- Wind Speed and Directions are always comes as wrong: please compare with real-time observations; Windy just plots on maps model forecasts provided by weather centers, it doesn't compute any forecast. Moreover, model forecasts computed on grids with 25 km / pixel resolution cannot be too precise over mountain/valley areas, where wind forecast values are particularly hard to predict.
- How we can understand 3 to 4 hrs ago that a specific cloud will come to a specific place?: just watch the forecast for next 3-4 hours (use the time bar).
- What is meant by >240 in this map: which data layer did you selected on that screenshot?
- No one replying: please, next time you post a question on such a community site, wait a bit more than 6 minutes for an answer...
Best posts made by vsinceac
RE: A Complaint & some Questions about Map.
RE: Option to set default view.
Can’t I just set a preferred view and have it saved?
Yep, I think such a new feature, i.e. kind of option "keep currently enabled data overlays on next user sessions" (and why not current map coverage, too?), would be welcome for many use cases. At least for users who often use same data layers and/or map coverage...
WMO observing network contains both ships (voluntary observing ships or part of GTS network) and buoy stations.
Some met offices even use drones, turtles, whales, etc. as support for ocean weather sensors...
Buoys are generally static, ships are generally moving; both of them should have a series of standard weather sensors defined by WMO and provide messages of type SHIP or BUOY (which are extensions to the more generic SYNOP mesages). Ogimet web site (for example) provides part of them here (screenshot below).
WMO/GTS naming rules of all ocean observing stations are defined here.
RE: Can isobars switch be a setting?
Even more useful would be to get isolines rendering option to all pertinent data layers (not only pressure), and also to be also able to configure isolines interval value (like for color shading palettes), for each parameter.
RE: Visibility layer is not accurate
This discussion (as well as many other community discussions, e.g. this one), makes me thinking that adding a collection of 3rd party, pertinent URLs to Windy UI would be really helpful to many users (and to Windy, too).
Of course such a 3rd party web sites are not intended to replace, nor to compete with Windy.com.
A good sample is the link provided in comment just above, which is for a web site specialized in dust forecast, provided by a research laboratory.
Windy.com has not the required resources to (and should not) compete with big research laboratories (e.g. official WMO product providers), but could advantageously provide such a pertinent list to its users; I guess everybody would win...
Such a pertinent URLs list may be pretty long, thus items may be grouped by category (e.g. "Weather Alerts", "LRF Models", "NWP Models Data Providers", "Local Forecasts Europe/NA/Asia/country/Etc)", "Satellite Imagery", etc.).
Its appearance may be also as discrete as needed (e.g. placed in the main Menu, just after Windy Plugins), in order to not change current look and feel of Windy UI.
Of course each URL link could and should have a full description (e.g. as OnMouseOver tooltip).
Btw., such a link to OSM Community web site could save a lot of time to both users and administrators and avoid all these long and boring posts about missing roads or wrong country names on Windy maps...
Moreover, as Windy has many occasional or permanent users and part of them are meteorologists, forecasters, pilots, I guess many of them would be happy to propose and share pertinent URLs which would be really helpful to users with less knowledge in these domains.
Btw., the community discussions already contain a pretty big collection of links to pertinent 3rd party web sites...
RE: 15 min refresh
Only automatic weather stations refresh at such a frequency.
You can also use observations for closest METAR weather stations (every 30m).
For clouds you can use images from METEOSAT satellite, refreshed every 15m. Radar data is also available in your area, but it doesn't provide clouds or wind observations.
Forecast models available on Windy only have validities for every hour (in best cases).
RE: NOAA upgrades GFS global weather model
All GFS 0.25° grib files provided by NCEP/NOAA after this upgrade do contain announced changes. I don't know if Windy downloads grids of all available parameters/levels: data is huge (>0.5 GB for each forecast), while downloaded grids may be filtered by both coverage, forecast, parameter and level.
Obviously not all available parameters and levels are available via Windy UI.
Anyway, introducing all parameters and levels on UI would be useless for most of the Windy users (e.g. some parameters are available for levels 0.1 hPa, 0.2 hPa, etc.); they would be only useful for research purpose.
Bigger white shark ever is swimming with Windy, too
The biggest white shark ever is swimming toward Europe, news say.
This web site displays its position in real time (as well as that of other swimming beasts).
And on that site, Weather Data Layers are provided by Windy:
RE: What source of weather data Windy use?
As said in my previous post above, if forecasts and satellite image layers are displayed together on map, there would be a bug: they cannot be contemporary (excepted at full hours, maybe).
Satellite images are provided every 10 or 15 minutes; Windy should obtain that worldwide mosaic by merging images from differrent satellites, taken at small time difference (a couple of minutes or so, but surely not hours).
When combining satellite and atmospheric pressure layers together on map, then playing the animation over the whole available period on timebar (i.e. last 2, 6 or 12 hours), one can see that the pressure layer remains static over the whole period, while satellite images layer change at each time step...
Thus the pressure isobars layer doesn't follow current value on timebar as expected, which is wrong from my pov.
Having a static pressure isobars layer combined with animated satellite images would be useful for some specific deep analysis, but in such a case the validity time of the static layer should be clearly displayed on UI (I was not able to find it).
RE: What source of weather data Windy use?
I think the best would be to clearly display on UI the validity time of the static data displayed on isolines layer (pressure, temperature, etc.).
This way I think nobody would say that it is a bug: users should easily understand this.
It is the same as when displaying a time series of observed data today AND of the data observed one year ago, on the same 2D plot; this is often used in analysis and it is really useful when the validity time of each time series is clearly labelled.
RE: Creat Allergen Map.
And do you trust them? Dr. Trump already tried to predict that Coronav will die with Spring temperatures :o)))
Even weather is pretty difficult to forecast, thus such a "medical problem" prediction should be even fuzzier (while it uses algorithms based on weather forecast)...
RE: Between India and Bangladesh, There a little Glith.
This is not a bug and couldn't be fixed; it is the result of merging products from different satellites in order to get a worldwide mosaic.
The "long line" is just the border between different coverage areas of sensors installed on different geostationary satellites.
See more details in this related topic.
RE: max, min and avg temperature of each country
Daily average values computed over such a big areas cannot be pertinent from meteorological pov.
These values are provided by WMO stations (e.g. in SYNOP messages) for the position of that station; they can be then used when computing climatological products (daily, monthly, etc.), conjointly with values provided by neighbor stations at some distance (but not very far away).
Max/min/avg temperature has not any meaning for countries e.g. like USA, which goes from Alaska to Florida...