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/Year
IEM 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 Plotter
Recent 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
- 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 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.
Histogram showing the number of years that a certain low temperature threshold is exceeded.
Histogram showing daily high/low temperatures.
For a date interval of your choice, get the yearly statewide average temperatures.
View observations per station and per month basis.
Statistics of dates for significant first fall freezes.
For a given date, how long will the snow stick around?
Tables of daily temperature and precipitation climatology.
Plots of daily extremes and averages with a GIS Ready! download of the data presented.
Dynamically produced chart of average daily temperatures.
Plot average daily temperatures for a year of your choice.
Chart of precip probabilities for a time period of your choice.
Plot average temperatures and extremes throughout a year.
Plot average temperatures versus what actually occured during one year.
Plot an accumulated departure from average for rainfall and growing degree days for a time period of your choice!
Generate maps of daily observations.