Taitonga - Weatherlinks

Weather and currents

Wetterinfos und Strömungen

- Global
- Pacific
- Caribbean
- UNDER WAY - How to: emails, Gribfiles, SSB-Weathercharts, Tides, Pilotcharts
- Local


"Es kommt nicht darauf an, woher der Wind weht, sondern wie man die Segel setzt."
Sokrates


GLOBAL:
  • El Nino / El Nina - Forecast - Discussion
  • (Dez 2018 95% chance of El Nino, Jan 2019 65% chance of El Nino => they have a hard job! And this concludes in: What you see now might be not what you get later ...)

    PACIFIC
    Via query@saildocs.com (e.g. on the Iridium) we access: Gripfiles (we use zygrip.org as well)
    Isobar-Charts and Text from NOAA- and Fidji-Meteo-Data
    Currents OSCAR from NOAA-Data
    Weathergram from Bob McDavitt in Newzealand, weekly
    SAILDOCS-Codes for email-requests [01/2019] (their help- and infosites sucks, but the hosting-service is good, IF you know the codes!)
    email to query@saildocs.com
    Subject: blank or your choice (e.g. what, where ...)
    Body: See below
    • send => once
    • sub days=10 time=17:00 => subcribe the amount of days (days=0=infinite) automatically send at this time
    • unsubscribe => delete the subscribtion

    Saildoc-codes for cut and paste => underneath the explanations:
    • send fr.poly.en
    • send http://www.meteo.pf/previsions.php?carte=mar
    • send fr.poly.short.en
    • send http://www.meteo.pf/previsions.php?carte=ce
    • send fr.poly.long.en
    • send http://www.meteo.pf/previsions.php?carte=me
    • send gfs:7S,11S,141W,137W|1,1|0,6..168|=
      WIND,GUST,WAVES,PRESS,=
      APCP,TCDC,HTSGW,WVPER,WVDIR,CAPE
    • send spot:9.8S,139.0W|5,3|PRMSL,WIND,WAVES,RAIN,LFTX time=17:00
    • send pf.preiso36
    • send pf.preiso60
    • send PYFE11.TIF
    • send PYFI11.TIF
    • send PYFK11.TIF
    • send fleet.nadi
    • send FZPS40.PHFO
    • send nadi.sopac
    • send abpw10.pgtw
    • send RTOFS:6S,11S,141W,137W
    • send RTOFSx:6S,11S,141W,137W
    • send tsunami
    • send nz.wgrm
    • send https://meteo.pf/fr/point-hebdomadaire-saison-chaude
    • send http://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso_advisory/ensodisc.html
    Explanations:
    • fr.poly.en => 24h FP in Eng
    • http://www.meteo.pf/previsions.php?carte=mar => 24h FP in French (sometimes helpful, if the translation is weird)
    • fr.poly.short.en => Short Range FP in Eng
    • http://www.meteo.pf/previsions.php?carte=ce => FP in French
    • fr.poly.long.en => Long Range FP in Eng
    • http://www.meteo.pf/previsions.php?carte=me => Long Range FP in French
    • gfs:7S,11S,141W,137W => Full Marquesas Grib
      |1,1 => Aera-Resolution (could be 0.5,0.5 or 2,2)
      |0,6..168 => Timeperiod (could be 3,6,9,12, ...): Now, and then every 6 hours until 168h
      |= => "return", because the whole code does not fit into a single line and would fail
      WIND,GUST,WAVES,PRESS,= => Wind in kn, Gusts in kn (imho mostly underestimated), Waves in m, Pressure in mb (Isobares)
      APCP,TCDC,CAPE,=> Rain, Clouds, CAPE (indicator for e.g. lightning-possibility)
      HTSGW,WVPER,WVDIR => sign. Wavehight, Waveperiod in sec, Wavedirection,
      AIRTMP,SEATMP,WIND500,HGT500 => Airtemperature (2m), Seatemperature (surface),Windconditions in 500m above sealevel
    • spot:9.8S,139.0W|5,3|PRMSL,WIND,WAVES,RAIN,LFTX time=17:00 => Spot Grib Forecast, spotcoordinates with Decimal-Minutes (/6*10)!, 5 days at 3 hour intervals
    • pf.preiso36 => meteo.pf French Weather fax surface analysis 36 hour for the big picture incl. fronts, ridges, convergence zones etc.)
    • pf.preiso60 => meteo.pf French Weather fax surface analysis 60 hour
    • PYFE11.TIF => Weather-/Isobares-map N and S-Pacific 24h (shows e.g. weather determined ridges better than pf.preiso..)
    • PYFI11.TIF => Weather-/Isobares-map N and S-Pacific 48h
    • PYFK11.TIF => Weather-/Isobares-map N and S-Pacific 72h
    • fleet.nadi => Weather-/Isobares-map in Fleet code from Meteo Fiji includes FP, you need a fleetcode reader (e.g. add-on in OpenCPN)
    • FZPS40.PHFO => NOAA weather for the S-Pacific 0-25S, 120W-160E
    • nadi.sopac => Fidji weather for the S-Pacific
    • abpw10.pgtw => NOAA, SIGNIFICANT TROPICAL WEATHER ADVISORY (W-COAST OF S-AMERICA TO 135E)
    • RTOFS => Ocean current forecast, based on HYCOM, resolution is 0.08 (1/12) deg, and is currently available out 72 hours at 24-hour increments (RTOFS daily files) and available by 12:00z. (in OpenCPN it looks like 0.5deg resolution) (send oscar:6S,11S,141W,137W did not work! svsarana did send an old file)
    • RTOFSx => experimental current forecast available, which goes out to 192 hours: 0-72 at 3-hr increments, and 78-192 hours at 6-hour increments. Available at around 19:00z. (I only get 3 days 24h-increments, 2deg resolution)
    • nz.wgrm => Metbobs weathergram only once a week, mostly sunday
    • Climate and Cyclone-discussion => every Tuesday 3-week-outlook during cyclon-season: https://meteo.pf/fr/point-hebdomadaire-saison-chaude
    • ENSO El Nino or La Nina or Neutral? Monthly! from NOAA: http://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso_advisory/ensodisc.html
    • tsunami => Where, when and actions to be taken (thank you Sarana)


    Going West ...:

    TSUNAMI-WARNINGS (it might be an idea to register the email-adress you use for Satphone or SSB also)

    WEATHER
    • windy.com (big files!) - Big Picture with easy site-navigation (GFS or ECMWF-models) with currents to doublecheck e.g. passageweather
    • Fastseas.com - free Weatherrouting - you can insert your boats polardiagram for routing (big files!), good for planning (based on windytv.com (analog to nullschool)
    • Passageweather (big files!), good for planning overview and swellforecast, e.g. the nasty S-swells coming into the Panama-Bay! Some expierienced cruiser say that for this region this modell is more accurate than NOAA
    • earth.nullschool.net (big files!) - Big Picture to doublecheck e.g. passageweather, the only source I know of with a database where you can go back in time to see the last seasons (change the Date in the URL); imho not easy to navigate:
      (How to use earth.nullschool.net - Youtube-Video)

    We use following 6 links via SSB (and Iridium-Satphone) to get the whole story in addition to the gribs


    On the way to the Marquesas it might be possible to catch the BBC-NEWS on SSB 9413 at different times.

    Panama:
    • Windguru: Panama-City, only sometimes accurate => just gives an idea! We had forecasts with 25kn and no wind, aswell forecasts with 3kn and wind of 25kn aswell no-rain-forecasts with 2 hours of tropicrain pouring down, swells are mostly to high announced, but be alert at 1m+ from S at La Playita
    • Windfinder: Panama-City, accuracy as above, but different
    • Panama, Balboa-Pacific-Tides (240kb), more accurate than Navionics and wxtide (both have values too low!!), here are maybe a bit high values => safer!
    • Rainradar Colon-Panama-City (big files!), just to get an impression about current rain and squalls in the area 40nm-around Panama-City


    CARIBBEAN:
    Generell:
  • Actual Weathergraphic NOAA
  • 24h Forecast Graphic NOAA (available on SSB aswell)
  • 48h Forecast Graphic NOAA (available on SSB aswell)
  • 72h Forecast Graphic NOAA (available on SSB aswell)
  • Satellite Images Storm Carib
  • Offshore Waters Forecast (Caribbean / SW-Atlantic)
  • Atlantic Tropical Weather Discussion (Text) - (Big Picture and Hazards)


  • Hurricanewatch
  • NOAA - National Hurricane Center
  • National Hurricane Center-text outlook
  • NHC Experimental Marine Graphicast
  • HurricaneTrack.com - News, Information, Live Hurricane Coverage - HurricaneTrack.com provides easy to understand hurricane news, information and live coverage of hurricane landfalls.
  • Tropical Storm Risk.com - long-range forecasts of hurricane, typhoon and cyclone worldwide


  • UNDER WAY - How to
    Emails Under Way
    We get weatherinfos via Internet or Iridium (some via SSB).
    We have 5 different email-adresses from different providers for this purpose (we do not tell these adresses to anyone!). The reasons for having that many are
    - If one adress is blocked e.g. spam or big data-files or just not working we can use another one
    - Sometimes e.g. gmail blocks the account, because they do not understand, that we are travelling and change countries aswell we use a program to hide our ip-adress out of security-reasons and change countries through that
    All these adresses are configured in Thunderbird as "only text" because some mailrobots will refuse html AND only-text-mails are smaller files!

    We use the free WEATHERGRAM (ca. weekly) from Bob McDavitt in Newzealand covering the whole S-Pacific and the Way from Panama to Galapagos
    Send an email to yotreps@pangolin.co.nz - subjectline must be free
    in the body (casesensitive): WEATHERGRAM

    NOAA-Data via query@saildocs.com to where we send an email request to and recieve the data in an email-answer on the spot or after a couple of minutes (it should be possible to get the weatherinfo directly from NOAA aswell, but to find the exact page on their website was impossible for me)
    For infos on how and what to recieve, send an email to query@saildocs.com (subjectline can be anything or free): in the body:
    send info
    send index

    Gribfiles
    We use gribfiles for planning our passages, they were the only source during our atlantic-crossing via sat-phone:
  • Gribfiledownloads via ZYGRIB
  • (We like Zygrip more than Ugrib, because we can get more specific data for our specified area, which means smaller files)
  • Gribfiledownloads via SAILDOCS (smaller than Zygrib)


  • SSB-Chart-Programs
    We get some weathercharts mentioned above through our SSB, which we connect with an audiocable with out laptop. We use following software for this:
  • MScan Meteo Pro
  • JVComm32


  • Tides
    For tideprediction we use our Raymarinecharts (not happy with the lighthouse-software) and following software:
  • WXTide
  • (Not realy accurate in Grenada, Clarkscourtbay, when I compared the waterlevel at the shoreline with the tidepredictions)
  • Tideguesstimator for the Tuamotus


  • Pilotcharts
    For generall planning we have a look in the Pilotcharts of the NGA (National Geospatial-Intelligence Agency), which shows averages in prevailing winds and currents, etc:
  • NGA Pilotcharts


  • LOCAL WEATHER
    We use Windguru and Windfinder for Forecasts especially when we are close to shore, because l think they uses local „corrections“, which are not included in the gibfiles (anyway: Do not trust forecasts! Use your senses)
  • Windguru - Ecuador: Manta
  • Windfinder: Panama: Colon



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