Phil Bothwell's ADAP (NWS SR-114) arrives in 1985 (from TOP).
Watched hourly ADAP charts for May 7, 1986 Canadian, TX F-3.
A few base charts selected by spring season of 1987. STA, SMC, SSL and SSC.
Charts watched through 18 TX, KS and CO Tornadoes 1987 - 1990.
Installed and working at WSO Dodge City by fall of 1989.
Using this and other data, noted empirical values, composited the charts and defined
the threat area.