- 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...
Meeeeeeeee! Meeeeeeeee! Meeeeeeeee!
Best posts made by vsinceac
RE: A Complaint & some Questions about Map.
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.
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...
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: temperature in Holyrood NL CA misreported
This is the risk to take when using non-WMO weather stations. Nowadays everyone can buy on ebay and other amazons a so-called "weather station" for a couple of dollars, and then push on the web measures taken by any kind of sensors. Just be aware that many of these stations are not calibrated and thus not trustworthy.
Obviously the temperature sensors (at least) of station EW3441 are fucked off, while the owner is not aware or doesn't care about it. See more details here. Windy cannot handle this, it just displays without any control the measures sent by these stations. You should maybe ask more the owner of the station (maybe firstname.lastname@example.org).
As a conclusion: one should always trust WMO stations against personal weather stations.
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:
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: Windy 3D mode is back!
Of course "3D" is a language abuse (and so is "2.5D", too); nevertheless "3D" is nowadays generally understood as such by everyone, even by main contributors of modern GIS (e.g. ESRI).
I think the aim of Windy is not cartography (ArcGIS, Gogol Maps and other similar sites do this enough well; they hold the required money to do it); the main scope of Windy maps would be rather the Weather.
Thus, the so called "3D map" is just the Earth reduced to a dynamic sphere plotted on a flat web browser window. Of course it is a very rough approximation of the Terrestrial geoid... but finally who would like to get weather maps on such an ugly geoid, while "3D" does the deal for Weather maps? Moreover, holy "3D" actually has "4D": longitude, latitude, atmospheric level, and time validity of weather data layers.
About map projections: of course modern GIS can reproject on the fly any map data layer in thousands of different map projections, one more accurate than the other for a given point on Earth. But all this is pretty costly in terms of required hardware and map generation time. Thus, projections like the so-called Gogol (EPSG:900913), pseudo-projections like EPSG:4326, or famous "3D sphere", should be far enough pertinent for Weather maps on a free - or so cheap - web application. And I think Windy does all this at a pretty high performance rate: it is the most UI responsive public weather maps application I know.
Latest posts made by vsinceac
RE: Climate crisis layer
I don't think the request for "climate change layer" would be related to current weather forecast models (i.e. data layers for fire, hurricane, air quality, extreme forecast or yet fires).
I think it is rather about anomalies of observerd or forecasted values related to climatological normals...
At this stage, climatological normals (generally computed over 30 years period), are not currently available on Windy (while they could and they should imho.).
RE: Windy Wave Data
GRIB2 files of new GFSWave forecast model are available for free here since a couple of months (take files named [...].global.[...] for worldwide coverage).
Pay attention to new download policy, too: no more than 120 hits per minute ftp get queries (including HEAD queries), otherwise your IP would be blacklisted by NCEP/NOAA servers.
RE: Windy does not show rain
Now, with screenshot above (many thanks!), I understand much better your problem.
This is weird, as for me this layer works perfectly at any moment for the same area and map scale (screenshot below - cannot go back in the past at same date/time as on your screenshot). That data layer may be empty at bigger map scale though (i.e. no rain is forecasted).
Maybe your internet access is cut off by moments? Did you tried on other device with different internet access? Do you use the most recent version of Edge? Did you tried on a different web browser, e.g. Chrome?
You could also watch if following type of query returns something - with web browser in debug mode (F12) - when you select some new date/time on the time bar for that layer: https://ims.windy.com/ecmwf-hres/2021/08/03/06/257w3/3/0/rainlogptype2-surface.png?reftime=2021072512.
Otherwise, you should wait for help from Windy support team.
RE: Wetterphänomen auf der Arabischen Halbinsel 25.07.2021
Nope, it is not a weird weather phenomenon, it is just about weird data sent by the weather radar "SADAW". The same radar images are also weird on all other sites which display it.
You should compare with satellite images over the same period: one can see that nothing significant happens over that area...
RE: MESOWEST weather data
There is a wolf (here):
RE: I cant see the colors when I zoom in the map
AROME model grid provides values every 1.3 km, thus a 50 km wide map has enough values to interpolate... then Point values on map intepolate very well at such a scale, even for model grids with less resolution. This is why I think the reasons to don't display data layers at big scales is rather related to server performances than protecting base map details (the aim of Windy maps is weather, not base maps). I hope Windy staff could tell more about this...