Weather Quiz

Thermals are updrafts in convective currents dependent on solar heating. A temperature inversion would result in stable air with very little, if any, convective activity.

The entry RAB35 means that rain began 35 minutes past the hour.Answer (A) is incorrect because mist is reported as BR. Answer (C) is incorrect because there is no format for reporting an altimeter change in a METAR.

Wind direction always changes across a front.Answer (B) is incorrect because precipitation does not always exist with a front. Answer (C) is incorrect because the stability on both sides of the front may be the same.

When air near the surface is warm and moist, suspect instability. Surface heating, cooling aloft, converging or upslope winds, or an invading mass of colder air may lead to instability and cumuliform clouds. Answer (B) is incorrect because cooling from the air below would increase the stability of the air. Answer (C) is incorrect because an increase in water vapor will result in a decrease in stability.

Wind shear is an invisible hazard associated with all thunderstorms. Shear turbulence has been encountered 20 miles laterally from a severe storm.Answer (A) is incorrect because precipitation static is not considered a hazardous atmospheric phenomenon. Answer (C) is incorrect because showery precipitation is a characteristic of thunderstorm activity.