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The elevation does not correspond with the estimated elevation (172 meters (565 feet) -- source NED Contiguous U. S. 1/3W arc second elevation data) 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 'CW8389' 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.
NOTE: The Registered Location is the location that the station owner provided when they signed up with CWOP.
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 are the site operator and have pictures of this location, then please upload them to Flickr (detailed instructions) and add the two tags 'wxtagged' and 'wx:cwop=c8389'. If the picture is of the weather station itself, then please also add the 'wx:station' tag as well.
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.
Clicking on the map above will redo the search centered on the clicked point.
A reasonably recent weather report received from this station was
CW8389>APRS,TCPXX*,qAX,CORE-2:@301203z4014.83N/12407.18W_158/000g000t051r000P000p000h80b10127v2
The problem with missing data may be that the station software is configured to send data to the old servers. If you are the station operator, then please change the configuration to send data to cwop.aprs.net on port 14580. See http://www.wxqa.com/servers2use.html for the full story.
All the means and standard deviations shown below are from the last 28 days. Change analysis period to Last 3 days Last 7 days Last 14 days Last 8 weeks Last 13 weeks Last 26 weeks Last 39 weeks
The inconsistency noted above in your location information means that the analyzed readings for your location may be incorrect. For example, if your location is incorrect, then the analysis values will be for a location other than your station. This will give different analysis results, probably leading to errors being shown below. If the elevation is incorrect, then the comparison of temperature readings will be in error.
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Latest daily graph:
There is a significant mean error in your barometer readings. You may need to calibrate your barometer. Since your readings are low, it is possible that your software is not adjusting the reading for elevation, or that your station altitude has been entered incorrectly into your software.
NOTE: If the error above is POSITIVE, then it means that the analysis temperature is HIGHER than the reported temperature. This means that your sensor is reading COLDER than expected. |
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Latest daily graph:
Your readings indicate a solar heating problem. This means that the sun can shine directly onto the temperature sensor (or it's housing) and increase the temperature recorded significantly. This is often caused by the lack of a radiation shield, or the sensor is poorly sited. For information on radiation shields, see CWOP Radiation Shields, and information on siting, see CWOP Station Guide.
NOTE: If the error above is POSITIVE, then it means that the analysis temperature is HIGHER than the reported temperature. This means that your sensor is reading COLDER than expected. |
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Latest daily graph:
These values are within the acceptable range. This probably means that your sensor is sited correctly and is calibrated correctly.
You can look at those for comparison purposes. The average difference between your station and each station below is listed as well. This may allow you to detect local stations which are erroneous. You can also use these numbers to adjust your instruments -- especially if a number of ASOS stations have similar differences to your station. Also, try increasing the analysis period to more than the default 28 days. The difference is only given if both stations report reasonably often during each day. Some stations only report every 6 hours, and this makes the average of less interest. In this case, the average is not displayed. Since this station has not been reporting continuously during the analysis period (it missed 18 days out of 28), the offsets below may not be accurate.
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: Eureka (EKA) .
| Site | Distance | Location | Barometer | Temperature | Dewpoint | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
CW3631| 2.4 miles | West | | Honeydew, CA US (lat 40.2485°, long -124.1645°, altitude 91 meters)
| -6.1mb | 5.9°F | 4.1°F
| CW5061 | 22.1 miles | North | | Fortuna, CA US (lat 40.5667°, long -124.1272°, altitude 56 meters)
| -5.7mb | 10.1°F | -4.3°F
| CW7137 | 36.0 miles | North | | Eureka, CA US (lat 40.7662°, long -124.1645°, altitude 43 meters)
| -6.7mb | 13.6°F | -2.1°F
| CW9181 | 36.8 miles | North | | Eureka, CA US (lat 40.7788°, long -124.1642°, altitude 40 meters)
| -6.9mb | 14.0°F | -2.4°F
| KEKA | 38.3 miles | North | | Eureka, CA (lat 40.8000°, long -124.1667°, altitude 18 meters)
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| KACV | 50.6 miles | North | | Arcata/eureka Ar, CA (lat 40.9781°, long -124.1086°, altitude 67 meters)
| -7.0mb | 15.7°F | -2.0°F
| CW0570 | 56.5 miles | North | | Blue Lake, CA US (lat 41.0421°, long -123.8756°, altitude 183 meters)
| -3.9mb | 5.3°F | -4.3°F
| CN01 | 58.9 miles | South | | Mendocino Coast District Hospital, CA, United States of America (lat 39.4320°, long -123.7996°, altitude <unknown> meters)
| -5.8mb | 10.7°F | -0.9°F
| CW3111 | 59.2 miles | Southeast | | Covelo, CA US (lat 39.7537°, long -123.2072°, altitude 420 meters)
| -4.5mb | -5.9°F | 2.4°F
| DW0432 | 69.6 miles | Southeast | | Willits, CA US (lat 39.3940°, long -123.4252°, altitude 600 meters)
| -4.4mb | -0.9°F | 0.0°F
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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.
The 'MADIS rating' reports on the percentage of observations that pass the MADIS checks. You should aim for two thumbs up!
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.
