Problem: Wind spot forecast differs from animation

Reply to Problem: Wind spot forecast differs from animation on Thu, 05 Jul 2018 06:59:30 GMT

ivo — Thu, 05 Jul 2018 06:59:30 GMT

WIll look at this

Reply to Problem: Wind spot forecast differs from animation on Wed, 04 Jul 2018 20:42:53 GMT

tve — Wed, 04 Jul 2018 20:42:53 GMT

@idefix37 I understand that when I use different models the outcome isn't necessarily the same, but in my example I specifically used ECMWF for both.

Reply to Problem: Wind spot forecast differs from animation on Sun, 01 Jul 2018 12:50:21 GMT

idefix37 — Sun, 01 Jul 2018 12:50:21 GMT

@tve
In addition, the information about Tropical Storm « Fabio » in West of Mexico are from NHC

Reply to Problem: Wind spot forecast differs from animation on Sun, 01 Jul 2018 12:37:47 GMT

idefix37 — Sun, 01 Jul 2018 12:37:47 GMT

@tve
Concerning the difference between the forecasted wind and the wind that you observe, as you are on the sea shore, you may have local winds, thermal winds ... that global models cannot predict in light winds conditions. It’s better in this case to use a higher resolution model like NAM.
I have tried again in you area to make the same comparison that you have done, but for me the results are consistent. Check that you did not had a pop up like this ( but it’s with NEMS model)

You may do the following checking near the Tropical Storm «Fabio» which will strengthen to Hurricane degree by Thursday and will be located N 18º W 125º approx. (It’s better to do this exercise at this date to have different directions of wind forecasted by the models)

In the weather diagram for a place near this storm choose « Basic » and select ECMWF, then switch to « Waves » and select ECMWF WAM, the wind direction on the map and the wind in the light blue label must be the same.
Then do the same with GFS and WaveWatch, the directions must be consistent.

Of course if the wind model and the wave model don’t match, the result is wrong.

You should obtain the same results as me. Otherwise there is an issue with the device used ??

Reply to Problem: Wind spot forecast differs from animation on Sat, 30 Jun 2018 20:35:29 GMT

tve — Sat, 30 Jun 2018 20:35:29 GMT

I gave it another try. Step 1: display the wind, note ECMWF model:

Then I switched to waves (ECMWF WAM) and placed a detail spot marker:

Then I switched back to wind and the animation (which is the same as in step 1) does not match the wind direction of the spot marker:

Is this Windy showing inconsistent data or is this due to the data sets not being self-consistent?

Reply to Problem: Wind spot forecast differs from animation on Sat, 30 Jun 2018 20:26:30 GMT

tve — Sat, 30 Jun 2018 20:26:30 GMT

How do I select the wind model and where do I see which is selected? It seems a bug to me that what is shown is not consistent. Also, I posted two images one using ECMWF WAM and one using WWW3 and in neither do the wind directions match the animation (in addition none of the three matched reality , the wind ended up coming out of the WSW!).

Reply to Problem: Wind spot forecast differs from animation on Sat, 30 Jun 2018 17:10:55 GMT

idefix37 — Sat, 30 Jun 2018 17:10:55 GMT

@tve
When you choose the ECMWF model for the wind and ECMWF WAM for the waves the result is consistent. But with ECMWF for the wind (the animation) if you switch to WWW3 wave model, it cannot match because WWW3 use an other wind model.
When you change the wave model it does not change automatically and accordingly the wind model (the animation).