An upgrade of ECMWF’s Integrated Forecasting System (IFS) to Cycle 47r2 implemented on 11 May has introduced single precision for high-resolution and ensemble forecasts (HRES and ENS) and increased the vertical ensemble resolution.
Posts made by vsinceac
ECMWF upgraded forecast model
RE: NCEP/NOAA upgrades GFSv16 weather forecast model
From: email@example.com Sent: Wednesday, May 12, 2021 17:00 To: firstname.lastname@example.org Subject: News for May 12, 2021
Update of GFS to v16.1: Include commercial radio occultation data, as well as changes to GFS-wave output which will cause some files to be delayed up to 10 minutes on NOMADS/ftpprd. Implementation date May 18, 2021
RE: Default Forecast Model
One cannot save weather model preferences in current implementation, for this clear reason.
As already said upper in this thread (and in yet other threads), as a workaround one can add API parameters in the URL used to open Windy.
Default URL is https://windy.com, which displays default ECMWF GLOBAL model on map centered on your IP (or your last Favorite) location, at zoom scale 5 (about 1:17M, or 1cm:170 km).
Instead, you can use one of following URLs to open Windy; the last 3 values separated by comma are Lat/Lon of map center, and the map zoom scale:
- ECMWF (default): https://www.windy.com/?38.162,16.486,9
- GFS GLOBAL: https://www.windy.com/?gfs,38.162,16.486,9
- ICON EU: https://www.windy.com/?iconEu,38.162,16.486,9
- ICON GLOBAL: https://www.windy.com/?icon,47.162,2.486,9
- AROME: https://www.windy.com/?arome,47.162,2.486,9
- NEMS: https://www.windy.com/?nems,47.162,2.486,9
- NAM CONUS: https://www.windy.com/namConus,46.740,-102.217,3
Currently selected model in URLs above should cover selected position, otherwise map automatically shifts to default model, position and zoom scale.
Moreover, you can also trick with default data layer (which is wind - of course :o); e.g. this URL will display Temperature data layer for GFS model when you open Windy: https://www.windy.com/-Temperature-temp?gfs,temp,47.8,2.5,7
RE: Reading windspeed
The trace length of each wind particle is proportional to the wind speed value. Nevertheless it is not easy to visually get wind speed values from traces of moving particles (which are rather useful to appreciate wind streams), without a color. There are two possibilities to get more wind speed info:
- modify the color shading palette via Main Menu / Settings / Customize Color Scale / Wind; changes are kept on server side for next user sessions
- click map to get on a popup values for both wind direction and speed for that position, when wind layer is displayed. Clicking down arrow control on popup displays a meteogram for same position, with all forecasted wind values for next 10 days.
RE: Windy Radar Map
Some other web sites seem having (?) Irak radar data, e.g. this one (they confess - "?" control" - it may be just simulated from satellite data).
Other site shows radar data at least for extreme North-West Iran area (Khoy Doppler Radar).
Ukraina radar here and maybe (?) there; I don't know if data is public.
Anyway, Windy couldn't provide radar data over areas where data is not (publicly) available...
Aurora events may be computed by taking into account different forecast model parameters and some extra-info, but not over long periods. They may be provided as nowcast only (i.e. next very short period say, 30 minutes), on very specialized sites, e.g. NOAA site.
Windy does not provide such a forecast, as Aurora parameter cannot is not (and cannot) be included in global weather forecast grids it serves.
RE: Have you seen Windy on your local TV Channel? Let us know!
Not a TV channel, but yet another web site which just displays Windy maps (with ads of course to get some money): https://www.meteocontact.fr/previsions/france/rafales-vent
RE: Which model is most accurate for Europe?
My answer was strictly about comparing forecast models; I never compared Windy (I love it) to similar web sites.
Anyway, as a moderator, if you would consider it as a spam, please feel free to mark it as such.
Nevertheless, I just tried to help Windy users to get the best results from Windy.
RE: Forecasts at high elevation / in mountains seem inconsistent
I'm not sure global models would be the best choice to correctly forecast weather for such a very specific place. I think better would be to try more specialized forecast sites like this one, or even better to ask Canadian Weather Office for dedicated forecast.
RE: Which model is most accurate for Europe?
>>> *** The question was ‘’which model is most accurate for Europe", not "which weather web site offers the greatest number of weather models". ***
My response above just tried to help answer that very question.
I don't even know - and I don't care - if this holy web site offers the most models, but I still consider it interesting to better answer the main question in this thread.
RE: Thunderstorms without a Cape index
Did you checked all available forecast models in your area?
CAPE is just the result of a formula, while some models are not so good over areas having specific microclimate; e.g. GFS0.25° grid has a resolution of ~25 km, far not enough for best results over such an area.
Generally speaking, CAPE is not a magic number; forecasters use it in conjunction with other important parameters and analysis to provide best local forecast.