A meteorologist friend of mine, Jan Null, has been keeping tabs on Winter Storms for some time. He’s developed something called the Bay Area Storm Index (BASI) which he uses to calculate the intensity of the storm by combining susatined wind, peak gusts, and rain totals. By his reckoning, this storm today rates a 9.0 on a scale of 1-10.
This is based on:
SF Downtown Rainfall = 2.01 as of 2 PM (see http://www.wrh.noaa.gov/mesowest/getobext.php?wfo=&sid=SFOC1&num=48 )
SFO Max Sustained Wind = 46kts at 1559Z = 53 mph at 7:59 AM (see http://www.wrh.noaa.gov/mesowest/getobext.php?wfo=mtr&sid=KSFO&num=48&raw=1&dbn=m)
Max Gust Below 1500’= Angel Island 76 kts at 2009Z = 87 mph at 12:09 PM (see http://www.wrh.noaa.gov/mtr/versprod.php?pil=OMR&sid=DAR)
That makes this the strongest storm since a 9.0 December 16, 2002 and only the 12th storm of 9.0 or greater since 1950. See the BASI archive http://ggweather.com/basi_archive.htm
Locally in Chico as of 3PM we have 1.74 inches of rain from this storm, sustained winds of 41mph, and a peak wind of 66mph.
In Redding, Shasta Dam had 4.92″ of rain, with Redding Fire Station at 1.56 inches. Peak wind gust was 82 mph!
Above Paradise, Stirling City got 6.82 inches of rain in the last 24 hours and its still coming down. They’ll likely see it go beyond 7 inches in 24 hours with a storm total about 10 inches.