National Weather Service Cooperative Observer Program (COOP)
The COOP network is generally comprised of volunteer observers reporting once-daily high and low air temperature, liquid precipitation, snow fall and snow depth. Here are some popular IEM COOP apps.
Sortable Currents Download Observations Locate Sites View Obs by Day/YearIEM Value-Added Climodat Dataset
The IEM takes these preliminary COOP reports, does some limited quality control, and attempts to estimate any missing data to provide a coherent dataset called "Climodat". Here are some popular IEM Climodat apps.
Climodat Reports Download Quality Controlled Locate Sites Growing Season PlotterRecent News Items
Most recent news items tagged: coop
- December COOP Data Uploaded
Posted: 28 Mar 2018 - November COOP Data Uploaded
Posted: 14 Feb 2018 - October COOP Data Uploaded
Posted: 11 Jan 2018 - September COOP Data Uploaded
Posted: 14 Dec 2017 - August COOP Data Uploaded
Posted: 28 Nov 2017
Data Plots
- Iowa Precipitation Contour
- Midwest Precipitation Contour
- Rainfall totals for this month
- Snowfall totals this morning
- Snowfall totals this month
- Snow depth this morning
- High + Low Temperatures this morning
Data + Summaries
- A GIS shapefile is generated daily with the most recent set of COOP observation in it.
- A Comma Delimited File of today's COOP observations.
- Today's Rainfall Reports
Rainfall reports valid for today along with today's climatology. - This Month's Totals
Rainfall totals for this month along with climatology. - This Year's Totals
Rainfall totals this year along with climatology.
Download Data
- Download Daily Oberservations
Pick your site, pick a time period, and download the data. - 2004- Observations
View all obs from 2004 to for one site or pick a date and view all sites! - ClimoDat Interface
Handy application to access summary COOP data. - Fisher Porter Rain Gauge Download
IEM processed data made available by NCEI for Iowa stations only. - Growing Season Plotter
Plot growing season totals since 1893 for a date span of your choice.
The resulting data is also available in a GIS Ready! format. - Daily Climate Normals
Download daily normal high and low temperatures and average rainfall.
Data Applications:
Winter Min Low Temp FrequenciesHistogram showing the number of years that a certain low temperature threshold is exceeded.
Yearly Average TemperaturesFor a date interval of your choice, get the yearly statewide average temperatures.
Daily Climate in MapsPlots of daily extremes and averages with a GIS Ready! download of the data presented.
Accumulated Precipitation ProbabilitiesChart of precip probabilities for a time period of your choice.
Yearly Departures from AveragePlot average temperatures versus what actually occured during one year.
Accumulated Departures from AveragePlot an accumulated departure from average for rainfall and growing degree days for a time period of your choice!