Yesterday at dusk I looked out my window NW of me, saw dark clouds, on radar watched them quickly become a very small very narrow rain cell that came here and stayed....very heavy rain. I got 3.6 inches in my gauge, containers every where filled! As I suspected, the iron oxide concrete colorant I'd used recently to stain my carpeted driveway mulch did not rinse off. I have 2 gallons of food grade potassium chloride getting ready in my shower water solar heater, will spray a second time the nut sedge coming up through the carpet. This intense rain storm looked like it hit a very small area in Tampa.