MesoWest Information for BOCSD in Boulder Creek, CA, United States Of America (site inactive)

The following information is known about BOCSD. 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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BOCSD
KG6SIB
FW0019
CW7802
EW4618
FW0527
KF6ILA
EW3263
EW9979
GW0500
CW2462
FW6122
EW9965
FW8337
WB6EDK-1
EW4858
GW0429
GW3826
FW8607
GW1614
EW8057
EW3309
EW3619
EW9437
EW3070
EW3333
EW3241
DW1910
GW2467
EW3759
EW3204
EW4521
GW0544
GW5788
FW4601
CW9761
FW6664
FW4645
DW5256
CW7369
CW9939
EW9622
CW3287
FW0958
EW5989
FW0775
GW4109
DW4679
DW9888
EW2652
DW6178
EW3680
DW9108
GW2085
GW4525
GW1405
GW4483
KG6MOZ
DW2868
EW1401
W6NWF
CW8688
GW4747
FW8651
EW3236
GW3177
GW4486
GW4349
EW1483
DW3640
FW0551
FW2603
GW5543
GW4484
GW4481
FW7485
FW0381
FW5316
FW6209
EW6576
EW7837
WB6YTE
KF6ILA-10
FW9926
EW1631
KI6AOK
FW1128
FW5196
GW4485
EW5516
GW4479
EW9873
EW8360
EW3219
EW6321
GW5000
FW8166
EW9983
KE6BZI
GW0974
GW5206
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Registered Location

Latitude: 32° 56' 25" N (deg min sec), 32.9404° (decimal), 3256.42N (LORAN)
Longitude: 116° 38' 12" W (deg min sec), -116.6367° (decimal), 11638.20W (LORAN)
Elevation: 1130 metres (3706 feet) -- validated against 1130 metres (3706 feet) from NED 1/3rd arc-second: Western United States
Location: Boulder Creek, CA, United States Of America
County: San Diego, CA
Data provider: SDGE
Forecast Office: San Diego (SGX)

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

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

You can try to find photographs from the area surrounding the site marker by clicking on Find nearby photographs. (There are none)

Data Status

Over the last 28 days, no data was seen on the following dates: 2025-02-18 to 2025-02-20, 2025-03-03 to 2025-03-16.

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  

Temperature

  24 hours  Day time  Night time
Average temperature error-2.5 °F0.4 °F-5.2 °F
Error standard deviation4.3 °F2.9 °F3.7 °F
Worst average temperature error-5.3 °F2.2 °F-9.6 °F
Worst standard deviation5.8 °F3.9 °F4.2 °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.

 
 
MADIS
rating
MADIS rating 75% QC OK
Sensor fails following checks:
L2 Internal Consistency
L3 Spatial Consistency
 

Latest daily graph:

Latest daily graph

It appears that your station is sited near the edge of a large urban area. This causes the analysis values to be lowered than expected as the quality control system does not take the location of the urban area into account.

Dewpoint -- or switch to Relative Humidity

  24 hours  Day time  Night time
Average dewpoint error0.0 °F-0.3 °F0.3 °F
Error standard deviation3.7 °F2.9 °F4.0 °F
Worst average dewpoint error-3.7 °F3.5 °F-4.7 °F
Worst standard deviation4.8 °F4.2 °F5.8 °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.

  Standard deviation (3.7) is too large
 
MADIS
rating
MADIS rating 92% 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 90% 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 17 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: San Diego (SGX) .

SiteDistanceLocationBarometerTemperatureDewpoint
EW46187.4 milesNorth Julian, CA, US (lat 33.0472°, long -116.6323°, altitude 1320 metres) 7.6°F-3.2°F
FW05277.8 milesSoutheast Guatay, CA, US (lat 32.8512°, long -116.5552°, altitude 1230 metres) 11.0°F-4.6°F
EW996516.4 milesSouthwest Lakeside, CA, US (lat 32.8413°, long -116.8928°, altitude 188 metres) 20.2°F-16.6°F
FW833717.4 milesWest Lakeside, CA, US (lat 32.8755°, long -116.9262°, altitude 134 metres) 21.8°F-18.2°F
WB6EDK-118.3 milesWest Ramona, CA, US (lat 33.0140°, long -116.9400°, altitude 484 metres) 12.2°F-14.4°F
FW860721.4 milesSouthwest Jamul, CA, US (lat 32.7050°, long -116.8770°, altitude 337 metres) 9.4°F-15.4°F
EW330921.9 milesWest Santee, CA, US (lat 32.8625°, long -117.0020°, altitude 153 metres) 20.6°F-17.8°F
EW307022.2 milesSouthwest Rancho San Diego, CA, US (lat 32.7422°, long -116.9367°, altitude 150 metres) 20.2°F-18.5°F
EW324122.2 milesWest Poway, CA, US (lat 32.9605°, long -117.0192°, altitude 178 metres) 21.0°F-17.3°F
EW452123.1 milesSouthwest La Mesa, CA, US (lat 32.7668°, long -116.9773°, altitude 283 metres) 18.8°F-16.0°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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