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Ventusky – Weather data visualization

ventusky.com

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Re: Ventusky – Weather data visualization

#81

Post by fapjacks »

n0mad01 wrote: post #48
tomslavkovsky wrote: post #39

Earlier quoted context omitted.

Windytv ( http://windytv.com ) provides ECMWF 9km global model, NAM 4km for CONUS, NEMS 4km for Europe and also GFS. Info about data sources used at Windytv https://community.windytv.com/topic/12/what-source-of-weathe... Windytv created new version where you can see fine details for many different overlays.

just returned from the canaries where windytv proficiently helped me to pick my bikeroutes, adapted to the prevailing wind conditions. these winds change fast and seem unpredictable and although the connection between general weather and wind is somehow limited it seems clear to me that it must be hard to make any accurate predictions.

I used to be married to a military forecaster. It was always interesting to hear about how this stuff works, and it seems to me that "models not fitting reality" comprised at least 50% of their office drama. Forecasters have their own preference for models and "past experience" which leads them to very different conclusions. And climate change is making these models much less effective over time, adding even more excitement.

Re: Ventusky – Weather data visualization

#84

Post by galfarragem »

lllr_finger wrote: post #37

This is a great visualization of free data, although not the first in this style, but it's usefulness in actual forecasting or nowcasting is rather limited. Interpolation between sparse grid points can result in missing fine details, like the subtle boundaries that kick off the most violent storms in the central Plains. Limiting to just GFS and GEM make sense from a proof of concept level, however these are long rang…

I never found anything better than https://www.windguru.cz/

In my region (Portugal) their predictions regarding rain on 2-3 days are correct enough to make people come and ask me.. and the temperatures are optimized towards 'mildy'. E.g: You see 30C, count with 32-33C; 5C expect 3C. Note that only their GFS 27km model is updated and trustable on free mode.

Re: Ventusky – Weather data visualization

#85

Post by opticalflow »

Well, I for one find this pretty cool, especially the part where you can select the altitude. As a licensed remote pilot, this gives me a good idea of winds aloft at-a-glance without having to parse an entire full-briefing with all METARs, PIREPs, AIRMETs, and whatnot. My main question is the "altitude" in this AGL (above ground level) or MSL (mean sea level)?

Re: Ventusky – Weather data visualization

#86

Post by morganvachon »

lllr_finger wrote: post #37

This is a great visualization of free data, although not the first in this style, but it's usefulness in actual forecasting or nowcasting is rather limited. Interpolation between sparse grid points can result in missing fine details, like the subtle boundaries that kick off the most violent storms in the central Plains. Limiting to just GFS and GEM make sense from a proof of concept level, however these are long rang…

> This is a great visualization of free data, although not the first in this style, but it's usefulness in actual forecasting or nowcasting is rather limited.

Indeed, it reminds me of this, which has been around for years:

https://earth.nullschool.net/#current/wind/surface/level/ort...

Re: Ventusky – Weather data visualization

#87

Post by piokuc »

xenithorb wrote: post #62
tomslavkovsky wrote: post #34

Earlier quoted context omitted.

They are not, the only common thing is that they are Czech companies. Windytv provides ECMWF model (for free), which beats Ventusky in big way.

Can you explain the significance of that

ECMWF has been producing the best global forecasts in the world for many years. This will end in few years, but at the moment IFS, the model used at ECMWF, is the best in the world.
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