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.
The elevation does not correspond with the estimated elevation (87 metres (287 feet) -- source Google) at that point. Either the location or the elevation (or both) are almost certain to be incorrect. Please use the 'send the updated information' link below to update the location or elevation.
The site coordinates appear to be of low precision, and the station may be anywhere within the marked area. Clicking within the map area (or you can drag the 'KWBC' 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.
The location information for this site was gathered from 2 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.
|2011-01-24||38.8500||-76.9300||50||Nws Hdqtrs, US|
|2015-03-06||38.8500||-76.9300||50||Nws Hdqtrs, US|
|2015-03-07||38.8500||-76.9300||50||Nws Hdqtrs, United States of America|
There are no photographs of the station. If you have pictures of this location, then please email them to email@example.com.
You can try to find photographs from the area surrounding the site marker by clicking on Find nearby photographs.
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 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.
A recently received weather report from this station was
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) .
|KADW||4.3 miles||Southeast||Camp Springs / Andrews Air Force Base, MD, United States (lat 38.8108°, long -76.8670°, altitude 86 metres)|
|EW5548||5.1 miles||Northwest||Washington, DC, US (lat 38.9000°, long -77.0000°, altitude 2 metres)|
|KDCA||5.6 miles||West||WASHINGTON NATIONAL AIRPORT , VA, United States (lat 38.8472°, long -77.0345°, altitude 3 metres)|
|CW8838||8.8 miles||West||Douglas Park, VA, US (lat 38.8502°, long -77.0941°, altitude 56 metres)|
|KCGS||9.0 miles||North||College Park AP, College Park, MD, United States of America (lat 38.9806°, long -76.9223°, altitude 15 metres)|
|DW4441||9.5 miles||North||Takoma Park, MD, US (lat 38.9785°, long -76.9941°, altitude 53 metres)|
|AN274||10.3 miles||East||Prince Georges Co. Equestrian Ctr, MD, United States of America (lat 38.8120°, long -76.7443°, altitude 5 metres)|
|DW6279||12.0 miles||Northwest||Chevy Chase, MD, US (lat 38.9662°, long -77.0947°, altitude 98 metres)|
|AG4JW||12.0 miles||West||Arlington, VA, US (lat 38.8955°, long -77.1445°, altitude 119 metres)|
|DW9421||12.1 miles||Northwest||Silver Spring, MD, US (lat 39.0060°, long -77.0328°, altitude 106 metres)|
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 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.