Most of the forecast is on track for this weekend, aside for one little point. It appears now that a low pressure trough will lift north out of Baja and pump some extra moisture into the area Sunday.
National Weather Service forecast now calls for a chance of showers and thunderstorms on Sunday here in the Valley, mainly in the eastern portions. Thunderstorm activity will be possible certainly out in the Antelope Valley and across the mountains of the Angeles National Forest. With easterly flow aloft, some of this activity could get pushed into the Valley.
So we'll call it a 30% chance here in the eastern portions of the Valley, diminishing as you move further west. It still appears that we'll have high temperatures in the low 90s and otherwise mostly sunny skies.
National Weather Service forecasters say that any storms that do develop could contain locally heavy rain, gusty winds, and even some hail. So all the thunderstorm safety tips apply. If you have outdoor activities planned, heed nature's warning. If thunder roars, head indoors.