Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 24-06-2009, 16:50   #1
cruiser

Join Date: Sep 2007
Location: Tampa to New York
Boat: Morgan 33 OutIsland, Magic and 33' offshore scott design "Cutting Edge"
Posts: 1,594
Unusual High Tides - Folly Island

Were visiting Folly island and have been experiencing high tides that the locals say have never happened in their lifetimes. Daily we've been getting flood alerts on weather broadcasts. City marina and low areas underwater. Large reed islands floating up and down rivers filling up slips in marinas and covering beaches. ?worldwide phenomena? Anyone out there have stories about this occurence? Were in s carolina usa.
Steve
__________________

__________________
forsailbyowner is offline   Reply With Quote
Old 25-06-2009, 05:10   #2
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,583
Images: 240
Spring tides are especially strong tides (they do not have anything to do with the season Spring), that occur when the Earth, the Sun, and the Moon are in a line. The gravitational forces of the Moon and the Sun both contribute to the tides. Spring tides occur during the full moon and the new moon.

The Proxigean Spring Tide is a rare, unusually high tide, which occurs when the moon is both unusually close to the Earth (at its closest perigee, called the proxigee) and in the New Moon phase (when the Moon is between the Sun and the Earth). The proxigean spring tide occurs at most once every 1.5 years.

We had a new moon on June 22/09.

Because of the complex dynamics of the Earth's oceans, their inertia, friction with the ocean floor, internal viscosity and the distribution of the continents, the maximum tides do not always coincide with the optimal times of proxigee.
__________________

__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 25-06-2009, 05:27   #3
sitting on the dock of the bay

Join Date: Mar 2006
Posts: 1,513
Images: 6
Send a message via Yahoo to gonesail
how are the low tides running? we had massive low tides here in florida this spring. i was aground in the slip.
__________________
gonesail is offline   Reply With Quote
Old 25-06-2009, 13:46   #4
Registered User
 
anjou's Avatar

Join Date: Apr 2009
Location: Malvernshire, on the sunny side of the hill.
Boat: 50' steel canal and river cruiser
Posts: 1,905
This month, the moon is exceptionally close to the earth, and therefore exerting a greater pull on the tides
__________________
www.amy-artimis.blogspot.com
anjou is offline   Reply With Quote
Old 25-06-2009, 13:48   #5
Registered User
 
anjou's Avatar

Join Date: Apr 2009
Location: Malvernshire, on the sunny side of the hill.
Boat: 50' steel canal and river cruiser
Posts: 1,905

Quote:
Originally Posted by GordMay View Post
Spring tides are especially strong tides (they do not have anything to do with the season Spring), that occur when the Earth, the Sun, and the Moon are in a line. The gravitational forces of the Moon and the Sun both contribute to the tides. Spring tides occur during the full moon and the new moon.

The Proxigean Spring Tide is a rare, unusually high tide, which occurs when the moon is both unusually close to the Earth (at its closest perigee, called the proxigee) and in the New Moon phase (when the Moon is between the Sun and the Earth). The proxigean spring tide occurs at most once every 1.5 years.

We had a new moon on June 22/09.

Because of the complex dynamics of the Earth's oceans, their inertia, friction with the ocean floor, internal viscosity and the distribution of the continents, the maximum tides do not always coincide with the optimal times of proxigee.
Gord
is there nothing you dont know?

what are the winning lottery numbers this weekend?
__________________
www.amy-artimis.blogspot.com
anjou is offline   Reply With Quote
Old 25-06-2009, 14:32   #6
Registered User
 
s/v Moondancer's Avatar

Join Date: Nov 2008
Location: Fiji but heading for Alaska
Boat: Tayana 55
Posts: 1,225
Tide tonight in Avonmouth UK is 43 ft, when it goes out in the Bristol Channel the beach front is 1/2 miles from the water.
__________________
s/v Moondancer is offline   Reply With Quote
Old 26-06-2009, 13:12   #7
Registered User
 
hanschristian38's Avatar

Join Date: Jun 2008
Location: Maine
Boat: Defever 41 "Bear Holiday"
Posts: 155
Images: 3
Send a message via Skype™ to hanschristian38
You can find tide information at NOAA Tides and Currents - Home - Here you will be able to find both the predicted high tide and the actual high tide observed.

We are having unusually high tides but that's what they predicted. Nothing that was not expected.
__________________
hanschristian38 is offline   Reply With Quote
Old 26-06-2009, 14:25   #8
cruiser

Join Date: Sep 2007
Location: Tampa to New York
Boat: Morgan 33 OutIsland, Magic and 33' offshore scott design "Cutting Edge"
Posts: 1,594
On one particularly high tide a swarm of grasshoppers and small green flies descended on the area. Boats were alive with a crawling mass. There were birds nests complete with chicks and eggs floating n the debris. Too bad they couldn't read the predicted tides. A local marina owner estimated it was going to cost 10k to get all the debris and junk removed
__________________
forsailbyowner is offline   Reply With Quote
Old 26-06-2009, 22:39   #9
Registered User
 
fred's Avatar

Join Date: Jul 2006
Location: Beaufort, NC
Boat: Just sold my Cal 2-46 looking for a 47 Vagabond
Posts: 38
Huge tides here in Beaufort, NC, as well.....had to walk up to the floating docks.
Beach eroision is huge.... the end of the handicap ramp at Fort Macon Beach is 5 feet above the ground, due to the sand wash out....that sand is now in the inlet!!!!

On top on the moon position, we get wind tides.
We are in between Core and Bogue Sounds and the wind will drive the water into Taylor Creek and flood Front Street in Beaufort.
Wind has shifted, should be back to normal today.....except for the trash.......


fred
__________________
"Forgive your enemies, but never forget their names."
JFK
fred is offline   Reply With Quote
Old 27-06-2009, 03:07   #10
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,583
Images: 240
The Proxigean Tide occurs when the Moon is at its closest point in its orbit to the Earth and in its New or Full Moon phase. At these times, its tidal effect on the Earth is maximum. Tidal gravitational forces vary as the third power of the distance between Earth and Moon, so even a small difference in distance can translate into a big effect. The orbit of the moon varies from a distance of 356,500 to 406,700 kilometers with an average distance near 380,000 kilometers. The variation between the maximum and minimum distances results in tidal force changes of a factor of 1.2 times the average tidal forces.

The tidal influence is greatest during a New Moon, because both the Sun and the Moon are on the same side of the Earth.

Here is a partial list of some of the most extreme Proxigean Tides, based on the time between perigee (closest to Earth) and syzygy (either sun-Earth-moon, which is a full moon, or a new moon alignment of sun-moon-Earth) being less than 5 hours.
Date - Moon Phase
1/30/2010 - Full
3/19/2011 - Full
5/6/2012 - Full
6/23/2013 - - Full
8/10/2014 - Full
9/28/2015 - Full
11/14/2016 - Full
5/25/2017 - New
1/2/2018 - Full
7/13/2018 - New
8/30/2019 - New
10/16/2020 - New
12/4/2021 - New

1/21/2023 - New

Lunar Perigee and Apogee Calculator:
http://www.fourmilab.ch/earthview/pacalc.html
__________________

__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Mast Height, Bridge Clearance, Tides. DWT Multihull Sailboats 36 23-06-2015 19:37
2009 tides and currents - Maptech OSN? jackdale Navigation 16 25-01-2009 21:53
High Jinks on the High Seas seamjay Off Topic Forum 5 05-12-2008 05:35
LasDrop vs Tides Shaft Seal? dkall Construction, Maintenance & Refit 2 19-02-2008 15:50
Tides Marine SureSeal ?? markpj23 Propellers & Drive Systems 1 26-05-2007 14:13



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 07:16.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.