Flood Detection / Intensity Maps from Recent Heavy Precipitation in California

January 11, 2017

Flood Detection / Intensity Maps from Recent Heavy Precipitation in California

Northern and Central California are under flood threat from an "atmospheric river" in the Pacific.  Some flooding has already occurred.  Rainfall forecasts below show a pattern extending from ocean and the effect of orography.  A forecasted flood pattern from GFMS for Sat., Sun. and Monday is shown in next three figures. The last chart shows forecasted streamflow on American River upstream from Sacramento (near Fair Oaks streamgauge, 38.57N, 121.36W) showing very high values peaking on Monday, but with continuing high values after that (75 cu. m/s is flood threshold at this point).

GFMS flood detection map from January 8th 2017

GFMS flood detection map from January 8th 2017

GFMS flood detection map from January 9th 2017

GFMS flood detection map from January 10th 2017

GFMS Streamflow map from January 2017

Data Sources: