I'm using Weather Display with one of my stations and use the built in function to set the fog/haze conditions. It works very good. Fog conditions: * T < 10°C * 95% >= humidity * low wind or no wind * solar radiation low
Haze: * T < 13°C * 94% >= humidity * low wind, low solar I might have slightly adapted humidity threshold, I don't remember. sreda, 01. september 2021 ob 00:29:22 UTC+2 je oseba [email protected] napisala: > In general, the possibility of fog developing is when the dewpoint spread > is less then 5 degrees F. > > On Tuesday, August 31, 2021 at 6:02:58 PM UTC-4 [email protected] wrote: > >> * On 2021 31 Aug 14:35 -0500, František Slimařík wrote: >> > >> > Hi all, >> > >> > 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. >> >> I'm certainly no meteorologist! >> >> It seems we've had more foggy mornings this summer than in years past. >> Humidity has certainly been high with only a handful of stretches with >> more than a day below 50% relative humidity. >> >> Many times it seems as though warm air over cooler moist ground is >> necessary for its formation. I don't think this is a temperature >> inversion, as such, but they also seem to sometimes be quite localized >> and are related to some interesting effects. >> >> I along with other radio amateurs and possibly Greg find the effects of >> these weather phenomena on VHF and UHF radio propagation interesting. >> >> - Nate >> >> -- >> "The optimist proclaims that we live in the best of all >> possible worlds. The pessimist fears this is true." >> Web: https://www.n0nb.us >> Projects: https://github.com/N0NB >> GPG fingerprint: 82D6 4F6B 0E67 CD41 F689 BBA6 FB2C 5130 D55A 8819 >> >> -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/1886d37d-d33f-4936-8197-8ed44052809bn%40googlegroups.com.
