The Iowa Environmental Mesonet (IEM) collects environmental data from cooperating members with observing networks. The data are stored and made available on this website.

IEM Daily Feature

Rare Storm Motion

Posted: 22 Jun 2018 05:26 AM, Views: 582
Tags:   time...mot...loc   warnings   nws  
A pesky upper level low pressure system has been causing interesting weather these past few days. On Thursday, NWS Des Moines issued a number of Tornado Warnings for storms that were moving toward the northwest. Storms that move in that direction rarely get Tornado Warnings over Iowa. The featured chart displays a scatter plot and kernel density estimate for NWS Des Moines issued Tornado Warnings that include an analyzed storm motion. The red dots are from Wednesday's event and there is very little company for storms that have some westward moving component. The setup for storms moving in that direction to produce tornadoes is very rare in this part of the country. The chart shows the dominate storm motion of about 30 MPH from the WSW.
Rate Feature

Previous Years' Features
New Hampton US 18 , IA Webcam:
News Items  

Website Updates
Posted: 31 May 02:49 PM

New AWOS: Hampton (KHPT)
Posted: 04 May 10:00 AM

New Webcam: Marengo
Posted: 27 Apr 08:42 PM

December COOP Data Uploaded
Posted: 28 Mar 02:39 PM

November COOP Data Uploaded
Posted: 14 Feb 10:10 PM

Sign up for the Daily Bulletin

Current Website Performance:
Bandwidth: 7.3 MB/s
Requests/Second: 2,301

Soil Temperatures

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.

Download Precipitation for GIS »

Current Data

The IEM combines data from participating networks into products like maps shown above and web applications to analyze the data.

More current products »


ISU Agronomy
IIHR - University of Iowa