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

MOS Dew Point Forecasts

Posted: 19 Oct 2021 05:32 AM, Views: 18
The IEM curates a few forecast datasets including the Model Output Statistics (MOS) from a few models produced by the NWS. The MOS takes forecast output from the weather models and attempts to produce bias corrected time series forecasts for point observation locations typically at the airport weather stations. The featured chart presents a qualitative comparison of the MOS output for dew point temperature for Ames along with the actual observations. The bars represent the range of forecast values at the given valid time via the ensemble of previously issued MOS forecasts for that time. Since the MOS is run multiple times per day and has a forecast out a number of days, an individual forecast time will have a range of forecasts based on that time lagged ensemble. Anyway, that chart nicely shows the roller-coaster dew point temperatures have been on this month with only a modest increase over the next few days expected. You can generate plots like these via this website for other models and airport forecast locations of your choice!
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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.

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