sgpallruc20hybrX1.c1 and sgpruc20hybrX1.c1

pyeruc20isobX1.c1, sgpallruc20isobX1.c1, sgpruc20isobX1.c1, sgpsynruc20isobX1.c1

sgpallruc60X1.c0 and sgpruc60X1.c1

The 60 km RUC was a 3-hourly analysis/forecast data analysis system. ARM routinely obtained the analysis and 0-hour RUC results every 3 hours. The analysis product was ingested as the primary source, and the 0-hour product used as a backup. However, when the analysis was not available, the 0-hour forecast was invariably missing as well. In this instance, the 3-hour or 6-hour forecast from a previous analysis was used. This information is documented in the data file header.

The following data streams were produced:
Dimensions:

sgpallruc60X1.c0
(8 files per day) sgpruc60X1.c1
(1 file per day)
time 1 (3-hr period) 8 (3-hourly periods)

x 81 (all of RUC) 12 (subset around SGP CART Site)

y 62 (all of RUC) 14 (subset around SGP CART Site)

pres 37 37

	sgpallruc60X1.c0 (8 files per day)	sgpruc60X1.c1 (1 file per day)
time	1 (3-hr period)	8 (3-hourly periods)
x	81 (all of RUC)	12 (subset around SGP CART Site)
y	62 (all of RUC)	14 (subset around SGP CART Site)
pres	37	37

valid_time(time)
forecast_period(time)
- [=-7777, analysis run (not a forecast);
- =3 or 6, when forecast from a preceding time is used to make up for a missing analysis run]
pressure at constant pressure surface (hPa) (pres)
latitude of the polar stereographic grid points (degrees North) (y,x)
longitude of the polar stereographic grid points(degrees East) (y, x)
pressure at ground surface (hPa) (time, y, x)
geometric height (above mean sea level) (m) (time, pres, y, x)
temperature (K) (time, pres, y, x)
relative humidity (percent) (time, pres, y, x)
X component of wind, oriented in the polar stereographic grid (m/s) (time, pres, y, x)
Y component of wind, oriented in the polar stereographic grid (m/s) (time, pres, y, x)

sgpfslruc60X1.c0

in measurements below x=81, y=62, z=25

u-component of wind (meters/second) ( z, y, x)
v-component of wind (meters/second) ( z, y, x)
montgomery stream function/gravity (meters) ( z, y, x)
condensation pressure (millibars) (z, y, x)
pressure (pascals) ( z, y, x)
virtual potential temperature (degrees K) ( z, y, x)
RUC mean sea level pressure (pascals) ( y,x)
soil temperature (degrees K) ( y,x)
sensible heat flux (W/m**2) ( y,x)
latent heat flux (W/m**2) y,x)
net radiation (W/m**2) (y,x)
precipitation rate (Kg/m**2/s) ( y,x)
large scale precipitation (Kg/m**2) ( y,x)
convective precipitation (Kg/m**2) ( y,x)
precipitable water (Kg/m**2) ( y,x)
pressure at tropopause (pascals) ( y,x)
potential temperature at tropopause (degrees K) ( y,x)
u-component of wind at tropopause (meters/second) ( y,x)
v-component of wind at tropopause (meters/second) ( y,x)
convective available potential energy (J/kg) ( y,x)
convective inhibition (J/kg) ( y,x)
valid time and reference time
longitude and latitude

sgpallruc40hybrX1.c1

in the following measurements x=151, y = 113, z = 40, ss=6

geopotential Height (hybrid-b grid) (gpm) (time, x, y, z)
pressure (hybrid-b grid) (Pa) (time, x, y, z)
pressure at tropopause (Pa) (time, x, y)
u-component of wind (hybrid-b grid)(m/s)(time, x, y, z)
u-component of wind at topopause (m/s) (time, x, y)
>v-component of wind (hybrid-b grid)(m/s)(time, x, y, z)
v-component of wind at topopause (m/s) (time, x, y)
pressure vertical velocity (hybrid-b grid) (Pa/s) (time, x, y, z)
environmental temperature (hybrid-b grid) (K) (time, x, y, z)
virtual potential temperature (hybrid-b grid) (K) (time, x, y, z)
potential temperature at tropopause (K) (time, x, y)
turbulent kinetic energy (hybrid-b grid) (J/kg) (time, x, y, z)
relative humidity (hybrid-b grid) (percent) (time, x, y, z)
mixing ratio of water vapor (hybrid-b grid) (kg/kg) (time, x, y, z)
mixing ratio of cloud water (hybrid-b grid) (kg/kg) (time, x, y, z)
mixing ratio of ice water (hybrid-b grid) (kg/kg) (time, x, y)
mixing ratio of snow (hybrid-b grid) (kg/kg) (time, x, y, z)
mixing ratio of graupel (hybrid-b grid) (kg/kg) (time, x, y, z)
number concentration of ice particles (hybrid-b grid) (number/m^3) (time, x, y, z)
precipitable water (kg/m^2) (time, x, y)
convective available potential energy (J/kg) (time, x, y)
convective inhibition (J/kg) (time, x, y)
sensible heat flux at surface (w/m^2) (time, x, y)
latent heat flux at surface (w/m^2) (time, x, y)
net shortwave irradiance at surface (w/m^2) (time, x, y)
net longwave irradiance at surface (w/m^2) (time, x, y)
evapotranspiration flux near surface (w/m^2) (time, x, y)
plant canopy surface water kg/m^2) (time, x, y)
evaporation from bare soil at surface (w/m^2) (time, x, y)
evaporation of canopy water near surface (w/m^2) (time, x, y)
water condensation rate near surface (m/s) (time, x, y)
rate of water dropping from canopy to ground (m/s) (time, x, y)
precipitation rate at surface (kg/m^2/s) (time, x, y)
resolvable scale precipitation at surface (kg/m^2) (time, x, y)
sub-grid scale precipitation at surface (kg/m^2) (time, x, y)
surface sub-surface soil temperature (K) (time, x, y, ss)
surface, sub-surface soil volumetric moisture (fraction) (time, x, y, ss)
surface, sub-surface soil moisture content (kg/m^2) (time, x, y, ss)
snow accumulation over 3-hr (kg/m^2) (time, x, y)
snow depth (m) (time, x, y)
snow temperature at snow or top soil level (K) (time, x, y)
surface runoff (kg/m^2) (time, x, y)
sub-surface runoff (kg/m^2) (time, x, y)

sgpallruc40isobX1.c1

in the following measurements x=151, y = 113, p = 37, m = 6

geopotential height (p-grid*) (meters) (time, x, y, p)
geopotential height at freezing level (meters) (time, x, y)
geopotential height at top freezing level (meters) (time, x, y)
earth surface height (meters) (x, y)
planetary boundary height (meters) (time, x, y)
cloud base height (meters)(time, x, y)
cloud top height (meters)(time, x, y)
convective cloud top height (meters)(time, x, y)
equilibrium level height (meters)(time, x, y)
visibility (meters)(time, x, y)
altimeter setting (pascals) (time, x, y)
pressure at mean sea level (pascals) (time, x, y)
pressure at freezing level (pascals) (time, x, y)
pressure at top freezing level (pascals) (time, x, y)
pressure at maximum wind level (pascals) (time, x, y)
maximum equivalent potential temperature presssure (pascals) (time, x, y)
pressure at tropopause (pascals) (time, x, y)
earth surface pressure (pascals) (time, x, y)
pressure tendency (3-hr) pascals/second) (time, x, y)
u-component of wind (p-grid*) (meters/second) (time,x,y,p)
u-component of wind (m-grid**) (meters/second) (time,x,y,m)
u-component of wind (10 m fixed height) (meters/second) (time, x, y,)
u-component of wind at maximum wind level (meters/second) (time, x, y,)
u-component of wind at tropopause (meters/second) (time, x, y,)
v-component of wind (p-grid*) (meters/second) (time,x,y,p)
v-component of wind (m-grid**) (meters/second) (time,x,y,m)
v-component of wind (10 m fixed height) (meters/second) (time, x, y,)
v-component of wind at maximum wind level (meters/second) (time, x, y,)
v-component of wind at tropopause (meters/second) (time, x, y,)
gust wind speed (meters/second) (time, x, y,)
vertical velocity (p-grid*) (pascals/second) (time, x, y, p)
vertical velocity (m-grid**) (pascals/second) (time, x, y, m)
environmental temperature (p-grid*) (K) (time, x, y, p)
environmental temperature (m-grid**) (K) (time, x, y, m)
environmental temperature (2 m fixed height) (K) (time, x, y)
dew point temperature (2 m fixed height) (K) (time, x, y)
dew point depression (2 m fixed height) (K) (time, x, y)
potential temperature (2 m fixed height) (K) (time, x, y)
equivalent potential temperature (K) (time, x, y)
potential temperature at tropopause (K) (time, x, y)
lifted index (K) (time, x, y)
best lifted index (K) (time, x, y)
relative humidity (p-grid*) (percent) (time, x, y, p)
relative humidity (m-grid**) (percent) (time, x, y, m)
relative humidity at freezing level (percent) (time, x, y)
relative humidity at top freezing level (percent) (time, x, y)
relative humidity (2 m fixed height) (percent) (time, x, y)
specific humidity (2 m fixed height) (percent) (time, x, y)
precipitable water (kg/m^2) (time, x, y)
convective available potential energy (J/kg) (time, x, y)
convective inhibition (J/kg) (time, x, y)
precipitation rate at surface (kg/m^2/s) (time, x, y)
resolvable scale precipitation (3 hour) (kg/m^2) (time, x, y)
resolvable Scale Precipitation (accumulated) (kg/m^2) (time, x, y)
sub-grid Scale Precipitation (3 hr) (kg/m^2) (time, x, y)
sub-grid Scale Precipitation (accumulated) (kg/m^2) (time, x, y)
categorical rain (unitless) (time, x, y)
categorical freezing rain (unitless) (time, x, y)
categorical ice pellets (unitless) (time, x, y)
categorical snow (unitless) (unitless) (time, x, y)
storm-relative helicity 0-3 km (m^2/s^2) (time, x, y)
u-component of storm motion (meters/second) (time, x, y)
v-component of storm motion (meters/second) (time, x, y)
soil moisture availability (percent) (time, x, y)
snow accumulation over 3-hr (kg/m^2) (time, x, y)
snow depth (meters) (time, x, y)
water equivalent snow depth (mm) (time, x, y)
surface runoff accumulated (kg/m^2) (time, x, y)
sub-surface runoff (kg/m^2) (time, x, y)

* p-grid 37 isobaric pressure levels

** m-grid six pressure intervals (30-0,60-30,90-60,120-90,150-120,180-150) (mb above gnd)

sgpallruc20hybrX1.c1, sgpruc20hybrX1.c1

Same as sgpallruc40hybrX1.c1 with the following exceptions:
The number of vertical levels changes from 40 to 50
The following measurements are added:

water vapor mixing ratio at surface (kg/kg) (time, x, y)
water vapor mixing ratio, 2m fixed height (kg/kg) (time, x, y)
10 meter component u-wind (m/s) (time, x, y)
10 meter component v-wind (m/s) (time, x, y)
2 meter temperature (K) (time, x, y)
snow density (kg/m^3) (time, x, y)
water equivalent of snow depth (kg/m^2) (time, x, y)
temperature inside snow or top soil level (K) (time, x, y)

The following measurement that was in sgpallruc40hybrX1.c1 is not in sgpallruc20hybrX1.c1
surface, sub-surface soil moisture content

sgpallruc20isobX1.c1, sgpruc20isobX1.c1, sgpsynruc20isobX1.c1

Same as sgpallruc40isobX1.c1 but does not contain the measurement "altimeter setting"and contains an addition measurement:
temperature at tropopause (K) (time, x, y)

Beginning 5/27/2003 the following measurement was added: storm-relative helicity 0-1 km (m^2/s^2) (time, x,y)

Beginning 6/28/2005, all the RUC 20 data streams contain the following new measurements:

Convective available potential energy, 255-0 mb above ground (J/kg)
Convective inhibition, 255-0 mb above ground (J/kg)
Temperature at surface (K)