Comment from NWS Hydrologist Mark Strudley

SLV River Flood Gauge

I grew up in Ben Lomond, and now live in Boulder Creek. More importantly, I am the Service Hydrologist for the National Weather Service (office is in Monterey), and my job is to forecast river conditions in the Bay Area and disseminate flood warnings and watches to agency officials, the media, and the general public. Even more informative than the USGS gaging data is the 5-day forecast for river stage (height) and flow for that same site. The River Forecast Center, a supporting branch of the NWS, simulates flow conditions at the Big Trees gage 5 days into the future. My anecdotal understanding is that flooding starts to occur around or just above a stage of 17 feet as measured at the Big Trees gage. Vicki or others, correct me if I’m wrong (the official flood stage has not really been established for that gage). At any rate, the link is here:

The projection at this point in time is that we are not slated to get into “flood territory” with this weekend’s storm, but the model is run every 6 hours, so that picture may change. Stay tuned to this site and storm.
Mark Strudley
Boulder Creek, CA
This entry was posted in San Lorenzo River and tagged , , , . Bookmark the permalink.

2 Responses to Comment from NWS Hydrologist Mark Strudley

  1. vickiwees says:

    Mark, Thanks so much for this great info! Vicki

  2. vickiwees says:

    Well, it’s 5:00 p.m Dec 23 and the river height on the San Lorenzo River just hit 20+ feet.

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