- Flash Flood Watch for Catalina Island County, California
- Flash Flood Watch issued September 10 at 3:12PM PDT until September 11 at 5:00AM PDT by NWS
- Effective: Sunday, September 10, 2017 at 3:12 p.m.
- Expires: Monday, September 11, 2017 at 5 a.m.
...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT FOR PORTIONS
OF SOUTHWEST CALIFORNIA INCLUDING RECENT BURN AREAS...
.Southeast flow aloft will bring deep monsoonal moisture into
Southern California today and tonight, along with strong
instability. As a result, there is a chance of showers and
thunderstorms across much of the area through late tonight.
While the winds in the mid and upper levels of the atmosphere
will be rather strong, there is a high likelihood of numerous
storms moving over the same area with very heavy downpours. This
will result in the potential for flash flooding, especially in the
mountains, the Antelope Valley, the Cuyama Valley, and in recent
burn areas such as the Alamo, Whittier, La Tuna, Sand and Fish
burn areas. Rainfall rates over one inch per hour are possible
with these thunderstorms.
...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT...
The Flash Flood Watch continues for
* Locations in and around the La Tuna, Sand, and Fish burn areas
in the San Fernando, Santa Clarita and San Gabriel Valleys.
* Through late tonight
* Heavy rainfall with rates locally over 1 inch per hour is
possible across the watch area.
* Any thunderstorms that develop over the recent burn areas will
bring the risk for flash flooding and debris flows. Due to the
recent nature of the La Tuna, Sand, and Fish burn areas, they
will be especially at risk for debris flows if these high
rainfall rates occur.