MesoWest Information for PG824 in Lake Spaulding, CA, United States Of America (site inactive)

The following information is known about PG824. 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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PG824
CW6842
FW5892
EW2457
WA7JAY
EW9947
FW0079
FW6155
GW4188
EW3651
GW1961
DW9019
DW9436
KE6OBI
GW5419
FW9018
EW6355
N6ZQK
GW2618
GW0434
K9JM
DW9434
GAPWX
FW8247
DW9413
EW6476
GW0714
FW5669
EW6293
GW0254
FW9354
EW1336
DW8862
GW4338
DW4069
GW1055
FW9934
FW5165
FW9304
FW7603
EW5691
FW9917
K6MLE
CW5121
GW3537
EW4543
CW6601
FW7537
KI6PPU
N7FEQ
GW0346
DW7259
EW6216
N7QMJ
CW6129
GW1849
EW4877
GW2216
GW1956
EW6551
K7SFN
EW3758
GW0367
N6YV
DW7902
DW4464
FW0538
CW1177
GW3614
DW2103
CW6120
FW7206
EW9372
DW7401
EW9139
FW9070
FW5459
CW5914
EW4740
EW8944
K6ALF
DW7413
AJ7E
EW8905
FW0443
GW4632
FW6285
DW5805
GW1258
KM6WRX
FW0451
GW0946
EW8856
KQ7A
GW0802
EW9574
DW8590
CW9181
DW0026
DW6835
FW9048
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Registered Location

Latitude: 39° 19' 30" N (deg min sec), 39.3250° (decimal), 3919.50N (LORAN)
Longitude: 120° 38' 34" W (deg min sec), -120.6429° (decimal), 12038.57W (LORAN)
Elevation: 1562 metres (5125 feet) -- validated against 1558 metres (5112 feet) from Geonames
Location: Lake Spaulding, CA, United States Of America
County: Nevada, CA
Data provider: PGE
Forecast Offices: Sacramento (STO), Reno (REV)

The site location should be at the mark shown -- or very close. Clicking within the map area (or you can drag the 'PG824' 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 pg824@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: 2025-02-17 to 2025-02-20, 2025-03-03 to 2025-03-14.

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-1.8 °F0.1 °F-3.1 °F
Error standard deviation2.8 °F2.5 °F2.3 °F
Worst average temperature error-2.7 °F1.2 °F-3.8 °F
Worst standard deviation3.3 °F2.9 °F2.9 °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 99% QC OK
 

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 error-2.9 °F-2.8 °F-2.8 °F
Error standard deviation2.4 °F2.5 °F2.4 °F
Worst average dewpoint error-4.3 °F-5.0 °F-4.7 °F
Worst standard deviation3.4 °F4.0 °F3.2 °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.

  Mean error (-2.9) out of range, but low standard deviation (2.4)
 
MADIS
rating
MADIS rating 99% QC OK
 

Latest daily graph:

Latest daily graph

There is a significant mean error in your dewpoint readings. You may need to calibrate your dewpoint sensor. 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 100% 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: Sacramento (STO),Reno (REV) .

SiteDistanceLocationBarometerTemperatureDewpoint
EW994720.3 milesWest Nevada City, CA, US (lat 39.2385°, long -121.0058°, altitude 966 metres) 9.3°F-10.0°F
EW365121.7 milesWest Nevada City, CA, US (lat 39.3380°, long -121.0475°, altitude 780 metres) 14.5°F-11.2°F
DW943623.8 milesEast Truckee, CA, US (lat 39.3498°, long -120.1993°, altitude 1972 metres) 5.6°F1.4°F
KE6OBI23.8 milesSouthwest Foresthill, CA, US (lat 39.0187°, long -120.8458°, altitude 919 metres) 11.7°F-12.0°F
FW901825.0 milesWest Grass Valley, CA, US (lat 39.2269°, long -121.0932°, altitude 694 metres) 15.4°F-12.7°F
N6ZQK25.2 milesSouthwest FORESTHILL, CA, US (lat 39.0053°, long -120.8693°, altitude 875 metres) 11.3°F-12.2°F
GW261825.3 milesWest Nevada City, CA, US (lat 39.2790°, long -121.1127°, altitude 670 metres) 13.9°F-13.9°F
K9JM26.4 milesSouthwest Grass Valley, CA, US (lat 39.1133°, long -121.0522°, altitude 700 metres) 11.1°F-14.2°F
GW025435.7 milesEast Incline Village, NV, US (lat 39.2565°, long -119.9823°, altitude 2074 metres) 1.2°F3.0°F
FW935437.1 milesEast Verdi, NV, US (lat 39.5238°, long -119.9975°, altitude 1497 metres) 8.2°F-0.8°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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