CWOP Information for EW9147 (E9147) in Hayward, CA, US

The following information is known about EW9147. If you think that any information is incorrect, then please follow the instructions for correcting that data item.

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Registered Location

Latitude: 37° 36' 0" N (deg min sec), 37.6000° (decimal), 3736.00N (LORAN)
Longitude: 122° 6' 0" W (deg min sec), -122.1000° (decimal), 12206.00W (LORAN)
Elevation: 32 metres (105 feet)
Location: Hayward, CA, US
County: Alameda, CA
Forecast Office: San Francisco Bay Area (MTR)
Weather station Manager/Operator: Jeremy
Station type/software: Davis Vantage Pro 2/Vue with Weatherlink-IP

The elevation does not correspond with the estimated elevation (1 metres (4 feet) -- source Google) at that point. It seems probable that the elevation was entered as feet rather than as metres. 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 'EW9147' 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.

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 136 days ago on 2019-05-07.

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.

A reasonably recent weather report (136 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: San Francisco Bay Area (MTR) .

FW00380.0 milesSouth Wilmington, DE, US (lat 37.6000°, long -122.1000°, altitude 86 metres) (data present)
CW31091.7 milesEast Union City, CA, US (lat 37.5963°, long -122.0697°, altitude 3 metres) (data present)
UP6803.1 milesNortheast Tenysn, CA, United States Of America (lat 37.6338°, long -122.0627°, altitude 7 metres) (data present)
KHWD4.2 milesNorth HAYWARD AIR TERMINAL, CA, United States (lat 37.6589°, long -122.1211°, altitude 14 metres) (data present)
UP6394.7 milesSoutheast Newark, CA, United States Of America (lat 37.5430°, long -122.0539°, altitude 3 metres) (data present)
KW0RCA5.4 milesEast Union City, CA, US (lat 37.5942°, long -122.0022°, altitude 45 metres) (data present)
DW35605.4 milesNortheast Hayward, CA, US (lat 37.6545°, long -122.0288°, altitude 303 metres) (data present)
EW70415.7 milesEast Fremont, CA, US (lat 37.5803°, long -121.9993°, altitude 16 metres) (data present)
PG0137.6 milesNortheast Palomares Road, CA, United States Of America (lat 37.6893°, long -122.0204°, altitude 113 metres) (data present)
EW98567.7 milesNorth Castro Valley, CA, US (lat 37.7093°, long -122.0720°, altitude 92 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 Jeremy
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