Northern San Joaquin Valley Severe Watches & Warnings NOAA Weather Radio

Watches & Warnings

Flash Flood Warning
Issued: 5:12 PM PDT Mar. 22, 2018 – National Weather Service

... The Flash Flood Warning remains in effect until 215 PM PDT Friday
for Moccasin dam in south central Tuolumne County...

At 500 PM PDT, local authorities have reported that water levels
have decreased at the Moccasin dam and it is no longer in imminent
danger of failing.

However, a risk of potential failure still exists. The dam owner
will closely monitor the situation over night. Evacuations of the
Fish Hatchery and powerhouse remain in effect. Therefore, the Flash
Flood Warning will remain in effect.

Local authorities will re-evaluate conditions at the dam Friday
morning. An update will be issued after the evaluation.

Precautionary/preparedness actions...

A Flash Flood Warning means that flooding may occur.
Portions of Highway 49 were washed out near the Moccasin dam. Check
caltrans for Road updates.

Lat... Lon 3786 12032 3782 12028 3780 12025 3778 12031
      3784 12039

Hydrologic Statement
Issued: 9:36 PM PDT Mar. 22, 2018 – National Weather Service

Forecast information for
Cosumnes river near McConnell.
* At 9:15 PM Thursday the stage was 39.8 feet.
* Forecast to rise above monitor stage of 40.0 ft late this evening
then forecast to rise to near 42.0 ft early tomorrow morning then
forecast to recede to near 40.5 ft late tomorrow evening.
* Flood stage 46.0 ft
* monitor stage 40.0 ft
* impact... near 39.0 feet, the Cosumnes river overflow channel begins
to flow.


Lat... Lon 3833 12147 3848 12133 3832 12124 3823 12140