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Welcome to the RTMA/URMA VLab community!

The purpose of this community is to facilitate feedback and discussion on the RTMA/URMA system. 

Meeting notes are available under the Google Drive Folder linked above.

To learn more about our next upgrade, see the asset publication below.

Use the System Overview to learn more about the system in general.

Use the forum to ask questions about the system and join the discussion with other users and the development team. 

Note that there are two forums: one for precipitation issues and one for all other variables.

You can post to the precip issues forum by sending an email to qpe.rtma.urma.feedback.vlab@noaa.gov.  For all other issues, you can post by sending an email to rtma.feedback.vlab@noaa.gov.  Please note that you must have a user account to post to the forum.  If you do not have an account, please contact matthew.t.morris@noaa.gov.

We recently added the ability for NWS Regional or WFO personnel to request that stations be removed from the analysis.  To access this, click on the "Station Reject Lists and Requests" tab.

There has been recent interest in knowing exact station locations, especially those of METAR sites.  Our METAR information table is under the "METAR Location Info" tab.

Users may also be interested in the National Blend of Models VLab community.

We appreciate any feedback on how this page or community could be improved.  You can submit such feedback via the above email handle or forum.

 

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Station temperature data being rejected...MT

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DB
David Bernhardt, modified 2 Years ago.

Station temperature data being rejected...MT

Youngling Posts: 27 Join Date: 9/24/12 Recent Posts
We see this happening again where the observations that sit in shallow valleys and develop strong cooling due to nocturnal inversions are rejected by the RTMA/URMA analysis. This is causing 10-15 degree errors in overnight lows in areas without a lot of complex terrain.

These are from 11/9/2021 ...the 07Z collection of observations. These stations are in north central Montana.




Dave Bernhardt
TFX
DB
David Bernhardt, modified 2 Years ago.

RE: Station temperature data being rejected...MT

Youngling Posts: 27 Join Date: 9/24/12 Recent Posts
The images did not attach...


On Tue, Nov 9, 2021 at 8:36 AM VLab Notifications <VLab.Notifications@noaa.gov> wrote:
We see this happening again where the observations that sit in shallow valleys and develop strong cooling due to nocturnal inversions are rejected by the RTMA/URMA analysis. This is causing 10-15 degree errors in overnight lows in areas without a lot of complex terrain.

These are from 11/9/2021 ...the 07Z collection of observations. These stations are in north central Montana.




Dave Bernhardt
TFX

--
David Bernhardt RTMA/URMA Discussion Group Virtual Lab Forum http://vlab.noaa.gov/web/715073/home/-/message_boards/view_message/18855706VLab.Notifications@noaa.gov

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Matthew Morris, modified 2 Years ago.

RE: Station temperature data being rejected...MT

Youngling Posts: 158 Join Date: 12/6/17 Recent Posts
Hi Dave,

The observations from CWOP stations C1334 and E9427 are rejected based on the quality mark encoded in the observation file.  That quality mark is based on the MADIS flags, as well as a QC check that is performed by the obs processing code using the GFS.  We could look into disabling that (internal) quality mark based QC in the future (for RTMA only) in favor of our own QC from the automated QC package that is under development for 3D-RTMA.

Thanks,
Matt

On Tue, Nov 9, 2021 at 11:06 AM VLab Notifications <VLab.Notifications@noaa.gov> wrote:
The images did not attach...


On Tue, Nov 9, 2021 at 8:36 AM VLab Notifications <VLab.Notifications@noaa.gov> wrote:
We see this happening again where the observations that sit in shallow valleys and develop strong cooling due to nocturnal inversions are rejected by the RTMA/URMA analysis. This is causing 10-15 degree errors in overnight lows in areas without a lot of complex terrain.

These are from 11/9/2021 ...the 07Z collection of observations. These stations are in north central Montana.




Dave Bernhardt
TFX

--
David Bernhardt RTMA/URMA Discussion Group Virtual Lab Forum http://vlab.noaa.gov/web/715073/home/-/message_boards/view_message/18855706VLab.Notifications@noaa.gov

--
David Bernhardt RTMA/URMA Discussion Group Virtual Lab Forum http://vlab.noaa.gov/web/715073/home/-/message_boards/view_message/18855962 VLab.Notifications@noaa.gov

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