That's a good point. So, I decided to look up the stations and I found this with Chat GPT.
https://madis-data.ncep.noaa.gov/MadisSurface/
I was able to go to the stations we were discussing. (Not Canada).
First the CL station here.
Chat GPT reports here interesting FF by wind speed:
"In meteorological reports, "FF" typically stands for "Fahrtwind" (German for "apparent wind" or "travel wind"). In this context, "FF-Wind Speed" likely refers to the measured wind speed at the location.
So, "FF-Wind Speed" indicates the wind speed measurement, which in this case is 9.01 mph."
There are two measurements here. I believe that those are the measurements for wind on this station. So the Dashed line is the wind speed observed. Now for more interesting information from Chat GPT. I asked what QC and the "S" and "C" is.
"ChatGPT
The last column labeled "QC" stands for "Quality Control." This column indicates the quality control status of the data, ensuring that the measurements meet certain standards or criteria.
In the provided data:
"S" likely stands for "Suspect" or "Suspect Quality," meaning that the data has passed initial quality checks but may still require further verification.
"C" likely stands for "Checked" or "Correct," meaning that the data has been thoroughly reviewed and is confirmed to be accurate.
For example:
Wind Speed (FF-Wind Speed) has a "QC" value of "S," indicating the data is suspect and may need further verification.
Wind Gust Speed (FFGUST-Wind Gust Speed) has a "QC" value of "C," indicating the data has been checked and confirmed to be accurate."
Compare this to the Airport location which is Dry Creek near Corvallis.
Chat Gpt says that "V" is valid or verified. and the "Z" is for erroneous or invalid and cold be flagged.
So, checking the time is shortly after as well not exact the same. measurements are approximate close.
Now for the Airport Dry Creek, Time is Close but not exact it's reported a little bit after.
So the times are not the same exactly and the measurements are not exactly the same but very close. For the airport there is no gust measurement. Wait-- there is some.. SO umm. Maybe windy has other sources combined? or uses another source. Now I don't know why there are gusts reported on windy. It seems that windy has combined sources together.
Well I've spent enough time editing and looking at this. Well over a hour. So, I conclude that the dashed lines is probably the wind speed that is reported. Kind of a average wind speed or could be a low wind speed. Depending on the area because it seems the wind moves up and down and isn't constant. It also can vary with elevation.
Cheers if you enjoyed reading!