A New Precipitation, Temperature, and Snow Depth Archive

The National Weather Service in Louisville is happy to announce a new on-line archive of daily precipitation, maximum and minimum temperature, and snow depths for many stations in Kentucky and southern Indiana. The data shows accumulation or current values at 7 AM. The data sources are varied: airport, Kentucky Mesonet, cooperative, CoCoRaHS, satellite, IFLOWS, and MSD precipitation. Below is a screenshot of what the page looks like:

Precipitation data is in two forms; KML format which can be downloaded, or PNG format. All other data is in KML format. To find out details about a particular point, simply click on the point and a box with more information will pop up. Clicking on the large thumbnails at the bottom will cause the images to enlarge. The archive goes back to 2015 for now and may extend back to 2014 soon. However, there are some dates which are not available.

One thing to note is that precipitation and temperature data are for a 24 hour period ending in the morning. Thus, there might be a day shift when comparing this data to calendar day data. For example, if heavy rain fell at an airport in the afternoon of the 10th, the calendar day records would record the rain on the 10th, but this archive would show it on the 11th. Snow Depth data is also the observed depth seen that morning. The reason for this is that calendar day data is not available for cooperative or CoCoRaHS stations.

The National Weather Service in Louisville hopes you find this archive useful. Do you want your location to appear on these maps? Join CoCoRaHS and see your data displayed!