The Iowa Environmental Mesonet (IEM) collects environmental data from cooperating members with observing networks. The data are stored and made available on this website.
'17-'18 Winter Storm #1
Posted: 12 Dec 2017 07:55 AM, Views: 89
The IEM generates snowfall analysis maps based on NWS COOP observations, Local Storm Reports, and CoCoRaHS reports. The arbitrary requirement for classifying these events as storms is for somewhere in Iowa to receive 2+ inches of snow or to have significant impacts from ice and/or blowing snow. So far NE Iowa has some isolated totals of two inches, so we have our first "winter storm" of the season. There have been other light snow producers in the state this season, but only have seen an inch or less reported. Look for more maps like these as the season progresses and the "Winter Storms of 2017- 2018" link on the homepage will bring you to a page showing all these maps.
Previous Years' Features
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.