[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[IDD #PZS-945807]: HRRR data on IDD/LDM

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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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.

  • Subject: [IDD #PZS-945807]: HRRR data on IDD/LDM
  • Date: Fri, 03 Apr 2015 08:41:30 -0600
> Hello
Hi Marcelo, 

This is Jeff, we met in Tuscaloosa...

> 
> I am contacting you to ask what would be the best way to get HRRR data
> hourly through IDD/LDM. This is for a project lead by CUAHSI (
> https://www.cuahsi.org/NFIE) and  NWS, in which we are planning to run
> NCAR's WRF-Hydro software for the cont US.
> 

Yes, aware of this plan :)

> The parameters we need are
> Incoming Short Wave Radiation (W/m2)
> Incoming Long Wave Radiation (W/m2) (I UNDERSTAND THAT THIS IS NOT
> AVAILABLE)
> Specific Humidity                (Kg/Kg)
> Air Temperature                  (K)
> Surface Pressure                 (Pa)
> Near surface widn in the u and v components, (m/s)
> Liquid water precipitation       (mm/s)
> 


Marcelo, I suspect that we can derive Long Wave by subtracting short wave from 
Net....double checking that net radiation at surface is a parameter, but pretty 
sure it is.


> Also I wonder if you have MRMS precipitation data available.


We will have it, NSSL (Nat'l Severe Storms Lab) has brought down the feed for a 
bit, we expect it to be back in time for NFIE
spring/summer workshop...I will keep on that schedule and keep you up to date.

> 
> Currently we are using THREDDS service to get the data (
> http://thredds-jumbo.unidata.ucar.edu/thredds/catalog/grib/HRRR/CONUS_3km/surface/catalog.html);
> however, we understand that GSD THREDDS is an experimental system that can
> change in any moment and we need an operational system to rely on.
> 

Yes, we are getting both the "operational" HRRR (surface fields) via the 
IDD/LDM from NCEP
AND the experimental HRRR (all levels) from NOAA ESRL/GSD...this is what is on 
thredds-jumbo currently.


I am working on this to insure stability and consistency during the NFIE 
campaign, I will have more definitive info as we get into next week re the GSD 
HRRR and the NSSL MRMS feeds...

I am in contact with the NOAA people to see if they can freeze modifications 
during the NFIE campaign and minimize downtime...

They are currently doing a major post-processing re-do, so hopefully that will 
be the last big change for awhile and provide us stability for NFIE.

Cheers, 

Jeff


> Thank you,
> --
> --
> Marcelo Somos Valenzuela, Ph.D.
> The University of Texas at Austin
> Environmental and Water Resources Engineering
> Phone: +1-512-657-9017
> Skype: masomos
> 
> 

Jeff Weber
Unidata User Support
http://www.unidata.ucar.edu

Ticket Details
===================
Ticket ID: PZS-945807
Department: Support IDD
Priority: Normal
Status: Open