Tropical Storm Paine won’t make landfall in the Baja Peninsula until early Wednesday morning, but the southwest US is already feeling its effects. A low pressure system off the southern California coast is pushing tropical moisture into southern California and Arizona since the beginning of the week. San Diego saw record rainfall of 0.01″ on Monday, their first measurable rainfall since the end of May. Much more is on the way through the middle of the week.
There are no flood related watches or advisories in effect. This is a fast moving system with the rainfall spanning several days. In a flash flood scenario, you would expect slower moving storms with heavier pockets of rainfall. Cloudy conditions are forecast with steady light rain through Thursday. At most, rain will be moderate at times. Rainfall totals will be up to 1 – 2″, favoring higher terrain.
For WeatherNation, Meteorologist Karissa Klos.