USGS Water-Year Summary for Site 433241092254601

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	Available Parameters
	00020 Temperature, air(Max.,Mean,Med.,Min.)
	00036 Wind direction(Max.,Mean,Med.,Min.)
	00045 Precipitation(Max.,Sum) [not accurate when freezing]
	00052 Relative humidity(Mean,Max.,Med.,Min.)
	62625 Wind speed(Max.,Mean,Med.,Min.)
	72269 Wind gust speed(Min.,Max.,Mean,Med.)
	99986 Solar Radiation, ave(Max.,Mean,Med.,Min.)

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Water year 2025: 2025-10-01 to 2026-09-30

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USGS Water-Year Summary 2025

433241092254601 SSWS South Site Weather Station

LOCATION - Lat 43°32'41.81", long 92°25'46.14" referenced to North American Datum of 1983, in SW 1/4 SE 1/4 sec.18, T.101 N., R.13 W., Fillmore County, MN, Hydrologic Unit 07060002,

The weather station is currently at located (18 August 2017 at 11:50 CDT to the present) approximately 4.25 miles NE of LeRoy, MN. The weather station is located in the northern ditch near a culvert and telephone pole along 130th St. Also located along the southern perimeter of an agricultural field, aka: South Site Drained Site. The weather station is located approximately 0.75 miles east of the intersection of 130th street and Mower/Fillmore County Line Road.

The weather station is was at located (25 August 2016 at 12:45 CDT to 18 August 2017 at 09:45 CDT) approximately 4.4 miles NE of LeRoy, MN. The weather station was located in the front yard of the Don Anderson's home at 13073 Co Rd 109, Le Roy, MN 55951. Also located along the western side 111th Ave (County Rd. 109). During this time, the weather station was located closer to the South Site Undrained Site. The weather station was located approximately 350 ft. NNW of the intersection of 130th street and 111th Ave (County Rd. 109).

SURFACE-WATER RECORDS

GAGE - Continuous air temperature, relative humidity, wind speed, wind gust speed, wind direction, solar radiation, and battery voltage are measured with a HOBO U30-NRC weather station. These data are recorded quarter-hourly from 25 August 2016 at 12:45 CDT to the present by the HOBO U30-NRC weather station, which has a data logger built into it. The data logger is housed inside the weather-proof PVC shelter. The weather station gage is powered by a 3 watt solar panel and rechargeable station battery that is inside of the weather-proof PVC shelter. Data is downloaded manually and no telemetry or phone line is wired into the weather station gage.

An unheated Onset RG3 tipping-bucket rain gage was deployed at the site on 13 September 2016 at 15:30 CDT to 31 October 2018 at 13:15 CDT. The rain gage is mounted on a green T-post, located approximately 20 ft. west of the HOBO U30-NRC weather station, in the center of the buffer strip and ditch. The rain gage has a built-in datalogger, which measures and records precipitation quarter-hourly. Rain gage is nominally accurate to 0.01 inches.

The rain gage was removed from the site on 31 Oct. 2018 at 13:15 CDT. The weather station was discontinued at the site on 30 Oct. 2018 at 13:30 CDT. Data collection for the Impacts on Drainage Recharge study have concluded and all data logging equipment have been removed from the site.

COOPERATION - This site was operated (2016-2018) by the U.S. Geological Survey as a monitoring piezometer for the Southeast Minnesota Subsurface Drainage Impacts on Groundwater Recharge study. The piezometer began to be used as part of the Southeast Minnesota Subsurface Drainage Impacts on Groundwater Recharge study during 25 Aug. 2016 to 31 Oct. 2018. The GW Drainage Recharge study is a collaborative effort between the Environment and Natural Resources Trust Fund (via Legislative-Citizen Commission on Minnesota Resources (LCCMR)) and the U.S. Geological Survey.

CLIMATOLOGICAL RECORDS

PERIOD OF RECORD -

Air temperature, relative humidity, wind speed, wind gust speed, wind direction, and solar radiation were recorded quarter-hourly during 25 August 2016 at 12:45 CDT to 31 October 2018 at 13:30 CDT. Precipitation were recorded quarter-hourly during 13 September 2016 at 15:30 CDT to 31 October 2018 at 13:15 CDT. All data recorded quarter-hourly, except during the following periods:

Precipitation:

11 Apr. 2017 at 11:45-12:45 CDT: deleted rainfall due to rain gage calibration during this period.

17 Aug. 2017 at 10:00 CDT & 11:30-11:45 CDT: deleted false tips due to re-location of rain gage during this period.

09 Apr. 2018 at 12:45-13:45 CDT: deleted rainfall due to rain gage calibration during this period.

Relative humidity:

28 Aug. 2018 at 14:00 CDT - 07 Oct. 2018 at 20:15 CDT: due to unknown sensor issue during this period.

Air temperature:

28 Aug. 2018 at 14:00 CDT - 07 Oct. 2018 at 20:15 CDT: due to unknown sensor issue during this period.

Wind speed:

01 Jan. 2017 at 14:15 CST - 10 Jan. 2017 at 06:00 CST: deleted data due to frozen anemometer cups.

19 Feb. 2018 at 20:30 CST - 24 Feb. 2018 at 12:45 CST: deleted data due to frozen anemometer cups.

24 Feb. 2018 at 18:00 CST - 25 Feb. 2018 at 12:30 CST: deleted data due to frozen anemometer cups.

Wind gust speed:

02 Jan. 2017 at 18:15 CST - 10 Jan. 2017 at 05:15 CST: deleted data due to frozen anemometer cups.

19 Feb. 2018 at 20:45 CST - 24 Feb. 2018 at 12:30 CST: deleted data due to frozen anemometer cups.

24 Feb. 2018 at 18:00 CST - 25 Feb. 2018 at 12:30 CST: deleted data due to frozen anemometer cups.

Wind direction:

02 Jan. 2017 at 18:00 CST - 03 Jan. 2017 at 14:15 CST: deleted data due to frozen wind vain.

06 Jan. 2017 at 17:00 CST - 07 Jan. 2017 at 08:00 CST: deleted data due to frozen wind vain.

19 Feb. 2018 at 18:45 CST - 26 Feb. 2018 at 09:15 CST: deleted data due to frozen wind vain.

Solar radiation:

28 Aug. 2018 at 14:00 CDT - 31 Oct. 2018 at 13:30 CDT: due to unknown sensor issue during this period.

INSTRUMENTATION - A HOBO U30-NRC weather station was installed at the site on 25 August 2016 at 12:45 CDT. The weather station is mounted on an aluminum tripod, which has several horizontal and vertical arms that are used to mount several meteorological instruments. The weather station is located approximately 20 ft. east of the Onset RG3 rain gage. The weather station has a built-in data logger, which measures and records relative humidity, solar radiation, air temperature, wind gust speed, wind direction, wind speed, and battery voltage quarter-hourly.

A 2-bit temperature/relative humidity smart sensor S-THB-M002 was installed at the site on 25 August 2016 at 12:45 CDT. A solar radiation shield RS3-B is mounted around the temperature/relative humidity smart sensor. The temperature/relative humidity smart sensor is mounted on the HOBO U30-NRC weather station's aluminum tripod mast. The temperature/relative humidity smart sensor is wired into the HOBO U30-NRC datalogger, which measures and records quarter-hourly.

A solar radiation (silicon pyranometer) smart sensor S-LIB-M003 was installed at the site on 25 August 2016 at 12:45 CDT. The solar radiation smart sensor is mounted on the HOBO U30-NRC weather station's aluminum tripod mast. The solar radiation smart sensor is wired into the HOBO U30-NRC datalogger, which measures and records quarter-hourly.

A wind speed smart sensor S-WSB-M003 was installed at the site on 25 August 2016 at 12:45 CDT. The wind speed smart sensor is mounted on the HOBO U30-NRC weather station's aluminum tripod mast. The wind speed smart sensor is wired into the HOBO U30-NRC datalogger, which measures and records quarter-hourly.

A wind direction smart sensor S-WDA-M003 was installed at the site on 25 August 2016 at 12:45 CDT. The wind direction smart sensor is mounted on the HOBO U30-NRC weather station's aluminum tripod mast. The wind direction smart sensor is wired into the HOBO U30-NRC datalogger, which measures and records quarter-hourly.

An unheated Onset RG3 tipping-bucket rain gage was installed at the site on 13 September 2016 at 15:30 CDT. The rain gage is mounted on a green T-post, located approximately 20 ft. west of the HOBO weather station. The rain gage has a built-in data logger, which measures and records precipitation quarter-hourly. Rain gage is nominally accurate to 0.01 inches.

REMARKS - Relative humidity, solar radiation, air temperature, wind speed, wind gust speed, and wind direction data sets were all checked against a nearby weather station at "North Site Weather Station" (USGS 433531092263902), which was located 3.3 miles NNW of this weather station. Data sets were checked for anomalies such a spikes or non-changing data values. Any anomalies were removed from the data sets during the work/review data processing procedures.