CWOP Information for DW4441 (D4441) in Takoma Park, MD, US

The following information is known about DW4441. 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: 38° 58' 43" N (deg min sec), 38.9785° (decimal), 3858.71N (LORAN)
Longitude: 76° 59' 39" W (deg min sec), -76.9941° (decimal), 07659.64W (LORAN)
Elevation: 53 metres (175 feet) -- validated against 54 metres (176 feet) from NED 1/3rd arc-second: Eastern United States
Location: Takoma Park, MD, US
County: Montgomery, MD
Forecast Office: Baltimore/Washington (LWX)
Weather station Manager/Operator: Tim
Station type/software: WeatherSnoop / Davis Vantage Pro

The site location should be at the mark shown -- or very close. Clicking within the map area (or you can drag the 'DW4441' 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

You can try to find photographs from the area surrounding the site marker by clicking on Find nearby photographs.

APRS Status

No data has been seen recently. Please check at to see if your data is being seen there.

Weather data was seen at around 150 days ago on 2021-07-02.

A recently received report from this station was


This report was not parsed as a valid APRS message.

If this is not a weather report, then your station may not be transmitting weather reports, and this may be the problem. Check the recent reports at to see if any look like weather reports.

A reasonably recent weather report (149 days ago) received from this station was

Neighboring Stations

This is a list of stations that are close to this 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: Baltimore/Washington (LWX) .

SLVM22.3 milesNorthwest Nws Headquarters, MD, United States of America (lat 38.9939°, long -77.0314°, altitude 274 metres)
DW94212.8 milesNorthwest Silver Spring, MD, US (lat 39.0060°, long -77.0328°, altitude 103 metres) (data present)
KB3PHD3.4 milesSoutheast Riverdale, MD, US (lat 38.9587°, long -76.9358°, altitude 10 metres) (data present)
KCGS3.9 milesEast College Park AP, College Park, MD, United States of America (lat 38.9806°, long -76.9223°, altitude 15 metres) (data present)
EW28094.6 milesNorth White Oak, MD, US (lat 39.0450°, long -76.9950°, altitude 117 metres) (data present)
EW85524.6 milesNorthwest Silver Spring, MD, US (lat 39.0200°, long -77.0610°, altitude 110 metres) (data present)
FW13415.2 milesSouth Washington, DC, US (lat 38.9033°, long -76.9882°, altitude 20 metres) (data present)
DW62795.4 milesWest Chevy Chase, MD, US (lat 38.9660°, long -77.0940°, altitude 88 metres) (data present)
DW21145.9 milesNorthwest Ashburn, VA, US (lat 39.0487°, long -77.0580°, altitude 114 metres) (data present)
FW14026.2 milesSouthwest Washington, DC, US (lat 38.9080°, long -77.0658°, altitude 30 metres) (data present)

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
Questions for this weather station owner/operator to Tim
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