Weather data

Meteomed purchases the raw data from the world leader in medium-range weather forecasts, the European Centre for Medium-Range Weather Forecasts based in Reading, England and the Met Office, the UK National Weather Service. Weather data for the entire Mediterranean basin area arrives on the Meteomed servers three times a day from the ECMWF and the Met Office and undergoes initial processing based on the exclusive Meteomed forecast model (specially developed for the Mediterranean), producing the two major RUNs with a resolution of 2.5 nautical miles: one in the morning and one in the evening. Data regarding the first 48 hours of forecasting undergo further processing, by means of the Euro4 sea model, which allows us to define the interaction of waves with the coastal orography and the bathymetry of the seabed.

Since 2016, our new sea model, produced by the implementation of the WW3 mathematical model, operates for the first 48 hours, allowing for a vast improvement in the significant wave height and direction parameters. The main improvement is the interaction with the bathymetry, islands and coasts; the influence of morphology on the marine condition is essential for obtaining reliable information for the natural harbours and for all areas of complex orography, where wave interaction with obstacles is crucial.

The marine weather data produced is verified and validated by a qualitative analysis performed "manually" by our professional meteorologists. The calculated variables are: wind, burst, weather, temperature, pressure, significant wave height, wave direction, maximum wave height and swell.

For a complete, but concise overview of our weather data products, services, and subscriptions, please see the table on the subscription page.

UPDATE TIMETABLE FOR CHARTING DATA:

RUN 00:
  • 05:45 da 0h a +48h atmospheric variables 
  • 07:00 da +48h a +240h atmospheric variables
  • 08:00 da 0h a +240h atmospheric variables plus marine variables
RUN 06:
  • 14:00 da 0h a +48h atmospheric variables
RUN 12:
  • 17:45 da 0h a +48h atmospheric variables
  • 19:00 da +48h a +240h atmospheric variables
  • 20:00 da 0h a +240h atmospheric variables plus marine variables
Please Note:
Atmospheric variables = wind, burst, weather, temperature and pressure
Marine variables = Significant wave height, wave direction, maximum wave height and swell

UPDATE TIMETABLE FOR SUMMARY AND WEATHER ROUTEING DATA:

These are the same times as for charting data but with a delay of about 10-15 min. This means that for a very short period there may be a small discrepancy between the charting product and the summary product, exclusively linked to the updating delay.

REFERENCE TIME ZONE

On our web pages, we indicate the UTC time (Universal Time Coordinated), which corresponds to the local solar time of the prime meridian passing through the Greenwich Observatory. To calculate the local time in Italy during solar time (in force between the last Sunday of October and the last Saturday of the following March) you must add an hour to the UTC time. In contrast, during daylight savings time (between the last Sunday of March and the last Saturday in October), you must add two hours to the UTC time.

SMS AND DIGITAL RECEPTIONIST:

The atmospheric and marine data we issue via SMS and our digital receptionist is taken from a representative point of the entire sector, be it large or small. In some cases, meteorological conditions may also differ within a very narrow area. We also advise the use of the charts for a more in-depth analysis.
 
Timeline detail of forecasts on summary tables, Weather Routeing and the Mobile App
For the first seven days of the forecast (the first 168 hours), the data is at hourly intervals, from the eighth to the tenth day the data is at daily intervals referring to midday.
 

TIMETABLE DETAILS OF FORECASTS ON SUMMARY TABLES, WEATHER ROUTES AND THE MOBILE APP

TEMPORARY DETAILS OF THE CHARTED FORECAST

PREMIUM PORTS AND SECTORS

  1. Total Ports: 1848
  2. Macro-sectors: 25
  3. Sectors: 152

 

Each sea sector has different dimensions depending on local weather requirements. Sea sectors are larger offshore, where there are no particular meteorological elements, while inshore sectors are smaller and differ from each other, because the different coastal orography strongly influences weather conditions. In order to allow a general, summarised overview, the Mediterranean basin is organised in 3 macro-areas: Western Mediterranean, Central Mediterranean, Eastern Mediterranean.
 
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