Downslope Windstorms - RAL - UCAR

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Subcritical case Subcritical case Fluid thins and accelerates as it crosses top of obstacle, reaches maximum speed at crest Schematic from Durran (1990)
Hydraulic jump case Hydraulic jump case Flow transitions from subcritical to supercritical at top of obstacle, potential energy is converted to kinetic energy over the entire barrier Figure from Long (1953a) Schematic from Durran (1990)
Page 1 and 2: Downslope Windstorms Downslope Wind
Page 3 and 4: Naming conventions and Naming conve
Page 5 and 6: A few notes on the Chinook A few no
Page 7 and 8: Windstorm Damage Windstorm Damage
Page 9 and 10: Figure from Kuettner and Lilly (196
Page 11 and 12: Composite soundings at onset of Com
Page 13 and 14: Observations from the 11 January Ob
Page 15 and 16: Figures from Lilly (1978)
Page 17 and 18: Downslope Windstorm Downslope Winds
Page 19: Supercritical case Supercritical ca
Page 23 and 24: General development General develop
Page 25 and 26: Other forecast factors Other foreca
Page 27 and 28: RAMS Model Simulation Figures from
Page 29 and 30: Fort Collins Windstorm Climatology
Page 31 and 32: FC Windstorm Climatology, cont’d
Page 33 and 34: Wind trace of windstorm at Fort Col
Page 35 and 36: Rotors Rotor: a region of reversed
Page 37 and 38: Rotor observations from Sierra Roto
Page 39 and 40: Figure from Grubiši and Lewis (200
Page 41 and 42: Rotor formation, cont’d Rotor for
Page 43 and 44: Figure from Doyle and Durran (2004)
Page 45 and 46: References, Cont’d Hamann, R. R.,
Page 47: References, Cont’d Raphael, M. N.

Downslope Windstorms - RAL - UCAR

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