METAR Information for KTVI (TVI) in Thomasville, GA, United States (site inactive)

The following information is known about KTVI. 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
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For development purposes only
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KTVI
FW6964
WD4DAN-13
CW1344
EW0402
WX4SGA
GW4374
GW2038
DW7314
K4DBC
GW5456
FW8427
GW1282
W4GHW
K4TPD-5
FW6314
FW9222
FW8097
CW5801
EW4504
FW3681
GW5930
K4AGR
GW3621
FW0059
DW7933
EW7423
FW8483
DW4542
GW0100
EW4536
FW3611
KD4MBW
CW7748
FW9406
EW6657
DW5249
GW1567
FW8543
W4GHG
KR4APM
AE5TC
KE4BTI
KN4JQB-13
N4JTC
EW9485
EW5893
FW6157
KC4JIR
FW4416
N1HQ
GW4436
Google
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Registered Location

Latitude: 30° 54' 7" N (deg min sec), 30.9020° (decimal), 3054.12N (LORAN)
Longitude: 83° 52' 52" W (deg min sec), -83.8810° (decimal), 08352.86W (LORAN)
Elevation: 80 metres (263 feet) -- validated against 71 metres (233 feet) from Google
Location: Thomasville, GA, United States
County: Thomas, GA
County warning area: TAE
Automated weather phone (AWOS-3): 229-225-4336
Observing program(s): AWOS

The site location should be at the mark shown -- or very close. Clicking within the map area (or you can drag the 'KTVI' 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 12 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 ktvi@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

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

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.

Barometer

Average barometer error: -0.4 milliBars
Error standard deviation: 0.4 milliBars

 
MADIS
rating
MADIS rating 99% 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 error1.1 °F-1.1 °F2.0 °F
Error standard deviation2.4 °F2.2 °F1.9 °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 97% 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 error1.7 °F2.9 °F1.4 °F
Error standard deviation2.3 °F2.9 °F1.9 °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 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 15% QC OK
Sensor fails following checks:
L3 Spatial Consistency
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 in your County Warning Area: TAE .

SiteDistanceLocationBarometerTemperatureDewpoint
WD4DAN-1328.7 milesEast Valdosta, GA, US (lat 30.8670°, long -83.3987°, altitude 59 metres) 0.7mb-1.3°F-3.0°F
CW134429.6 milesSouth Monticello, FL, US (lat 30.4968°, long -84.0400°, altitude 34 metres) 2.0mb-0.4°F-2.5°F
WX4SGA31.4 milesNortheast ADEL, GA, US (lat 31.1137°, long -83.4115°, altitude 80 metres) 0.2mb-0.8°F-1.1°F
GW203835.7 milesEast VALDOSTA, GA, US (lat 30.8770°, long -83.2802°, altitude 253 metres) -0.1mb-4.5°F-2.3°F
DW731436.9 milesSouthwest Tallahassee - PineyZ, FL, US (lat 30.4425°, long -84.1950°, altitude 30 metres) 0.7mb-3.5°F-6.0°F
K4DBC38.2 milesSoutheast PINETTA, FL, US (lat 30.5932°, long -83.3487°, altitude 42 metres) 0.7mb1.1°F-1.0°F
GW545639.1 milesSouthwest TALLAHASSEE, FL, US (lat 30.4467°, long -84.2692°, altitude 54 metres) 1.2mb-2.0°F-2.2°F
FW842749.6 milesNortheast Chula, GA, US (lat 31.5455°, long -83.5102°, altitude 106 metres) 1.9mb0.2°F1.1°F
W4GHW57.6 milesNorth Ashburn, GA, US (lat 31.7108°, long -83.6522°, altitude 137 metres) 0.8mb-0.6°F5.1°F
FW631470.4 milesSouthwest Panacea, FL, US (lat 29.9708°, long -84.3575°, altitude 4 metres) 0.9mb-2.9°F-8.4°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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