|Yesterday's Salt Lake cloud storm at 6 PM MDT 10 Oct 2011. Note the |
ragged cloud base and how the high peaks of the Oquirrhs are obscurred.
|A scary sky over the Garner Funeral Home. A harbinger of things|
to come for Halloween?
Later in the evening, rain began to fall across the valley. This occurred as precipitation continued to cool and moisten the low levels. Typically when this occurs, the temperature and dewpoint converge on something known as the wet-bulb temperature. Evidence for this happening is apparent in the sounding as below the stable layer the temperature and dewpoint traces sit right along the moist-adiabat that roughly represents the wet-bulb temperature trace within the afternoon convective boundary layer (see thin blue line). Indeed, note how at KSLC the temperature fell to 52F and the dewpoint rose to 45F during the evening, approaching the surface wet-bulb temperature in the sounding above.