SAN DIEGO — A mild summer storm delivered scattered showers and a few flashes of lightning to the San Diego area Tuesday.
The banks of wet clouds out of the south mostly dropped insignificant traces of moisture across the county, according to the National Weather Service. As of mid-afternoon, the highest amount of precipitation, 0.2 of an inch, had come down on Volcan Mountain, meteorologist James Thomas said.
Other measurable amounts included 0.08 of an inch in La Mesa; 0.06 on Mount Laguna; 0.04 in Julian, Lake Murray and Ranchita; 0.03 in Couser Canyon and Warner Springs; 0.02 in Alpine and Kearny Mesa; and 0.01 in Deer Springs, the Granite Hills area of El Cajon and Serra Mesa.
The unsettled atmospheric conditions also sparked occasional bolts of lightning, though few reached the ground, Thomas said.
The rain was likely to taper off overnight, Thomas said. On Wednesday, however, the onset of a warming trend was expected to generate more intense thunderstorms over the mountains and deserts, creating flash-flood risks from late morning through evening.
From Thursday through Saturday, increasing high pressure will usher in near-record high temperatures, forecasters said.