CWOP Information for DW0610 (D0610) in Savennieres, FR

The following information is known about DW0610. 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.

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Registered Location

Latitude: 47° 23' 1" N (deg min sec), 47.3837° (decimal), 4723.02N (LORAN)
Longitude: 0° 39' 14" W (deg min sec), -0.6538° (decimal), 00039.23W (LORAN)
Elevation: 100 metres (328 feet)
Location: Savennieres, FR
Weather station Manager/Operator: Bruno
Station type/software: Davis Vantage Pro 2/Vue with Weatherlink-IP

The elevation does not correspond with the estimated elevation (23 metres (75 feet) -- source SRTM.C_1TO19_3) at that point. It seems probable that the elevation was entered as feet rather than as metres. Please use the 'send the updated information' link below to update the location or elevation.

The site location should be at the mark shown -- or very close. Clicking within the map area (or you can drag the 'DW0610' 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.

The best way to get elevation is to consult a topographic map. Make sure that you know whether the contours are marked in feet or metres. Note that handheld GPS receivers do not provide readings of elevation accurate to better than 10-20 metres (technical discussion). If you do not have access to a topographic map, then a GPS receiver is acceptable, but make sure that it is operating in 3D mode and let it average the position for at least five minutes.

For more information on reading maps, please see the Topo Map Reading Guide -- in particular it discusses how to read contours.

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.

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APRS Location

APRS Location recorded at 2017-Apr-23 01:08 UTC
Latitude: 47° 24' 0" N (deg min sec), 47.4000° (decimal), 4724.00N (LORAN)
Longitude: 0° 24' 0" E (deg min sec), 0.4000° (decimal), 00024.00E (LORAN)

The location reported in the weather reports (via APRS) is significantly different to the registered location above. In particular, the difference is about 49.4 miles. If you have changed your location (or software) since the time above, then this can be a false alarm. Check the location currently being reported at

Please check which location is correct. If the registered location is incorrect, then you can correct it by dragging the marker above and using the 'send the updated information link'. If the APRS location is incorrect, then you must enter the correct coordinates into your software which generates the weather report (APRS) messages. Note that the various different types of software take the location in different formats, so be sure to use the correct format when entering the latitude and longitude.

Data Status

Data has been seen on each of the last 26 analyzed days.

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  

The inconsistency noted above in your location information means that the analyzed readings for your location may be incorrect. For example, if your location is incorrect, then the analysis values will be for a location other than your station. This will give different analysis results, probably leading to errors being shown below. If the elevation is incorrect, then the comparison of temperature readings will be in error.

A recently received weather report from this station was

This report was seems to be a valid APRS record, but not a valid weather record.


Latest daily graph:

Latest daily graph

Neighboring Stations

This is a list of stations that are close to this station. 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.

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 .

LFRA6.8 milesNorth Angers, France (lat 47.4789°, long -0.6144°, altitude 58 metres) -3.3mb
LFJR20.1 milesNortheast Angers-Loire Airport, France (lat 47.5603°, long -0.3122°, altitude 59 metres) -2.1mb
LFOV45.0 milesNorth Laval-Entrammes Airport, R, France (lat 48.0314°, long -0.7430°, altitude 100 metres) -2.0mb
LFRS47.6 milesWest Nantes, France (lat 47.1500°, long -1.6088°, altitude 27 metres) -1.7mb
LFRM55.8 milesNortheast Le Mans, France (lat 47.9486°, long 0.2017°, altitude 52 metres) -2.1mb
LFRI58.2 milesSouthwest La Roche-Sur-Yon, France (lat 46.7019°, long -1.3786°, altitude 91 metres) -1.7mb
LFOT64.8 milesEast Tours, France (lat 47.4445°, long 0.7276°, altitude 108 metres) -1.6mb
LFRN69.1 milesNorthwest Rennes, France (lat 48.0689°, long -1.7339°, altitude 37 metres) -2.3mb
LFRZ70.9 milesWest St-Nazaire, France (lat 47.3119°, long -2.1635°, altitude 4 metres) -1.9mb
LFBI71.3 milesSoutheast Poitiers, France (lat 46.5877°, long 0.3067°, altitude 120 metres) -1.5mb

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 Bruno
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