AIRNow Information for AN394 in Wash. Crossing, NJ, United States of America

The following information is known about AN394. 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: 40° 18' 45" N (deg min sec), 40.3125° (decimal), 4018.75N (LORAN)
Longitude: 74° 52' 22" W (deg min sec), -74.8729° (decimal), 07452.37W (LORAN)
Elevation: 61 metres (200 feet) -- validated against 59 metres (193 feet) from NED 1/9th arc-second: Mercer County New Jersey
Location: Wash. Crossing, NJ, United States of America
County: Mercer, NJ
Data provider: EPAOAP
Forecast Office: Philadelphia/Mt Holly (PHI)

The site location should be at the mark shown -- or very close. Clicking within the map area (or you can drag the 'AN394' 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:

The location information for this site was gathered from 1 data source. 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

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: 2016-04-30 to 2016-05-01, 2016-05-06, 2016-05-22.

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  


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. Since this station has not been reporting continuously during the analysis period (it missed 4 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: Philadelphia/Mt Holly (PHI) .

EW64541.7 milesSouthwest New Hope, PA, US (lat 40.3000°, long -74.9000°, altitude 66 metres) 1.4°F
KTTN3.9 milesSoutheast TRENTON MERCER COUNTY AIRPORT , NJ, United States (lat 40.2768°, long -74.8159°, altitude 64 metres) 0.3°F
DW91425.8 milesSoutheast Ewing, NJ, US (lat 40.2599°, long -74.7863°, altitude 30 metres) 0.8°F
AN3937.2 milesEast Rider University, NJ, United States of America (lat 40.2831°, long -74.7426°, altitude 29 metres) 1.4°F
DW54168.6 milesSoutheast Lawrence Township, NJ, US (lat 40.2530°, long -74.7290°, altitude 26 metres) 0.8°F
CW485910.9 milesSoutheast Mercerville, NJ, US (lat 40.2508°, long -74.6830°, altitude 19 metres) -0.2°F
EW792311.1 milesEast Hamilton, NJ, US (lat 40.2640°, long -74.6733°, altitude 20 metres) 0.6°F
K3QV11.1 milesSouth Penndel, PA, US (lat 40.1563°, long -74.9175°, altitude 32 metres) -0.6°F
KDYL13.2 milesWest DOYLESTOWN AIRPORT, PA, United States (lat 40.3302°, long -75.1229°, altitude 120 metres) 1.5°F
AN39214.5 milesNorth Flemington, NJ, United States of America (lat 40.5153°, long -74.8068°, altitude 44 metres) 1.8°F

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

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
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