What are computer generated weather forecasters?

The atmosphere or, more importantly, the change in the atmosphere with time can be represented by mathematical equations. The equations that represent the atmosphere can be solved by computer models to predict the future state of the atmosphere. Atmospheric models are not perfect! They should be used by the forecaster to aid in making a forecast, not used as a statement of fact.

These maps display computer model forecasts of upper air and surface conditions from 12 hours to 10 days ahead based on the initial time. Models are run once every 12 hours (6 AM and 6 PM). Data is usually available 5-6 hours after the initial time.

Iowa State Model Forecast Maps

• 12-hour ETA 500 mb heights and vorticity
• 24-hour ETA 500 mb heights and vorticity
• 36-hour ETA 500 mb heights and vorticity
• 48-hour ETA 500 mb heights and vorticity
• 00-12-hour ETA forecast precip
• 12-24-hour ETA forecast precip
• 24-36-hour ETA forecast precip
• 36-48-hour ETA forecast precip

(back to forecast help page)