CWOP Information for EW4533 (E4533) in Winchester, UK

The following information is known about EW4533. 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.

For development purposes only
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For development purposes only
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For development purposes only
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For development purposes only
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For development purposes only
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For development purposes only
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EW4533
CW6726
DW0218
EW4819
CW5570
FW7124
GW0285
FW8874
EW3525
FW4373
GW4551
DW7379
G3ZSS
EW4470
FW9075
DW5210
CW1734
CW5554
GW3220
DW0893
GW0067
DW0067
M1ELK
EW1940
CW5763
FW2795
FW9338
CW6617
GW4352
DW7087
EW8862
EW0805
FW5157
DW5398
DW2423
EW0121
DW6648
EW2181
EW0531
FW1762
DW5091
M0JGD
FW6684
G4CVN
FW4685
GW5992
FW0344
FW7063
DW0265
FW6021
GW0112
FW4226
DW4121
EW8640
DW4252
EW4610
FW8149
GW0882
G4KVI
FW0292
DW8816
EW6960
EW8088
GW0332
EW8153
FW5145
FW1936
EW2105
EW2169
CW0230
DW4433
M0TTB
DW5582
DW8084
DW0630
FW2350
GW4345
GW1592
2E0RGX-13
CW2888
DW9855
FW6665
CW1663
M3SXA-5
G7GQA-4
DW5621
GW3497
G6WOV
G4GVZ
FW9475
EW1315
DW1196
M0BPQ
CW6508
DW3390
G4MHJ-1
M3NIC-5
GW4382
EW4787
DW1143
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Registered Location

Latitude: 51° 3' 41" N (deg min sec), 51.0613° (decimal), 5103.68N (LORAN)
Longitude: 1° 18' 25" W (deg min sec), -1.3070° (decimal), 00118.42W (LORAN)
Elevation: 52 metres (171 feet) -- validated against 40 metres (131 feet) from Google
Location: Winchester, UK
Weather station Manager/Operator: Richard
Station type/software: Davis Vantage Pro 2/Vue with Weatherlink-Live

The site location should be at the mark shown -- or very close. Clicking within the map area (or you can drag the 'EW4533' 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 e4533@photo.gladstonefamily.net.

You can try to find photographs from the area surrounding the site marker by clicking on Find nearby photographs. (There are none)

For development purposes only
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For development purposes only
Sorry, we have no imagery here.
For development purposes only
Sorry, we have no imagery here.
For development purposes only
Sorry, we have no imagery here.
For development purposes only
Sorry, we have no imagery here.
For development purposes only
Sorry, we have no imagery here.
For development purposes only
Sorry, we have no imagery here.
For development purposes only
Sorry, we have no imagery here.
For development purposes only
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APRS pos
Registered
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APRS Location

APRS Location recorded at 2025-Mar-13 14:15 UTC
Latitude: 13° 52' 1" N (deg min sec), 13.8670° (decimal), 1352.02N (LORAN)
Longitude: 60° 54' 20" W (deg min sec), -60.9055° (decimal), 06054.33W (LORAN)

The location reported in the weather reports (via APRS) is significantly different to the registered location above. In particular, the difference is about 4172.0 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 findu.com.

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 2 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 3 days. Change analysis period to Last 7 days  Last 14 days  Last 4 weeks  Last 8 weeks  Last 13 weeks  Last 26 weeks  Last 39 weeks  Last 52 weeks  

By default, the longer analysis periods display graphs that show the long term performance of this station. The graphs show the mean error over time, and include error bars which are one standard deviation long. This provides an easy way to see if there are any underlying trends in the data. Note that a 'step' in your data does not (necessarily) mean that something happened to your station. It could mean that another station came online in the local area, and they are changing the analysis.

The analysis is performed by MADIS. This web page just provides visualization of the data that MADIS produces. There are a number of very knowledgeable people who participate on the WXQC Mailing List who do understand exactly how MADIS works and can resolve issues when the analysis seems to be broken. However, in most cases, the station readings are at fault, or the software that is transmitting the data to CWOP. Please check those paths first.

You can also see how this station compares with other stations.

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

Analyze: EW4533>APRS,TCPXX*,qAX,CWOP-7:@122145z1352.02N/06054.33W_108/000g004t078r000p011P011h00b10138L....DsWLL

Barometer

Average barometer error: 0.0 milliBars
Error standard deviation: 0.0 milliBars

 
MADIS
rating
MADIS rating 100% QC OK
 

Latest daily graph:

Latest daily graph

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

Temperature

  24 hours
Average temperature error-
Error standard deviation-

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
MADIS rating 100% QC OK
 

Latest daily graph:

Latest daily graph

Not enough data has been received to perform a day / night analysis to check for various types of shielding problems. Please wait a few days, and then try again.

Dewpoint -- or switch to Relative Humidity

  24 hours
Average dewpoint error-
Error standard deviation-

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
MADIS rating 100% QC OK
 

Latest daily graph:

Latest daily graph

Not enough data has been received to perform a day / night analysis to check for various types of shielding problems. Please wait a few days, and then try again.

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
MADIS rating 100% 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.

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 .

SiteDistanceLocationBarometerTemperatureDewpoint
CW67261.6 milesWest Winchester, UK (lat 51.0695°, long -1.3403°, altitude 84 metres)
DW021811.8 milesSouth Southampton, UK (lat 50.8997°, long -1.3955°, altitude 5 metres)
EW481913.8 milesSouthwest Totton, UK (lat 50.9080°, long -1.5080°, altitude 12 metres)
CW557014.0 milesSouthwest Southampton, UK (lat 50.9153°, long -1.5303°, altitude 19 metres)
FW712414.8 milesNortheast Basingstoke, UK (lat 51.2433°, long -1.1275°, altitude 116 metres)
GW028516.8 milesSoutheast Waterlooville, UK (lat 50.9147°, long -1.0003°, altitude 85 metres)
FW887417.1 milesEast Alton, UK (lat 51.1372°, long -0.9325°, altitude 141 metres)
EW352518.8 milesNortheast Basingstoke, UK (lat 51.3000°, long -1.1000°, altitude 90 metres)
FW437318.8 milesNortheast Basingstoke, UK (lat 51.2868°, long -1.0632°, altitude 87 metres)
GW455119.7 milesEast BINSTED, UK (lat 51.1650°, long -0.8850°, altitude 147 metres)

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

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 Richard
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