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2h ago

NWS Issues Flash Flood Warning as Severe Thunderstorm Hits Eastern San Diego County

Forecasters urge drivers to avoid flooded crossings to reduce the risk of deadly flash flooding.

Lightning similar to this crackled through the skies of eastern San Diego County on Monday. File photo by Ernie Cowan / For The San Diego Union-Tribune)

Overview

  • The National Weather Service issued a flash flood warning for southeastern San Diego County until 5 p.m., following torrential downpours in mountain and desert areas.
  • A separate severe thunderstorm warning for east central San Diego County ran until 3 p.m., with reported winds up to 70 mph and nickel-size hail.
  • Between 0.5 and 1.25 inches of rain had already fallen in warned zones, with life‑threatening flooding possible in creeks, urban areas, highways and low-water crossings.
  • Impacted locations included I-8 between Pine Valley and Boulevard, Alpine, Mount Laguna, Lake Morena, Pine Valley, Campo, Potrero, Barrett Lake, Dulzura and Hwy S1 near Lake Cuyamaca.
  • Forecasters expected the main storm to diminish by early evening, but said monsoonal moisture could keep heavy rainfall possible through Wednesday, with some mountain rates approaching 2 inches per hour.