Click Home and enter a new location, or click Cards Home.

Click the Historical Weather Data card.

Select a station on the map and view the graphs.

Click the About button for explanations and tips on panning and zooming the display. Pan to the left to display several years of data.

Look for periods when daily temperatures were well above or well below the long term average. If you suspect you've found a multi-day cold snap or heat wave, you may want to note the date and search local news sites or past weather sites to identify the event.

In the precipitation graphs, you can identify dates when relatively large amounts of rain or snow fell by the steep, vertical portions of the blue area. You may find this pattern in locations that have experienced landfalling tropical storms or hurricanes.

Periods where the blue fill doesn't reach the black line of the precipitation graph were drier than normal. You may want to check the drought status of the location for the dates you found in the U.S. Drought Monitor.