Case Study of Thunderstorm Activity in Relation to the Low-Level Jet

The relationship between the low-level jet and thunderstorm activity in the south-central United States is examined through mesoanalysis of surface data from Weather Bureau and NSSP stations. Separate squall systems moved through Kansas and Oklahoma during the night; the systems in Kansas persisted while those in Oklahoma died out. The most likelyexplanation for this is the synoptic-scalevertical velocities in the vicinity of the low-level jet.