Volunteer Weather Observers around Wisconsin

UW Soil Science Agricultural Weather/Modeling

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Introduction

These weather data are maximum and minimum air temperature and precipitation, for the previous 24 hours, observed at about 7 am. The observations are made by a group of about 60 volunteers, who immediately transmit them to the National Weather Service Forecast Office in Sullivan, WI. Meteorologists there collect the readings and make them available on the Weather Service's computer system. We retrieve the data from McIDAS, a system created and maintained by the Space Science and Engineering Center of the University of Wisconsin-Madison. Until December 2003, the reports were referred to by the NWS as "OPU", for "Other Public Products"; they are now officially "HYD", for "hydrometeorological data".

Some of the observers providing these measurements are part of the National Weather Service's Cooperative Observation Program, and their data will be included in long-term records. Other observers are not official members of the Cooperative Program, and use their own equipment. Thus, averages published in the "Climate of Wisconsin" (about 8 months from now) may not agree with those derived from the daily summaries here.

Go to today's data (hint: bookmark that location when you get there)

Go to...(last year): Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Go to...(this year): Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Retrieve data for previous years (HYD, OPU, and OPUMKE)

Sun Mon Tue Wed Thu Fri Sat
30 31 2013
Jan 1
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6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30 31 Feb 1 2
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24 25 26 27 28 Mar 1 2
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31 Apr 1 2 3 4 5 6
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26 27 28 29 30 31 Jun 1
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30 2013
Jul 1
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29 30 Oct 1 2 3 4 5
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27 28 29 30 31 Nov 1 2
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26 27 28 29 30 31 Feb 1
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23 24 25 26 27 28 Mar 1
2 3 4 5 6 7 8
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30 31 Apr 1 2 3 4 5
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29 30 2014
Jul 1
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26 27 28 29 30 31 Nov 1
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30 Dec 1 2 3 4 5 6
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2015
Jan 1
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Return to HYD Home Page

Data From Previous Years

HYD and OPU reports Max and min. temperatures
and precipitation
OPUMKE reports Precipitation only, including
snow depth when applicable