I am finally posting a link with an in-depth explanation of relative humidity and dewpoint in response to an earlier request. Relative humidity is a highly variable quantity dependent on pressure and temperature. RH can be thought of as a ratio of the mass of water vapor in the atmosphere compared to what that mass would be if the atmosphere was saturated. The dewpoint (or dewpoint temperature) is the temperature that the atmosphere would have to cool to in order to reach saturation. When temperature and dewpoint are the same, the atmosphere is saturated and the RH is 100%. However, there is more to it than just this, so to avoid typing a dissertation on the subject, I’ll just refer to the link.

This is quite rare, but one of the weather balloons released by my office (Albuquerque National Weather Service Forecast office) landed back in the Albuquerque metro area hitting a motorist on the northeast side of town. Strong winds aloft usually carry these balloons and radiosondes (instruments) between 20 to 100 miles away. Upper level winds were very weak this particular day and it just so happened that the instrument was carried back over the city….and no I wasn’t the one who released this one. Our office posted a write-up of the event at this link .