I wonder if you take cloud base and the humidity values to determine if you have fog. If the cloud base is low and you have high humidity, then one could speculate that fog is imminent.
Any meteorologists can weigh in? On Tue, Aug 31, 2021, 4:19 PM Greg Troxel <g...@lexort.com> wrote: > > František Slimařík <xslim...@gmail.com> writes: > > > I got question for hardcore meteorologists here. Is it possible to > detect > > fog based on classic meassured values like temperature, humidity, > preasure, > > etc? > > Logically I would say fog appears when dew point equals current > > temeperature but I guess it will not be so easy. Fogs didn't appear here > > this year in my locality so I am waiting for autumn to start with > > observations. > > Good question, but my impression is that it is really difficult to > measure humidity above 95%. I more or less have the impression that > fog happens when temp/dewpoint are about the same and the temperature > falls. > > I think you need a fog sensor that actually measures impaired light > transmission. Surely there is a norm for measuring that already. I > need one too, right after I build a seismograph. > > -- > You received this message because you are subscribed to the Google Groups > "weewx-user" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to weewx-user+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/weewx-user/rmilf4h2wq5.fsf%40s1.lexort.com > . > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/CACC0i0wLzFDsK5i6iaNZ_DNgpuh__TpTZbXAF4a4G6NDyobHog%40mail.gmail.com.
