Author Topic: Monthly reports for the Northern California 2019-20 rainy season.  (Read 532 times)

elagache

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Dear WeatherCat drought watchers,

Continuing the annual tradition, here is the first report from Canebas Weather Station regarding the Northern California rainy season.  This year has not gotten off to a very good start.  After a bit of rain in September, we had no rain at all in October and no rain until the last week of November.  As a result, we are already well behind which is different than the previous two years:



We only got about 31% of a normal November and that leaves us with only 24% of a normal rainfall for the wet season thus far.  The weather pattern has changed dramatically and we are experiencing our first atmospheric river event of the year.  Only time will tell if enough rain will fall to wipe out the present shortfall.

Oh well, Edouard 

P.S. I'll do the monthly climate predictions tomorrow.  I'm still struggling to catch up after all the Thanksgiving and weather-related chores.

elagache

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December (Re: Monthly reports for the North CA 2019-20 rainy season.)
« Reply #1 on: December 31, 2019, 12:15:42 am »
Dear WeatherCat drought watchers,

The forecast is for no more rain through the end of the year, so I can accomplish this posting a bit early.  December was the first wet month this season.  Although nothing extreme, we received 120% of the benchmarks I have been using for these graphs:



Alas that only made a modest dent in the precipitation shortfall.  We are now only up to 54% of rainfall we would expect to get by the end of December.

Taking a dose of my own medicine, I have been using this data as my basis for rainfall:

https://www.idcide.com/weather/ca/orinda.htm

The data is actually coming from Berkeley somewhere, at least 5 miles away from our house.  I just noticed that the average rainfall total for November seems unreasonably high at 3.62".  The 10 year average of my station data is 3.10" which seems closer to the ballpark.  I have been concerned about this data almost since I've found it, but I've never found anything better.

Oh well, Edouard 

elagache

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January (Re: Northern California 2019-20 rainy season.)
« Reply #2 on: January 30, 2020, 10:08:48 pm »
Dear WeatherCat drought watchers,

The last chance for rain has come and gone for January, so I can tally up the numbers to assess the Northern California rainfall situation.  Unfortunately, the overall trend continues as the graph shows:



It was nonetheless a peculiar January.  We had one more rainy day than the 10 year station average.  But all but one of those storms were weak.  As a result, the conditions were cold and miserable, but there was no precipitation benefit for the inconvenience.  We ended up with only 40% of the nominal normal rainfall for January.  That was enough to keep up at 54% for the rainy season to date.  At least the region remained wet for the month, so I didn't have to water.

Such are da' conditions that prevail . . . . . . . 

Edouard

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Re: Monthly reports for the Northern California 2019-20 rainy season.
« Reply #3 on: February 04, 2020, 06:39:15 pm »
Edouard,

Your "Monthly and Cumulative Precipitation" report is  exactly what I'd like to do here. How can I reproduce that with my data?

--grand

elagache

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Done manually with a spreadsheet. (Re: Monthly reports)
« Reply #4 on: February 04, 2020, 10:38:18 pm »
Dear Grand and WeatherCat precipitation "bean counters."

Your "Monthly and Cumulative Precipitation" report is  exactly what I'd like to do here. How can I reproduce that with my data?

All I've done is created an Excel spreadsheet that I update manually at the end of each month.  I believe monthly updates are sufficient.  I then create an image that I display on my weather website.  As mentioned elsewhere, I don't have a particularly trustworthy source of "normal precipitation values."  I don't know if you can find a report of precipitation that goes back far enough and is close enough to you to be meaningful.

I can attach a copy of the spreadsheet if that would help, but you might be able to come up with this on your own.

Let me know, . . . . .

Cheers, Edouard  [cheers1]