The IEM and NWS have enjoyed a long standing partnership. This partnership has collected a number of awards including a 2002 NWA Award and 2007 NOAA Award. We also worked together on the IEMChat Project, which was later rolled into the present day NWSChat Project.

Automated Data Plotting is a very deep rabbit hole with hundreds of plotting options for many datasets of NWS interest.

Did you see an image posted to social media with the IEM logo on it?
Daryl posts some interesting graphics to his Twitter @akrherz page. Generally, these are one-off images that are not available for dynamic generation on this website.

Interest Areas

Flash Flooding / Hydrology

Precipitation Estimates/Observations

Flood Warnings/Forecasts
Many of the apps in the "Severe Weather / VTEC" section are useful as well.

Severe Weather / VTEC

The Severe Weather Mainpage has more options listed.

Data / Realtime Monitoring

  • GIS Shapefiles
    of archived Storm Based Warning polygons.
  • IEMBot
    Realtime chatrooms, twitter posting service, RSS feeds and more.

Special Weather Statements (SPS)

Maps and Graphics

Statistics / Metadata


NWS Processed Datasets


Iowa RTP First Guess

The IEM attempts to get the temperature and precipitation logic correct to build the required SHEF fields for the RTP product.

Cooperative Observer Program - COOP
Local Storm Reports (LSR)

The IEM processes LSRs issued by the NWS in real-time. A number of applications on this website utilize this source of reports.

Storm Prediction Center Products
Numerical Model Data
Text Product Archives