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    How to read Meteogram

    Frequently Asked Questions
    meteogram
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    • G
      GreatKingnan @Korina
      last edited by

      @korina Thanks! So the value in Meteogram is the precipitation accumulated over a quite different time period compared to the Rain & Thunder layer? What's the time period you'd applied to do the calculation?

      And I'd like to know whether the value of 'rain' in Meteogram & Airgram represents the large-scale precipitation or not? According to the description of parameter on ECMWF's website, total precipitation is the sum of large-scale & convective precipitation. It seems that the total amount of precipitation has been split into two parts in the bar graph in Meteogram: the large-scale term and convective term. Furthermore, the sum of 'Rain' and 'Covective' is exact the value in basic list, which might indicates the total precipitation. As a result, the term 'Rain' might be interpreted as the large-scale precipitation part in Meteogram.

      KorinaK 1 Reply Last reply Reply Quote 0
      • KorinaK
        Korina @GreatKingnan
        last edited by

        @greatkingnan Hello, the Rain, Thunder layers shows data for last 3 hours. The detailed forecast shows data calculated for 3hr or 1hr depending if you are Premium user or not. Therefore those values cannot be the same.

        Korina

        G 1 Reply Last reply Reply Quote 0
        • G
          GreatKingnan @Korina
          last edited by

          @korina Thanks for your help! Yes, I know exactly the data in Premium version and free version are different. But...Actually, I'm trying to figure out the differences between the rainfall values shown on the 'Rain & Thunder' layers and basic weather forecast on the same place. I just found they aren't exact the same value, especially for heavier rainfall cases, so I have no idea which one is correct. I guess it might be caused by the different definition of accumulated time period or the interpolation between each grid point.

          KorinaK 1 Reply Last reply Reply Quote 0
          • KorinaK
            Korina @GreatKingnan
            last edited by

            @greatkingnan Hello, detailed forecast or Rain, Thunder layer shows different data based on different calculations. Detailed forecast is more precise if you want to check the predicted amount of precipitation.

            Korina

            1 Reply Last reply Reply Quote 0
            • C
              chobi-chan
              last edited by

              Thanks, Korena for your very easy to understand description♪
              Meteogram on Windy.com is my favourite weather forecast❤

              1 Reply Last reply Reply Quote 0
              • J
                jev12b
                last edited by

                What is the arrow on my location pointing towards? As I turn to face a different direction, the arrow swings to point toward something else. It's not making any sense to me; what is its purpose?

                idefix37I 1 Reply Last reply Reply Quote 0
                • idefix37I
                  idefix37 Sailor Moderator @jev12b
                  last edited by idefix37

                  @jev12b

                  This arrow appears at your GPS position on the Radar layer and shows a fixed or inconsistent direction. It has no use.

                  63E2F732-9E42-459B-9A5B-DCC3223F4926.jpeg

                  1 Reply Last reply Reply Quote 0
                  • F
                    fran_j
                    last edited by

                    Hi,
                    I wanted to know what criteria you use for the elaboration of the meteograms. this is the one from the ECMWF.

                    https://confluence.ecmwf.int/display/FUG/Selection+of+grid+points+for+Meteograms

                    KorinaK 1 Reply Last reply Reply Quote 0
                    • KorinaK
                      Korina @fran_j
                      last edited by

                      @fran_j Please have a look at https://community.windy.com/topic/10309/cloudbase-meteograms?_=1630065415375

                      Korina

                      1 Reply Last reply Reply Quote 0
                      • N
                        natural lamp
                        last edited by

                        Very good summary, very helpful to the net friend ~

                        1 Reply Last reply Reply Quote 1
                        • Mark MansfieldM
                          Mark Mansfield | Premium
                          last edited by

                          On the Meteogram, what does the letter 'K: at the cloud base mean ? I have it set to show it on feet, but soem shows for example 17K

                          J 1 Reply Last reply Reply Quote 0
                          • J
                            jp_windy65535 @Mark Mansfield
                            last edited by

                            @mark-mansfield I think it means thousands (of feet) altitude.I think

                            Mark MansfieldM 1 Reply Last reply Reply Quote 1
                            • Mark MansfieldM
                              Mark Mansfield @jp_windy65535 | Premium
                              last edited by

                              @jp_windy65535 thank you, that does make sense, but then why does some heights show as feet , for example 6900, and others as 15K for example?

                              1 Reply Last reply Reply Quote 0
                              • ilua1981I
                                ilua1981
                                last edited by

                                Hi, Precipitation is indicated in mm (millimeters) as I understand the intensity of precipitation? Or accumulation? if intensity, then probably the dimension is mm/minute? And if so, then it can be daily, semi-daily. can you clarify? Привет, осадки, указаны в мм ( миллиметры) это как понимаю интенсивность осадков? Или накопление? если интенсивность, то наверное размерность мм/минуту ? И если так, то она может быть суточная, полу суточная. можно уточнить?

                                Илья

                                idefix37I 1 Reply Last reply Reply Quote 0
                                • idefix37I
                                  idefix37 Sailor Moderator @ilua1981
                                  last edited by

                                  @ilua1981
                                  It is not the intensity of precipitation per minute. It is the rain forecast during 3 hours.

                                  95120130-0703-4246-9E0C-80BAC87EB0E9.jpeg

                                  1 Reply Last reply Reply Quote 1
                                  • T
                                    Timoti | Premium
                                    last edited by

                                    Hi! What does the number in the convective mean? Is it a probability of lightnings somehow? If there is 1.4 for example does it mean 1.4 mm of convective rain? Is there a way to predict the change of lightning somehow? Is 1.0 very little or a lot? Many thanks already! Windy is the best weather app :)

                                    KorinaK 1 Reply Last reply Reply Quote 0
                                    • KorinaK
                                      Korina @Timoti
                                      last edited by

                                      @timoti Hello, the number indicates what amount of rain is from convective origin.

                                      Korina

                                      1 Reply Last reply Reply Quote 0
                                      • SochagotaS
                                        Sochagota | Premium
                                        last edited by Sochagota

                                        Hi @Korina is it possible to display the "rain" and "convective rain" as a daily sum? For example, in the Figure shown below, the accumulated rain for martes 14 (tuesday) would be 15,4 mm of rain and convective rain. In case your answer is no, do you have a Python library which could advice me by solving my rerquirement.

                                        260ce4bf-4ae0-4042-995f-b0b34300d40a-image.png

                                        Thanks!

                                        SochagotaS 1 Reply Last reply Reply Quote 0
                                        • SochagotaS
                                          Sochagota @Sochagota | Premium
                                          last edited by

                                          @sochagota said in How to read Meteogram:

                                          Hi @Korina is it possible to display the "rain" and "convective rain" as a daily sum? For example, in the Figure shown below, the accumulated rain for martes 14 (tuesday) would be 15,4 mm of rain and convective rain. In case your answer is no, do you have a Python library which could advice me by solving my rerquirement.

                                          260ce4bf-4ae0-4042-995f-b0b34300d40a-image.png

                                          Thanks!

                                          KorinaK 1 Reply Last reply Reply Quote 1
                                          • KorinaK
                                            Korina @Sochagota
                                            last edited by

                                            @sochagota Hello, there is no way to display those values as daily sum. The alternative is to use Rain accumulation layer.

                                            Korina

                                            1 Reply Last reply Reply Quote 1
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