Davis high gust

[DaveNZ]

Hi Steve,

Just letting you know that your code to read the daily high gust from the Davis console in case of a missed reading seems to work just as intended. Just one day after I upgraded to the beta version a strong gust was missed; it did not appear in the monthly log but it appeared in the Cumulus daily extremes.

Cheers!

[steve]

Just one day after I upgraded to the beta version a strong gust was missed; it did not appear in the monthly log but it appeared in the Cumulus daily extremes.

That's good, but note that a high gust doesn't necessarily appear in the monthly log anyway, regardless of whether it was picked up in the 'normal' way, or because of the change I did recently.

[DaveNZ]

That's good, but note that a high gust doesn't necessarily appear in the monthly log anyway, regardless of whether it was picked up in the 'normal' way, or because of the change I did recently.

I can't recall seeing this happen before - when could it occur? I am using 1-minute archive interval by the way.

[steve]

Only if you were using a Cumulus log interval of more than 10 minutes (assuming the default interval for 'recent max gust').

[Touchtone]

I have the latest beta version of Cumulus set for 30 minute logging & it always picks up max wind gusts even though I don't have it running all the time.

[steve]

I have the latest beta version of Cumulus set for 30 minute logging & it always picks up max wind gusts even though I don't have it running all the time.

It will always get (and log) peak gusts if they occur in station logger data.

When running live, it can miss peak gusts completely because the Davis DLL doesn't return the readings quickly enough to catch every reading. With the modification I made in 1.9.4, it periodically reads today's high gust value from the console (but only if you use a midnight 'rollover') so that at least today's high value is correct. When today's high gust is caught by this method (and it was missed by the normal method), it will never appear in the monthly logs.

Even if a peak gust value is caught by the normal method, it won't necessarily appear in the monthly log file if you have Cumulus set to a log interval of 30 minutes, because the 'recent max gust' interval is (assuming the default setting) 10 minutes.