Aw malarky. It doesn't rain here. My bet is on some drizzle.
The national weather service report is really deceiving too. It covers some burn areas and mountain areas, and it covers the coast, but each will see different things. TStorms will stay in the mountains usually, and flash floods only really affect burn areas (which is no where near DL) because there is no vegitation to absorb and slow down the water. I think we'll be lucky to get any rain, because we do need it, but I doubt it will be a massive storm in Anaheim. Our local news forecast is barely comitting to rain, much less a nasty storm, and only a 20-50% chance of overnight showers at that, mainly Thursday night. I would bring your umbrella and don't cancel any plans, for all we know the storm might stay to the north and never even hit us, that happens all the time because when they make predictions they are focused on the LA Metro area, which is really not where Anaheim is, and half the time we never see the storm that the north end of LA gets.
I'm planning on going to the park Friday night to see Halloween simpy because everyone else will stay home because of the chance of rain!