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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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The elevation does not correspond with the estimated elevation (694 meters (2277 feet) -- source SRTM.C_SA_3) at that point. Either the location or the elevation (or both) are almost certain to be incorrect. Use the mapper to check the location. Please use the 'send the updated information' link below to update the location or elevation.
The site location should be at the mark shown -- or very close. Clicking within the map area (or you can drag the 'MM51' 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 meters. Note that handheld GPS receivers do not provide readings of elevation accurate to better than 10-20 meters (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 1 data source. 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.
Latitude: dummy (deg min sec), dummy (decimal), dummy (LORAN)
Longitude: dummy (deg min sec), dummy (decimal), dummy (LORAN)
Estimated elevation is dummy meters (dummy feet) from dummy.
There are no photographs of the station. If you have pictures of this location, then please upload them to Flickr (detailed instructions) and add the two tags 'wxtagged' and 'wx:metar=mm51'. If the picture is of the weather station itself, then please also add the 'wx:station' tag as well. Please geotag your images, and those coordinates may be used in the estimation of the location of this site.
You can try to find photographs from the area surrounding the site marker by clicking on Find nearby photographs. (There are some) (There are none) (There may be some) (Automatically loaded if any)
Status: Status: None found.Clicking on the map above will redo the search centered on the clicked point.
If any images are of the weather station, then please click on those images, and add the 'wxtagged' and 'wx:metar=mm51' tags to those images. For the station itself, please add the 'wx:station' tag as well. Some users do not permit other users to add tags to their images. In these cases, just add a comment to the picture asking the photographer to add the tags themselves.
Clicking on the map above will redo the search centered on the clicked point.
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 .
| Site | Distance | Location | |||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MMMV | 38.0 miles | Northwest | Monclova, CH, Mexico (lat 26.9000°, long -101.4300°, altitude 615 meters) (data present) | ||||||||||||||||||||||||||
| 76342 | 38.3 miles | Northwest | Monclova, Coah., Mexico (lat 26.9004°, long -101.4339°, altitude 615 meters) (data present) | ||||||||||||||||||||||||||
| MM36 | 44.6 miles | East | Rancho San Salvador Northeast (lat 26.6785°, long -100.1706°, altitude 274 meters) | ||||||||||||||||||||||||||
| MMAN | 66.9 miles | Southeast | Monterrey Intl A, MX, Mexico (lat 25.8656°, long -100.2372°, altitude 448 meters) (data present) | ||||||||||||||||||||||||||
XE2WR-3| 68.4 miles | Southeast | | Monterrey, NL MX (lat 25.7435°, long -100.4133°, altitude 720 meters)
(data present)
| 76393 | 72.3 miles | Southeast | | Monterrey, N.l., Mexico (lat 25.7333°, long -100.3000°, altitude 515 meters)
(data present)
| XE2NS-3 | 72.9 miles | Southeast | | Monterrey, MX (lat 25.7390°, long -100.2710°, altitude 493 meters)
(data present)
| MM21 | 74.6 miles | Southeast | | La Encarnacion (lat 25.7361°, long -100.2254°, altitude 475 meters)
| MM64 | 74.7 miles | West | | Cuatro Cienegas New (lat 26.9904°, long -102.0328°, altitude 746 meters)
| MMMY | 76.6 miles | Southeast | | Monterrey Intl, NL, Mexico (lat 25.7785°, long -100.1069°, altitude 387 meters)
(data present)
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The sites marked above thus did not report continuously during the analysis period, so the offsets may (probably will) not be accurate.
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 Guide (PDF): This is a guide to siting and operating a CWOP station. This is a must-read document.
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.