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North American Drought Monitor
Percent of Long-Term Average Precipitation
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Canada is not included in the contour maps because of the limited number
of climatological stations currently available. Until sufficient data
are made available to increase the station density so that contours can
be more accurately drawn, Canadian data will be provided only on the dot
maps.
 Overview
The Percentage of Long-Term Average Precipitation is a viable indicator of drought conditions. Long-term average precipitation for station or climatic division has been calculated over a 1951 to 2001 base period. The following maps show the percentage of these averages that has fallen in periods ranging from the past month to the past five years.
North American 1-Month Percent of Average Precipitation Dot Map
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US and Mexico 1-Month Percent of Average Precipitation Contours
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North American 2-Month Percent of Average Precipitation Dot Map
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US and Mexico 2-Month Percent of Average Precipitation Contours
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North American 3-Month Percent of Average Precipitation Dot Map
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US and Mexico 3-Month Percent of Average Precipitation Contours
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North American 6-Month Percent of Average Precipitation Dot Map
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US and Mexico 6-Month Percent of Average Precipitation Contours
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North American 12-Month Percent of Average Precipitation Dot Map
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US and Mexico 12-Month Percent of Average Precipitation Contours
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North American 24-Month Percent of Average Precipitation Dot Map
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US and Mexico 24-Month Percent of Average Precipitation Contours
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North American 36-Month Percent of Average Precipitation Dot Map
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US and Mexico 36-Month Percent of Average Precipitation Contours
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North American 48-Month Percent of Average Precipitation Dot Map
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US and Mexico 48-Month Percent of Average Precipitation Contours
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North American 60-Month Percent of Average Precipitation Dot Map
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US and Mexico 60-Month Percent of Average Precipitation Contours
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For further information on the data presented here, contact:
David levinson
NOAA/National Climatic Data Center
151 Patton Avenue
Asheville, NC 28801-5001
fax: 828-271-4328
email: David.Levinson@noaa.gov
-or-
Richard Heim
NOAA/National Climatic Data Center
151 Patton Avenue
Asheville, NC 28801-5001
fax: 828-271-4328
email: Richard.Heim@noaa.gov
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