earthquake. As such, it is an event that has its beginnings at the sea floor, not the waters surface. The quake causes a large displacement of water, but directly above the quake, there are no large waves. Just the steady rise of the water level. This water displacement radiates out like when a pebble hits a pond. Again it only causes a steady rise in level as it travels due to the vastness of the ocean. The problem comes when it starts to run out of space as it approaches a shore line and the depth of the water column becomes constricted. At which point, all that displacement turns into height and a large wave is seen on the horizon just before it crashes into the land.
This is also my understanding of a Tsunami.

What Highlander described "winds etc" do not fit my understanding.
However, maybe it's a secondary reaction to a Tsunami, I don't know.

The safest place in my understanding was at sea. Away from shore where the bad stuff happens.

--Russ