CWOP Information for FW0258 (F0258) in Walnut Creek, CA, US (site inactive)

The following information is known about FW0258. 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° 55' 8" N (deg min sec), 37.9188° (decimal), 3755.13N (LORAN)
Longitude: 122° 1' 42" W (deg min sec), -122.0283° (decimal), 12201.70W (LORAN)
Elevation: 43 metres (140 feet) -- validated against 43 metres (139 feet) from Google
Location: Walnut Creek, CA, US
County: Contra Costa, CA
Forecast Office: San Francisco Bay Area (MTR)
Weather station Manager/Operator: Shea
Station type/software: Weather Display / Acu-Rite 5-in-1

The site location should be at the mark shown -- or very close. Clicking within the map area (or you can drag the 'FW0258' 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 348 days ago on 2022-04-14.

A recently received report from this station was

FW0258>APRS,TCPXX*,qAX,CWOP-3:@142058z3755.13N/12201.70W_000/000g001t048r000p000P000b10119h59.WD 400

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.

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) .

0859P0.4 milesSouthwest Rancho San Miguel, CA, United States Of America (lat 37.9156°, long -122.0338°, altitude 43 metres)
3810P0.9 milesNorthwest PurpleAir 3810P, CA, United States Of America (lat 37.9296°, long -122.0366°, altitude 29 metres)
FW90901.2 milesEast Walnut Creek, CA, US (lat 37.9177°, long -122.0065°, altitude 54 metres) (data present)
KJ6APE1.5 milesNortheast Walnut Creek, CA, US (lat 37.9370°, long -122.0148°, altitude 31 metres) (data present)
EW16282.0 milesSouth Walnut Creek, CA, US (lat 37.8905°, long -122.0355°, altitude 81 metres) (data present)
EW84302.5 milesSouthwest Walnut Creek, CA, US (lat 37.9000°, long -122.0668°, altitude 50 metres) (data present)
FW75143.0 milesNortheast Concord, CA, US (lat 37.9555°, long -121.9973°, altitude 220 metres) (data present)
FW28183.1 milesNortheast Concord, CA, US (lat 37.9562°, long -121.9958°, altitude 69 metres) (data present)
CW38843.2 milesNorth Concord, CA, US (lat 37.9618°, long -122.0070°, altitude 44 metres) (data present)
KA6UPU-13.4 milesWest Lafayette, CA, US (lat 37.9250°, long -122.0905°, altitude 63 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 Shea
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