CWOP Information for K6TZ (AR320) in Diablo Peak, CA US

The following information is known about K6TZ. 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: 34° 1' 46" N (deg min sec), 34.0296° (decimal), 3401.77N (LORAN)
Longitude: 119° 47' 10" W (deg min sec), -119.7861° (decimal), 11947.16W (LORAN)
Elevation: 757 meters (2484 feet)
Location: Diablo Peak, CA US
County: Santa Barbara, CA
Forecast Office: Los Angeles (LOX)
Station type/software: Byonics WxTrak, Peet Brothers Ultimeter 2000
Website: http://www.diablo.sbarc.org/imageview.cgi

The elevation does not correspond with the estimated elevation (705 meters (2312 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 'K6TZ' 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.

The station (or view from the station) is shown here. You can choose the view direction to see the surroundings. Other information (and somewhat larger images) can be found by clicking on the picture.

You can try to find photographs from the area surrounding the site marker by clicking on Find nearby photographs.

Data Status

Over the last 28 days, no data was seen on the following dates: 2008-08-22 to 2008-09-05.

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  Last 52 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.

Barometer

Average barometer error: -0.4 milliBars
Error standard deviation: 0.5 milliBars

 
MADIS
rating
MADIS rating 100% QC OK
 

Latest daily graph:

Latest daily graph

These values are within range, so your sensor is probably calibrated correctly.

Temperature

  24 hours  Day time  Night time
Average temperature error-18.1 °F-15.5 °F-21.3 °F
Error standard deviation6.2 °F6.0 °F4.8 °F
Worst average temperature error-22.5 °F-19.2 °F-26.0 °F
Worst standard deviation7.5 °F7.8 °F6.2 °F

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.

  Location problem
 
MADIS
rating
MADIS rating 18% QC OK
Sensor fails L2 statistical
consistency check.
 

Latest daily graph:

Latest daily graph

The values returned by your sensor indicate a system problem. This can be caused by a 'stuck' sensor that always reports the same value. Please check your station for proper operation.

Dewpoint -- or switch to Relative Humidity

  24 hours  Day time  Night time
Average dewpoint error5.2 °F4.2 °F6.2 °F
Error standard deviation6.9 °F7.1 °F6.2 °F
Worst average dewpoint error9.5 °F7.9 °F12.1 °F
Worst standard deviation11.2 °F11.4 °F10.3 °F

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.

  Location problem
 
MADIS
rating
MADIS rating 86% QC OK
 

Latest daily graph:

Latest daily graph

Your readings are not within an acceptable error range. The automated problem analysis cannot identify the problem. You can signup on the wxqc mailing list and post information about this situation there. This is may be caused by poor siting of the sensor (e.g. under eves, in screen porch, or in thick tree coverage). For information on siting, see CWOP Station Guide.

Neighboring Stations

This is a list of stations that are close to this station. Note that this is not the list of stations that are used in the data analysis. That list of stations is known only to MADIS. You can see all the stations at MADIS Data Display. Your station should be in the middle of the display. If you think that the analysis is incorrect, then maybe one of the close stations has failed.

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 15 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: Los Angeles (LOX) .

SiteDistanceLocationBarometerTemperatureDewpoint
K6TZ-1026.3 milesNorth Santa Barbra, CA US (lat 34.4057°, long -119.7152°, altitude 143 meters) 1.6mb16.9°F-10.1°F
KSBA27.6 milesNorth Santa Barbara, CA (lat 34.4258°, long -119.8425°, altitude 3 meters) 1.5mb19.2°F-10.1°F
WB6KDH29.0 milesNorth Goleta, CA US (lat 34.4400°, long -119.8869°, altitude 43 meters) 1.5mb17.1°F-11.1°F
K6TZ-1132.8 milesNorth La Cambre Peak, CA US (lat 34.5003°, long -119.7212°, altitude 1204 meters) 3.9mb-26.7°F-13.1°F
CW851433.0 milesNortheast Ventura, CA US (lat 34.2835°, long -119.2970°, altitude 81 meters) 0.7mb15.8°F-12.9°F
KOXR35.2 milesEast Oxnard, CA (lat 34.2008°, long -119.2072°, altitude 10 meters) 1.3mb18.7°F-11.6°F
CW981438.3 milesNortheast Oak View, CA US (lat 34.4117°, long -119.3005°, altitude 887 meters) 0.9mb-2.7°F-8.9°F
CW148438.5 milesNortheast Ventura, CA US (lat 34.2767°, long -119.1833°, altitude 82 meters) 1.5mb15.9°F-5.3°F
KNTD38.6 milesEast Pt Mugu Naws, CA (lat 34.1203°, long -119.1209°, altitude 3 meters) 1.8mb19.2°F-12.6°F
CW649939.1 milesNorthwest Gaviota, CA US (lat 34.4758°, long -120.2045°, altitude 45 meters) 3.0mb18.0°F-11.0°F

The sites marked above thus did not report continuously during the analysis period, so the offsets may (probably will) not be accurate.

Quality Control Notes

This page reports on the quality control checks performed by MADIS. The green check mark and red cross are chosen based on the average performance during the analysis period (which is selectable above). The red cross can appear even if MADIS reports that all observations pass the MADIS QC checks.

The 'MADIS rating' reports on the percentage of observations that pass the MADIS checks. You should aim for two thumbs up!

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

Resources

CWOP Home: This describes the whole CWOP program and has a large amount of useful information.

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.


Website comments, problems etc to
Philip Gladstone

Last modified Monday, 01 September 2008
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