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Unit
Unit value
Time steps
Hourly
3 Hourly
6 Hourly
Daily
Time interpretation
Time interpretation value
Bits per value

The bitsPerValue determines the relative size of the data download required for each parameter. The bitsPerValue ranges from 12 to 20 bits for our current parameters.

Note the data download size is not a direct multiplier of the bitsPerValue as there are standard overheads within the generated GRIB files which are common for all parameters. However, the bitsPerValue is a good guide to the relative cost of each parameter.
BitsPerValue value
Level Type
Level type value
Parameter ID
Parameter ID value
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Application name

Your application name is used as a link to our gateway through which your API requests are processed. On subscription we automatically create an application for you with a default name. The application name has no bearing on how things are processed.

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By ordering products from the Met Office Weather DataHub and clicking “confirm”, you are agreeing to be bound by the Met Office Weather DataHub Terms and Conditions which apply to the order.

Should you wish to discuss licensing terms, then please call 0033 678 3454 or email licensing@metoffice.gov.uk

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About monthly data usage

Data plans

All data plans are managed in GBs worth of data but note we use 1,024 conversion for all our plans. So 1,024 GB is equivalent to 1 TB (Terabyte). Strictly speaking this is TiB and GiB i.e. Tebibyte and Gigibyte

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About monthly data usage

Estimate monthly usage

Estimated order size if all selected data for all runs is taken based on an expected file size per parameter. Note this is a guide only and actual sizes for each parameter will vary.

Whilst every effort has been made to make the estimated file download sizes accurate customers should check the projected figures which are based on actual downloads as well as the estimated file sizes.

Usage this month

This figure is the actual data transferred for this calendar month so far.

Projected Monthly Usage

The projected monthly usage is calculated by:

  • retrieving the amount of data downloaded in the last 30 days
  • divide by the number of active days (>0 bytes downloaded) to get a daily average
  • multiply by the number of days in the current month for maximum monthly usage
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Order Naming

Note when used in the API the order name/ id is transformed by substituting spaces with hyphens and all letters are lowercase e.g. 'GLOBAL10k 12amRun' becomes 'global10k-12amrun'

For the avoidance of doubt the transformed order id to use in the API reproduced below in the Delivery section

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Please update your details there and then return to this tab to proceed with your subscription.

If you have been logged out, you can find the Billing page by clicking on your email address in the top-right corner and then going to 'My Organisation', after logging back in.

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Taxpayer Identification Number (TIN)

The taxpayer identification number (TIN) is the unique identifier assigned to the Account Holder by the tax administration in the Account Holder’s jurisdiction of tax residence. It is a unique combination of letters and/or numbers used to identify an individual or entity for the purposes of administering the tax laws of that jurisdiction.

For more information, please see https://www.gov.uk/hmrc-internal-manuals/international-exchange-of-information/ieim402040

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Level types

Level types are a construct of our atmospheric data models and reflect the layers within a model. Every parameter is generated within a level type which are either single or multi-layered.

Single level types relate to a particular level in the model and are one of the following:

  • atmosphere
  • cloud base (cloudbaseforcloudcover)
  • convective cloud base (convectivecloudbottom)
  • convective cloud top (convectivecloudtop)
  • effective inflow layer base (effinflowlayerbase)
  • effective inflow layer top (effinflowlayertop)
  • ground (or water surface)
  • maximum wind (maxwind)
  • mean sea level (meansea)
  • mixed layer CAPE equilibrium (mixedlayercapeequil)
  • mixing - planetary boundary layer
  • most unstable CAPE equilibrium (mostunstcapeequil)
  • most unstable departure level (mudl)
  • top of atmosphere (atmospheretop) - nominal top of the atmosphere
  • tropopause - the interface between the troposphere and the stratosphere
  • Wet bulb freezing level (wbzeroisotherm)
  • Freezing level (zeroisotherm) - level of the 0 degree C isotherm

Multi level types have many layers in the model and are currently either:

  • Height level or agl (above ground level) which has 34 model levels ranging from 5m to 6000m
  • Pressure level or isbl (isobaric level) which has 33 model levels from 1000hPa to 20hPa
  • Depth level or dbly (depth boundary layer) which has 4 model levels from 0.05m to 2m beneath the surface

In a small number of special cases parameters relate only to a single level of the model but that level is part of the multi-level layers. In these cases whilst the parameter only exists and is selected as single level the parameter is delivered in the api at the specified model level. This is currently true for the following levels:

  • 1.5m - often called screen level and equivalent to 1.5m above ground level
    • (agl) - the height of many measuring stations
  • 10m - often used to measure/ forecast wind parameters and equivalent to 10m agl
  • 700hPa - specifically used to provide a measure of vertical wind velocity and wet bulb potential temperature from the model at the 700hPa pressure level
  • 500, 850 & 925hPa wet bulb potential temperature is also available at these pressure levels - note different levels apply in global and uk model