grantcarruthers
Well Known Member
I'm looking at a XC for Tuesday night (5 days out) and had a semi-interesting question pop up and wonder if any weather smart people can help.
Looking at a 190km or 1:15 XC flight over Indiana and Illinois possibly finishing after dark with NO ability to change launch time. And weather.com is calling for some showers and a relative humidity of 60%.
Considering ceilings ONLY for this question, is there a direct conversion from relative humidity to ceilings. At first glance 60% seems like it ought to mean fairly high ceilings (I'd be comfortable with 3000 feet over flat terrain but higher would of course be just fine)
So smart people educate away. Is relative humidity linear like temp 10 dew point 6 would be 60%. If so could I extrapolate that in this case with a overnight low of 10 C then the DP is 6, 2 degrees/1000 ft to cloud base would be ceilings of 2000 ft.
My go vs no go is completely an option as it always should be in GA, can and would drive if needed. So is there a way to guess ceilings based on temp and RH?
Thanks as always
Grant
Looking at a 190km or 1:15 XC flight over Indiana and Illinois possibly finishing after dark with NO ability to change launch time. And weather.com is calling for some showers and a relative humidity of 60%.
Considering ceilings ONLY for this question, is there a direct conversion from relative humidity to ceilings. At first glance 60% seems like it ought to mean fairly high ceilings (I'd be comfortable with 3000 feet over flat terrain but higher would of course be just fine)
So smart people educate away. Is relative humidity linear like temp 10 dew point 6 would be 60%. If so could I extrapolate that in this case with a overnight low of 10 C then the DP is 6, 2 degrees/1000 ft to cloud base would be ceilings of 2000 ft.
My go vs no go is completely an option as it always should be in GA, can and would drive if needed. So is there a way to guess ceilings based on temp and RH?
Thanks as always
Grant