Public Information Statement
Issued by NWS National HQ

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NOUS41 KWBC 182110

Public Information Statement
National Weather Service Headquarters Washington DC
410 PM EST Thu Dec 18 2014

To:         Subscribers
            -Family of Services
            -NOAA Weather Wire Service
            -Emergency Managers Weather Information Network
            Other NWS Partners and Employees

From:       Deirdre Jones
            Acting Director, Office of Operational Systems

Subject:    Planned Silver Spring power outage and impacts to
            the National Weather Service system that enables
            users to view or download products and services via
            the web Saturday, December 20, 2014

On Saturday, December 20, 2014, there will be scheduled
maintenance to electrical equipment that, in part, supplies
power to the National Weather Service system that enables users
to view or download products and services via the web. This
proactive maintenance is expected to take 9 hours (approximately
from 7 am to 5 pm EST). Failure to proactively address this
issue would pose a significant risk to the safety of NOAA
personnel and could result in an unplanned outage lasting at
least 48 hours.

The National Weather Service has begun taking measures to reduce
or eliminate any potential affects during this time by
activating contingency plans and planning aggressive monitoring
of all systems while the maintenance is performed. Part of the
contingency plan involves switching to the established backup
server to provide products and service via the web. The public-
facing, local NWS office websites and individual
city forecast pages are not expected to be impacted.

The processing of model runs and their timing will also not be
affected; however, the dissemination services provided by, and systems hosted by the
NOAA Center for Weather and Climate Prediction, such as the
websites for National Operational Model Archive and Distribution
System (NOMADS), Model Analyses and Guidance (MAG) and for downloading data, and the public
websites for the Climate Prediction Center and Environmental
Modeling Center, may be slow.

All NWS systems, such as Advanced Weather Interactive Processing
System (AWIPS) at our forecast offices, will be operating
normally. There will be many critical dissemination systems that
wont be affected such as NOAAport/Satellite Broadcast Network,
the Emergency Management Weather Information Network (EMWIN)
satellite broadcast, NOAA Weather Wire Service (NWWS), NOAA
Weather Radio (NWR).  These systems do not rely on internet
connectivity to operate or deliver functions.
For more information, please contact:

Deirdre Jones

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