The Iowa Environmental Mesonet (IEM) collects environmental data from cooperating members with observing networks. The data are stored and made available on this website.
Latest Warmest Stretch of the Year
Posted: 26 Sep 2017 05:34 AM, Views: 213
A cold front has swept the state clean of the summer like air mass that has dominated our weather for the recent few days. High temperatures during this period were remarkably warm with values in the low 90s for most. In fact, over the recent five day stretch, places like Cedar Rapids had its warmest five day stretch of the year. The featured chart presents the warmest such periods each year along with a histogram of the day of the year that participated. The period this year shows up the furthest to the right (latest in the year) and a descent separation from the previously latest in mid September. More early Fall like temperatures are back for the rest of the week.
Previous Years' Features
Current Eclipse Sky Coverage Forecast
Posted: 18 Aug 10:17 AM
April 2017 COOP Data Uploaded
Posted: 03 Aug 11:06 AM
March 2017 COOP Data Uploaded
Posted: 03 Aug 11:00 AM
17 July NWS Data Outage [resolved]
Posted: 17 Jul 11:55 AM
GIS Future RADAR from HRRR
Posted: 14 Jul 04:30 PM
The IEM processes National Weather Service NEXRAD information in real-time to produce and archive many products. This includes a generated composite produced every five minutes dating back to 1995!
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.