A fast-moving rain storm is expected to arrive in the San Diego region on Tuesday night, dropping an inch of rain in most areas over the next 24 hours.
The National Weather Service office in San Diego said maximum rainfall rates would be around half an inch per hour in the mountains, but snowfall would be limited to the highest peaks.
“A low pressure system moving across southern California will bring rain from late tonight into Wednesday night with the heaviest and most widespread rainfall for Wednesday morning and early afternoon,” the weather service said.
Meteorologists said rain on the mountain snowpack will cause additional runoff into streams and creeks, increasing the threat of urban and small stream flooding on Wednesday.
Highs on Tuesday before the rain are expected to be 67 to 72 along the coast, 69 to 74 in the inland valleys, 58 to 66 in the mountains and 68 to 73 in the deserts.
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