Where does this information come from?
RWIS - Roadway Weather Information System
These sensors are located in and along Iowa's
Interstate and primary roads. The RWIS network of sensors is designed to provide
Iowa Department of Transportation Maintenance employees the specific weather
information they need about the roadway.
With specific roadway-based weather information, better decisions and treatment strategies for snow and ice
control are possible. The information is also a valuable aid in summer
activities where weather can affect the timing and completion of projects such
as pavement patching, mowing, herbicide spraying, etc.
AWOS - Automated Weather Observing System
These sensors are part of the Iowa Aviation Weather
System and are located at airports across the state. This system was designed
and built primarily to assist pilots in assessing weather conditions.
These regional forecasts are excerpts from a winter
forecast received by the Iowa Department of Transportation from a private
contractor. The forecasts are used as a tool to plan the actions of the
Maintenance crews on Iowa's Interstate and primary highways when winter weather