@Filip_K Just checking with afternoon convection today in southern Saskatchewan and the change in data feed is working well. Cell up to 68 dBz with no drop-outs.

https://community.windy.com/post/145434

@Filip_K Thanks so much for the quick fix to another Canadian RADAR issue.

It is unfortunate; I do wish that either raw data was freely available or they just also produced a PPI image so there wasn't seasonality to the applicable imagery.

They are producing a precipitation type product on their GeoMet API under the Radar_1km_SfcPrecipType product, but I don't think that would be particularly helpful in an automated system.

Thanks again for looking into it and the quick adjustment!

@marekd I've been using the Windy sounding more and more and it's been a great help. Two things I'd love to see that would help with precipitation forecasting:

• An option to display the calculated wet-bulb temperature; the trace will always sit between Td and Ta.
• An option to display the calculated Frost Point temperature. This is equivalent to dew point but based on relative humidity with respect to ice rather than liquid water. It is often between Td and Ta but can be higher than Ta in cases of supersaturation with respect to ice.

These would be a huge help and should be able to be derived from the existing Ta and Td measurements in the sounding.

Hey everyone, I've been working at getting an overlay to help me in my day-to-day analysis but I've been running into an issue that I just can't seem to get around.

I want to overlay Canada's forecast regions onto the map; here's my process:

• Source forecast region shapefiles (https://dd.weather.gc.ca/meteocode/geodata/version_6.10.0/MSC_Geography_Pkg_V6_10_0_Land_Unproj.zip)
• Combine public forecast zone and marine forecast zone shapefiles, convert to geoJSON
• (Optional) Convert to kml

I can get the region polygons to show without issue, but I can't figure out how to style them at all; the standard ways of styling geoJSON seem to have no impact on the display:

Ideally I'd be able to customize the line colour and thickness of the polygons and remove the fill, but nothing I've tried has resulted in any changes to the overlay.

Can anyone share some insight on how to customize geoJSON polygon display for Windy?

I’ve updated the iOS app and get a checkerboard overlay on top of the satellite layer when viewing RADAR+.

@Filip_K Thanks so much for the quick fix to another Canadian RADAR issue.

It is unfortunate; I do wish that either raw data was freely available or they just also produced a PPI image so there wasn't seasonality to the applicable imagery.

They are producing a precipitation type product on their GeoMet API under the Radar_1km_SfcPrecipType product, but I don't think that would be particularly helpful in an automated system.

Thanks again for looking into it and the quick adjustment!

@WeatherInThePeg Just following up to say that I realized the GeoMet products are on a 1km grid, not a 1km altitude.

Re: RADAR Drop-Out At High dBz

Just following up on this as I'm not sure if the RADAR processing techniques have changed since this adjustment or not.

Over the past couple months, I've noticed RADAR returns on the Canadian Prairies looking quite weak...far weaker than they should be. When comparing to other RADAR applications, such as Radarscope, the returns in Windy can often be 10-15 dBz lower than the raw data is suggesting.

Which makes me wonder...if you're ingesting the pre-made imagery, if it's CAPPI imagery then it really needs to be altered between winter and summer (1.0 vs 1.5 km CAPPI). I believe on their GeoMet API, the RADAR imagery has been standardized to 1km, but I'm not familiar with the ins and outs of that.

Anyways, all that to say that I've noticed that the RADAR returns are very cool on the Canadian Prairies since we moved into winter (to the point that sometimes I can barely see precipitation moving through the area) and my gut feeling is that it's due to a 1.5 km CAPPI which isn't particularly applicable in winter time.

I do wish Canada just put out a PPI image and called it a day.

@Filip_K Just checking with afternoon convection today in southern Saskatchewan and the change in data feed is working well. Cell up to 68 dBz with no drop-outs.

https://community.windy.com/post/145434

@Filip_K Thanks for looking into that. Seems like their colour scale doesn't go high enough, and unfortunately their "Max Value" colour is the same as the background and gets cut when removing the background for transparency. Oops! (I'd be lying if I hadn't made similarly obvious mistakes when programming things myself that seemed blindingly obvious in retrospect).

I definitely recommend getting in touch with the MSC; seems like a easy problem to fix (e.g. just use a different off the scale colour) and from the people I've talked to, external requests get a lot more attention than internal ones. :-)

I've just be re-exploring Windy after not really checking it out for a couple years, and I'm very impressed with what you've built up. It's a fantastic application and I look forward to seeing the ways it continues to grow.

Thanks for the quick response to the problem and I hope that a solution doesn't take too long to get implemented (on the MSC's side). I personally much prefer the higher quality tiles they serve via WMS on the GeoMet than their pre-made imagery.

I was monitoring a thunderstorm in Alberta, Canada today and noticed that when it reached high dBz levels -- it seems to have peaked with values in the 65 to 70 dBz range -- the high reflectivity core was dropped on Windy's RADAR display.

You can see it on the thunderstorm southwest of Edmonton in the attached photo. This was around 23:20Z on May 31, 2023.

Not sure if this is a scale issue or what, but it would be nice for Windy's display to catch the real strong ones as well!

Here's the relevant scan of the same storm in Radarscope with the strongest core highlighted.

Let me know if any other information is needed. Thanks!