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Posted (edited)

I find Windguru to be quite accurate but only from around four days out.

Check Muizenberg

https://www.windguru.cz/131594

and Cape Point

https://www.windguru.cz/128493

 

They should start showing CTCT Sunday later today and watch how it changes over the next week. This weekend is looking good. Roads are going to be humming.

Watch out for homicidal pensioner motorists in Fish Hoek and the grumpy locals on Chappies   :eek:

Edited by Bump
Posted (edited)

Windguru, Accuweather, News24 etc. all report using the widely available, free-to-use GFS prediction model. This model is currently predicting an incoming westerly low-pressure system which will bring the North-Wester and some small prediction of drizzle over the 10th to the 11th of March. Windy.com and PredictWind use the more expensive ECMWF model which is predicting a light-moderate South Easter over the 10th to the 11th of March. 

It goes without saying that the models aren't a 100% accurate but GFS has under-performed in terms of prediction accuracy between 7-14 days in comparison to ECMWF - don't take my word for it - Google it. We are still a little too far out to tell exactly which way it will swing but I, personally, compare both models and as soon as they start to converge in terms of predictions closer to the time (4-7 days), you have a better idea of what is coming. Nerve wracking not knowing what that will be though. 

Disclaimer: Not a meteorologist, just a cyclist who loves tail winds. 

Edited by verandapanda
Posted

Windguru, Accuweather, News24 etc. all report using the widely available, free-to-use GFS prediction model. This model is currently predicting an incoming westerly low-pressure system which will bring the North-Wester and some small prediction of drizzle over the 10th to the 11th of March. Windy.com and PredictWind use the more expensive ECMWF model which is predicting a light-moderate South Easter over the 10th to the 11th of March. 

 

It goes without saying that the models aren't a 100% accurate but GFS has under-performed in terms of prediction accuracy between 7-14 days in comparison to ECMWF - don't take my word for it - Google it. We are still a little too far out to tell exactly which way it will swing but I, personally, compare both models and as soon as they start to converge in terms of predictions closer to the time (4-7 days), you have a better idea of what is coming. Nerve wracking not knowing what that will be though. 

 

Disclaimer: Not a meteorologist, just a cyclist who loves tail winds. 

 

 

In the cape you also become use to the weather predictions changing. Many a time it was a certainty for rain  (seen a 100% prediction), that never happened.  Yes might be nice to mentally prepare for what it coming (or change of clothing), but the weather on the day will be the weather on the day and nothing we can do about it, ok maybe those guys that decided between the different rim types and / or mtb vs road bike 

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