ASOS Network

Reports: Hourly
Stations: 15
The Automated Surface Observing System (ASOS) is considered to be the flagship automated observing network. Located at airports, the ASOS stations provide essential observations for the National Weather Service (NWS), the Federal Aviation Administration (FAA), and the Department of Defense (DOD). The primary function of the ASOS stations are to take minute-by-minute observations and generate basic weather reports.[1]

Observations from the ASOS network are nationally monitored for quality 24 hours per day. Depending on the trouble, maintenance can be performed on the same day.

Current ASOS Data:

1 Minute Archive:

The National Climatic Data Center collects a 1 minute interval archive from the ASOS network. This archive is available here, but in a terrible format! The IEM has done its best to process this data and will make it available here for Iowa sites.
Data is available for Des Moines, Waterloo, Dubuque, and Sioux City back to 2000. The rest of the sites since March 2005.

Quality Control:

Historical Data:


(The RUC2 is an operational forecast model run by the Weather Service.)

1 Adapted from the ASOS User's Guide