NOUS42 KWBC 251101
PNSWSH
Public Information Statement, Comment Request
National Weather Service Headquarters, Washington DC
702 AM EDT Tue Mar 25 2014
To:Subscribers:
-Family of Services
-NOAA Weather Wire Service
-Emergency Managers Weather Information Network
-NOAAPORT
Other NWS Partners, Users and Employees
From:Bill Lapenta
Acting Director, Environmental Modeling Center
National Centers for Environmental Prediction (NCEP)
Subject:Soliciting Comments through April 23, 2014 on Modifying
Product Dissemination Time of Hurricane Weather
Research and Forecast (HWRF) System Products
NCEP is proposing to upgrade the Hurricane Weather Research and
Forecast (HWRF) modeling system in May 2014. This upgrade would
resultin HWRF products being distributed to the National
Hurricane Center (NHC) and to the public up to 20 minutes later
thanthe current distribution time (and still be able to meet the
NHC deadline of t+6).NWS is seeking comments on this proposed
upgradeand distribution schedule change by April 23, 2014.
The proposed upgrades to the HWRF modeling system would be:
- Increase in vertical resolution from 42 levels to 61 levels and
raise the model top from 50 hPa to 2 hPa
- Expand the size of intermediate (9km) domain by 20 percent and
inner most domain (3km) by 10 percent
- Implement high-resolution MPIPOM-TC Ocean Model for Atlantic
and Eastern Pacific basins
- Implement RRTMG radiation and upgraded Ferrier-Aligo
Microphysics scheme
The change would improve hurricane track, intensity and structure
predictionfor users.
The delayed delivery time would affect all HWRF products
distributedthrough the NWS ftp server and the NCEP ftp/http
server.
More details about the HWRF are available at:
http://www.emc.ncep.noaa.gov/HWRF/
At the close of the public comment period, NWS will evaluate the
commentsto determine whether to proceed with this upgrade to the
HWRF as planned.If a decision is made to move forward, a
Technical Information Notice will be issued containing the
implementationdate and more details about the upgrade and
resultantproduct delays.
Please send comments on this proposal to:
Vijay Tallapragada,
Hurricane Team Leader
NWS/NCEP Environmental Modeling Center
301-683-3672
Vijay.Tallapragada@xxxxxxxx <mailto:Vijay.Tallapragada@xxxxxxxx>
National Public Information Statements are online at:
http://www.weather.gov/os/notif.htm