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730 NOUS41 KWBC 181349 PNSWSH Public Information Notice, Comment Request: Amended National Weather Service Headquarters Washington DC 850 AM EST Tue Nov 18 2014 To: Subscribers: -Family of Services -NOAA Weather Wire Service -Emergency Managers Weather Information Network -NOAAPORT Other NWS Partners and NWS Employees FROM: Eli Jacks Chief, Fire and Public Weather Services Branch SUBJECT: Amended: Soliciting Comments through April 15, 2015, on an Experimental Scaled Predictive Ice Storm Aftermath Index at Select NWS Weather Forecast Offices Amended to add WFO Atlanta (FFC) to the list or participating WFOs and update PDD and WFO URLs. NWS is accepting comments through April 15, 2015, on an experimental Scaled Predictive Ice Storm Aftermath (SPIA) Index. http://www.nws.noaa.gov/survey/nws-survey.php?code=SPISA Select NWS Weather Forecast Offices (WFO) (Table 1) will produce web graphics depicting the potential impact of freezing rain and wind on exposed electrical systems to enhance their decision support services. Current NWS Ice Storm Warnings are issued based on forecast ice accumulation only, typically one quarter of an inch or greater. The combined effect of ice and wind, which more realistically describes damage potential, is not formally set as warning criteria. By using the SPIA scaled index, NWS should be able to provide a better understanding of ice storm impact potential to local, state, and federal response entities. The potential impacts are scaled from 0 to 5 and suggest potential electrical outage coverage and duration. Until now, the NWS has not attempted to routinely quantify the impact of ice storms. The use of this scaled index will allow the NWS to evaluate the potential of providing these specifics. For example, a level 5 ice storm would be defined as one causing catastrophic damage to entire exposed utility systems, including both distribution and transmission networks. Outages could last several weeks in some locations. Graphics showing forecast index values will be available as part of the routine forecast provided online for the following WFOs: Table 1: Participating WFOs and url: -------- --------------------------- WFO Atlanta (FFC) http://www.srh.noaa.gov/ffc/?n=ice_impact_index WFO Tulsa (TSA) http://www.srh.noaa.gov/tsa/?n=ice_impact_index WFO Little Rock (LZK) http://www.srh.noaa.gov/lzk/?n=ice_impact_index WFO Jackson (JAN) http://www.srh.noaa.gov/jan/?n=ice_impact_index WFO Nashville (OHX) http://www.srh.noaa.gov/ohx/?n=ice_impact_index WFO Memphis (MEG) http://www.srh.noaa.gov/meg/?n=ice_impact_index WFO Norman (OUN) http://www.srh.noaa.gov/oun/?n=ice_impact_index WFO Springfield (SGF) http://www.crh.noaa.gov/sgf/?n=ice_impact_index WFO Pleasant Hill (EAX) http://www.crh.noaa.gov/eax/?n=ice_impact_index WFO St. Louis (LSX) http://www.crh.noaa.gov/lsx/?n=ice_impact_index WFO Paducah (PAH) http://www.crh.noaa.gov/pah/?n=ice_impact_index More information regarding the SPIA index is online in a Product Description Document: http://products.weather.gov/PDD/PDD-SPIA_November2014.pdf During this comment period, a proactive effort will be made to educate users and partners of the product availability and use. At the end of the comment period, the NWS will make a decision on whether to transition the experimental SPIA Index to operational status. The experimental SPIA Index may also be considered for use at other WFOs and NWS Regions. For more information please contact: Steven Piltz Meteorologist-in-Charge NWS Tulsa, OK 74128 918-832-4115 email@example.com National Public Information Notices are online at: http://www.weather.gov/os/notif.htm $$