Summer is here - at last!
In Ireland we always describe our weather as "contrary"! This may be so but as mariners it is vital for us to know what is coming so we can plan voyages afloat. Marine weather forecasting has become a much more accurate science in recent years and it is very easy for the mariner to get forecasts. We have a great service on TV where a meteorologist explains the forecast (a great way to learn about the weather) RTE 1 broadcasts such a forecast just after 18:50 and again at 21:20 - and don't forget the farming forecast (the weeklong one) at lunchtime on Sundays - great for planning a week afloat. BBC TV forecasts also use meteorologists to give the forecast on a regular basic and also give a weeklong forecast - well worth checking out as another independent source of information.
We have lots of other great sources of forecasts: the Radio (RTE1), Phone(1550133855), Newspaper, Navtex, VHF (announced on 16 at 01:03 and every 3 hrs thereafter), observation and of course the internet - please have a look at the very comprehensive SailCork weather page. (We get hundreds of hits every day - if you have a good weather link that we don't have listed please tell us and we will put it up)
It is vital to get a good forecast before going afloat and to keep abreast of the forecast whilst afloat - I always have a good look at most of the links on our weather site every day and whilst afloat I listen to the VHF and in bigger boats carry my computer with 3G access so I can get full details - on smaller boats I carry my iphone with a host of weather apps and instant access to our weather web page on SailCork.com.
What prompted me to write this blog is the fact that despite a "good" forecast the weather may differ in some locations. Today (Thur May 20 2010) the temperature in Killarney was 24 degrees and at the same time in Cobh it was only 14 degrees. (Later it rose to 19 degrees in Cobh) - Why the difference? Simply because Cobh was blanketed in fog blotting out the sun!
How does fog happen? Sea fog usually happens in the spring when a warm moist southerly wind blows over our south coast which is still relatively cold (and so is the sea) - the warm moist air then cools and condenses - forming fog......... and what will get rid of it? A change in conditions - a change in wind direction - meaning that the cause of the fog (the warm moist air from the south) is no longer there.
Land fog is more common in the winter when after a warm sunny day the air has absorbed moisture ( the warmer the air the more moisture it can hold) and then at night (especially when there is a high pressure system) if there is no blanket of cloud the land gets cold very quickly and cools the air above it condensing it to form fog. In the morning the sun or a breeze will clear land fog.
Another local effect we are likely to see more of from now on is the "Sea Breeze" This occurs in coastal areas usually when there is a high pressure sitting over us with a very slack gradient (when the isobars are very far apart) The morning is usually beautiful with not a breath of wind and a glassy surface on the sea. Then in late morning there is the beginnings of an onshore breeze increasing during the afternoon and veering somewhat before dying off in the evening. The simple explanation is that when the sun heats up in the morning it heats the land quicker then the sea (as the land is a better conductor of heat) and the cooler air comes in from the sea to replace the rising warm air. So don't get caught out on that beautiful summers morning - think about the sea breeze - it can come up to 15kn on Irish coasts! (The converse can happen at night when we get a lighter "land breeze")
So roll on the summer and hopefully we will see lots of highs this year!
NOTE: Meteorology is a very important subject matter on all our shorebased navigation courses at SailCork from Basic Navigation through Day Skipper to Yachtmaster. We also run special Meteorology Courses during the winter months.
Eddie English Blog
- » It’s mid winter - time for SailCork to head west…............very far west
- » Our Irish Weather….....and how to understand it!
- » What do you do during the winter? - Must be nothing happening! - WRONG!!
- » Be safe afloat! Learn at evening classes this autumn
- » Cruising the Cork and Kerry Coasts.
- » SailCork Caribbean Cruise 2013 - St. Vincent and the Grenadines
- » iPad for navigation at sea
- » Understanding our Irish Weather
- » “You must be fierce quiet at this time of the year!”
- » Using the iPad for Navigation
- » A “navigation course” is about a lot more than navigation! - it’s what you need!
- » September is coming - and so is summer!
- » SailCork Isles of Scillies Cruise - to Dingle!
- » Galicia - Spain’s Celtic Atlantic outpost.
- » Why did the Costa Concordia sink?
- » My stamp album and the Caribbean - the best sailing waters in the world!
- » “My first sail” - by Cathy Mullan
- » Navigation is fun!
- » Sunshine Sailing in Croatia in October
- » Ballinacurra - the last home of the topsail schooners in Cork.
- » Your very first sail!
- » British Virgin Islands Sunshine Cruise - SailCork rules the Caribbean
- » Caribbean Sunshine Sailing Holiday
- » From Zero to Hero in 3 years! - by Dave Hunter
- » What is Powerboating?
- » Autumn Series at the Royal Cork
- » A navigation course is about a lot more than navigation!
- » The Art and Science of Navigation
- » Irish Naval Service and the “Naval Race”
- » September - plenty of action afloat!
- » Summer drawing to a close - but busier than ever here at SailCork!
- » Cork Week - Europe’s best fun regatta
- » Coast - Cork Part 2 - West Cork
- » Cork - What a fantastic cruising ground!
- » Summer is here - at last!
- » Volcanoes, Planes and Antigua
- » Underwater cable Aghada to Cuskinny
- » Lightships off the Irish Coast
- » SailCork Caribbean Sunshine Cruise BVI’s 2010
- » Patrick’s Bridge stands up straight, The River Lee flows underneath!
- » The Celtic- world’s biggest liner and the chair in our back hall.
- » November gales, my stamp album and sailing in the sun!
- » The Kish Lighthouse
- » The Naval Storehouses and Mrs. Deane from Cork
- » The Spit Lighthouse in Cobh
- » Autumn - a time for learning!
- » Autumn slides in gently!
- » Our super September summer! (+Croatia)
- » Summer is here…..for a while!
- » Cobh to Blackrock - a great race?
- » West Cork is calling…..................!
- » Dun Laoghaire Regatta goes to Howth and Killiney….......... Calves Week on the way!!!
- » Champagne Sailing and Super Social Sovereign’s Cup
- » Who are these guys? What was the Admiral’s Cup?
- » Sovereign’s Cup Regatta Kinsale
- » Green Dragon leads the way from Galway!
- » The big B B Q for SailCork 35
- » SailCork 35 celebrations begin!
- » SailCork celebrates 35 years training afloat!
- » Blog to have new face
- » New SailCork website
- » Eddie’s SailCork blog comes alive again!
- » Scillies story postponed.
- » “Holy Grounder” Beneteau 36.7
- » The story of Holy Grounder - SailCorks flagship
- January 2014
- November 2013
- September 2013
- April 2013
- March 2013
- February 2013
- January 2013
- December 2012
- November 2012
- September 2012
- August 2012
- June 2012
- March 2012
- January 2012
- December 2011
- November 2011
- October 2011
- September 2011
- July 2011
- January 2011
- November 2010
- October 2010
- September 2010
- August 2010
- June 2010
- May 2010
- April 2010
- February 2010
- January 2010
- December 2009
- November 2009
- October 2009
- September 2009
- July 2009
- June 2009
- May 2009
- January 2009