CWOP Information for FW6299 (F6299) in Russellville, TN, US

The following information is known about FW6299. 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.
For development purposes only
Sorry, we have no imagery here.
For development purposes only
Sorry, we have no imagery here.
FW6299
EW6162
W2OBX
GW1242
FW2958
GW5942
CW5834
CW9971
GW3586
AC4JF
FW0277
DW7472
DW6569
FW9976
EW8004
EW4997
FW8829
EW8968
GW5215
GW2225
DW2921
FW1654
GW5293
KU4ME
WX4ET
GW3532
WX4KNX-13
EW2173
EW5797
FW7072
W4BBB
W4FY
KG4QWI
EW6448
W8UFO-13
FW5248
GW4530
N4WIB
GW1714
FW9490
EW8444
KD4UFD
GW3468
FW7025
EW2279
KB4UTZ
FW8431
DW2598
WB4E-13
GW3611
AC2VK-1
W4IOJ
GW0781
W7ZP
W8BUG
KD4NH
DW3435
FW2588
GW4849
FW3241
GW2712
CW5602
FW2273
FW7749
GW0114
EW5713
CW0187
FW3054
FW9022
DW5724
FW2216
FW4543
FW5750
KF4MSV
GW5691
FW7281
CW9773
FW6068
AC4VM
FW0839
GW5326
KD4YQH
CW7566
FW7007
DW7110
CW7412
FW8612
GW0151
EW5380
K0RGI
CW8285
GW1686
KJ4RDP-13
DW8032
EW0871
EW7422
GW4465
FW2087
GW0212
GW0648
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Registered Location

Latitude: 36° 15' 41" N (deg min sec), 36.2615° (decimal), 3615.69N (LORAN)
Longitude: 83° 12' 54" W (deg min sec), -83.2150° (decimal), 08312.90W (LORAN)
Elevation: 399 metres (1310 feet) -- validated against 399 metres (1309 feet) from Geonames
Location: Russellville, TN, US
County: Hamblen, TN
Forecast Office: Knoxville/Tri-Cities (MRX)
Station type/software: Davis Vantage Pro 2/Vue with Weatherlink-IP

The site location should be at the mark shown -- or very close. Clicking within the map area (or you can drag the 'FW6299' 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.

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. (There are none)

Data Status

Data has been seen on each of the last 27 analyzed days.

The last 24 hours of weather data can be viewed at Findu. This page also provides access to the raw APRS packets and various other APRS related tools.

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.

A recently received weather report from this station was

Analyze: FW6299>APRS,TCPXX*,qAX,CWOP-6:@272145z3615.69N/08312.90W_264/002g008t060r000p001P001h33b10115L....DsIP

Barometer

Average barometer error: -0.6 milliBars
Error standard deviation: 0.8 milliBars

 
MADIS
rating
MADIS rating 96% 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-2.8 °F-1.0 °F-3.7 °F
Error standard deviation4.1 °F2.7 °F4.4 °F
Worst average temperature error-7.3 °F-2.4 °F-11.5 °F
Worst standard deviation5.7 °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.

  Daytime mean error (-1.0) and night time mean error (-3.7) both large and negative
 
MADIS
rating
MADIS rating 69% QC OK
Sensor fails following checks:
L3 Spatial Consistency
 

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.

Dewpoint -- or switch to Relative Humidity

  24 hours  Day time  Night time
Average dewpoint error-0.7 °F-2.2 °F-0.1 °F
Error standard deviation2.5 °F2.7 °F2.0 °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 98% 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.

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 83% 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.

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: Knoxville/Tri-Cities (MRX) .

SiteDistanceLocationBarometerTemperatureDewpoint
W2OBX13.4 milesSouth WHITE PINE, TN, US (lat 36.0798°, long -83.2998°, altitude 335 metres) 0.4mb1.8°F-1.7°F
CW583422.4 milesWest Washburn, TN, US (lat 36.2870°, long -83.6152°, altitude 435 metres) 0.2mb0.7°F-0.8°F
EW800433.1 milesWest Plainview, TN, US (lat 36.2007°, long -83.8033°, altitude 336 metres) -0.2mb2.9°F-1.4°F
EW896834.8 milesEast Fall Branch Fire Dept, TN, US (lat 36.4118°, long -82.6190°, altitude 480 metres) -1.1mb0.3°F0.5°F
GW222535.0 milesEast FALL BRANCH, TN, US (lat 36.4267°, long -82.6208°, altitude 472 metres) -0.5mb-0.6°F0.2°F
KU4ME40.1 milesWest Andersonville, TN, US (lat 36.1908°, long -83.9285°, altitude 344 metres) -0.7mb2.0°F-1.9°F
WX4ET42.0 milesNortheast KINGSPORT, TN, US (lat 36.5357°, long -82.5417°, altitude 382 metres) 0.7mb1.3°F-1.1°F
GW353242.4 milesWest KNOXVILLE, TN, US (lat 36.0560°, long -83.9295°, altitude 340 metres) -0.0mb2.5°F-0.3°F
EW579744.5 milesEast Gray, TN, US (lat 36.4180°, long -82.4397°, altitude 473 metres) 0.4mb0.2°F1.3°F
FW707245.0 milesNortheast Kingsport, TN, US (lat 36.5550°, long -82.4935°, altitude 402 metres) 0.4mb1.9°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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