A weak low-pressure system will slide inland to our north this week, strengthening the onshore flow with gusty west winds, cooler temperatures, and a chance of showers. As the onshore flow increases, the marine layer will deepen enough for some light rain and drizzle across the coastal and valley areas over the next few days, mainly during the late night and early morning hours. This moisture will bank up against the lower coastal slopes and could spill into the Big Bear Valley, especially Wednesday night or Thursday morning. This may generate a few light showers or flurries across our area with little to no accumulation expected. Highs will cool to the mid-60s today, dropping into the 50s on Wednesday and Thursday, while overnight lows generally cool to the 30s, but could dip into the upper 20s on Wednesday night. If this low gets close enough, there could be some isolated elevated convection, but at this time, it looks like the low stays too far to our north. High pressure will settle back over the region by the end of the week, bringing a nice warm-up through the weekend. Also monitoring an early intrusion of monsoon-type moisture to our east, which has brought thunderstorms to much of Arizona and New Mexico. For the time being, this moisture will remain east of us, but could be drawn a little further to the west during the first week of June. Longer range continues to suggest above normal rainfall through the summer season, signaling we could have a fairly active monsoon pattern this year.