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CR1000, LoggerNet and CWOP


tedphill Apr 26, 2011 12:39 PM

Our agency currently has in place a CR1000, with various sensors.

We need to supply our weather information to NOAA as part of the CWOP (Citizens Weather Observation Program) where the data can be posted into MADIS.

I see references to programming for Weather Underground, but I cannot find anything that comes remotely close to CWOP.

Is there anyone out there that is posting their information from A CR1000 (or LoggerNet .dat file) to CWOP? If so, how?


IslandMan Apr 28, 2011 05:02 AM

Doesn't NOAA have the format and rules for uploading the data? If you can post a link to that I can possibly help. I currently post data to Wunderground.


GCreager Mar 21, 2012 05:29 PM

CWOP information, generally, can be found at http://wxqa.com.

Further, abstrating from the FAQ page (http://www.wxqa.com/faq.html):
7. How is the weather data coded into the data packet? When you look at examples of APRS position weather packets here, or here, the part after the longitude "E" or "W" carries the weather data as symbols followed by numbers. The underscore "_" followed by 3 numbers represents wind direction in degrees from true north. This is the direction that the wind is blowing from. The slash "/" followed by 3 numbers represents the average wind speed in miles per hour. The letter "g" followed by 3 numbers represents the peak instaneous value of wind in miles per hour. The letter "t" followed by 3 characters (numbers and minus sign) represents the temperature in degrees F. The letter "r" followed by 3 numbers represents the amount of rain in hundredths of inches that fell the past hour. The letter "p" followed by 3 numbers represents the amount of rain in hundredths of inches that fell in the past 24 hours. Only these two precipitation values are accepted by MADIS. The letter "P" followed by 3 numbers represents the amount of rain in hundredths of inches that fell since local midnight. The letter "b" followed by 5 numbers represents the barometric pressure in tenths of a millibar. The letter "h" followed by 2 numbers represents the relative humidity in percent, where "h00" implies 100% RH. The first four fields (wind direction, wind speed, temperature and gust) are required, in that order, and if a particular measurement is not present, the three numbers should be replaced by "..." to indicate no data available. Solar radiation data can also be coded into the data packet.

A specific example of a weather packet (that works; it's from my station at home) is: N5JXS>APRS,TCPIP*,qAC,THIRD:@211303z3036.33N/09617.03W_155/001g002t054P001h71b10116.wview_5_19_0

We have a site here at Texas A&M interested in reporting to CWOP. If I can help, please contact me.


WX4GPS Jan 8, 2019 09:14 PM

I have a DLD files that works for CWOP/APRSWXNET and one for WUNDERGROUND, made the whole process very easy. 

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