This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
Hi Sean,
I’ve reviewed the variable list for the CONUS_3km HRRR from here:
http://thredds-jumbo.unidata.ucar.edu/thredds/metadata/ grib/HRRR/CONUS_3km/surface/ TwoD?metadata=variableMap
i don’t see MSLP in the list, only surface pressure. Is MSLP available for this version of the HRRR?
Also, do I want "Total_precipitation_surface_Mixed_intervals_Accumulation (kg.m-2)”? It looks like that is the only accumulated precip variable available.
A full grib2 surface file includes MSLMA_P0_L101_GLC0 (MSLP) and APCP_P8_L1_GLC0_acc1h through APCP_P8_L1_GLC0_acc48h, so those the fields I would like….
Ian
> On Nov 17, 2017, at 2:39 PM, Sean Arms <address@hidden> wrote:
>
> Greetings Ian,
>
> When using NCSS, you need to make sure all of the variables in your request have the same verticals coordinate system. Try making two requests - one for u and v, and a second for mslp and precip.
>
> Cheers,
>
> Sean
>
> On Fri, Nov 17, 2017 at 2:11 PM Ian Wittmeyer <address@hidden> wrote:
> Hi Sean,
>
> I am trying to subset the HRRR CONUS_3km surface files because we just want a few variables (U-component of wind, V-component of wind, MSLP, 1-hour accumulated precip).
>
> “Pressure_reduced_to_MSL_msl" and “Total_precipitation_surface_1_Hour_Accumulation" don’t work for me.
>
> I am able to subset and download U and V, but not MSLP or precip.
>
> I am using the following URL for the variable names I want:
>
> http://thredds-jetstream.unidata.ucar.edu/thredds/ncss/ grib/NCEP/HRRR/CONUS_2p5km/ TwoD/dataset.html
>
> I like to use NCL and have dumped the file header with ncl_filedump using a complete HRRR CONUS_3km surface file to look at the variable names and I still am not able to guess what I am supposed to use for MSLP and precip. Any ideas?
>
> thanks,
>
> Ian
>
>
>