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    Radar Quality - Portugal

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    • Daniel Smith 860f3f08-a85e-4077-b8fd-46b34b41bbc0D Offline
      Daniel Smith 860f3f08-a85e-4077-b8fd-46b34b41bbc0 | Premium
      last edited by

      Not great for the "Weather Radar" in Porto this weekend when looking for the WRC Rally.

      It was not picking up rain cells well, with the effect of missing cells rather than phantom cells. I don't have any Quantitive data, but hopefully it can be investigated further?

      Use Windy for all F1 Events, and was surprised by how poor it was in Portugal for the radar.

      idefix37I 1 Reply Last reply Reply Quote 0
      • idefix37I Online
        idefix37 Sailor Moderator @Daniel Smith 860f3f08-a85e-4077-b8fd-46b34b41bbc0
        last edited by idefix37

        @Daniel-Smith-860f3f08-a85e-4077-b8fd-46b34b41bbc0
        The Radar data is provided by IPMA over Portugal. So if there is anything wrong you can check this link.

        CanneC 1 Reply Last reply Reply Quote 0
        • CanneC Offline
          Canne @idefix37 | Premium
          last edited by Canne

          @idefix37 @daniel-smith-860f3f08-a85e-4077-b8fd-46b34b41bbc0
          IPMA's own application and web page is better for this purpose than Windy's radar view, or the aforementioned IPAM's own radar view, here : Mapa dinâmico Continente.

          2026-05-11_1605_IPAM_dinamico.png

          This product's radar layer is available in 5 minute resolution, from https://www.ipma.pt/resources.www/transf/radar/imgs-radar.json
          and https://www.ipma.pt/resources.www/transf/radar/por/<< path-from-json >>

          I don't know if Windy is using the same source/frequency and/or their own filters, but the view is different :

          2026-05-11_1605_Windy_radard_view.png

          The aforementioned IPAM radar image product is not updated as frequently, only once every 30 minutes. Is Windy using interpolation in between less frequently fetched images in order to limit the bandwidth? (I am just guessing, of course) :

          2026-05-11_1530_IPAM_radar.jpg
          note: the above is a JPG-image generated every 30 minutes, unlike the dynamic map, which is using IPAM's own API.

          HardikPH SutyS 2 Replies Last reply Reply Quote 1
          • HardikPH Online
            HardikP External Developers @Canne
            last edited by

            @Canne great question @suty is this real

            1 Reply Last reply Reply Quote 0
            • SutyS Offline
              Suty Windy Staff @Canne
              last edited by

              @Canne Hello, we use the same source as you shared, however, we use a bit different threshold or filter, so some smaller images/data are not displayed in Windy.

              1 Reply Last reply Reply Quote 1
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