NonFedAWOS Information for KLDJ (LDJ) in Linden Airport, NJ, United States of America (site inactive)

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.

	← Move left → Move right ↑ Move up ↓ Move down + Zoom in - Zoom out Home Jump left by 75% End Jump right by 75% Page Up Jump up by 75% Page Down Jump down by 75% 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. KLDJ FW5744 FW2134 EW6780 EW5922 EW7893 W2GRK-15 DW8569 EW9472 HSNN4 DW5872 EW1297 GW3720 EW7496 EW1104 EW1296 EW9345 FW2280 FW2099 DW7414 FW9434 FW0683 GW0727 DW9249 CW0888 CW0880 GW3011 EW6999 FW7777 CW1367 FW8726 FW1417 GW2242 DW5729 GW3531 DW0538 GW2861 CW7536 FW2092 GW3799 NE2X FW8442 FW7566 W2IRT GW3934 EW4570 CW0858 GW4171 FW7617 CW1053 FW4321 DW8219 GW4812 FW7545 FW6261 FW1299 FW3165 DW9152 FW2458 GW2248 FW8114 DW1105 CW0960 KB2EAR-13 FW8945 NI2O N2WH DW6004 GW5613 GW5372 EW6513 DW8195 EW4385 W2GUX GW0992 EW0532 CW5425 EW9411 DW8340 FW4161 CW0172 CW6872 GW1060 FW1633 CW5896 CW1735 GW3822 EW3330 EW9686 FW7223 EW0478 DW1901 DW8086 GW4056 N2XP CW2073 FW1075 EW3462 GW4041 GW1808 EW9800 To navigate, press the arrow keys. Keyboard shortcuts Map DataImage may be subject to copyright 100 m  Click to toggle between metric and imperial units Terms Report a map error This page can't load Google Maps correctly. Do you own this website? OK
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Registered Location

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

Can you help with location quality? Please indicate if the marker on the map points at the weather instrument cluster: -- please choose Yes Almost -- can see instruments No -- no instruments to be seen No -- cannot zoom in to see Not sure what instruments look like

The location information for this site was gathered from 14 data sources. The source which most closely matches the consensus is chosen. Many of these sources only report the location to the nearest minute (or hundredth of degree). This can lead to the marker being placed noticeably incorrectly. Please see Discussion of Location Errors for more information. Show location history.

There are no photographs of the station. If you have pictures of this location, then please email them to kldj@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 kldj@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:id=kldj -- 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

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  

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.

Barometer

Average barometer error: -0.5 milliBars Error standard deviation: 0.4 milliBars

MADIS rating

Latest daily graph:

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

Temperature

24 hours   Day time   Night time Average temperature error -0.5 °F -0.6 °F -0.4 °F Error standard deviation 1.1 °F 1.2 °F 1.0 °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

Latest daily graph:

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

Relative Humidity -- or switch to Dewpoint

Latest daily graph:

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 Sensor fails following checks: L3 Spatial Consistency

Today		Last 7 days

Neighboring Stations

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 . For stations covered by your Forecast Office: New York City (OKX) .

Quality Control Notes

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

Location Formats

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 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.