It was the combination of the remnant moisture of Tropical Storm Alberto and the very hot temperature that really set off the thunderstorms. We had triple digits yesterday.
Quite a bit of cloud-to-ground lightning activity at present with elevated t-storm cells across San Joaquin Valley heading into Sierra foothills. Not much ignition potential in irrigated farmland, but could see some fire starts in grass/brush in foothills.
Tropical Storm Alberto impacted Mexico last week, and the remnant moisture pushed into California on Monday, mostly delivering high clouds across the state but also bringing some scattered showers and thunderstorm activity.
We mostly saw a lot of what's known as virga. It's where rain from the clouds may not be reaching the ground.
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