The Influence of the Rocky Mountains on the 13–14 April 1986 Severe Weather Outbreak. Part II: Evolution of a Prefrontal Bore and Its Role in Triggering a Squall Line

摘要: Abstract In this paper, Part II of a series, the evolution prefrontal bore on leeside Rockies and its subsequent propagation initiation convection farther downstream over eastern Colorado western Nebraska are investigated. The observational evidence for sequence events was obtained from combined analyses high-resolution GOES satellite imagery Program Regional Observing Forecasting Services mesonetwork data region severe weather event that occurred during 13–14 April 1986. A 2D nonhydrostatic numerical model is used to further understand ability propagate trigger convection. Analysis mesonet indicated an internal (ahead cold front), moderate downslope windstorm, quasi-stationary hydraulic jump were generated within few hours along Iceslope as Pacific front attendant upper-level jet streak advanced o...