Friday, January 18, 2019

CA rains: follow-up on January 18th

I am not in a position to provide a detailed follow-up to the post I wrote on January 16th where I wrote about rains continuing on burn scars in California with various Flash Flood Watches being issued by some of the Weather Forecast Office in California. I do know that there was significant rainfall in California as you can see from the map from the NWS California Nevada River Forecast Center (CNRFC) that they posted on their Facebook Page on January 18th.


Here is a map that I obtained from the CNRFC on January 18th. The orange circles indicate River gages that are at monitor stage.

Obtained at 12:08 PM PST on January 18, 2019 from https://www.cnrfc.noaa.gov/
What is monitoring stage? Here is an example of data as of January 18th at 8:13 AM PST from a gage on the Sacramento River at Ord Ferry just southwest of Chico, CA. The gage is located in the Sacramento River National Wildlife Refuge in Butte County, California, go to the link in preceding sentence and scroll down to see a map.

Obtained on January 18, 2019 at 12:34 PM PST from https://www.cnrfc.noaa.gov/graphicalRVF.php?id=ORFC1

The dotted orange link in the above graphic is the bottom of the monitor stage. The data is revised several times a day so what you see if you go the url will be different from what is displayed above.

I do know from reading storm reports from the NWS San Diego whose storm report may be found here ,and the NWS Hanford CA (their storm report is on this website) that there were several reports of flash flooding and debris flows. I do not if there was any property damage from these flash floods and debris flows.  I know from the CBS station in Los Angeles that residents in and near the Holy burn scar in the Lake Elsinore area of Riverside County were under evacuation orders on January 17th, go here to read the article. Mandatory evacuation were downgraded to voluntary orders yesterday. I believe that the voluntary evacuation orders were lifted later on January 17th.

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