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U.S. Department of Commerce logo and link to site Climate of 2003 - January
U.S. Drought Indicators

National Climatic Data Center, 13 February 2003

NOAA logo and link to site
Global Analysis / Global Hazards / United States / U.S. Regional Drought / U.S. Drought Indicators / Extremes
Use these links to access detailed analyses of Global and U.S. data.

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The data presented in this drought report are preliminary. Ranks, anomalies, and percent areas may change as more complete data are received and processed.
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Several climate indicators are used to monitor drought in the United States. These indicators include:

  • the Palmer Z Index, Palmer Drought Severity Index, and Palmer Hydrological Drought Index

    Palmer Z Index
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    Palmer Hydrological Drought Index
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  • the one-month, two-month, three-month, six-month, nine-month, 12-month, and 24-month Standardized Precipitation Index

    1-month Standardized Precipitation Index
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    3-month Standardized Precipitation Index
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    12-month Standardized Precipitation Index
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    24-month Standardized Precipitation Index
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  • maps showing the percent of normal precipitation for airport stations for the current month and year-to-date

    Percent of Normal Precipitation for current month
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    Percent of Normal Precipitation for year-to-date
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  • the statewide precipitation ranks for current month (short-term) and 3-months, 6-months, and 12 months (longer-term)
    Statewide Precipitation Ranks for January 2003
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    Statewide Precipitation Ranks for November 2002-January 2003
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  • the short-term surface wetness anomaly map computed by the National Climatic Data Center from the Special Sensor Microwave Imager (SSMI), a polar orbiting satellite with global coverage
    Satellite-based North America surface wetness anomalies
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    The surface wetness anomaly map shows areas of above and below average liquid precipitation wetness. During the winter months, it should be used in conjunction with the snow cover anomaly map.
    Satellite-based North America snow cover anomalies
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    The snow cover anomaly map shows areas of above and below average frozen precipitation "wetness". An area with above-average snow cover may appear to have below-average liquid wetness.

    Satellite-based Alaska surface wetness anomalies
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    The surface wetness anomaly map shows areas of above and below average liquid precipitation wetness. During the winter months, it should be used in conjunction with the snow cover anomaly map.
    Satellite-based Alaska snow cover anomalies
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    The snow cover anomaly map shows areas of above and below average frozen precipitation "wetness". An area with above-average snow cover may appear to have below-average liquid wetness.

  • modeled runoff, evaporation, and soil moisture conditions as calculated by the National Weather Service
    NWS modeled soil moisture anomalies
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    NWS modeled runoff anomalies
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  • the percent of average precipitation map for the water year to date for the SNOTEL stations in the western mountains provided by the USDA Water and Climate Center

    USDA-WCC SNOTEL station percent of average precipitation - color coded
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    USDA-WCC SNOTEL station percent of average precipitation - numeric values
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  • the percent of average snow water content map for the SNOTEL stations in the western mountains provided by the USDA Water and Climate Center

    USDA-WCC SNOTEL station percent of average snow water equivalent - color coded
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    USDA-WCC SNOTEL station percent of average snow water equivalent - numeric values
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  • the USGS January daily streamflow maps
  • Top of Page For all climate questions other than questions concerning this report, please contact the National Climatic Data Center's Climate Services Division:

    Climate Services Division
    NOAA/National Climatic Data Center
    151 Patton Avenue
    Asheville, NC 28801-5001
    fax: 828-271-4876
    phone: 828-271-4800
    email: ncdc.info@noaa.gov
    For further information on the historical climate perspective presented in this report, contact:

    Richard Heim
    NOAA/National Climatic Data Center
    151 Patton Avenue
    Asheville, NC 28801-5001
    fax: 828-271-4328
    email: Richard.Heim@noaa.gov
    -or-
    Jay Lawrimore
    NOAA/National Climatic Data Center
    151 Patton Avenue
    Asheville, NC 28801-5001
    fax: 828-271-4328
    email: Jay.Lawrimore@noaa.gov
    Top of Page
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    Last Updated Friday, 18-Nov-2005 14:11:55 EST by Richard.Heim@noaa.gov
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