METEOROLOGIST JEFF HABY
A UVV max is a region of greatest uplift due to dynamic lifting mechanisms such as frontal convergence, warm air advection, low pressure
convergence, and upper level divergence. It is a region that has the greatest combination of lifting mechanisms since typically multiple
lifting mechanisms will interact with each other. The importance of UVV is that it indicates where precipitation may be more likely or
heavier. Typically, it is low level lifting mechanisms that provide the most intense lifting. Of these, warm air advection is often
the strongest lifting mechanism present. Convergence along a frontal boundary or into a low pressure system can also be strong.
The image below shows a UVV max over Mississippi. The trough axis can be seen going through Arkansas. Often the greatest lifting
will occur on the right side of a trough axis. This is where lifting from warm air advection will be prevalent. Convergence along
and out ahead of a cold front is often found here also. Upper level support from positive vorticity advection and jet streak divergence
is often found to the right of a trough axis also.
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