Of course, we've seen tomorrow's forecast! We're kind of obsessed with the weather, to be honest. Here's the thing, though: sometimes "rain or shine" turns out to mean "raging torrents of water" and sometimes it turns out to mean "someone turned the sun up to 11." Those are the breaks. (Interestingly, an umbrella is appropriate for both situations.)
So we'll be out there, just like we are every Wednesday and Saturday, 9AM-2PM, with shaved ice, smoothies, and all the cold drinks we can get our hands on. You'll still want food and drinks, too, and you probably need to get some new books as well. OBTW those donuts will travel just fine.