Had one big wind gust then rain. Just some distant thunder. A severe warning around Saginaw but we are good. The storm is already breaking up, as usual. Not much rain has fell but there are still a couple waves coming at us.
Perrot state park. Visiting friends. Rare weather pattern - extremly hot humid, then torrential down bursts, 4-5" rain, now almost jacket weather. Visited Winona, north by a few miles.
I was up in Trempealeau Friday morning doing some weed whacking for a friend. It was hot. How long are you going to be there? Sending you a PM.
Forgive me for doubting this but a 91 F dry bulb temp and 61 F wet bulb results in 14% relative humidity and a dew point of 35 F. Tried this with numerous calculators and came up with the same results. I’d say those conditions are pretty darn good for drying wood anywhere outside of the desert Southwest. The overnight temp of the stack will depend on how it is constructed and exposure to sunlight during the day. The mass will have a temperature inertia that will lag the outside temp. I agree that condensation or dew can form on the stack but with a little air flow, that condensation will be evaporated rather quickly and before a significant amount can be absorbed back into the wood. Stack temp can easily exceed the outside air temperature if it is in a sunny location. The below pic was taken on an 83 degree day. I did not take a reading on the shady side of the stack but it would be interesting to see how it compared to the OAT. This is just my opinion based on experience and a little reading. This is the Rh calculator I used. Online Humidity Calculator
Just like everything else on the old radioshack ad pages, there is probably a wifi app and sensor for that too.
Dew point and wet bulb are essentially the same or for laymen I consider them the same less latent heat of evaporation. The Op actually had 96db/69dp with an RH of 41%. Barometric pressure factors into the calculation as well but not a big factor unless at high altitude or a front is moving through. When wet bulb temps are at their lowest moisture will move from wood(think cold sublimation) I hate to talk in “relative” humidity because it’s relative to dry bulb which fluctuates greatly throughout the day- maybe 4-6hrs a day of low RH and 18-20 of high RH If you can heat the stack with sun or kiln to above wetbulb and maintain airflow the wood will dry. Once wood temps drop below or wetbulb temp increases due to surrounding air mass cooling the wood can no longer sweat or evaporate and drying will cease.