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-------- Original Message --------
585
NOUS41 KWBC 261510
PNSWSH
SERVICE CHANGE NOTICE 11-27
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
1110 AM EDT Tue Jul 26 2011
TO: Subscribers:
-Family of Services
-NOAA Weather Wire Service
-Emergency Managers Weather Information Network
-NOAAPORT
Other NWS partners and NWS employees
FROM: James E. Hoke
Director Hydrometeorological Prediction Center
SUBJECT: Enhancements to Hydrometeorological Prediction Center
Medium Range Weather Grids over CONUS Effective
October 11 2011
Effective Tuesday, October 11, 2011, the National Centers
for Environmental Predictions (NCEP) Hydrometeorological
Prediction Center (HPC) will distribute enhanced CONUS medium
range (days 4 through 7) weather grids. The grids have been
enhanced to better align with National Digital Forecast Database
(NDFD) requirements.
In particular the weather grid temporal resolution has been
increased to 6 hours from 12 hours, additional qualifiers
(slight chance, chance) have been added, and the weather type
algorithm has been improved to better take into account vertical
temperature profiles. No weather is shown where the Probability
of Precipitation (PoP) is less than 15%.
Graphical representations of the products are online at:
http://origin.hpc.ncep.noaa.gov/5km_grids/5km_gridsbody.html
More details are online at:
http://origin.hpc.ncep.noaa.gov/5km_grids/medr_5km_methodology_n
ewparms.pdf
If you have questions or feedback, please contact:
Ed Danaher
edwin.danaher@xxxxxxxx
301-763-8000 Ext 7354
National Service Change Notices are online at:
http://www.weather.gov/os/notif.htm
$$
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