ENS extended products comprise ensembles of individual forecasts up to 46 days and post-processed products of average conditions (e.g. weekly averages) and the associated uncertainty.
The purchase of the "Basic Set" +72, +96, +120, +144, +168 hrs is a mandatory prerequisite for the purchase of time steps in the range 12 to 66 hours.
The following sub-sets are available from the ENS extended (46 days):
The forecast products are available daily, but you can opt to receive the data for Monday and Thursday only.
Re-forecast products are only available for Monday and Thursday runs.
VI-i: Weekly means of ensemble means (including re-forecast products)
- VI-i-a Weekly means of ensemble means - Single level
- VI-i-b Weekly means of ensemble means - Pressure levels
VI-ii: Weekly mean anomalies of ensemble means
- VI-ii-a Weekly mean anomalies of ensemble means - Single level
- VI-ii-b Weekly mean anomalies of ensemble means - Pressure levels
VI-iii: Weekly means of individual ensemble members (including re-forecast products)
- VI-iii-a Weekly means of individual ensemble members - Single level
- VI-iii-b Weekly means of individual ensemble members - Pressure levels
VI-iv: Weekly mean anomalies of individual ensemble members
- VI-iv-a Weekly mean anomalies of individual ensemble members - Single level
- VI-iv-b Weekly mean anomalies of individual ensemble members - Pressure levels
VI-v: Individual forecast runs (including re-forecast products)
- VI-v-a Individual forecast runs - Single level
- VI-v-b Individual forecast runs - Pressure levels
- VI-v-c Individual forecast runs - Wave
VI-vi: Probabilities (weekly products)
- VI-vi-a Probabilities - Weekly averaged
- VI-vi-b Probabilities - Weekly accumulated
- VI-vi-c Probabilities - Probability distributions
- VI-vi-d Probabilities - Probability boundaries
VI-ii: Extreme Forecast Index (EFI) and Shift of Tails (SOT)
(dissemination data stream indicator = F for real-time forecasts)
(dissemination data stream indicator = H for re-forecasts)
Forecast product | Time available |
---|---|
Real Time Forecast |
20:00 |
Re-forecast | 21:00 (Mon / Thu) |
Base time 00 UTC only
Forecast ranges
Six 7-day ranges per run
Forecast time ranges | Resolution | |
Monday |
0-168/168-336/336-504/504-672/672-840/840-1008 |
|
Tuesday | 144-312/312-480/480-648/648-816/816-984 | |
Wednesday | 120-288/288-456/456-624/624-792/792-960 | |
Thursday | 96-264/264-432/432-600/600-768/768-936/936-1104 | |
Friday | 72-240/240-408/408-576/576-744/744-912/912-1080 | |
Saturday | 48-216/216-384/384-552/552-720/720-888/888-1056 | |
Sunday | 24-192/192-360/360-528/528-696/696-864/864-1032 |
VI-i-a: Weekly means of ensemble means - Single level
Short Name | ID | Long Name | Units | Additional information |
---|---|---|---|---|
strf | 1 | Stream function | m**2 s**-1 | |
vp | 2 | Velocity potential | m**2 s**-1 | |
z | 129 | Geopotential | m**2 s**-2 | |
t | 130 | Temperature | K | |
u | 131 | U component of wind | m s**-1 | |
v | 132 | V component of wind | m s**-1 | |
q | 133 | Specific humidity | kg kg**-1 | |
gh | 156 | Geopotential Height | gpm |
Short Name | ID | Long Name | Units | Additional information |
---|---|---|---|---|
strfa | 171001 | Stream function anomaly | m**2 s**-1 | |
vpota | 171002 | Velocity potential anomaly | m**2 s**-1 | |
ta | 171130 | Temperature anomaly | K | |
ua | 171131 | U component of wind anomaly | m s**-1 | |
va | 171132 | V component of wind anomaly | m s**-1 | |
gha | 171156 | Height anomaly | m |
Short Name | ID | Long Name | Description | Units | Additional information |
---|---|---|---|---|---|
rsn | 33 | Snow density | This parameter is the mass of snow per cubic metre in the snow layer.
The ECMWF Integrated Forecast System (IFS) model represents snow as a single additional layer over the uppermost soil level. The snow may cover all or part of the grid box. |
kg m**-3 | |
mx2t6 | 121 | Maximum temperature at 2 metres in the last 6 hours | The highest value of 2 metre temperature in the previous 6 hour period.
2m temperature is calculated by interpolating between the lowest model level and the Earth's surface, taking account of the atmospheric conditions. See further information. This parameter has units of kelvin (K). Temperature measured in kelvin can be converted to degrees Celsius (°C) by subtracting 273.15. |
K | |
mn2t6 | 122 | Minimum temperature at 2 metres in the last 6 hours | The lowest value of 2 metre temperature in the previous 6 hour period.
2m temperature is calculated by interpolating between the lowest model level and the Earth's surface, taking account of the atmospheric conditions. See further information. This parameter has units of kelvin (K). Temperature measured in kelvin can be converted to degrees Celsius (°C) by subtracting 273.15. |
K | |
z | 129 | Geopotential | This parameter is the gravitational potential energy of a unit mass, at a particular location, relative to mean sea level. It is also the amount of work that would have to be done, against the force of gravity, to lift a unit mass to that location from mean sea level.
The geopotential height can be calculated by dividing the geopotential by the Earth's gravitational acceleration, g (=9.80665 m s-2). The geopotential height plays an important role in synoptic meteorology (analysis of weather patterns). Charts of geopotential height plotted at constant pressure levels (e.g., 300, 500 or 850 hPa) can be used to identify weather systems such as cyclones, anticyclones, troughs and ridges. At the surface of the Earth, this parameter shows the variations in geopotential (height) of the surface, and is often referred to as the orography. |
m**2 s**-2 | |
stl1 | 139 | Soil temperature level 1 | This parameter is the temperature of the soil at level 1 (in the middle of layer 1).
The ECMWF Integrated Forecasting System (IFS) has a four-layer representation of soil, where the surface is at 0cm: Layer 1: 0 - 7cm Soil temperature is set at the middle of each layer, and heat transfer is calculated at the interfaces between them. It is assumed that there is no heat transfer out of the bottom of the lowest layer. This parameter has units of Kelvin (K). Temperature measured in Kelvin can be converted to degrees Celsius (°C) by subtracting 273.15. |
K | |
sd | 141 | Snow depth | This parameter is the depth of snow from the snow-covered area of a grid box.
Its units are metres of water equivalent, so it is the depth the water would have if the snow melted and was spread evenly over the whole grid box. The ECMWF Integrated Forecast System represents snow as a single additional layer over the uppermost soil level. The snow may cover all or part of the grid box. |
m of water equivalent | |
msl | 151 | Mean sea level pressure | This parameter is the pressure (force per unit area) of the atmosphere adjusted to the height of mean sea level.
It is a measure of the weight that all the air in a column vertically above the area of Earth's surface would have at that point, if the point were located at the mean sea level. It is calculated over all surfaces - land, sea and in-land water. Maps of mean sea level pressure are used to identify the locations of low and high pressure systems, often referred to as cyclones and anticyclones. Contours of mean sea level pressure also indicate the strength of the wind. Tightly packed contours show stronger winds. The units of this parameter are pascals (Pa). Mean sea level pressure is often measured in hPa and sometimes is presented in the old units of millibars, mb (1 hPa = 1 mb = 100 Pa). |
Pa | |
tcc | 164 | Total cloud cover | This parameter is the proportion of a grid box covered by cloud. Total cloud cover is a single level field calculated from the cloud occurring at different model levels through the atmosphere. Assumptions are made about the degree of overlap/randomness between clouds at different heights.
Cloud fractions vary from 0 to 1. |
(0 - 1) | |
10u | 165 | 10 metre U wind component | This parameter is the eastward component of the 10m wind. It is the horizontal speed of air moving towards the east, at a height of ten metres above the surface of the Earth, in metres per second.
Care should be taken when comparing this parameter with observations, because wind observations vary on small space and time scales and are affected by the local terrain, vegetation and buildings that are represented only on average in the ECMWF Integrated Forecasting System. This parameter can be combined with the V component of 10m wind to give the speed and direction of the horizontal 10m wind. |
m s**-1 | |
10v | 166 | 10 metre V wind component | This parameter is the northward component of the 10m wind. It is the horizontal speed of air moving towards the north, at a height of ten metres above the surface of the Earth, in metres per second.
Care should be taken when comparing this parameter with observations, because wind observations vary on small space and time scales and are affected by the local terrain, vegetation and buildings that are represented only on average in the ECMWF Integrated Forecasting System. This parameter can be combined with the U component of 10m wind to give the speed and direction of the horizontal 10m wind. |
m s**-1 | |
2t | 167 | 2 metre temperature | This parameter is the temperature of air at 2m above the surface of land, sea or in-land waters.
2m temperature is calculated by interpolating between the lowest model level and the Earth's surface, taking account of the atmospheric conditions. See further information . This parameter has units of kelvin (K). Temperature measured in kelvin can be converted to degrees Celsius (°C) by subtracting 273.15. |
K | |
2d | 168 | 2 metre dewpoint temperature | This parameter is the temperature to which the air, at 2 metres above the surface of the Earth, would have to be cooled for saturation to occur.
It is a measure of the humidity of the air. Combined with temperature and pressure, it can be used to calculate the relative humidity. 2m dew point temperature is calculated by interpolating between the lowest model level and the Earth's surface, taking account of the atmospheric conditions. See further information.This parameter has units of kelvin (K). Temperature measured in kelvin can be converted to degrees Celsius (°C) by subtracting 273.15. |
K | |
lsm | 172 | Land-sea mask | This parameter is the proportion of land, as opposed to ocean or inland waters (lakes, reservoirs, rivers and coastal waters), in a grid box. This parameter has values ranging between zero and one and is dimensionless. In cycles of the ECMWF Integrated Forecasting System (IFS) from CY41R1 (introduced in May 2015) onwards, grid boxes where this parameter has a value above 0.5 can be comprised of a mixture of land and inland water but not ocean. Grid boxes with a value of 0.5 and below can only be comprised of a water surface. In the latter case, the lake cover is used to determine how much of the water surface is ocean or inland water. In cycles of the IFS before CY41R1, grid boxes where this parameter has a value above 0.5 can only be comprised of land and those grid boxes with a value of 0.5 and below can only be comprised of ocean. In these older model cycles, there is no differentiation between ocean and inland water. |
(0 - 1) | |
mtsfr | 172144 | Mean total snowfall rate | This parameter is the mean rate of snowfall. It is accumulated snowfall divided by the length of the accumulation period, which depends on the data extracted.
This parameter is the sum of large-scale snowfall and convective snowfall. Large-scale snowfall is generated by the cloud scheme in the ECMWF Integrated Forecast System (IFS). The cloud scheme represents the formation and dissipation of clouds and large-scale snowfall due to changes in atmospheric quantities (such as pressure, temperature and moisture) predicted directly by the IFS at spatial scales of a grid box or larger. Convective snowfall is generated by the convection scheme in the IFS. The convection scheme represents convection at spatial scales smaller than the grid box. See further information. The units are depth of water equivalent in metres which falls per second (i.e., the depth the melted snow would have if it were spread evenly over the grid box ). Care should be taken when comparing model parameters with observations, because observations are often local to a particular point in space and time, rather than representing averages over a model grid box and model time step. |
m of water equivalent s**-1 | |
msdr | 172189 | Mean sunshine duration rate | This parameter is the accumulated sunshine duration divided by the length of the accumulation period, which depends on the data extracted, giving the mean sunshine duration rate.
The sunshine duration is the length of time in which the direct solar (shortwave) radiation at the Earth's surface, falling on a plane perpendicular to the direction of the Sun, is greater than or equal to 120 W m-2. The minimum solar intensity level of 120 W m-2 is defined by the World Meteorological Organisation and is consistent with observed values of sunshine duration from a Campbell-Stokes recorder (sometimes called a Stokes sphere) that can only measure moderately intense sunlight and brighter. |
s s**-1 | |
tp | 228 | Total precipitation | This parameter is the accumulated liquid and frozen water, comprising rain and snow, that falls to the Earth's surface. It is the sum of large-scale precipitation and convective precipitation. Large-scale precipitation is generated by the cloud scheme in the ECMWF Integrated Forecasting System (IFS). The cloud scheme represents the formation and dissipation of clouds and large-scale precipitation due to changes in atmospheric quantities (such as pressure, temperature and moisture) predicted directly by the IFS at spatial scales of the grid box or larger. Convective precipitation is generated by the convection scheme in the IFS, which represents convection at spatial scales smaller than the grid box. See further information. This parameter does not include fog, dew or the precipitation that evaporates in the atmosphere before it lands at the surface of the Earth.
This parameter is the total amount of water accumulated over a particular time period which depends on the data extracted. The units of this parameter are depth in metres of water equivalent. It is the depth the water would have if it were spread evenly over the grid box. Care should be taken when comparing model parameters with observations, because observations are often local to a particular point in space and time, rather than representing averages over a model grid box. |
m | |
100u | 228246 | 100 metre U wind component | This parameter is the eastward component of the 100 m wind. It is the horizontal speed of air moving towards the east, at a height of 100 metres above the surface of the Earth, in metres per second.
Care should be taken when comparing model parameters with observations, because observations are often local to a particular point in space and time, rather than representing averages over a model grid box and model time step. This parameter can be combined with the northward component to give the speed and direction of the horizontal 100 m wind. |
m s**-1 | |
100v | 228247 | 100 metre V wind component | This parameter is the northward component of the 100 m wind. It is the horizontal speed of air moving towards the north, at a height of 100 metres above the surface of the Earth, in metres per second.
Care should be taken when comparing model parameters with observations, because observations are often local to a particular point in space and time, rather than representing averages over a model grid box and model time step. This parameter can be combined with the eastward component to give the speed and direction of the horizontal 100 m wind. |
m s**-1 |
Short Name | ID | Long Name | Units | Additional information |
---|---|---|---|---|
strf | 1 | Stream function | m**2 s**-1 | |
vp | 2 | Velocity potential | m**2 s**-1 | |
z | 129 | Geopotential | m**2 s**-2 | |
t | 130 | Temperature | K | |
u | 131 | U component of wind | m s**-1 | |
v | 132 | V component of wind | m s**-1 | |
gh | 156 | Geopotential Height | gpm |
VI-v-a: Individual forecast runs - Single level
Forecast ranges & resolution
Six 7-day ranges per run
Forecast time ranges | Resolution | |
---|---|---|
Monday |
0-168/168-336/336-504/504-672/672-840/840-1008 |
|
Tuesday | 144-312/312-480/480-648/648-816/816-984 | |
Wednesday | 120-288/288-456/456-624/624-792/792-960 | |
Thursday |
96-264/264-432/432-600/600-768/768-936/936-1104 |
|
Friday | 72-240/240-408/408-576/576-744/744-912/912-1080 | |
Saturday | 48-216/216-384/384-552/552-720/720-888/888-1056 | |
Sunday | 24-192/192-360/360-528/528-696/696-864/864-1032 |
Available at 1000, 925, 850, 700, 500, 400, 300, 200 hPa unless otherwise specified.
Six 7-day ranges per run
Forecast time ranges | Resolution | |
---|---|---|
Monday |
0-168/168-336/336-504/504-672/672-840/840-1008 |
|
Tuesday | 144-312/312-480/480-648/648-816/816-984 | |
Wednesday | 120-288/288-456/456-624/624-792/792-960 | |
Thursday |
96-264/264-432/432-600/600-768/768-936/936-1104 |
|
Friday | 72-240/240-408/408-576/576-744/744-912/912-1080 | |
Saturday | 48-216/216-384/384-552/552-720/720-888/888-1056 | |
Sunday | 24-192/192-360/360-528/528-696/696-864/864-1032 |
Short Name | ID | Long Name | Units | Additional information |
---|---|---|---|---|
strfa | 171001 | Stream function anomaly | m**2 s**-1 | |
vpota | 171002 | Velocity potential anomaly | m**2 s**-1 | |
za | 171129 | Geopotential anomaly | m**2 s**-2 | |
ta | 171130 | Temperature anomaly | K | |
ua | 171131 | U component of wind anomaly | m s**-1 | |
va | 171132 | V component of wind anomaly | m s**-1 | |
qa | 171133 | Specific humidity anomaly | kg kg**-1 | |
gha | 171156 | Height anomaly | m |
Forecast ranges & resolution
- | Forecast time step | Base times | Resolution |
---|---|---|---|
T+0h to T+1104h | 6-hourly | 00 UTC |
|
VI-v-a: Individual forecast runs - Single level
Short Name | ID | Long Name | Units | Additional information |
---|---|---|---|---|
strf | 1 | Stream function | m**2 s**-1 | |
vp | 2 | Velocity potential | m**2 s**-1 | |
z | 129 | Geopotential | m**2 s**-2 | |
t | 130 | Temperature | K | |
u | 131 | U component of wind | m s**-1 | |
v | 132 | V component of wind | m s**-1 | |
q | 133 | Specific humidity | kg kg**-1 | |
w | 135 | Vertical velocity | Pa s**-1 | |
vo | 138 | Vorticity (relative) | s**-1 | |
d | 155 | Divergence | s**-1 | |
gh | 156 | Geopotential Height | gpm |
- | Forecast time step | Base times | Resolution |
---|---|---|---|
T+0h to T+360h | 6-hourly | 00 UTC |
|
T+366h to T+1104h | 6-hourly | 00 UTC |
|
Product resolution
- 0.4° x 0.4° lat/long grid or any multiple thereof (global or sub-area)
- On model (Octahedral) O320 grid (global or sub-area)
Forecast ranges
Six 7-day ranges per run
Forecast time ranges | Base times | |
---|---|---|
Monday |
0-168/168-336/336-504/504-672/672-840/840-1008 |
00 UTC |
Tuesday | 144-312/312-480/480-648/648-816/816-984 | |
Wednesday | 144-312/312-480/480-648/648-816/816-984 | |
Thursday |
96-264/264-432/432-600/600-768/768-936/936-1104 |
00 UTC |
Friday | 72-240/240-408/408-576/576-744/744-912/912-1080 | |
Saturday | 48-216/216-384/384-552/552-720/720-888/888-1056 | |
Sunday | 24-192/192-360/360-528/528-696/696-864/864-1032 |
VI-vi-a: Probabilities - weekly averaged
Short Name | ID | Long Name | Units | Additional information |
---|---|---|---|---|
2tag2 | 131001 | 2m temperature anomaly of at least +2K | % | |
2tag1 | 131002 | 2m temperature anomaly of at least +1K | % | |
2tag0 | 131003 | 2m temperature anomaly of at least 0K | % | |
2talm1 | 131004 | 2m temperature anomaly of at most -1K | % | |
2talm2 | 131005 | 2m temperature anomaly of at most -2K | % | |
tpag20 | 131006 | Total precipitation anomaly of at least 20 mm | % | |
tpag10 | 131007 | Total precipitation anomaly of at least 10 mm | % | |
tpag0 | 131008 | Total precipitation anomaly of at least 0 mm | % | |
stag0 | 131009 | Surface temperature anomaly of at least 0K | % | |
mslag0 | 131010 | Mean sea level pressure anomaly of at least 0 Pa | % |
Short Name | ID | Long Name | Units | Additional information |
---|---|---|---|---|
tpag20 | 131006 | Total precipitation anomaly of at least 20 mm | % | |
tpag10 | 131007 | Total precipitation anomaly of at least 10 mm | % | |
tpag0 | 131008 | Total precipitation anomaly of at least 0 mm | % |
Short Name | ID | Long Name | Units | Additional information |
---|---|---|---|---|
2tp | 131167 | 2 metre temperature probability | % | |
tpp | 131228 | Total precipitation probability | % |
Short Name | ID | Long Name | Units | Additional information |
---|---|---|---|---|
2ta | 171167 | 2 metre temperature anomaly | K | |
tpara | 173228 | Total precipitation anomalous rate of accumulation | m s**-1 |
Short Name | ID | Long Name | Units | Additional information |
---|---|---|---|---|
2ti | 132167 | 2 metre temperature index | (-1 to 1) | |
tpi | 132228 | Total precipitation index | (-1 to 1) |
Short Name | ID | Long Name | Units | Additional information |
---|---|---|---|---|
2ti | 132167 | 2 metre temperature index | (-1 to 1) | |
tpi | 132228 | Total precipitation index | (-1 to 1) |
Last updated 09-09-2020