CWOP Information for DW7127 (D7127) in Castell, TX, US

The following information is known about DW7127. 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: 30° 42' 0" N (deg min sec), 30.7000° (decimal), 3042.00N (LORAN)
Longitude: 98° 54' 0" W (deg min sec), -98.9000° (decimal), 09854.00W (LORAN)
Elevation: 1285 metres (4216 feet)
Location: Castell, TX, US
County: Llano, TX
Forecast Office: Austin/San Antonio (EWX)
Weather station Manager/Operator: Gregg
Station type/software: Davis Vantage Pro 2/Vue with Weatherlink-IP

The elevation does not correspond with the estimated elevation (369 metres (1210 feet) -- source NED 1/9th arc-second: Central Texas) 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 'DW7127' 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 2105 days ago on 2013-11-17.

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 (2105 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: Austin/San Antonio (EWX) .

K6R915.3 milesEast Llano, Llano Municipal Airport, TX, United States (lat 30.7836°, long -98.6619°, altitude 336 metres)
7201115.3 milesEast Llano Municipal Airport, TX, United States of America (lat 30.7840°, long -98.6620°, altitude 336 metres)
KAQO15.4 milesNortheast Llano, Llano Municipal Airport, TX, United States (lat 30.7873°, long -98.6608°, altitude 336 metres) (data present)
TXS0416.8 milesSouth TxSON 4, TX, United States Of America (lat 30.4600°, long -98.9407°, altitude 588 metres) (data present)
KT9217.1 milesWest Mason County, TX, United States of America (lat 30.7322°, long -99.1843°, altitude 457 metres)
TXS0618.2 milesSouth TxSON 6, TX, United States Of America (lat 30.4421°, long -98.8427°, altitude 533 metres) (data present)
TXS0120.2 milesSouth TxSON 1, TX, United States Of America (lat 30.4205°, long -98.8033°, altitude 540 metres) (data present)
EW847624.6 milesSouthwest Fredericksburg, TX, US (lat 30.3780°, long -99.0750°, altitude 679 metres) (data present)
TWB4526.2 milesSouth Paul Tybor Gillespie, TX, United States Of America (lat 30.3255°, long -98.9677°, altitude 561 metres) (data present)
TXS0527.0 milesSoutheast TxSON 5, TX, United States Of America (lat 30.3989°, long -98.6105°, altitude 506 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 Gregg
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