Upslope Fog
As the parcel ascends up the slope, it expands and cools to the dew point
Upslope fog/clouds then form
Need winds to move air up the slope
Need a slope!
data example:
QUESTIONS FOR THOUGHT:
1. On each of three different days over the Gulf of Mexico, the air has the following temperature and dew point:
- T=40 ºC, Td=5 ºC
- T=40 ºC, Td=35 ºC
- T=10 ºC, Td=-5 ºC
On which days will upslope fog form at Denver, CO? Show work.
2. If evaporation of water vapor from the ground to low levels in the atmosphere occurs at a rate such that the dew point temperature of a parcel of air increases by .2 ºC per hour and it takes 1.5 days for a parcel with T=25 ºC and Td=0 ºC to travel from Illinois (elevation=1000') to Denver (elevation=5280'), will fog form in Denver? Show work.
