The National Weather Service issued an updated severe thunderstorm warning at 5:59 p.m. on Saturday in effect until 6:30 p.m. for Clackamas and Marion counties.

The storms may bring quarter-sized hail (1 inch).

"At 5:58 p.m., a severe thunderstorm was located near Timothy Lake, or 13 miles southwest of Government Camp, moving north at 35 mph," according to the weather service. "Damage to vehicles is expected."

The warning is for Timothy Lake and Three Lynx.

According to the weather service, "For your protection move to an interior room on the lowest floor of a building. Prepare immediately for large hail and deadly cloud to ground lightning. Seek shelter inside a well-built structure. Stay away from windows. Continuous cloud to ground lightning is occurring with this storm. Move indoor

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