CWOP Information for KW2DX (AV270) in Clinton, IA, US

The following information is known about KW2DX. If you think that any information is incorrect, then please follow the instructions for correcting that data item.

It is possible that this page will report a problem where no problem exists. If you believe that this has happened, then please contact me (address at the bottom of this page) and explain clearly why you think this page is in error. Note that any changes that you make may take a few days to show up here, so please give it a week before commenting.

Location Map: If this message persists, then your browser is not compatible with Google Maps.
  Larger  Smaller  Google Earth.

Registered Location

Latitude: 41° 53' 22" N (deg min sec), 41.8895° (decimal), 4153.37N (LORAN)
Longitude: 90° 11' 13" W (deg min sec), -90.1868° (decimal), 09011.21W (LORAN)
Elevation: 220 metres (722 feet) -- validated against 223 metres (731 feet) from Google
Location: Clinton, IA, US
County: Clinton, IA
Forecast Office: Quad Cities (DVN)
Weather station Manager/Operator: John
Station type/software: Davis Vantage Pro 2/Vue with Weatherlink-IP

The site location should be at the mark shown -- or very close. Clicking within the map area (or you can drag the 'KW2DX' marker) will display the latitude/longitude of that point.

If the displayed location (or elevation) of the weather observing location is incorrect, please drag the marker to the right location (or click in the right location), and then send the updated information. Please note that we are trying to spot either the Stevenson Screen (or equivalent) or the location where the barometric readings are taken.

NOTE: The Registered Location is the location that the station owner provided when they signed up with CWOP. Show location history.

There are no photographs of the station. If you are the site operator and have pictures of this location, then please email them to

You can try to find photographs from the area surrounding the site marker by clicking on Find nearby photographs.

Data Status

Over the last 28 days, no data was seen on the following dates: 2019-07-04 to 2019-07-16.

A reasonably recent weather report (15 days ago) received from this station was

The last 24 hours of weather data can be viewed at Findu. This page also provides access to the raw APRS packets and various other APRS related tools.

Recent observations from this weather station can be downloaded as a CSV file suitable for importing into various spreadsheet programs: last 7 days, last 14 days, last 28 days, last 56 days. This data can also be linked directly from Excel using a Web Query. The main link goes to the page with the data on it, and the IQY link is the Web Query that will access it: last 7 days (IQY: last 7 days), last 14 days (IQY: last 14 days), last 28 days (IQY: last 28 days), last 56 days (IQY: last 56 days).

All the means and standard deviations shown below are from the last 28 days. Change analysis period to Last 3 days  Last 7 days  Last 14 days  Last 8 weeks  Last 13 weeks  Last 26 weeks  Last 39 weeks  Last 52 weeks  


Average barometer error: 1.1 milliBars
Error standard deviation: 0.5 milliBars

MADIS rating 98% QC OK

Latest daily graph:

Latest daily graph

These values are within range, so your sensor is probably calibrated correctly.


  24 hours  Day time  Night time
Average temperature error-0.4 °F0.3 °F-1.6 °F
Error standard deviation1.8 °F1.9 °F1.2 °F

NOTE: If the error above is POSITIVE, then it means that the analysis temperature is HIGHER than the reported temperature. This means that your sensor is reading COLDER than expected.

MADIS rating 99% QC OK

Latest daily graph:

Latest daily graph

These values are within the acceptable range. This probably means that your sensor is sited correctly and is calibrated correctly.

Dewpoint -- or switch to Relative Humidity

  24 hours  Day time  Night time
Average dewpoint error3.1 °F1.1 °F7.1 °F
Error standard deviation5.2 °F2.6 °F6.9 °F
Worst average dewpoint error5.8 °F2.1 °F14.2 °F
Worst standard deviation8.1 °F3.3 °F8.6 °F

NOTE: If the error above is POSITIVE, then it means that the analysis temperature is HIGHER than the reported temperature. This means that your sensor is reading COLDER than expected.

  Mean error (3.1) is too large
MADIS rating 84% QC OK

Latest daily graph:

Latest daily graph

Your readings are not within an acceptable error range. The automated problem analysis cannot identify the problem. You can signup on the wxqc mailing list and post information about this situation there. This is may be caused by poor siting of the sensor (e.g. under eves, in screen porch, or in thick tree coverage). For information on siting, see CWOP Station Guide.

Wind Vector

The wind vector is the average wind over the relevant period. Note that if the wind blows North for half the time at 2 knots, and then blows South for the other half of the time at 2 knots, then the result is zero -- i.e. North wind and South wind will cancel out. Over time, the direction of the wind and of the analysis should match pretty well. If the lengths of the vector are different, then it could mean either that your anemometer reads high or low, or that you are in a more shielded or more open space.
MADIS rating 99% QC OK
TodayLast 7 days
Wind vector chartWind vector chart for last 7 days

Neighboring Stations

This is a list of stations that are close to this station. Note that this is not the list of stations that are used in the data analysis. That list of stations is known only to MADIS. You can see all the stations at MADIS Data Display. Your station should be in the middle of the display. If you think that the analysis is incorrect, then maybe one of the close stations has failed.

You can look at those for comparison purposes. The average difference between your station and each station below is listed as well. This may allow you to detect local stations which are erroneous. You can also use these numbers to adjust your instruments -- especially if a number of ASOS stations have similar differences to your station. Also, try increasing the analysis period to more than the default 28 days. The difference is only given if both stations report reasonably often during each day. Some stations only report every 6 hours, and this makes the average of less interest. In this case, the average is not displayed. The values reported are the differences between this station and the neighboring station. I.e. if the difference is positive, then this station is reading higher than the neighboring station. Since this station has not been reporting continuously during the analysis period (it missed 13 days out of 28), the offsets below may not be accurate.

You can also subscribe to an RSS feed to tell you when new stations come online in this area. Choose either within 100 miles or 250 miles . For stations covered by your Forecast Office: Quad Cities (DVN) .

AN8241.1 milesSoutheast Clinton, Rainbow Park, IA, United States of America (lat 41.8750°, long -90.1775°, altitude 214 metres) -5.5mb-0.8°F
KCWI8.6 milesSouthwest Clinton, Clinton Municipal Airport, IA, United States (lat 41.8295°, long -90.3328°, altitude 216 metres) -1.5mb0.6°F-3.3°F
KSFY11.5 milesNorth Savanna, Tri-Township Airport, IL, United States (lat 42.0454°, long -90.1101°, altitude 188 metres) -1.3mb2.4°F-1.7°F
EW196111.7 milesSoutheast Morrison, IL, US (lat 41.8184°, long -89.9804°, altitude 199 metres) -0.0mb1.2°F-4.2°F
CW021617.5 milesNortheast Mt. Carroll, IL, US (lat 42.0916°, long -89.9818°, altitude 225 metres) -0.5mb-1.0°F-3.6°F
DW489526.8 milesEast Sterling, IL, US (lat 41.8239°, long -89.6738°, altitude 217 metres) 1.5mb0.3°F-4.5°F
KDVN28.4 milesSouthwest DAVENPORT MUNICIPAL AIRPORT, IA, United States (lat 41.6134°, long -90.5948°, altitude 229 metres) -1.8mb-0.0°F-1.2°F
KSQI28.7 milesEast Sterling Rockfalls, IL, United States (lat 41.7432°, long -89.6655°, altitude 197 metres) -1.3mb0.4°F-3.8°F
DW339630.1 milesSouthwest Davenport, IA, US (lat 41.5922°, long -90.6137°, altitude 213 metres) 0.6mb0.2°F-3.6°F
DW564034.5 milesEast Dixon, IL, US (lat 41.8625°, long -89.5172°, altitude 243 metres) -1.2mb0.3°F-2.8°F

The sites marked above thus did not report continuously during the analysis period, so the offsets may (probably will) not be accurate.

Quality Control Notes

This page reports on the quality control checks performed by MADIS. The green check mark and red cross are chosen based on the average performance during the analysis period (which is selectable above). The red cross can appear even if MADIS reports that all observations pass the MADIS QC checks.

The 'MADIS rating' reports on the percentage of observations that pass the MADIS checks. You should aim for two thumbs up!

Location Formats

The location is shown in three different formats. Each of these is used in some software, and is shown on some websites.

Degrees Minutes Seconds: VWS/VWSAPRS, WeatherLink 5.5, WeatherLink (5.2-5.4), WeatherView (Linux)

Decimal degrees: FreeWX, WeatherView32 (PC application)

LORAN: WeatherDisplay, WUHU, Henriksen WServer


CWOP Home: This describes the whole CWOP program and has a large amount of useful information.

CWOP Siting Guide (PDF): This is a guide to siting and operating a CWOP station. This is a must-read document.

Another CWOP Guide (PDF): This is another guide to siting and operating a CWOP station. This is a must-read document.

Urban Siting and Operations (PDF): This is a guide to siting and operating a CWOP station in an urban environment.

APRS WX Message format: This describes the actual format of the messages transmitted that carry WX information.

WXQC Mailing List: This is a mailing list where data quality issues are discussed. Assistance with software configuration can often be found here.

Topo Map Reading Guide: How to read USGS topographic maps, with a good section on reading contours.

Geographically nearby web pages: Use Geourl to find web pages that deal with locations geographically close to this site.

Overall website comments, problems etc to Philip Gladstone
Page layout last modified Sunday, 28 February 2016
Questions for this weather station owner/operator to John
This page is one of 91796 similar pages. This one was generated in 0.13 seconds.