Tools & Interactives

Map containing two layers: one showing the hottest maximum temperature recorded at a station during the summer, and the other showing the week when that station's record was set.

Grab and drag the slider to compare the before and after images of an atmospheric river event in California in January 2017 that greatly increased mountain snowpack.

This map shows the earliest first day of snow recorded at thousands of locations in the U.S., based on Global Historical Climatology Network station data from NOAA NCEI.

Grab and drag the slider to compare the before and after images of heavy rains and floods in Houston, Texas after Hurricane Harvey in August 2017.

Grab and drag the slider to compare the warmest and coldest first days of summer recorded at thousands of U.S. locations.

Compare change in February average temperature between 1895-2016 to change in February average temperature between 1987-2016.

Web map of climate-related planting zones layers based on annual minimum temperatures from 1971-2000, 1981-2010, and the change between the two periods.

Web map of warmest first day of spring (March 19) recorded at thousands of U.S. weather stations, based on Global Historical Climatology Network data.