CWOP Information for DW4640 (D4640) in Belleville, IL, US

The following information is known about DW4640. 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: 43° 9' 52" N (deg min sec), 43.1645° (decimal), 4309.87N (LORAN)
Longitude: 70° 54' 19" W (deg min sec), -70.9053° (decimal), 07054.32W (LORAN)
Elevation: 139 metres (456 feet)
Location: Belleville, IL, US
County: Strafford, NH
Forecast Office: Portland (GYX)
Weather station Manager/Operator: William
Station type/software: Davis Vantage Pro 2/Vue with Weatherlink-IP

The elevation does not correspond with the estimated elevation (45 metres (148 feet) -- source Geonames) 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 'DW4640' 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.

Date	Latitude	Longitude	Elevation	Name
2010-03-01	38.5017	-89.9103	139	Belleville, IL US
2014-10-04	38.5017	-89.9103	139	Belleville, US
2014-10-05	38.5017	-89.9103	139	Belleville, IL, US
2023-02-21	43.1645	-70.9053	139	Belleville, IL, US

The position of the clicked point on the map is:

The position of the 'DW4640' marker on the map is:

Latitude: dummy (deg min sec), dummy (decimal), dummy (LORAN)
Longitude: dummy (deg min sec), dummy (decimal), dummy (LORAN)

There are no photographs of the station. If you are the site operator and have pictures of this location, then please email them to d4640@photo.gladstonefamily.net.

Picture Submission

There are two ways to submit pictures. If you are a flickr user, then see the flickr section below. Otherwise you can simply email the pictures as follows:

Email the pictures to d4640@photo.gladstonefamily.net.
If you use a smartphone that embeds the GPS coordinates in the pictures, then you can send any picture of a weather station to gps@photo.gladstonefamily.net and it will be associated with the correct station automatically.

Flickr Upload

Uploading picktures to flickr.com is easy. If you do not have a free flickr account, then you need to create one. Just go to flickr and click the 'Create your account' button. You can use a google account if you have one.

Once logged in, click on 'Upload Photos & Video'. Next click on 'Choose Photos and Videos', and walk through the process to upload your pictures. They will automatically be resized appropriately.

After the upload is complete, it will ask you to add titles, tags and descriptions. The key step is to add tags as follows:

wxtagged -- this indicates that this picture is of a weather station or surrounding area
wx:cwop=d4640 -- this indicates the site of which this is a picture
wxstation -- add this tag if the picture includes the weather station.

If you had to create your account, then you must upload at least five pictures. It will also take longer for your pictures to appear (a week or so). Otherwise, the pictures should appear after 24-48 hours.

You can try to find photographs from the area surrounding the site marker by clicking on Find nearby photographs. (There are some) (There are none) (There may be some) (Automatically loaded if any)

Data Status

Over the last 14 days, no data was seen on the following dates: 2024-04-06 to 2024-04-18.

A reasonably recent weather report (15 days ago) received from this station was
DW4640>APRS,TCPXX*,qAX,CWOP-5:@041845z4309.87N/07054.32W_126/001g004t032r004p044P014h97b09937L....DsIP

All the means and standard deviations shown below are from the last 14 days. Change analysis period to Last 3 days Last 7 days Last 4 weeks 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.

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. Since this station has not been reporting continuously during the analysis period (it missed 13 days out of 14), 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: Portland (GYX) .

Site	Distance		Location
GW4228	2.9 miles	South	DURHAM, NH, US (lat 43.1233°, long -70.9118°, altitude 68 metres)
CW8944	8.9 miles	North	Rochester, NH, US (lat 43.2900°, long -70.9482°, altitude 109 metres)
EW1744	9.2 miles	Southeast	Portsmouth, NH, US (lat 43.0797°, long -70.7653°, altitude -2 metres)
EW5711	10.2 miles	South	Greenland, NH, US (lat 43.0278°, long -70.8305°, altitude 18 metres)
CW5461	11.3 miles	North	BERWICK, ME, US (lat 43.3165°, long -70.8214°, altitude 115 metres)
W1JAB	12.9 miles	South	Exeter, NH, US (lat 42.9797°, long -70.9420°, altitude 10 metres)
FW3342	13.8 miles	Northwest	Strafford, NH, US (lat 43.2445°, long -71.1570°, altitude 162 metres)
FW6631	14.3 miles	Southwest	Nottingham, NH, US (lat 43.0733°, long -71.1595°, altitude 78 metres)
W1TG-2	16.3 miles	South	Hampton, NH, US (lat 42.9367°, long -70.8237°, altitude 16 metres)
DW9353	17.5 miles	Southwest	Fremont, NH, US (lat 42.9647°, long -71.1178°, altitude 41 metres)

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

Resources

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 William
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