Los Angeles residents are on alert as the National Weather Service has issued a flood watch for the region, effective from 8:00 PM PDT on October 13th until 3:00 PM PDT, October 14th, due to anticipated heavy rainfall. According to the National Weather Service's extended forecast, the rain may begin tonight, potentially evolving into a thunderstorm after 11 PM, with new rainfall amounts between a quarter and half of an inch possible.
The forecast promises a 100% chance of precipitation on Tuesday with the likelihood of rainfall and thunderstorms throughout the day. With predicted new rainfall amounts between three-quarters and one inch, these conditions could pose a significant threat, particularly to regions scarred by recent wildfires. The specific areas under watch include the burn scars of San Luis Obispo, Santa Barbara, Ventura, and Los Angeles Counties – vulnerable locations like the Gifford and Madre scars, which are particularly susceptible to flash flooding and debris flows during heavy rainfall.
Residents should expect potential flooding in urban areas and regions with poor drainage systems, according to the flood watch advisory. Low-water crossings may also become dangerous due to the flooding. The National Weather Service warns of peak rates of 0.25 to 0.50 inches per hour, and even up to 1.0 inches per hour during thunderstorms or heavy showers that can reach the thresholds necessary for debris flows over the burn scars.
The Watch details that "Flash flooding and debris flows caused by excessive rainfall are possible." The situation is concerning as thunderstorms could drive intense rainfall rates over short periods, exacerbating the risk for these burn-scarred areas. Local authorities are advising those living close to the recent burn scars, or in flood-prone locales, to stay vigilant and be ready to act should flooding occur. The advisory suggests that the community monitor the latest forecasts and heed any flood or flash flood warnings issued in the coming days.
