As Southern California approaches the weekend, residents are experiencing what could be the coldest morning of the season, with temperatures dropping into the teens in the higher mountain valleys around Big Bear. As the National Weather Service San Diego reported, many inland valleys felt an unexpected chill, dipping into the 30s and prompting a Frost Advisory for the High Desert from 1 AM to 9 AM. Peak temperatures today are expected to be slightly warmer but still below average, ranging from 66 to 78 across various regions, including coastal areas and the low desert.

According to the same source, a low-pressure trough continues to write Southern California's weather narrative, keeping the region cool and setting the stage for the weekend's anticipated light to moderate rain. Despite the low certainty on rain totals and timing, it is clear that more details will emerge in the days to come.

The NWS's forecast discussion paints a reasonably straightforward picture of All Hallows Eve and the days leading up to it. Conditions are expected to be fair but calm, with the possibility of patchy coastal clouds. Temperatures are anticipated to remain several degrees below average during the day, while nights will be slightly warmer, preventing an excessive plunge from current conditions.

In terms of aviation, the Marine sector can anticipate fair skies and smooth sailing, with no hazardous weather on the horizon through Saturday. Meanwhile, Skywarn activists might remain on standby as the weather service encourages spotters to report significant conditions, though no activation has been requested. As Southern California prepares for the impending shift in weather, the message is clear – stay informed as updates roll in and plan accordingly for a potentially wet weekend.