A weak Pacific storm dropped light but beneficial rain across much of San Diego County Wednesday and may be followed by a much bigger system that could arrive late Sunday night, the National Weather Service says.

Forecasters say the Oceanside area received nearly 0.50 inches of precipitation early Wednesday, but most communities reported barely 0.20 inches. The rain is considered beneficial because it hasn’t fallen hard enough to cause flooding, and it will help tamp down the risk of wildfires.

The storm will clear off to the east by early Thursday. But air temperatures will continue to be on the cool side. San Diego’s daytime high is expected to reach 66 on Thursday, 68 on Friday and 69 on Saturday. The seasonal high is 66.

Forecasters say conditions will be dry Saturday when many Little League games get underway.

The situation will start to change Sunday when a low-pressure system sinks south. Computer models say it’s possible that San Diego County will receive 1 to 2 inches of rain Monday through Wednesday. Forecasters stressed that those figures are preliminary.