Welcome

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.

 

Forums

Back

URMA wind errors at SF Bay Area ASOS sites during recent RFW/High Wind event

RSS (Opens New Window)(Opens New Window)
WB
Warren Blier, modified 4 Years ago.

URMA wind errors at SF Bay Area ASOS sites during recent RFW/High Wind event

Youngling Posts: 14 Join Date: 9/24/12 Recent Posts
Comparing 08Z Mon Oct 26 URMA winds at SF Bay Area ASOS sites with corresponding METARS
image.png

Aside from KLVK and KCCR, differences are really large.  Wondering why?

Thanks,

Warren

-------------------------------------------
Warren Blier, Ph.D.
Science and Operations Officer
NOAA/NWS San Francisco Bay Area Forecast Office
831-238-8109 (cell)
831-656-1724 (ops floor)  



Attachments:

Attachment

MM
Matthew Morris, modified 4 Years ago.

RE: URMA wind errors at SF Bay Area ASOS sites during recent RFW/High Wind event

Youngling Posts: 175 Join Date: 12/6/17 Recent Posts
Hi Warren,

When considering the URMA wind speed analysis valid 08Z 26 October, the background fields (from the HRRR) are responsible for the analyzed wind speeds being weaker than observed at the METAR sites.

The attached slide deck shows that the analyzed winds from URMA are stronger than the background winds at all METAR sites except for KSTS.  In the case of KSTS, there is a nearby mesonet station (RZAC1) that is reporting weaker winds (3.46 kts).  I would suggest taking a closer look at the data from this mesonet station to determine if it should be flagged.
Lastly, RAPv5/HRRRv4 is scheduled for implementation in December.  Any improvements to the wind forecasts in HRRRv4 will also help improve the RTMA/URMA wind analyses.

Matt

On Wed, Oct 28, 2020 at 8:31 PM VLab Notifications <VLab.Notifications@noaa.gov> wrote:
Comparing 08Z Mon Oct 26 URMA winds at SF Bay Area ASOS sites with corresponding METARS
image.png

Aside from KLVK and KCCR, differences are really large.  Wondering why?

Thanks,

Warren

-------------------------------------------
Warren Blier, Ph.D.
Science and Operations Officer
NOAA/NWS San Francisco Bay Area Forecast Office
831-238-8109 (cell)
831-656-1724 (ops floor)  




--
Warren Blier RTMA/URMA Discussion Group Virtual Lab Forum http://vlab.noaa.gov/web/715073/home/-/message_boards/view_message/12349934VLab.Notifications@noaa.gov


Attachments:

Attachment

Bookmarks

Info Icon Descriptive
  • Items Selected
Info Recycle Bin

Home

Folder
# of Items

3

There are no bookmarks in this folder.