Distance Casting In Hot-Humid-Calm Conditions: Thin Air Tough Casting?

[Bianchetti Ivan]

Ivan, you need to adjust some translation of Google. By the way because i'm italian i well undestand what you are meaning. Yes i agree. The hot air on a sunny summer day certainly tends to create a convective motion by "lifting" the line as well.
Certainly with the warm air that is less dense than the cold one and with a little push upwards there can be some advantages.
Unfortunately when I write, I don't know what I am saying

[Paul Arden]

Thanks Richard - so fog is denser air, that is a real distance killer for me. I’m still unsure why dew point would be a cast killer however. It’s very interesting because by this point in the day I’m in full flow. But I lose 10-20’ and my toes get wet

It’s sun down here (almost dark) and my phone tells me it’s 25C, 98% humidity and 1008hPa. What I have never really paid much attention to is air pressure and it’s something I have to look more closely at.

Cheers, Paul

[Richard Floggwater]

Given the radiation fog description from NOAA, that’s what happens - air cools, compresses, and is therefore, denser. Looks like 1) cold calm air inside would be denser, and 2) fog in various forms can be denser than whatever “normal” air might be. That increased density would logically increase drag reducing distance casts effectiveness. Hot/thinner air - a mysterious deleterious effect. Witches north or south of 25 degrees latitude; voodoo closer to the equator I’d guess.

[Paul Arden]

Witches north or south of 25 degrees latitude; voodoo closer to the equator I’d guess.

That would explain it

There are small weather stations that connect to smartphones that are not overly expensive. If we noted the data, along with max carry and max distance then over time we would have some real numbers. Of course it would need to be the same set of casters to make it meaningful.

Cheers, Paul