DISCUSSION: As a weak low-pressure system slowly emerges off of the Eastern Pacific Ocean and slowly tracks to the northeast with time, increasing amounts of deep-layer moisture will gradually fill into many parts of the Southwestern United States. As this gradually occurs, the combination of variable terrain coupled with increasing East Pacific moisture will promote favorable conditions conducive for heavy rainfall. Thus, due to the inherent factor characterized by terrain-based enhancement of precipitation (scientifically referred to as orographically-enhanced precipitation). Thus, this will also promote flooding and potentially flash flooding threats; particularly within regions which are located at lower elevations (e.g., town/cities positioned within valleys adjacent to more elevated mountains/plateaus). To learn more about other high-impact weather events from across North America, be sure to click here!