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    How can I access historical data?

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    • mimakaevM
      mimakaev | Premium
      last edited by

      Re: storage. Access even to a very sub-sampled historical data would be useful as well!

      If you have data at 1 degree resolution, that is roughly 360*180 points per globe. If you were to only keep 5 (7, 10) basic measurements (pressure, temperaturue, wind speed/direction, precipitation) at three different altitudes (0, 850hPa, 500hPa), it gives you: 360 * 180 * 5 * 3 * 4 (bytes per float32), which is about 4MB per measurement. Sample it every 3 hours over a year, and that would be 8GB/year. Go to 0.5 degree resolution, and that's 32GB/year. That still can fit on my laptop. And I think grib files actually use less than 4 bytes per point.

      I was also frustrated with the lack of any ways to access historical data. So I'm actually planning to download a bunch of grib files from public GFS server, select only relevant timepoints/layers, and save them for viewing in existing grib viewers (or publish them somewhere). It is still a lot of work, probably a week of coding for me, and however many days/weeks to download the data. I may actually do this project at some point.

      1 Reply Last reply Reply Quote 1
      • B
        bartbv
        last edited by

        Is it possible to view data less than 24 hours ago?
        I assumed this was possible, but there is a reset at 00:00.

        B 1 Reply Last reply Reply Quote 1
        • B
          bartbv @bartbv
          last edited by

          @bartbv I found out, this is possible by changing your computers local time.

          1 Reply Last reply Reply Quote 0
          • A
            ababah @ivo
            last edited by

            @ivo Historical data is very important to some researchers and users

            1 Reply Last reply Reply Quote 2
            • don longD
              don long
              last edited by

              down with surfline hail the new king. WINDYTV.com

              1 Reply Last reply Reply Quote 0
              • drjduncanD
                drjduncan
                last edited by

                At some point we should talk. I might be able to help. Dr. Duncan. Send me your email if you'd like to...

                Jim

                1 Reply Last reply Reply Quote 0
                • RK7R
                  RK7 @ivo
                  last edited by

                  @ivo

                  thanks understand ,
                  I am working on finding a sustainable shipping solution by harnessing wind energy on ships and for which i need to understand the wind patterns /speed along the Indian Peninsular . If there is an paid subscription for historical view or any other arrangements possible , please do let me know .
                  Brgds
                  RK7

                  Gkikas LGPZG 1 Reply Last reply Reply Quote 0
                  • Gkikas LGPZG
                    Gkikas LGPZ Moderator @RK7
                    last edited by

                    @rk7
                    https://weather.us/model-charts/euro/india/wind-mean-direction/20180820-0900z.html

                    RK7R 1 Reply Last reply Reply Quote 0
                    • RK7R
                      RK7 @Gkikas LGPZ
                      last edited by

                      @gkikas-lgpz
                      thank you ,
                      I would like to have historical wind patterns say Jan ,Feb so on to December so as to understand how it blows from where and how strong .

                      Brgds
                      RK7

                      Gkikas LGPZG 1 Reply Last reply Reply Quote 0
                      • Gkikas LGPZG
                        Gkikas LGPZ Moderator @RK7
                        last edited by Gkikas LGPZ

                        @rk7
                        See "Indian Ocean Pilot Charts" (Pub. #109)
                        http://www.offshoreblue.com/navigation/pilot-charts.php

                        RK7R 1 Reply Last reply Reply Quote 1
                        • RK7R
                          RK7 @Gkikas LGPZ
                          last edited by

                          @gkikas-lgpz

                          thank you

                          1 Reply Last reply Reply Quote 1
                          • R
                            RootInc.
                            last edited by

                            Hi, Ivo.

                            As a farmer, I definitely need the historical data.

                            Keisuke (CEO, Root Inc., Japan)

                            1 Reply Last reply Reply Quote 1
                            • A
                              ANTIGUA
                              last edited by

                              Please. It would be great for ocean rowing.

                              1 Reply Last reply Reply Quote 0
                              • steffan.watkinsS
                                steffan.watkins
                                last edited by

                                I understand the issue with funding, and space, but was none the less wondering if South Atlantic wave and wind data from August 30th was still cached or otherwise still in the database, or if it has already been purged. Thank you for making an amazing weather service! :)

                                idefix37I 1 Reply Last reply Reply Quote 1
                                • idefix37I
                                  idefix37 Sailor Moderator @steffan.watkins
                                  last edited by

                                  @steffan-watkins
                                  You can find historical data on south Atlantic here:
                                  https://weather.us/model-charts/euro/europe-africa/wind-mean-direction/20180907-1500z.html

                                  1 Reply Last reply Reply Quote 1
                                  • Ganbat GabiG
                                    Ganbat Gabi
                                    last edited by

                                    It is much important that historical data.
                                    Windy should show 5 days past weather process in the web, that is really useful thing.

                                    Ganbat

                                    1 Reply Last reply Reply Quote 0
                                    • siimS
                                      siim
                                      last edited by

                                      Use weather stations for past 20 days data.

                                      Example:
                                      https://www.windy.com/station/ad-LIEE?43.261,-2.461,5

                                      1 Reply Last reply Reply Quote 2
                                      • rsdevarapalliR
                                        rsdevarapalli
                                        last edited by rsdevarapalli

                                        Windy is fabulous!

                                        Past data would be really nice to have feature, if it is not going to cost you., As understood from above discussion.

                                        https://earth.nullschool.net help to view past data though am not sure if the website pays for it or some sponsors, it seems to fetch data on demand instead of storing.

                                        e.g.
                                        Hudhud cyclone

                                        If such an approach viable, your website could become a one place reference.

                                        Thanks for providing a great experience with windy.

                                        1 Reply Last reply Reply Quote 0
                                        • I
                                          igor 320
                                          last edited by

                                          @rsdevarapalli said in How can I access historical data?:

                                          Past data would be really nice to have feature

                                          +1

                                          1 Reply Last reply Reply Quote 2
                                          • danijel.kurincicD
                                            danijel.kurincic | Premium
                                            last edited by

                                            Pretty please, please, I love Windy, and historical data would make it even more amazing. I would pay 2€ monthly to have it.

                                            1 Reply Last reply Reply Quote 4
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