The Iowa Environmental Mesonet (IEM) collects environmental data from cooperating members with observing networks. The data are stored and made available on this website.
Humidity Switch Turned On
Posted: 17 Jul 2018 05:35 AM, Views: 342
The featured chart displays daily averaged surface mixing ratio for Ames. This value is an absolute measure of humidity that is more linear in nature than dew point and is not directly temperature dependent like relative humidity. The top panel shows this year's values along with the range of values from previous years. The bottom panel shows the daily departures from period of record averages. The departures for this year show a remarkable switch near 1 May from dry to humid conditions. It is almost like a switch was thrown and the elevated humidity has dominated since. Thankfully, a respite has arrived for Tuesday with comfortable dew point temperatures.
Previous Years' Features
Data from the Iowa State Soil Moisture Network is found on this website and daily soil temperature averages are used to produce the highlighted analysis.
Besides point observations of precipitation, the IEM also processes gridded rainfall products made available by NOAA. This information is archived and made available in GIS ready formats.
The IEM combines data from participating networks into products like maps shown above and web applications to analyze the data.