RUC files and variables
Updated 22 April 2002 for RUC20
Inventory of all RUC files from NCEP at
http://www.nco.ncep.noaa.gov/pmb/products/ruc2
All 3 file types available at 20km and 40km resolution.
native grid (hybrid-b) - 50 native coordinate levels (bgrb)
3-d - 14
u:long_name = "u-component of wind - b";
v:long_name = "v-component of wind - b";
Z:long_name = "height - b" ;
p:long_name = "pressure - b";
vpt:long_name = "virtual potential temperature - b";
qv:long_name = "water vapor mixing ratio - b";
w:long_name = "vertical velocity - b";
qc:long_name = "cloud water mixing ratio - b";
qr:long_name = "rain water mixing ratio - b";
qi:long_name = "ice mixing ratio - b";
qs:long_name = "snow mixing ratio - b";
qg:long_name = "graupel mixing ratio - b";
qin:long_name = "cloud ice number concentration - b";
tke:long_name = "turbulence kinetic energy - b";
2-d (46)
MMSP:long_name = "MAPS mean sea level pressure";
ST:long_name = "soil temperature at surface";
SHF:long_name = "sensible heat flux";
LHF:long_name = "latent heat flux";
LWNR:long_name = "net longwave radiation at surface";
PR:long_name = "precipitation rate";
LgSP:long_name = "resolvable scale precipitation";
ConvP:long_name = "sub-grid scale precipitation";
PW:long_name = "precipitable water";
Tp:long_name = "pressure at tropopause";
Tpot:long_name = "potential temperature at tropopause";
Tu:long_name = "u-component of wind at tropopause";
Tv:long_name = "v-component of wind at tropopause";
CAPE:long_name = "convective available potential energy";
CIn:long_name = "convective inhibition";
ST1:long_name = "soil temperature at level 1 below surface";
ST2:long_name = "soil temperature at level 2 below surface";
ST3:long_name = "soil temperature at level 3 below surface";
ST4:long_name = "soil temperature at level 4 below surface";
ST5:long_name = "soil temperature at the bottom";
SM:long_name = "soil volumetric moisture content at surface";
SM1:long_name = "soil volumetric moisture content at level 1";
SM2:long_name = "soil volumetric moisture content at level 2";
SM3:long_name = "soil volumetric moisture content at level 3";
SM4:long_name = "soil volumetric moisture content at level 4";
SM4:long_name = "soil volumetric moisture content at level 4";
EDIR:long_name = "direct evaporation from bare soil";
EC:long_name = "evaporation of canopy water";
CANWAT:long_name = "canopy water";
ETT:long_name = "evapotranspiration flux";
DEW:long_name = "water condensation rate near surface";
DRIP:long_name = "rate of water dropping from canopy to ground";
SWNR:long_name = "net shortwave radiation at surface";
SnwAcc:long_name = "snow accumulation";
SnwCov:long_name = "snow depth";
STsnow:long_name = "snow temperature - snow or top soil level";
Rnoff:long_name = "surface runoff";
SubRnoff:long_name = "sub-surface runoff";
'temperature inside snow or top soil level'
'water vapor mixing ratio at surface'
'water equivalent of snow depth'
'snow density'
'temperature, 2m fixed height'
'water vapor mixing ratio, 2m fixed height'
'u-component of wind, 10m fixed height'
'v-component of wind, 10m fixed height'
(last 8 added for RUC20 output as of 4/17/2002)
isobaric main (6 3-d plus 88 2-d variables) (pgrb)
3-d - 37 isobaric (25 mb, 1000-100) levels (6)
Z:long_name = "height - p" ;
T:long_name = "temperature - p";
RH:long_name = "relative humidity - p" ;
U:long_name = "u-component of wind - p";
V:long_name = "v-component of wind - p";
VV:long_name = "vertical velocity - p" ;
2-d - 6 mean layers (5 x 6 = 30)
(0-30,30-60,60-90,90-120,120-150,150-180 mb above surface)
Tm:long_name = "temperature - m";
RHm:long_name = "relative humidity - m" ;
Um:long_name = "u-component of wind - m";
Vm:long_name = "v-component of wind - m";
VVm:long_name = "vertical velocity - m " ;
2-d
surface fields (13)
u:long_name = "u-component of wind - s";
v:slong_name = "v-component of wind - s";
pt3:long_name = "3-hr pressure tendency";
pot:long_name = "potential temperature";
temp:long_name = "temperature - s";
sh:long_name = "specific humidity";
dpt:long_name = "dew point temperature";
dpd:long_name = "dew point depression";
mslp:long_name = "MAPS mean sea level pressure";
surface pressure
thetae:long_name = "equivalent potential temperature";
earth surface height
other (23)
CAPE:long_name = "convective available potential energy";
CIn:long_name = "convective inhibition";
LI:long_name = "lifted index";
BLI:long_name = "best lifted index";
LgSP1h:long_name = "resolvable scale precipitation - 1h";
ConvP1h:long_name = "sub-grid scale precipitation - 1h";
LgSP3h:long_name = "resolvable scale precipitation - 3h";
ConvP3h:long_name = "sub-grid scale precipitation - 3h";
catrain:long_name = "categorical rain";
catfrzr:long_name = "categorical freezing rain";
caticep:long_name = "categorical ice pellets";
catsnow:long_name = "categorical snow";
snacc:long_name = "snow accumulation";
helic:long_name = "helicity";
PR:long_name = "precipitation rate";
SMA:long_name = "soil moisture availability";
Rnoff:long_name = "surface runoff";
Rnoff:long_name = "surface runoff"; (repeated accidentally)
snow depth
precipitable water
relative humidity at surface
u-component of storm motion
v-component of storm motion
gust wind speed
cloud base height
cloud top height
visibility
maximum equivalent potential temperature pressure
convective cloud top height
equilibrium level height
PBL height
special level (13)
pfr:long_name = "pressure - frz";
zfr:long_name = "height - frz";
rhfr:long_name = "relative humidity - frz";
pressure at top freezing level
geopotential height at top freezing level
relative humidity at top freezing level
Tp:long_name = "pressure at tropopause";
Tpot:long_name = "potential temperature at tropopause";
temperature at tropopause
Tu:long_name = "u-component of wind at tropopause";
Tv:long_name = "v-component of wind at tropopause";
Tv:long_name = "v-component of wind at tropopause";
temperature at tropopause
PMW:long_name = "pressure at max wind level";
UMW:long_name = "u-component of wind at max wind level";
VMW:long_name = "v-component of wind at max wind level";
surface (sgrb)
3-d - none
2-d
surface (11)
u:long_name = "u-component of wind - s";
v:slong_name = "v-component of wind - s";
pt3:long_name = "3-hr pressure tendency";
pot:long_name = "potential temperature";
temp:long_name = "temperature - s";
sh:long_name = "specific humidity";
dpt:long_name = "dew point temperature";
dpd:long_name = "dew point depression";
mslp:long_name = "MAPS mean sea level pressure";
surface pressure
thetae:long_name = "equivalent potential temperature";
other (14)
CAPE:long_name = "convective available potential energy";
CIn:long_name = "convective inhibition";
LI:long_name = "lifted index";
BLI:long_name = "best lifted index";
LgSP3h:long_name = "resolvable scale precipitation - 3h";
ConvP3h:long_name = "sub-grid scale precipitation - 3h";
LgSP1h:long_name = "resolvable scale precipitation - 1h";
ConvP1h:long_name = "sub-grid scale precipitation - 1h";
catrain:long_name = "categorical rain";
catfrzr:long_name = "categorical freezing rain";
caticep:long_name = "categorical ice pellets";
catsnow:long_name = "categorical snow";
snacc:long_name = "snow accumulation";
helic:long_name = "helicity";
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