| Description: | The RUC 20 analyses files for hours 00z and 12z may be missing
raob data between 04/18/2002-02/04/2003. This affects datastreams
sgpallruc20isobX1.00, sgpallruc20isobX1.c1, sgpruc20isobX1.c1,
sgpsynruc20isobX1.c1. sgpallruc20hybrX1.00, sgpallruc20hybrX1.c1,
and sgpruc20hybrX1.c1.
The situation was that we were picking up all data from the ruc2a directory
from NCEP's ftp server. Apparently, the 00z and 12z files in this directory
are "early look" "A" analysis files which miss most of the raob data.
Starting on 2/5/03, we started to pick up the 00z and 12z files from the
second "B" analysis from the ruc2b directory. Only data for hours 00z
and 12z are affected. Below are exerpts from Stan Benjamin of FSL regarding this
problem and how it affects the data.
Stan Benjamin in reply to a question on how the data is affected:
Feb 19 15:16:11 2003
" ... In your second question, the fields from the A analyses
will not be drastically in error. The quality for
the near-surface grids would be about equal to that of the B analysis.
The wind conditions aloft would be slightly degraded
but not much. The fields with the most degradation
would be the details of the vertical profiles of
humidity and, to a lesser extent, temperature..."
General message from Stan Benjamin (Feb 3, 2003):
"... Basically, the problem is that unless you've taken special precautions in your
ftp scripts, you've been accessing RUC analyses at 0000 and 1200 UTC that do not
assimilate most of the raob data.
Let me explain: There are 2 RUC analyses in the operational NCEP version at 00z
and 12z only. The first is an "early look" analysis, called the "A" analysis
that misses most of the raob data (although it does have most of the other obs
in it - profiler, aircraft, sfc, etc.). The 00z and 12z RUC forecasts do NOT
run off the "A" analysis. Instead, a second analysis called the "B" analysis
with a later (30 min) data cut-off to catch raob data is run, and then the
forecast is run.
At the NCEP ftp site, the ruc2a directories contain the "A" analyses and
forecasts initialized from the "B" analysis. Yes, a little confusing. To
obtain the "B" analyses, you must go to the corresponding ruc2b directory.
In other words, you must access two different directories to obtain the best
RUC analysis and forecast (from the B run) at 0000 and 1200 UTC. Again,
there is no B run at times other than 0000 and 1200 UTC.
The information on the RUC web site about ftp'ing from the NCEP-ftp site was NOT
correct about this issue until this afternoon. It is now corrected (see
http://ruc.fsl.noaa.gov/ruc20.data-access.html). ..." |
| Measurements: | sgpruc20hybrX1.c1: - Sensible Heat Flux at Surface(fluxsensiblesrf)
- Pressure Vertical Velocity (hybrid-b grid)(velocityw)
- Turbulent Kinetic Energy (hybrid-b grid)(tketurb)
- v-Component of Wind at Tropopause(windvtrop)
- Plant Canopy Surface Water(watercanopy)
- Pressure at Tropopause(pressuretrop)
- Mixing Ratio of Ice Water (hybrid-b grid)(mxratioice)
- Surface Runoff(runoffsrf)
- Water Condensation Rate near Surface(condensewaterratesrf)
- Mixing Ratio of Cloud Water (hybrid-b grid)(mxratioliquid)
- snow density(snowdensity)
- Time offset of tweaks from base_time(time_offset)
- Snow Accumulation over 3-hr(snowaccum)
- Convective Inhibition(cinhib)
- Evaporation from Bare Soil at Surface(evapsoilsrf)
- Mixing Ratio of Snow (hybrid-b grid)(mxratiosnow)
- Latent Heat Flux at Surface(fluxlatentsrf)
- Mixing Ratio of Rain Water (hybrid-b grid)(mxratiorain)
- u-Component of Wind (hybrid-b grid)(windu)
- v-Component of Wind (hybrid-b grid)(windv)
- Number Concentration of Ice Particles (hybrid-b grid)(ndensice)
- Precipitation Rate at Surface(preciprate)
- Precipitable water vapr, from MWR (through lssonde)(pwv)
- 2 meter temperature(temp2m)
- Sub-surface Runoff(runoffsubsrf)
- Resolvable Scale Precipitation at Surface(precipresolved)
- north latitude(latitude)
- 10 meter component v-wind(windv10m)
- atmospheric pressure at mean sea level and at tropopause (NGM250 predicted)(pressure)
- Evaporation of Canopy Water near Surface(evapcanopysrf)
- Surface,Sub-surface Soil Temperature(tempsoilsrfsubsrf)
- base time(base_time)
- Rate of Water Dropping from Canopy to Ground(dropwaterratesrf)
- MAPS Pressure at Mean Sea Level(pressuremsl)
- Snow Temperature at Snow or Top Soil Level(snowtemp)
- east longitude(longitude)
- Surface,Sub-surface Soil Volumetric Moisture(moistsoilvolumesrfsubsrf)
- Convective Available Potential Energy(cape)
- u-Component of Wind at Tropopause(windutrop)
- Virtual Potential Temperature (hybrid-b grid)(tempvirtpot)
- Mixing Ratio of Water Vapor (hybrid-b grid)(mxratiovapor)
- Evapotranspiration Flux near Surface(fluxevaptranssrf)
- water equivalent of snow depth(snowdepthwaterequiv)
- Relative humidity inside the instrument enclosure(rh)
- temperature inside snow or top soil level(snowtempinside)
- Geopotential Height (hybrid-b grid)(heightgp)
- forecast period(forecast_period)
- 10 meter component u-wind(windu10m)
- Surface/Sub-surface Heights(heightss)
- Net Shortwave Irradiance at Surface(fluxswnetsrf)
- time(time)
- Beam 0 Temperature(temp)
- Altitude(altitude)
- Potential Temperature at Tropopause(temppottrop)
- Snow Depth(snowdepth)
- water vapor mixing ratio, 2m fixed height(mxratiovapor2m)
- Net Longwave Irradiance at Surface(fluxlwnetsrf)
- Mixing Ratio of Graupel (hybrid-b grid)(mxratiograupel)
- Sub-grid Scale Precipitation at Surface(precipsubgrid)
- water vapor mixing ratio at surface(mxratiovaporsfc)
sgpallruc20hybrX1.c1: - Mixing Ratio of Rain Water (hybrid-b grid)(mxratiorain)
- Evaporation from Bare Soil at Surface(evapsoilsrf)
- Precipitable water vapr, from MWR (through lssonde)(pwv)
- 10 meter component v-wind(windv10m)
- Evapotranspiration Flux near Surface(fluxevaptranssrf)
- atmospheric pressure at mean sea level and at tropopause (NGM250 predicted)(pressure)
- u-Component of Wind (hybrid-b grid)(windu)
- forecast period(forecast_period)
- Convective Available Potential Energy(cape)
- Net Longwave Irradiance at Surface(fluxlwnetsrf)
- Mixing Ratio of Graupel (hybrid-b grid)(mxratiograupel)
- water vapor mixing ratio, 2m fixed height(mxratiovapor2m)
- base time(base_time)
- north latitude(latitude)
- Beam 0 Temperature(temp)
- Geopotential Height (hybrid-b grid)(heightgp)
- Surface,Sub-surface Soil Volumetric Moisture(moistsoilvolumesrfsubsrf)
- water vapor mixing ratio at surface(mxratiovaporsfc)
- Surface Runoff(runoffsrf)
- Mixing Ratio of Ice Water (hybrid-b grid)(mxratioice)
- Time offset of tweaks from base_time(time_offset)
- Rate of Water Dropping from Canopy to Ground(dropwaterratesrf)
- 2 meter temperature(temp2m)
- Mixing Ratio of Cloud Water (hybrid-b grid)(mxratioliquid)
- Mixing Ratio of Snow (hybrid-b grid)(mxratiosnow)
- Potential Temperature at Tropopause(temppottrop)
- v-Component of Wind (hybrid-b grid)(windv)
- v-Component of Wind at Tropopause(windvtrop)
- Relative humidity inside the instrument enclosure(rh)
- snow density(snowdensity)
- Water Condensation Rate near Surface(condensewaterratesrf)
- Sensible Heat Flux at Surface(fluxsensiblesrf)
- Plant Canopy Surface Water(watercanopy)
- MAPS Pressure at Mean Sea Level(pressuremsl)
- Snow Temperature at Snow or Top Soil Level(snowtemp)
- Surface/Sub-surface Heights(heightss)
- Snow Depth(snowdepth)
- Precipitation Rate at Surface(preciprate)
- Convective Inhibition(cinhib)
- Sub-grid Scale Precipitation at Surface(precipsubgrid)
- Altitude(altitude)
- Sub-surface Runoff(runoffsubsrf)
- 10 meter component u-wind(windu10m)
- Net Shortwave Irradiance at Surface(fluxswnetsrf)
- water equivalent of snow depth(snowdepthwaterequiv)
- Number Concentration of Ice Particles (hybrid-b grid)(ndensice)
- Evaporation of Canopy Water near Surface(evapcanopysrf)
- Resolvable Scale Precipitation at Surface(precipresolved)
- Pressure at Tropopause(pressuretrop)
- Virtual Potential Temperature (hybrid-b grid)(tempvirtpot)
- east longitude(longitude)
- Mixing Ratio of Water Vapor (hybrid-b grid)(mxratiovapor)
- Snow Accumulation over 3-hr(snowaccum)
- temperature inside snow or top soil level(snowtempinside)
- Surface,Sub-surface Soil Temperature(tempsoilsrfsubsrf)
- Turbulent Kinetic Energy (hybrid-b grid)(tketurb)
- Latent Heat Flux at Surface(fluxlatentsrf)
- Pressure Vertical Velocity (hybrid-b grid)(velocityw)
- u-Component of Wind at Tropopause(windutrop)
sgpsynruc20isobX1.c1: - v-Component of Wind (p grid)(windvp)
- Cloud Top Height(heightcldtop)
- Equivalent Potential temperature(tempeqpot)
- Categorical Ice Pellets(caticepellets)
- 2 meter temperature(temp2m)
- Specific Humidity (2 m fixed height)(sh2m)
- Resolvable Scale Precipitation (Accumulated)(precipresolvedacc)
- Relative Humidity (2 m fixed height)(rh2m)
- u-Component of Wind at Maximum Wind Level(winduwindmax)
- u-Component of Wind (p grid)(windup)
- Pressure at Freezing Level(pressurefrz)
- Resolvable Scale Precipitation (3 hr)(precipresolved3hr)
- east longitude(longitude)
- Relative Humidity at Top Freezing Level(rhfrztop)
- Altitude(altitude)
- Maximum Equivalent Potential Temperature Pressure(pressuretempeqpotmax)
- Pressure Tendency (3-hr)(pressuretend)
- Best Lifted Index(indexliftedbest)
- Pressure at Maximum Wind Level(pressurewindmax)
- Temperature at Tropopause(temptrop)
- Gust Wind Speed(windgustspeed)
- Geopotential Height (p grid)(heightgpp)
- Vertical Velocity (m grid)(velocitywm)
- Precipitation Rate at Surface(preciprate)
- Water Equivalent Snow Depth(snowdepthwatereq)
- Vertical Velocity (p grid)(velocitywp)
- 10 meter component v-wind(windv10m)
- Dew Point Depression (2 m fixed height)(tempdewptdep2m)
- Relative Humidity (m grid)(rhm)
- Convective Cloud Top Height(heightcldtopconv)
- Earth Surface Pressure(pressuresrf)
- Geopotential Height at Freezing Level(heightgpfrz)
- north latitude(latitude)
- Potential Temperature (2 m fixed height)(temppot2m)
- Categorical Rain(catrain)
- Time offset of tweaks from base_time(time_offset)
- Earth Surface Height(heightsrf)
- Cloud Base Height(heightcldbase)
- Convective Inhibition(cinhib)
- Relative Humidity (p grid)(rhp)
- 10 meter component u-wind(windu10m)
- Relative Humidity at Freezing Level(rhfrz)
- u-Component of Storm Motion(stormmotionu)
- v-Component of Wind at Tropopause(windvtrop)
- Sub-surface Runoff(runoffsubsrf)
- Precipitable water vapr, from MWR (through lssonde)(pwv)
- Pressure at Tropopause(pressuretrop)
- Geopotential Height at Top Freezing Level(heightgpfrztop)
- Sub-grid Scale Precipitation (Accumulated)(precipsubgridacc)
- forecast period(forecast_period)
- v-Component of Wind at Maximum Wind Level(windvwindmax)
- Storm-Relative Helicity(stormrelhelicity)
- Potential Temperature at Tropopause(temppottrop)
- u-Component of Wind at Tropopause(windutrop)
- Planetary Boundary Height(heightpbl)
- Equilibrium Level Height(heightequillevel)
- Lifted Index(indexlifted)
- Pressure Intervals (30-0,60-30,90-60,120-90,150-120,180-150) of the m grid(pressuremgrid)
- v-Component of Storm Motion(stormmotionv)
- Dew Point Temperature (2 m fixed height)(tempdewpt2m)
- base time(base_time)
- Sub-grid Scale Precipitation (3 hr)(precipsubgrid3hr)
- Environmental Temperature (p grid)(tempp)
- Surface Runoff Accumulated(runoffsrfacc)
- Pressures of the p grid(pressurepgrid)
- v-Component of Wind (m grid)(windvm)
- Environmental Temperature (m grid)(tempm)
- Soil Moisture Availability(moistsoilavail)
- MAPS Pressure at Mean Sea Level(pressuremsl)
- Vertical visibility(visibility)
- Pressure at Top Freezing Level(pressurefrztop)
- Convective Available Potential Energy(cape)
- Snow Depth(snowdepth)
- Snow Accumulation over 3-hr(snowaccum)
- Categorical Freezing Rain(catfreezerain)
- Categorical Snow(catsnow)
- u-Component of Wind (m grid)(windum)
sgpallruc20hybrX1.00: - null(Raw data stream - documentation not supported)
sgpallruc20isobX1.c1: - Dew Point Depression (2 m fixed height)(tempdewptdep2m)
- Sub-grid Scale Precipitation (3 hr)(precipsubgrid3hr)
- Convective Available Potential Energy(cape)
- Earth Surface Pressure(pressuresrf)
- Cloud Base Height(heightcldbase)
- v-Component of Wind at Tropopause(windvtrop)
- Relative Humidity at Top Freezing Level(rhfrztop)
- forecast period(forecast_period)
- Environmental Temperature (p grid)(tempp)
- Pressures of the p grid(pressurepgrid)
- Temperature at Tropopause(temptrop)
- Vertical Velocity (p grid)(velocitywp)
- v-Component of Wind (p grid)(windvp)
- Snow Depth(snowdepth)
- Best Lifted Index(indexliftedbest)
- Relative Humidity (m grid)(rhm)
- Relative Humidity (p grid)(rhp)
- Time offset of tweaks from base_time(time_offset)
- Pressure at Freezing Level(pressurefrz)
- Geopotential Height at Freezing Level(heightgpfrz)
- Vertical Velocity (m grid)(velocitywm)
- Surface Runoff Accumulated(runoffsrfacc)
- Pressure at Maximum Wind Level(pressurewindmax)
- u-Component of Wind (m grid)(windum)
- base time(base_time)
- east longitude(longitude)
- Categorical Rain(catrain)
- 10 meter component u-wind(windu10m)
- Earth Surface Height(heightsrf)
- Resolvable Scale Precipitation (3 hr)(precipresolved3hr)
- Categorical Ice Pellets(caticepellets)
- Equivalent Potential temperature(tempeqpot)
- Vertical visibility(visibility)
- north latitude(latitude)
- Geopotential Height at Top Freezing Level(heightgpfrztop)
- Pressure at Top Freezing Level(pressurefrztop)
- Lifted Index(indexlifted)
- Relative Humidity (2 m fixed height)(rh2m)
- v-Component of Storm Motion(stormmotionv)
- u-Component of Storm Motion(stormmotionu)
- Potential Temperature at Tropopause(temppottrop)
- Storm-Relative Helicity(stormrelhelicity)
- Water Equivalent Snow Depth(snowdepthwatereq)
- Cloud Top Height(heightcldtop)
- Maximum Equivalent Potential Temperature Pressure(pressuretempeqpotmax)
- Equilibrium Level Height(heightequillevel)
- Sub-surface Runoff(runoffsubsrf)
- Pressure Intervals (30-0,60-30,90-60,120-90,150-120,180-150) of the m grid(pressuremgrid)
- u-Component of Wind (p grid)(windup)
- Convective Cloud Top Height(heightcldtopconv)
- u-Component of Wind at Maximum Wind Level(winduwindmax)
- v-Component of Wind at Maximum Wind Level(windvwindmax)
- Categorical Freezing Rain(catfreezerain)
- Geopotential Height (p grid)(heightgpp)
- MAPS Pressure at Mean Sea Level(pressuremsl)
- Specific Humidity (2 m fixed height)(sh2m)
- Convective Inhibition(cinhib)
- Precipitation Rate at Surface(preciprate)
- Environmental Temperature (m grid)(tempm)
- u-Component of Wind at Tropopause(windutrop)
- Pressure Tendency (3-hr)(pressuretend)
- v-Component of Wind (m grid)(windvm)
- Relative Humidity at Freezing Level(rhfrz)
- Pressure at Tropopause(pressuretrop)
- Categorical Snow(catsnow)
- Soil Moisture Availability(moistsoilavail)
- 10 meter component v-wind(windv10m)
- Planetary Boundary Height(heightpbl)
- Precipitable water vapr, from MWR (through lssonde)(pwv)
- Sub-grid Scale Precipitation (Accumulated)(precipsubgridacc)
- Potential Temperature (2 m fixed height)(temppot2m)
- Resolvable Scale Precipitation (Accumulated)(precipresolvedacc)
- Altitude(altitude)
- Gust Wind Speed(windgustspeed)
- Snow Accumulation over 3-hr(snowaccum)
- 2 meter temperature(temp2m)
- Dew Point Temperature (2 m fixed height)(tempdewpt2m)
sgpallruc20isobX1.00: - null(Raw data stream - documentation not supported)
sgpruc20isobX1.c1: - Geopotential Height (p grid)(heightgpp)
- Lifted Index(indexlifted)
- MAPS Pressure at Mean Sea Level(pressuremsl)
- Pressure Tendency (3-hr)(pressuretend)
- Convective Inhibition(cinhib)
- Relative Humidity (2 m fixed height)(rh2m)
- Environmental Temperature (p grid)(tempp)
- forecast period(forecast_period)
- v-Component of Wind at Maximum Wind Level(windvwindmax)
- Dew Point Depression (2 m fixed height)(tempdewptdep2m)
- Snow Depth(snowdepth)
- u-Component of Storm Motion(stormmotionu)
- Specific Humidity (2 m fixed height)(sh2m)
- Sub-surface Runoff(runoffsubsrf)
- v-Component of Storm Motion(stormmotionv)
- Equilibrium Level Height(heightequillevel)
- Snow Accumulation over 3-hr(snowaccum)
- Pressure at Tropopause(pressuretrop)
- 2 meter temperature(temp2m)
- Convective Cloud Top Height(heightcldtopconv)
- Relative Humidity at Top Freezing Level(rhfrztop)
- Pressure at Top Freezing Level(pressurefrztop)
- Earth Surface Height(heightsrf)
- v-Component of Wind (p grid)(windvp)
- v-Component of Wind at Tropopause(windvtrop)
- v-Component of Wind (m grid)(windvm)
- Potential Temperature (2 m fixed height)(temppot2m)
- Relative Humidity at Freezing Level(rhfrz)
- base time(base_time)
- Resolvable Scale Precipitation (3 hr)(precipresolved3hr)
- Storm-Relative Helicity(stormrelhelicity)
- north latitude(latitude)
- Categorical Ice Pellets(caticepellets)
- Relative Humidity (p grid)(rhp)
- Convective Available Potential Energy(cape)
- Environmental Temperature (m grid)(tempm)
- Resolvable Scale Precipitation (Accumulated)(precipresolvedacc)
- Precipitation Rate at Surface(preciprate)
- Categorical Rain(catrain)
- Water Equivalent Snow Depth(snowdepthwatereq)
- u-Component of Wind (m grid)(windum)
- 10 meter component u-wind(windu10m)
- Earth Surface Pressure(pressuresrf)
- Vertical visibility(visibility)
- Pressure Intervals (30-0,60-30,90-60,120-90,150-120,180-150) of the m grid(pressuremgrid)
- Sub-grid Scale Precipitation (Accumulated)(precipsubgridacc)
- u-Component of Wind at Maximum Wind Level(winduwindmax)
- Gust Wind Speed(windgustspeed)
- u-Component of Wind (p grid)(windup)
- east longitude(longitude)
- Categorical Freezing Rain(catfreezerain)
- Geopotential Height at Freezing Level(heightgpfrz)
- Relative Humidity (m grid)(rhm)
- Dew Point Temperature (2 m fixed height)(tempdewpt2m)
- Precipitable water vapr, from MWR (through lssonde)(pwv)
- Planetary Boundary Height(heightpbl)
- 10 meter component v-wind(windv10m)
- Temperature at Tropopause(temptrop)
- Categorical Snow(catsnow)
- Pressure at Maximum Wind Level(pressurewindmax)
- Pressures of the p grid(pressurepgrid)
- Altitude(altitude)
- Equivalent Potential temperature(tempeqpot)
- Vertical Velocity (p grid)(velocitywp)
- u-Component of Wind at Tropopause(windutrop)
- Time offset of tweaks from base_time(time_offset)
- Geopotential Height at Top Freezing Level(heightgpfrztop)
- Cloud Base Height(heightcldbase)
- Surface Runoff Accumulated(runoffsrfacc)
- Maximum Equivalent Potential Temperature Pressure(pressuretempeqpotmax)
- Pressure at Freezing Level(pressurefrz)
- Soil Moisture Availability(moistsoilavail)
- Vertical Velocity (m grid)(velocitywm)
- Potential Temperature at Tropopause(temppottrop)
- Cloud Top Height(heightcldtop)
- time(time)
- Best Lifted Index(indexliftedbest)
- Sub-grid Scale Precipitation (3 hr)(precipsubgrid3hr)
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