John P. Monteverdi

TL;DR: A study of 39 nontornadic and 30 tornadic thunderstorms (composing 25 tornado events, as defined in the text) that occurred in northern and central California during the period 1990-94 shows that stratification of the stronger tornadic events (associated with F1 or greater tornadoes) on the basis of 0−1- and 0−6-km positive and bulk shear magnitudes is justified statistically as mentioned in this paper.

TL;DR: In this paper, the authors examined the properties of the typical synoptic pattern of tropical cyclone in California and southern Australia and found that the typical pattern shows an active midlatitude trough just upstream, with a strong jet streak aloft.

TL;DR: An overview of the synoptic and subsynoptic controls on three tornado episodes (seven tornadoes) in northern and central California during December 1992 is presented and compared to the "prototype" documented for the 24 September 1986 mesocyclone-induced F2 event in the Sacramento Valley as mentioned in this paper.

TL;DR: In this paper, the parent thunderstorm had supercellular characteristics and the tornado was mesocyclone-induced, and a quasi-stationary leeside trough acted in concert with local channeling effects to promote the advection of relatively moist air to the northern portions of the Valley.

TL;DR: In 1998, a pair of tornadoes occurred in the San Francisco Bay Area in the cities of Sunnyvale (F2 on the Fujita scale) and Los Altos (F1).