TROPICAL STORM OCTAVE On Oct. 2, 1983, Tropical Storm Octave followed a similar path, but did not break up so soon. It dropped up to 15 inches of rain in 24 hours in southern Arizona and northern Sonora, and devistated the region. See: Smith, W. 1986. The effects of Eastern North Pacific Tropical Cyclones on the Southwestern United States. NOAA Techn. Memorandum NWS WR-197. TROPICAL STORM OLIVIA Oct. 11, 2000 © The Weather Channel http://www.weather.com This image shows heavy precipitation in the Southwest as red and yellow colors. The source of the moisture is Tropical storm Olivia, the yellow & red circle west of Baja California in the upper-left image. Ordinarily, tropical storms in the Eastern Pacific are steered westward - away from land - by the East Pacific High, but on Oct. 10-11, 2002, a cold front from the Pacific pushed Tropical storm Olivia eastward across Baja California, where it collided with warm air circulating northwestward around the Bermuda High. The atmospheric moisture from Olivia was propelled northeastward along the front between the two air masses and produced heavy precipitation in southern Arizona, New Mexico, and Colorado. It produced 3-5 inches of rain in Tucson. TROPICAL STORM MARTY September 23, 24, 2003