When I click on Hydrologic Outlook in the weather app it says:
“Moderate to heavy rain will likely cause some urban and small stream flooding late Monday through Tuesday...
WHAT...A significant winter storm will impact the region late Monday and Tuesday, with showers lingering into Wednesday. This potent system is tapping into a very moist subtropical plume, which will allow for moderate, to periods of heavy, precipitation. Precipitation will begin in the Northern areas Monday evening, becoming moderate to heavy Monday night, then spread south across the region early on Tuesday. Rainfall totals will range from 1.25 to 2.5 inches in the valley, with foothills and mountains receiving 3 to 5 inches. Locally up to 8 inches are possible over favored peaks and higher terrain. Moderate to heavy rain will lead to rapid rises of area rivers, streams, and creeks. Localized ponding of water for low-lying or poorly drained areas as well as localized flooding is possible due to blocked drainages, and storm drains. Main stem rivers are presently forecast to remain below flood stage, but may rise above monitor stage in a few locations.
WHERE...Interior Northern California
WHEN...Monday night through Tuesday with greatest impacts expected early Tuesday. Showers will linger through Wednesday, with runoff expected to continue.
ADDITIONAL DETAILS...There is a concern for minor mud, rock, and debris flows that may occur across burn areas. In addition, strong and gusty winds are expected late Monday night and Tuesday. Debris from gusty winds may cause drainage blockages which could create a localized flooding threat. Localized ponding of water is likely in low-lying or poorly drained areas, such as freeway off ramps. No mainstem river flooding is forecast at this time, but mainstream rivers will see rapid rises, and may reach monitor stage in a few places. More storms look likely late next week and into the early part of the New Year. Please monitor the latest forecast for the most up to date weather information.”