The EROS Data Center of the U.S. Geological Survey computes the U.S. Rain Days/Dry Days Product Suite every week, based on data from the National Oceanic and Atmospheric Administration’s (NOAA) National Weather Service (NWS).
The maps are based on a new, experimental NWS product, Precipitation Analysis, which combines observed data (i.e., data collected with rain gauges and other equipment on the ground) with radar and satellite data. This technique allows researchers to produce credible estimates of precipitation even in areas where there is no data from the ground-level. Thus, precipitation for the entire area of the U.S. can be estimated. Previously, descriptions of precipitation were limited to records from collection points.
Number of Rain Days (past 30 days)
Number of Rain Days (past 7 days)
Max. Consecutive Dry Days (past 30 days)
Max. Consecutive Dry Days (past 7 days)
30 Day Total Rainfall
7 Day Total Rainfall
Number of Days Since a Rain Day (past 30 days)