Wave reading way off



  • I love the Windy app. I have it on my phone and use the site on my computer. I use it to study the weather and scout sea conditions for spearfishing. Today however I noticed that the wave reading for where I live was way off.

    I live on the Corinthian Gulf in Greece, and if you check the data which much surely be available by now, you can compare it to the readings you gave in your app.

    It has been showing something like 0.1 meters for where I live and yet I've been looking out the window and for the past 6 hours or so it's been very wavy. Waves crashing over the pier etc.

    I felt this was worth mentioning because this renders the wave function useless. If it can be off by this much, even in the present time, then how can it be reliable?


  • Sailor Moderator

    @homer-bean said in Wave reading way off:

    you can compare it to the readings you gave in your app.

    In Mediterranean Sea, Windy only visualizes a wave model called WAM which is developed and run by ECMWF, the European Centre for Medium-range Weather Forecasts. It’s not Windy who make the wave prediction.
    It is a shame that this model can give bad predictions in the Corinthian Gulf. But it is probably difficult to have an accurate forecast of the local wind in this gulf in a mountainous area and therefore of the waves which are dependent on this wind. If you check the wind conditions today as forecast by ECMWF weather model, you can see they were supposed to be weak. But at same time the ICON and NEMS models were predicting tougher wind conditions, explaining probably higher waves than those forecast by ECMWF.


  • Moderator

    @homer-bean
    Επίσης μελετήστε το παρακάτω:
    https://community.windy.com/topic/12872/wrong-wind-data/4?_=1603199898694
    Το πολύπλοκο ανάγλυφο των περιοχών γύρω από τον Κορινθιακό Κόλπο,
    δημιουργεί πολλούς τοπικούς ανέμους με αποτέλεσμα να υπάρχει "ανακρίβεια" στην πρόγνωση του κυματισμού (ως αποτέλεσμα του ανέμου).
    Ιδιαίτερα οι συνθήκες των ισχυρών βορείων ανέμων των τελευταίων ημερών, δημιουργούν τέτοια προβλήματα.
    π.χ. ένας ισχυρός βόρειος άνεμος δεν δημιουργεί
    κυματισμό στις βόρειες ακτές (π.χ. Ιτέα) ενώ δημιουργεί πρόβλημα
    στη νότια ακτή (π.χ. Κιάτο).
    Δυστυχώς είμαστε μακριά ακόμα από τη δημιουργία παγκόσμιων μοντέλων με υψηλή διακριτική ικανότητα (π.χ. 1 km)
    ώστε να μπορούμε να έχουμε αξιόπιστη πρόγνωση σε τοπικό επίπεδο.
    Έως τότε, ο συνδυασμός προγνωστικών χαρτών και "τοπικής" εμπειρίας είναι η καλύτερη λύση.


Log in to reply
 

Windyty, S.E. - all rights reserved. Powered by excellent NodeBB
NodeBB & contributors, OSM & contributors, HERE maps
Terms and Conditions     Privacy Policy