Seasonal 13-month forecast (Set VII - SEAS)

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These seasonal data comprises ensembles of individual forecasts coupled to an ocean model and post-processed products of average conditions (e.g. monthly averages) with the associated uncertainty. Products are available for forecast month 8-13, each quarter (February, May, August, November).

The following sub-sets are available:

VII-i: Monthly means of ensemble means

Field computed from data of the daily individual forecast runs (section VII-v) and averaged over all ensemble members. The fields are provided in GRIB code.

VII-ii: Monthly mean anomalies of ensemble means

VII-iii: Monthly means of individual ensemble members

VII-iv: Monthly mean anomalies of individual ensemble members

VII-v: Individual forecast runs

Definition of the monthly fields

The definition of the month is in accordance to the calendar month of the western calendar

  • Monthly means are computed using values at write-up times 00, 06, 12 and 18 UTC for
    • 2m temperature (K)
    • 10m U-velocity (m/s)
    • 10m V-velocity (m/s)
    • MSLP (Pa)
  • Monthly means are computed using values at write-up times 00 and 12 UTC for
    • Pressure-level parameters
  • Monthly means are computed using values at the write-up time 00 for
    • Sea surface temperature (K)
    • Soil temperature level 1 (K)
    • Volumetric soil water layer 1 (m**3 m**-3)
  • Monthly mean total precipitation (m/s) is the rate of precipitation during the month.
  • Maximum temperature at 2 meters (K) is the monthly mean of the maximum of MX2T (Maximum temperature at 2 meter since last post-processing).
  • Minimum temperature at 2 meters (K) is the monthly mean of the minimum of MN2T (Minimum temperature at 2 meters since last post-processing).
Dissemination schedule

(dissemination data stream indicator = L) 

Forecast time Time available
Forecast month 8-13

5th of each quarter 12:00 UTC (February, May, August, November)

 
VII-i: Monthly means of ensemble means

 VII-i-a: Single level 

Short Name ID Long Name Units
10u 165 10 metre U wind component m s **-1
10v 166 10 metre V wind component m s **-1
10si 207 10 metre wind speed m s **-1
2d 168 2 metre dewpoint temperature K
2t 40 2 metre temperature K
cp 143 Convective precipitation m
e 182 Evaporation m of water equivalent
fal 243 Forecast albedo (0 - 1)
iews 229 Instantaneous eastward turbulent surface stress N m**-2
inss 230 Instantaneous northward turbulent surface stress N m**-2
licd 228014 Lake ice total depth m
lmlt 228008 Lake mix-layer temperature K
lsp 142 Large-scale precipitation m
lcc 186 Large-scale precipitation (0 - 1)
10fg 49 Maximum 10 metre wind gust since previous post-processing m s **-1
mx2t24 51 Maximum temperature at 2 metres in the last 24 hours K
msl 151 Mean sea level pressure Pa
mn2t24 52 Minimum temperature at 2 metres in the last 24 hours K
ci 31 Sea ice area fraction (0 - 1)
rsn 33 Snow density kg m**-3
sd 141 Snow depth m of water equivalent
sf 144 Snowfall m of water equivalent
stl1 139 Soil temperature level 1 K
stl2 170 Soil temperature level 2 K
stl3 183 Soil temperature level 3 K
stl4 236 Soil temperature level 4 K
sund 189 Sunshine duration s
strd 175 Surface long-wave (thermal) radiation downwards J m**-2
str 177 Surface net long-wave (thermal) radiation J m**-2
ssr 176 Surface net short-wave (solar) radiation J m**-2
slhf 147 Time-integrated surface latent heat net flux J m**-2
ewssra 172180 Time-mean eastward turbulent surface stress N m**-2
nsssra 172181 Time-mean northward turbulent surface stress N m**-2
soira 172212 Time-mean short-wave (solar) insolation rate W m**-2
mssror 172009 Time-mean sub-surface runoff rate m s**-1
msror 172008 Time-mean surface runoff rate m s**-1
ttr 179 Top net long-wave (thermal) radiation J m**-2
tsr 178 Top net short-wave (solar) radiation J m**-2
tcc 164 Total cloud cover (0 - 1)
tciw 79 Total column cloud ice water kg m**-2
tclw 78 Total column cloud liquid water kg m**-2
tco3 206 Total column ozone kg m**-2
tcwv 137 Total column vertically-integrated water vapour kg m**-2
tp 228 Total precipitation m
swvl1 39 Volumetric soil water layer 1 m m**-3
swvl2 40 Volumetric soil water layer 2 m m**-3
swvl3 41 Volumetric soil water layer 3 m m**-3
swvl4 42 Volumetric soil water layer 3 m m**-3
VII-i-b: Pressure levels
Available levels: 1000, 925, 850, 700, 500, 400, 300, 200, 150, 100, 70, 50, 30, 20, 10, 5, 2, 1hPa
Short Name ID Long Name Units
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
vo 138 Vorticity (relative) s**-1
d 155 Divergence s**-1
gh 156 Geopotential Height gpm
o3 203 Ozone mass mixing ratio kg kg**-1
VII-ii: Monthly mean anomalies of ensemble means
VII-ii-a: Single level 
Short Name ID Long Name Units
10ua 171165 10 metre U wind component anomaly m s**-1
10va 171166 10 metre V wind component anomaly m s**-1
10fga 171049 10 metre wind gust anomaly m s**-1
10sia 171207 10 metre wind speed anomaly

m s**-1
2da 171168 2 metre dewpoint temperature anomaly K
2ta 171167 2 metre temperature anomaly K
cpa 171143 Convective precipitation anomaly  m

ewssara

 173180

East-West surface stress anomalous rate of accumulation

 N m**-2
ea 171182 Evaporation anomaly kg m**-2
fala 171243 Forecast albedo anomaly (0 -1)
iewsa 171229 Instantaneous X surface stress anomaly N m**-2
inssa 171230 Instantaneous Y surface stress anomaly N m**-2
licda 171025 Lake ice depth anomaly m
lmlta 171024 Lake mix-layer temperature anomaly K
lspa 171142 Stratiform precipitation (Large-scale precipitation) anomaly m
lcca 171186 Low cloud cover anomaly (0 - 1)
mx2t24a 171051 Maximum 2 metre temperature in the last 24 hours anomaly K
msla 171151 Mean sea level pressure anomaly Pa
mssrora 173009 Mean sub-surface runoff rate anomaly m of water equivalent s**-1
mn2t24a 171052 Minimum 2 metre temperature in the last 24 hours anomaly K
nsssara 173181 North-South surface stress anomalous rate of accumulation N m**-2
roara 173205 Runoff anomalous rate of accumulation m s**-1
ssta 171034 Sea surface temperature anomaly K
sica 171031 Sea-ice cover anomaly (0 - 1)
rsna 171033 Snow density anomaly kg m**-3
sda 171141 Snow depth anomaly m of water equivalent
sfara 173144 Snowfall (convective + stratiform) anomalous rate of accumulation m of water equivalent s**-1
stal1 171139 Soil temperature anomaly level 1 K
stal2 171170 Soil temperature anomaly level 2 K
stal3 171183 Soil temperature anomaly level 3 K
stal4 171236 Soil temperature anomaly level 3 K
soiara 173212 Solar insolation anomalous rate of accumulation W m**-2 s**-1
lspa 171142 Stratiform precipitation (Large-scale precipitation) anomaly m
sundara 173189 Sunshine duration anomalous rate of accumulation -
slhfara 173147 Surface latent heat flux anomalous rate of accumulation J m**-2
ssra 171176 Surface net solar radiation anomaly J m**-2
stra 171177 Surface net thermal radiation anomaly J m**-2
sshfara 173146 Surface sensible heat flux anomalous rate of accumulation J m**-2
ssrdara 173169 Surface solar radiation downwards anomalous rate of accumulation J m**-2
strda 171175 Surface thermal radiation downwards anomaly J m**-2
tsra 171178 Top net solar radiation anomaly J m**-2
ttra 171179 Top net thermal radiation anomaly J m**-2
tcca 171164 Total cloud cover anomaly (0 -1)
tciwa 171079 Total column ice water anomaly kg m**-2
tclwa 171078 Total column liquid water anomaly kg m**-2
tco3a 171206 Total column ozone anomaly kg m**-2
tcwva 171137 Total column water vapour anomaly kg m**-2
tpara 173228 Total precipitation anomalous rate of accumulation m s**-1
swval1 171039 Volumetric soil water anomaly layer 1 m**3 m**-3
swval2 171040 Volumetric soil water anomaly layer 2 m**3 m**-3
swval3 171041 Volumetric soil water anomaly layer 3 m**3 m**-3
swval4 171042 Volumetric soil water anomaly layer 4 m**3 m**-3
VII-ii-b: Pressure levels
Short Name ID Long Name Units
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
voa 171138 Relative vorticity anomaly s**-1
da 171155 Relative divergence anomaly s**-1
gha 171156 Height anomaly m
o3a 171203 Ozone mass mixing ratio anomaly kg kg**-1
VII-ii-c: Potential temperature levels
Short Name ID Long Name Units
pva 171060 Potential vorticity anomaly K m**2 kg**-1 s**-1
VII-iii: Monthly means of individual ensemble members

 VII-iii-a: Single level 

Short Name ID Long Name Units
10u 165 10 metre U wind component m s **-1
10v 166 10 metre V wind component m s **-1
10si 207 10 metre wind speed m s **-1
2d 168 2 metre dewpoint temperature K
2t 40 2 metre temperature K
cp 143 Convective precipitation m
e 182 Evaporation m of water equivalent
fal 243 Forecast albedo (0 - 1)
iews 229 Instantaneous eastward turbulent surface stress N m**-2
inss 230 Instantaneous northward turbulent surface stress N m**-2
licd 228014 Lake ice total depth m
lmlt 228008 Lake mix-layer temperature K
lsp 142 Large-scale precipitation m
lcc 186 Large-scale precipitation (0 - 1)
10fg 49 Maximum 10 metre wind gust since previous post-processing m s **-1
mx2t24 51 Maximum temperature at 2 metres in the last 24 hours K
msl 151 Mean sea level pressure Pa
mn2t24 52 Minimum temperature at 2 metres in the last 24 hours K
ci 31 Sea ice area fraction (0 - 1)
rsn 33 Snow density kg m**-3
sd 141 Snow depth m of water equivalent
sf 144 Snowfall m of water equivalent
stl1 139 Soil temperature level 1 K
stl2 170 Soil temperature level 2 K
stl3 183 Soil temperature level 3 K
stl4 236 Soil temperature level 4 K
sund 189 Sunshine duration s
strd 175 Surface long-wave (thermal) radiation downwards J m**-2
str 177 Surface net long-wave (thermal) radiation J m**-2
ssr 176 Surface net short-wave (solar) radiation J m**-2
slhf 147 Time-integrated surface latent heat net flux J m**-2
ewssra 172180 Time-mean eastward turbulent surface stress N m**-2
nsssra 172181 Time-mean northward turbulent surface stress N m**-2
soira 172212 Time-mean short-wave (solar) insolation rate W m**-2
mssror 172009 Time-mean sub-surface runoff rate m s**-1
msror 172008 Time-mean surface runoff rate m s**-1
ttr 179 Top net long-wave (thermal) radiation J m**-2
tsr 178 Top net short-wave (solar) radiation J m**-2
tcc 164 Total cloud cover (0 - 1)
tciw 79 Total column cloud ice water kg m**-2
tclw 78 Total column cloud liquid water kg m**-2
tco3 206 Total column ozone kg m**-2
tcwv 137 Total column vertically-integrated water vapour kg m**-2
tp 228 Total precipitation m
swvl1 39 Volumetric soil water layer 1 m m**-3
swvl2 40 Volumetric soil water layer 2 m m**-3
swvl3 41 Volumetric soil water layer 3 m m**-3
swvl4 42 Volumetric soil water layer 3 m m**-3
VII-iii-b: Pressure levels
Short Name ID Long Name Units
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
vo 138 Vorticity (relative) s**-1
d 155 Divergence s**-1
gh 156 Geopotential Height gpm
o3 203 Ozone mass mixing ratio kg kg**-1
VII-iii-c: Seasonal forecast wave monthly means
Short Name ID Long Name Units
wind 140245 10 metre wind speed m s**-1
cdww 141233 Coefficient of drag with waves -
msqs 140244 Mean square slope of waves -
mwp 140232 Mean wave period s
mp1 140220 Mean wave period based on first moment s
mp2 140221 Mean zero-crossing wave period s
pp1d 140231 Peak wave period s
swh 500071 Significant height of combined wind waves and swell m
VII-iv: Monthly mean anomalies of individual ensemble members
 VII-iv-a: Single level 

 

Short Name ID Long Name Units
10ua 171165 10 metre U wind component anomaly m s**-1
10va 171166 10 metre V wind component anomaly m s**-1
10fga 171049 10 metre wind gust anomaly m s**-1
10sia 171207 10 metre wind speed anomaly

m s**-1
2da 171168 2 metre dewpoint temperature anomaly K
2ta 171167 2 metre temperature anomaly K
cpa 171143 Convective precipitation anomaly  m

ewssara

 173180

East-West surface stress anomalous rate of accumulation

 N m**-2
ea 171182 Evaporation anomaly kg m**-2
fala 171243 Forecast albedo anomaly (0 -1)
iewsa 171229 Instantaneous X surface stress anomaly N m**-2
inssa 171230 Instantaneous Y surface stress anomaly N m**-2
licda 171025 Lake ice depth anomaly m
lmlta 171024 Lake mix-layer temperature anomaly K
lspa 171142 Stratiform precipitation (Large-scale precipitation) anomaly m
lcca 171186 Low cloud cover anomaly (0 - 1)
mx2t24a 171051 Maximum 2 metre temperature in the last 24 hours anomaly K
msla 171151 Mean sea level pressure anomaly Pa
mssrora 173009 Mean sub-surface runoff rate anomaly m of water equivalent s**-1
mn2t24a 171052 Minimum 2 metre temperature in the last 24 hours anomaly K
nsssara 173181 North-South surface stress anomalous rate of accumulation N m**-2
roara 173205 Runoff anomalous rate of accumulation m s**-1
ssta 171034 Sea surface temperature anomaly K
sica 171031 Sea-ice cover anomaly (0 - 1)
rsna 171033 Snow density anomaly kg m**-3
sda 171141 Snow depth anomaly m of water equivalent
sfara 173144 Snowfall (convective + stratiform) anomalous rate of accumulation m of water equivalent s**-1
stal1 171139 Soil temperature anomaly level 1 K
stal2 171170 Soil temperature anomaly level 2 K
stal3 171183 Soil temperature anomaly level 3 K
stal4 171236 Soil temperature anomaly level 3 K
soiara 173212 Solar insolation anomalous rate of accumulation W m**-2 s**-1
lspa 171142 Stratiform precipitation (Large-scale precipitation) anomaly m
sundara 173189 Sunshine duration anomalous rate of accumulation -
slhfara 173147 Surface latent heat flux anomalous rate of accumulation J m**-2
ssra 171176 Surface net solar radiation anomaly J m**-2
stra 171177 Surface net thermal radiation anomaly J m**-2
sshfara 173146 Surface sensible heat flux anomalous rate of accumulation J m**-2
ssrdara 173169 Surface solar radiation downwards anomalous rate of accumulation J m**-2
strda 171175 Surface thermal radiation downwards anomaly J m**-2
tsra 171178 Top net solar radiation anomaly J m**-2
ttra 171179 Top net thermal radiation anomaly J m**-2
tcca 171164 Total cloud cover anomaly (0 -1)
tciwa 171079 Total column ice water anomaly kg m**-2
tclwa 171078 Total column liquid water anomaly kg m**-2
tco3a 171206 Total column ozone anomaly kg m**-2
tcwva 171137 Total column water vapour anomaly kg m**-2
tpara 173228 Total precipitation anomalous rate of accumulation m s**-1
swval1 171039 Volumetric soil water anomaly layer 1 m**3 m**-3
swval2 171040 Volumetric soil water anomaly layer 2 m**3 m**-3
swval3 171041 Volumetric soil water anomaly layer 3 m**3 m**-3
swval4 171042 Volumetric soil water anomaly layer 4 m**3 m**-3
VII-iv-b: Pressure levels
Short Name ID Long Name Units
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
vo 138 Vorticity (relative) s**-1
d 155 Divergence s**-1
gh 156 Geopotential Height gpm
o3 203 Ozone mass mixing ratio kg kg**-1
VII-v: Individual forecast runs

VII-v-a: Single level - 12-hourly 

 

t Name ID Long Name Units
10u 165 10 metre U wind component m s**-1
10v 166 10 metre V wind component m s**-1
msl 151 Mean sea level pressure Pa
VII-v-b: Single level 24-hourly
Short Name ID Long Name Units
ttr 179 Top net long-wave (thermal) radiation J m**-2
mx2t24 51 Maximum temperature at 2 metres in the last 24 hours K
mn2t24 52 Minimum temperature at 2 metres in the last 24 hours K
gh 156 Geopotential height gpm
cl 26 Lake cover (0 - 1)
z 129 Geopotential m**2 s**-2
lsm 172 Land-sea mask (0 - 1)
dl 228007 Lake total depth m
VII-v-c: Pressure level - 12-hourly
Short Name ID Long Name Units
t 130 Temperature K
u 131 U component of wind m s**-1
vo 138 Vorticity (relative) s**-1
d 155 Divergence s**-1
gh 156 Geopotential Height gpm
z 129 Geopotential m**2 s**-2
VII-v-e Wave seasonal forecast - 24-hourly
Short Name ID Long Name Units
wind 140245 10 metre wind speed m s**-1
cdww 141233 Coefficient of drag with waves -
msqs 140244 Mean square slope of waves -
mwp 140232 Mean wave period s
mp1 140220 Mean wave period based on first moment s
mp2 140221 Mean zero-crossing wave period s
pp1d 140231 Peak wave period s
swh 500071 Significant height of combined wind waves and swell m
Type:
Real-time
Range:
Long (Months)