MesoWest Information for SE205 in SCE Conejo Grade, CA, United States Of America (site inactive)

The following information is known about SE205. 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.

For development purposes only
Sorry, we have no imagery here.
For development purposes only
Sorry, we have no imagery here.
SE205
EW7577
DW1941
EW9395
DW9395
DW2070
EW3855
K5KHP
GW0869
DW4415
CW9443
GW3329
DW0912
DW5145
DW0915
DW7457
FW8698
FW0112
WA6ZSN
FW8697
CW4488
EW4921
GW4144
FW8695
CW7664
FW8694
GW5094
FW7879
FW8729
GW4448
GW5599
EW1625
EW1856
KK6HO
DW0328
FW4689
EW0094
DW7412
FW6609
EW3531
FW9504
KE6RLG
FW1972
FW6046
EW8196
DW5544
CW0623
FW0577
DW2363
DW0345
DW9923
EW1734
K6ERN
GW1981
FW1035
FW7887
FW4250
EW6431
EW2805
FW4236
FW9489
DW4390
GW1098
DW0529
FW8202
FW2132
GW0783
KB6LA
GW3385
FW3101
CW1909
GW2421
GW5491
EW8682
FW9262
DW4674
GW4178
W6KL
K6LOT-13
FW9784
EW6618
EW0482
EW1845
GW4982
FW2368
DW1009
DW1271
FW5488
FW2143
DW6901
FW1624
GW2835
KI6SYE
CW2995
CW2234
K6BPM
DW3801
GW5968
FW9676
K6LCM-13
FW7638
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Registered Location

Latitude: 34° 12' 24" N (deg min sec), 34.2067° (decimal), 3412.40N (LORAN)
Longitude: 118° 58' 36" W (deg min sec), -118.9768° (decimal), 11858.61W (LORAN)
Elevation: 58 metres (191 feet) -- validated against 52 metres (171 feet) from Geonames
Location: SCE Conejo Grade, CA, United States Of America
County: Ventura, CA
Data provider: SC-EDISON
Forecast Office: Los Angeles (LOX)

The site location should be at the mark shown -- or very close. Clicking within the map area (or you can drag the 'SE205' 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.

Can you help with location quality? Please indicate if the marker on the map points at the weather instrument cluster:

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.

There are no photographs of the station. If you have pictures of this location, then please email them to se205@photo.gladstonefamily.net.

You can try to find photographs from the area surrounding the site marker by clicking on Find nearby photographs. (There may be some)

Data Status

Over the last 28 days, no data was seen on the following dates: 2025-02-14 to 2025-02-20, 2025-03-03 to 2025-03-11.

Recent observations from this weather station can be downloaded as a CSV file suitable for importing into various spreadsheet programs: last 7 days, last 14 days, last 28 days, last 56 days. This data can also be linked directly from Excel using a Web Query. The main link goes to the page with the data on it, and the IQY link is the Web Query that will access it: last 7 days (IQY: last 7 days), last 14 days (IQY: last 14 days), last 28 days (IQY: last 28 days), last 56 days (IQY: last 56 days).

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  

By default, the longer analysis periods display graphs that show the long term performance of this station. The graphs show the mean error over time, and include error bars which are one standard deviation long. This provides an easy way to see if there are any underlying trends in the data. Note that a 'step' in your data does not (necessarily) mean that something happened to your station. It could mean that another station came online in the local area, and they are changing the analysis.

The analysis is performed by MADIS. This web page just provides visualization of the data that MADIS produces. There are a number of very knowledgeable people who participate on the WXQC Mailing List who do understand exactly how MADIS works and can resolve issues when the analysis seems to be broken. However, in most cases, the station readings are at fault, or the software that is transmitting the data to CWOP. Please check those paths first.

You can also see how this station compares with other stations.

Temperature

  24 hours  Day time  Night time
Average temperature error0.2 °F1.1 °F-0.6 °F
Error standard deviation4.4 °F3.9 °F4.4 °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.

 
 
MADIS
rating
MADIS rating 87% QC OK
 

Latest daily graph:

Latest daily graph

These values are within the acceptable range. This probably means that your sensor is sited correctly and is calibrated correctly.

Dewpoint -- or switch to Relative Humidity

  24 hours  Day time  Night time
Average dewpoint error-4.1 °F-5.1 °F-3.5 °F
Error standard deviation5.7 °F6.0 °F5.5 °F
Worst average dewpoint error-8.6 °F-9.5 °F-13.5 °F
Worst standard deviation9.2 °F10.0 °F9.4 °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.

  Mean error (-4.1) is too large
 
MADIS
rating
MADIS rating 84% 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.

Wind Vector

The wind vector is the average wind over the relevant period. Note that if the wind blows North for half the time at 2 knots, and then blows South for the other half of the time at 2 knots, then the result is zero -- i.e. North wind and South wind will cancel out. Over time, the direction of the wind and of the analysis should match pretty well. If the lengths of the vector are different, then it could mean either that your anemometer reads high or low, or that you are in a more shielded or more open space.
MADIS
rating
MADIS rating 99% QC OK
TodayLast 7 days
Wind vector chartWind vector chart for last 7 days

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. The values reported are the differences between this station and the neighboring station. I.e. if the difference is positive, then this station is reading higher than the neighboring station. Since this station has not been reporting continuously during the analysis period (it missed 16 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
DW19411.6 milesSoutheast Newbury Park, CA, US (lat 34.1917°, long -118.9558°, altitude 214 metres) 5.3°F1.9°F
DW20703.5 milesNorthwest Camarillo, CA, US (lat 34.2312°, long -119.0300°, altitude 53 metres) 6.2°F-0.9°F
EW38553.5 milesNorthwest Camarillo, CA, US (lat 34.2355°, long -119.0275°, altitude 57 metres) 5.3°F-2.0°F
K5KHP3.9 milesWest CAMARILLO, CA, US (lat 34.2260°, long -119.0410°, altitude 46 metres) 6.3°F-2.7°F
DW44154.2 milesNorthwest Camarillo, CA, US (lat 34.2447°, long -119.0342°, altitude 93 metres) 4.6°F-0.0°F
CW94435.2 milesEast Thousand Oaks, CA, US (lat 34.2300°, long -118.8895°, altitude 282 metres) 2.1°F3.4°F
CW44889.2 milesWest Oxnard, CA, US (lat 34.2070°, long -119.1375°, altitude 19 metres) 7.2°F-2.0°F
GW509412.2 milesWest VENTURA, CA, US (lat 34.2718°, long -119.1743°, altitude 17 metres) 6.9°F-0.2°F
FW787912.6 milesWest Ventura, CA, US (lat 34.2717°, long -119.1833°, altitude 90 metres) 4.6°F-0.4°F
FW872912.7 milesNorthwest Ventura, CA, US (lat 34.2788°, long -119.1813°, altitude 84 metres) 5.6°F-0.9°F

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 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
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