Add Yahoo as a preferred source to see more of our stories on Google. SHREVEPORT, La. (KTAL/KMSS) – It appears that the influence of upper-level high pressure is beginning to increase over the ...

An upper level low is low pressure that starts higher up in the atmosphere. Imagine you're in a 10 story building and low pressure typically starts on the 5th floor. In the case of an upper level low, ...

Rainy weather patterns often setup in D.C. Metro and sometimes the blame points to an upper level low pressure system. Sounds like a lot of science jargon that may have you scratching your head, but ...