gov.noaa.nws.ohd.hdsc: OHD-HDSC-NOAAAtlas14V5v2011-PI-as NOAA/NWS/Office of Hydrologic Development, Hydrometeorological Design Studies Center 20091218 raster digital data NOAA Atlas 14 Volume 5 Silver Spring, MD, USA NOAA/NWS/Office of Hydrologic Development, Hydrometeorological Design Studies Center http://hdsc.nws.noaa.gov/hdsc/pfds/pfds_gis.html http://hdsc.nws.noaa.gov/hdsc/pfds/ http://www.nws.noaa.gov/ohd/hdsc/index.html ftp://hdsc.nws.noaa.gov/pub/hdsc/data/ This GIS grid atlas contains precipitation frequency estimates for the Pacific Islands that are based on precipitation data. This atlas is a new release from the NWS and does not update any other publication. The precipitation frequency grids are available for durations from 5 minutes through 60 days, and for average recurrence intervals of 1 year through 1,000 years. AMS and PDS results are provided; refer to published documentation for differences between the two. Precipitation frequency estimates are used as basic design criteria for a wide variety of hydraulic structures such as culverts, roadway drainages, bridges and small dams. This dataset is for the display and/or analyses of spatially distributed point precipitation frequency estimates. none. 195504 200810 Climatological period from which the point precipitation observations were taken. Complete As needed -170.85076 -170.53576 -14.21579 -14.38079 NASA GCMD Science Keywords Atmosphere > Precipitation > Precipitation Frequency ISO 19115 Topic Category climatologyMeteorologyAtmosphere NASA GCMD Location Keywords Ocean > Pacific Ocean > Central Pacific Ocean > American Samoa NASA GCMD Location Keywords Vertical Location > Ground Layer 1 NASA GCMD Science Keywords Atmosphere > Precipitation > Precipitation Frequency n/a, no restrictions apply and data is public domain. Acknowledgement of NOAA/National Weather Service, Office of Hydrologic Development, Hydrometeorological Design Studies Center (HDSC) NOAA/National Weather Service, Office of Hydrologic Development, Hydrometeorological Design Studies Center mailing and physical address

NOAA/NWS/Office of Hydrologic Development

SSMC2, W/OHD 12

1325 East-West Highway

Silver Spring MD 20910 USA (301) 713-0640 (301) 713-0963 hdsc.questions@noaa.gov 9 a.m. to 5 p.m. Eastern, Monday-Friday http://hdsc.nws.noaa.gov/hdsc/pfds/meta/images/pi1_web_thumbnail.png PI 100-year 24-hour PNG None Unclassified No special instructions All attributes created during the creation process were tested for internal consistency. All data were based on precipitation-reporting stations that had at least 10 years of 15-minute, hourly and/or daily precipitation data. Similar quality assurance procedures were used with all input data sets. Observed point precipitation values originated from a variety of sources. Station data were subjected to quality control checks by the National Climatic Data Center (NCDC) or the U.S. Geological Survey (USGS) and the Hydrometeorological Design Studies Center. National Climatic Data Center (NCDC) 2009 tabular digital data DSI3240 None Asheville, NC, USA National Climatic Data Center (NCDC) http://lwf.ncdc.noaa.gov/oa/ncdc.html online 198402 200801 ground condition NCDC Climate Data Online -Precipitation Data, Hourly, http://gis.ncdc.noaa.gov/website/ims-cdo/preciphr/ Location and values of known hourly precipitation amounts. U.S. Geological Survey (USGS) 2008 tabular digital data USGS daily data None Honolulu, HI, USA USGS Pacific Islands Water Science Center http://hi.water.usgs.gov online 198910 200810 ground condition U.S. Geological Survey (USGS) Precipitation Data, Daily, http://hi.water.usgs.gov Location and values of known daily precipitation amounts. National Climatic Data Center (NCDC) 2009 tabular digital data DSI3260 None Asheville, NC, USA National Climatic Data Center (NCDC) http://lwf.ncdc.noaa.gov/oa/ncdc.html online 197905 200712 ground condition NCDC Climate Data Online -Precipitation Data, 15-minute, http://gis.ncdc.noaa.gov/website/ims-cdo/preciphr/ Location and values of known 15-minute precipitation amounts. National Climatic Data Center (NCDC) 2009 tabular digital data DSI3200, DSI3206 None Asheville, NC, USA National Climatic Data Center (NCDC) http://lwf.ncdc.noaa.gov/oa/ncdc.html online 195504 200805 ground condition NCDC Climate Data Online -Precipitation Data, Daily, http://gis.ncdc.noaa.gov/website/ims-cdo/preciphr/ Location and values of known daily precipitation amounts. This spatial data set was prepared by spatially interpolating point precipitation frequency estimates. The precipitation frequency estimates were calculated using regional L-moment frequency approach based on an annual maximum series data. Annual maximum series bases estimates were converted to partial duration based frequency estimates. The spatial interpolation of the point precipitation frequency estimates was accomplished by first interpolating 1-day MAMs. The 1-day MAM grids were used to derive MAM grids for other durations using relationships in MAM ratios across durations. The MAM grids were then used to derive grids of precipitation frequency estimates by rescaling with corresponding regional growth factors for each recurrence interval and duration. For more details about the processes used to create this grid, please see the NOAA Atlas 14 Volume 5 documentation. 200912 Raster integer Grid Cell 67 127 1 0.0025 0.0025 Decimal degrees WGS 84 WGS 84 6378135.000000 298.260000 precipitation frequency grid cell value ASCII integer Self-evident precipitation frequency grid cell value spatially gridded precipitation frequency estimates NWS/OHD/HDSC Sequential unique whole numbers that are automatically generated. Value Feature geometry. Grid cell precipitation in inches*1000 HDSC Coordinates defining the features. 0 9999999 1000ths of inches; -999 is missing 0.01 measurement accuracy of precipitation gauges in inches NOAA/National Weather Service, Office of Hydrologic Development, Hydrometeorological Design Studies Center HDSC Questions mailing and physical

1325 East-West Highway

Silver Spring MD 20910 301-713-0640 Downloadable data. Users must assume responsibility to determine the appropriate use of these data. ASCII 0.25 HDSC PFDS; a) for PDS-based estimates - asXyrYYaZ.ver3 (X = average recurrence interval; YY = duration; Z = null for precipitation frequency value, u for upper confidence limit, l for lower confidence limit); b) for AMS-based estimates - asXyrYYaZ_AMS.ver3 (X = 100/annual exceedance probability; YY = duration; Z = null for precipitation frequency value, u for upper confidence limit, l for lower confidence limit). none A grid-based GIS such as ArcInfo (GRID) or Arcview 3.x/8.x/9.x (with Spatial Analyst Extension). The grids can be viewed in other programs by manipulating the header. 20091217 NOAA/NWS/OHD/Hydrometeorological Design Studies Center mailing address

NOAA/NWS/Office of Hydrologic Development

SSMC2, W/OHD 12

1325 East-West Highway

Silver Spring MD 20910 USA (301) 713-0640 (301)713-0963 hdsc.questions@noaa.gov 9 a.m. to 5 p.m. Eastern, Monday-Friday FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-012-2002 local time