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RISThe Single Air Mass Disturbance and Precipitation Characteristics at San Francisco
Publisher: American Meteorological Society
Abstract: Precipitation in California is generally associated with frontal systems. The author's observations suggest that although the three major frontal cyclone categories are responsible for the bulk of the annual precipitation ...
Convective and Rotational Parameters Associated with Three Tornado Episodes in Northern and Central California
Publisher: American Meteorological Society
Abstract: 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 ...
A Supercell Thunderstorm with Hook Echo in the San Joaquin Valley, California
Publisher: American Meteorological Society
Abstract: This study documents a damaging supercell thunderstorm that occurred in California's San Joaquin Valley on 5 March 1994. The storm formed in a ?cold sector? environment similar to that documented for several other recent ...
An Analysis of a Mesocyclone–Induced Tornado Occurrence in Northern California
Publisher: American Meteorological Society
Abstract: One documented F2 tornado and several other unconfirmed tornadoes were reported in California's Sacramento Valley on 24 September 1986. The synoptic pattern which occurred that day was one long-recognized by California ...
Funnel Clouds in the San Joaquin Valley, California
Publisher: American Meteorological Society
Abstract: The authors observed a relatively rare funnel cloud in the northern San Joaquin Valley, California on 21 March 1987. The pattern which occurred in California on that day was similar to that observed with other recent severe ...
Shear Parameter Thresholds for Forecasting Tornadic Thunderstorms in Northern and Central California
Publisher: American Meteorological Society
Abstract: 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 ...
An Analysis of the 7 July 2004 Rockwell Pass, California, Tornado: Highest-Elevation Tornado Documented in the United States
Publisher: American Meteorological Society
Abstract: his manuscript documents the tornado in the Rockwell Pass area of Sequoia National Park, California, that occurred on 7 July 2004. Since the elevation of the tornado?s ground circulation was approximately 3705 m (~12 156 ...
First WSR-88D Documentation of an Anticyclonic Supercell with Anticyclonic Tornadoes: The Sunnyvale–Los Altos, California, Tornadoes of 4 May 1998
Publisher: American Meteorological Society
Abstract: On 4 May 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). The parent thunderstorm was anticyclonically rotating and produced tornadoes ...
Terrain Influences on Synoptic Storm Structure and Mesoscale Precipitation Distribution during IPEX IOP3
Publisher: American Meteorological Society
Abstract: The influence of topography on the evolution of a winter storm over the western United States and distribution of precipitation over northern Utah are examined using data collected during the third intensive observing ...
The Cool-Season Tornadoes of California and Southern Australia
Publisher: American Meteorological Society
Abstract: Examples of cool-season tornadic thunderstorms in California and southern Australia are examined. Almost one-half of the reported Australian tornadoes and the majority of those in California occur in the cool season. It ...