Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Help Keep Boards Alive. Support us by going ad free today. See here: https://subscriptions.boards.ie/

Wind forecasts

  • 05-12-2013 11:50AM
    #1
    Registered Users, Registered Users 2 Posts: 1,278 ✭✭✭


    Like most, I'll often plan my spins based on wind, (If it's too windy I won't go on a long spin).

    For today, wind guru was already showing gusts at 100kmph, but on yr.no they list 14 and 12 m/s winds?
    Does anyone know what m/s stands for?
    and is there an option on yr.no to change the wind to kmph, I couldn't see it.

    Thanks

    yr.no

    wind guru


Comments

  • Registered Users, Registered Users 2 Posts: 16 Stroon


    Metres per second?


  • Registered Users, Registered Users 2 Posts: 329 ✭✭Fathead


    It's Meters per second the 12-14 m/s is approx 50kmph


    http://www.calculateme.com/Speed/MetersperSecond/ToKilometersperHour.htm


  • Closed Accounts Posts: 6,679 ✭✭✭bcmf


    m/s =metres per second.
    Today is one of those days where I would strongly advise joining the wimp list/I dont wanna end up under a bus/car/tractor/tree.


  • Registered Users, Registered Users 2 Posts: 12,234 ✭✭✭✭Cee-Jay-Cee


    Meters per second which would mean roughly 40/45kmph


  • Registered Users, Registered Users 2 Posts: 358 ✭✭Rambling Man


    Dublin Airport showing a "gentle breeze" on the Beaufort.

    http://www.dublinairportweather.com/


  • Advertisement
  • Registered Users, Registered Users 2 Posts: 370 ✭✭Jabel


    That YR.NO site has very good information.
    Met Eireann is woefully bad


  • Registered Users, Registered Users 2 Posts: 1,278 ✭✭✭MB Lacey


    metres per second!

    Thanks, do any of you know is there a way of changing that unit from m/s to kmph on the site?

    Thanks


  • Registered Users, Registered Users 2 Posts: 1,274 ✭✭✭Pigeon Reaper


    You can change the units on the sidebar of the sites. For met forecasts use the sea area ones to get accurate wind indications. These are very precise but you will need to learn the terminology used in them to get a true understanding of what to expect. Also remember that the gusts are what you feel and these will not be reported as the wind speed which is actually an average taken over a period of time.

    The Dublin airport website and a lot of web based weather reports are not using correct placements for the instruments. The DA readings are not those used by ATC which instead use the met office weather station based at DA. For all we know the website instruments could be in the multistory car park wind shadow so they will not give reliable readings.


  • Registered Users, Registered Users 2 Posts: 1,278 ✭✭✭MB Lacey


    You can change the units on the sidebar of the sites.
    For all we know the website instruments could be in the multistory car park wind shadow so they will not give reliable readings.

    Thanks, the option is there in the sidebar for windguru, but not yr.no (that I can see).

    I think someone said wind guru uses a stick in the middle of a field somewhere and could be commended for its accuracy.


  • Registered Users, Registered Users 2 Posts: 4,520 ✭✭✭Alek


    I find the Windfinder very good for planning my rides:

    http://www.windfinder.com/weatherforecast/dublin

    You can change units by clicking on them, for more weather stations go to the main map: http://www.windfinder.com/ and zoom in.


  • Advertisement
  • Registered Users, Registered Users 2 Posts: 380 ✭✭slideshow bob


    MB Lacey wrote: »
    Thanks, the option is there in the sidebar for windguru, but not yr.no (that I can see).

    I think someone said wind guru uses a stick in the middle of a field somewhere and could be commended for its accuracy.

    I've not seen a way of changing units on yr.no. AFAIK most European forecasts would use metres per second for numeric wind speeds (except the British). When we moved from miles per hour on the roads to km/hr Met E decided to start using km/hr in their forecasts. It is unusual in the European context.

    Windguru displays the gust information but yr doesn't. As Pigeon Reaper says, gusts are what you feel and are the most relevant from a safety perspective.

    The numerical models are fine for an overview, and the general direction but to be honest you really need to read Met E as they've a really good handle on what the numbers mean 'on the ground'. Today for example:
    Windy and very blustery this morning, with strong and very gusty westerly winds.
    The "very blustery" and "very gusty" is key today.

    Bear in mind the force generated by wind are proportional to the square of the windspeed. So in practice a gust of 80km/hr is 4 times worse for a cyclist than a gust of 40km/hr.


  • Registered Users, Registered Users 2 Posts: 767 ✭✭✭duffyshuffle


    Alek wrote: »
    I find the Windfinder very good for planning my rides:

    http://www.windfinder.com/weatherforecast/dublin

    You can change units by clicking on them, for more weather stations go to the main map: http://www.windfinder.com/ and zoom in.

    This is easily the best wind/weather forecast i've used


  • Registered Users, Registered Users 2 Posts: 137 ✭✭learn


    Dublin Airport showing a "gentle breeze" on the Beaufort.

    http://www.dublinairportweather.com/

    http://www.met.ie/latest/reports.asp


  • Registered Users, Registered Users 2 Posts: 197 ✭✭RonanCFD


    I use the Meteo Consult app on my phone (Android, but I expect there's an iOS version as well) - I stick Howth Marina in as a favourite and it seems to be pretty good windspeed-wise. It will either show Beaufort Scale or Knots for wind speed, and includes gust prediction.

    Here was the prediction the day before the Boards ride:

    Screenshot_2013-10-25-18-16-09_zps4b4136ff.png

    which was pretty spot-on I think - I'm a Naval Architect and have sailed for years so I have a fairly good feel for windstrength, and it felt like force 9 gusts across the Featherbeds.

    Didn't say anything about being pelted with hail, though, so a bit of a fail there! :D


  • Registered Users, Registered Users 2 Posts: 1,636 ✭✭✭the.red.baron


    What is a meter and what is a second?


  • Moderators, Society & Culture Moderators, Paid Member Posts: 16,018 Mod ✭✭✭✭smacl


    MB Lacey wrote: »
    Like most, I'll often plan my spins based on wind, (If it's too windy I won't go on a long spin).

    I do that too, though rather than cancel, I'll often just go for a more sheltered route. In around Knockree is a favourite, although its lumpy and potholed, but does give you an option of some or all of the wall if you're that way inclined. The old wicklow way road into Laragh is also attractive and way less windy than the Sally gap.


Advertisement