What is the approximate base of cumulus clouds when the surface air temperature at 1,000 feet MSL is 70 degrees Fahrenheit and the dew point is 48 degrees Fahrenheit?

To determine the approximate base of cumulus clouds, we can use the temperature and dew point given in the question. The base of cumulus clouds can be estimated using the difference between the temperature and dew point, which helps indicate how much moisture is present in the air and how far cooling air must rise before it becomes saturated.

In this scenario, the surface air temperature is 70 degrees Fahrenheit, and the dew point is 48 degrees Fahrenheit. The difference between these two values is 22 degrees. Generally, it is estimated that the base of cumulus clouds is approximately 1,000 feet for every 4 degrees of temperature difference between the air temperature and dew point.

To find the height of the cloud base, you divide the temperature difference by the rate at which the cloud base rises:

1. Calculate the number of degrees: 70°F - 48°F = 22°F

2. Divide the temperature difference by 4°F/1,000 feet to find the approximate height in thousands of feet:

22°F / 4°F = 5.5

Thus, for every 1,000 feet of altitude for this difference, you multiply by 1,000 feet. Therefore, the base of the cum