HADS Information for OSNA2 in West Fork Olsen Bay Creek Near C, AK, United States Of America (site inactive)

The following information is known about OSNA2. 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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For development purposes only
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For development purposes only
Sorry, we have no imagery here.
OSNA2
KL1IO
FW7973
KL1V-13
CW6739
CW3684
CW6840
GW0549
KL7GG
EW1088
GW3116
FW6259
EW9414
KD7RF
ERTA2
GW5830
FW1557
CW3017
GW2748
CW1074
FW8317
GW2685
FW8205
GW5352
CW4713
FW2072
GW2827
GW1107
DW5765
EW9311
FW4010
EW8346
EW2801
EW6470
CW9316
FW8930
FW8478
KTUA2
KL3RR-2
EW0271
GW4822
CW0650
EW8287
CW3281
GW4901
EW6467
GW0412
FW2842
DW2174
HBHA2
CW4591
KC7FWK-13
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Registered Location

Latitude: 60° 45' 41" N (deg min sec), 60.7614° (decimal), 6045.68N (LORAN)
Longitude: 146° 10' 20" W (deg min sec), -146.1722° (decimal), 14610.33W (LORAN)
Elevation: 15 metres (49 feet) -- validated against 16 metres (52 feet) from Geonames
Location: West Fork Olsen Bay Creek Near C, AK, United States Of America
Borough: Valdez-Cordova, AK
Forecast Offices: Anchorage (AFC), Fairbanks (AFG), Juneau (AJK)

The site location should be at the mark shown -- or very close. Clicking within the map area (or you can drag the 'OSNA2' 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 2 data sources. 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 osna2@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 2025-03-15.

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  

Temperature

  24 hours  Day time  Night time
Average temperature error1.9 °F1.3 °F2.3 °F
Error standard deviation1.5 °F1.5 °F1.4 °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 100% 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.

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: Anchorage (AFC),Fairbanks (AFG),Juneau (AJK) .

SiteDistanceLocationBarometerTemperatureDewpoint
FW797391.1 milesNorth Copper Center, AK, US (lat 62.0198°, long -145.3638°, altitude 395 metres) 8.3°F
KL1V-13101.1 milesWest Girdwood, AK, US (lat 60.9620°, long -149.1450°, altitude 39 metres) 0.9°F
EW1088117.4 milesNorthwest Palmer, AK, US (lat 61.6250°, long -149.2047°, altitude 131 metres) -1.4°F
GW3116117.5 milesWest Anchorage, AK, US (lat 61.2467°, long -149.5322°, altitude 811 metres) -8.6°F
KD7RF119.2 milesNorthwest WASILLA, AK, US (lat 61.6405°, long -149.2487°, altitude 159 metres) -0.6°F
ERTA2119.3 milesWest Eagle River Kantishna, AK, US (lat 61.3188°, long -149.5430°, altitude 177 metres) 1.8°F
CW1074121.9 milesNorthwest Wasilla, AK, US (lat 61.6190°, long -149.3690°, altitude 136 metres) -1.2°F
FW8205122.7 milesWest Anchorage, AK, US (lat 61.0713°, long -149.7653°, altitude 300 metres) -3.4°F
GW5352123.1 milesWest ANCHORAGE, AK, US (lat 61.2138°, long -149.7213°, altitude 101 metres) 2.4°F
FW2072123.2 milesWest Anchorage, AK, US (lat 61.1135°, long -149.7657°, altitude 234 metres) -0.2°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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