CWOP Information for W6SAS (AS498) in Blackhawk, CA, US (site inactive)

The following information is known about W6SAS. 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: 37° 49' 7" N (deg min sec), 37.8185° (decimal), 3749.11N (LORAN)
Longitude: 122° 54' 29" W (deg min sec), -122.9082° (decimal), 12254.49W (LORAN)
Elevation: 0 metres (0 feet) -- validated against 0 metres (0 feet) from Geonames
Location: Blackhawk, CA, US
County: Contra Costa, CA
Forecast Office: San Francisco Bay Area (MTR)
Weather station Manager/Operator: Walter
Station type/software: Meteobridge 5.2

The site location should be at the mark shown -- or very close. Clicking within the map area (or you can drag the 'W6SAS' 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.

The station (or view from the station) is shown here. You can choose the view direction to see the surroundings. Other information (and somewhat larger images) can be found by clicking on the picture.

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

APRS Status

Your data is flowing into, but no weather data is being received from

A recently received report from this station was


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.

Data is being seen at, but this site is not currently marked as active. To fix this, send email to CWOP-Support and ask her to activate your site.

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: San Francisco Bay Area (MTR) .

PG41915.3 milesNortheast Five Brooks, CA, United States Of America (lat 37.9993°, long -122.7475°, altitude 148 metres) (data present)
PG48915.6 milesNortheast Bolinas Ridge Road, CA, United States Of America (lat 37.9514°, long -122.6764°, altitude 494 metres) (data present)
FW218517.6 milesNortheast Lagunitas, CA, US (lat 38.0200°, long -122.7100°, altitude 255 metres) (data present)
PG04118.0 milesNortheast Sir Francis Drake Blvd, CA, United States Of America (lat 38.0444°, long -122.7433°, altitude 122 metres) (data present)
PG04618.2 milesNorth Drakes View Drive, CA, United States Of America (lat 38.0799°, long -122.8671°, altitude 404 metres) (data present)
EW993918.5 milesEast Mill Valley, CA, US (lat 37.9168°, long -122.5938°, altitude 550 metres) (data present)
PG55018.6 milesNortheast San Geronimo Ridge Road, CA, United States Of America (lat 37.9987°, long -122.6560°, altitude 402 metres) (data present)
PG00619.1 milesEast Hogback Road, CA, United States Of America (lat 37.9117°, long -122.5787°, altitude 314 metres) (data present)
EW828419.2 milesEast Mill Valley, CA, US (lat 37.8920°, long -122.5693°, altitude 51 metres) (data present)
PG03719.4 milesNortheast Sky Oaks Road, CA, United States Of America (lat 37.9656°, long -122.6052°, altitude 209 metres) (data present)

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 Walter
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