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2019 California and Southwest Weather Discussion Thread

2019 california weather climate
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#2251
Reg1992

Posted 26 December 2019 - 04:07 PM

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Snow level appears to have gotten down to around 3000 feet in the morning. I only got a high of 49.3 F today, one of the few sub-50F high temperatures I've recorded at this station. This morning's low temperature of 39.4 F was during the rain.

 

Santiago Peak this afternoon:

 

Attached File  sp-n-mobo-c 22.jpg   94.62KB   0 downloads

 

Mount Wilson:

 

Attached File  wilson-n-mobo-c 26.jpg   125.79KB   0 downloads


  • TT-SEA, Chris, Eujunga and 1 other like this

My personal weather station: Davis Instruments Vantage Pro 2

 

2019-2020 Season Total: 15.75" (as of 6/1/20)

 

2018-2019 Season Total: 15.84"

2017-2018 Season Total: 4.63"

2016-2017 Season Total: 15.18"

2015-2016 Season Total: 8.12"

2014-2015 Season Total: 10.09"

 

California Water Year/Rainy Season measuring period runs from July 1 to June 30.
 

 

 


#2252
Reg1992

Posted 26 December 2019 - 05:13 PM

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I'd also like to point out that we've had a higher-than-normal occurrence of abnormally cold winter storms this winter so far. We had a similarly close call back in February, but before that, the last time we had such a cold storm that brought widespread high precip amounts was in February 2011, and December 2008. Some inland areas did get actual snow during the December 2014 event, but that was not as wet or widespread.

 

Other times I recorded sub-50 F high temperatures were 2/8/13 (48.3F), 12/31/14 (46.9F), and 11/28/19 (48.2F). Season totals have already surpassed 2017-18's across most of the region.


  • Eujunga likes this

My personal weather station: Davis Instruments Vantage Pro 2

 

2019-2020 Season Total: 15.75" (as of 6/1/20)

 

2018-2019 Season Total: 15.84"

2017-2018 Season Total: 4.63"

2016-2017 Season Total: 15.18"

2015-2016 Season Total: 8.12"

2014-2015 Season Total: 10.09"

 

California Water Year/Rainy Season measuring period runs from July 1 to June 30.
 

 

 


#2253
Eujunga

Posted 26 December 2019 - 09:42 PM

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I'm back in SoCal, so all the fun must be over :)   Driving back from New Mexico today, I encountered snow falling near Seligman and again at Cajon Pass.  It rained all the way across I-40 from Needles to Barstow.  First time I can remember that happening.  The snow at Cajon Pass was amazing.  I had never seen so much snow there.  Maybe 6" on the ground with more falling, but fortunately not hard enough to close the pass.  It was closed this morning, and I had an alternate route planned starting where Hwy 95 goes south from I-40 near Kingman.  By the time I got there, SigAlert.com showed the pass as open.

 

My rain gauge shows that 3.75" fell during the 6 days I was gone.  Figures!


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Tujunga, CA (15 miles N of Downtown L.A.) - Elev. 1,860 ft.

 

Eugene, OR (5 miles SSW) - Elev. 850 ft.


#2254
Mr Marine Layer

Posted 26 December 2019 - 10:06 PM

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Despite all the rain, hills are taking a long time to completely green up here. Not sure exactly how all the dead brown stuff goes away. It must eventually be uprooted by new growth. Hopefully within a few more weeks everything will be completely green, as we have more rain in most areas than last year at time.



#2255
Eujunga

Posted 26 December 2019 - 10:16 PM

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Euro trending toward wetter GFS solution for New Year's Eve.


Tujunga, CA (15 miles N of Downtown L.A.) - Elev. 1,860 ft.

 

Eugene, OR (5 miles SSW) - Elev. 850 ft.


#2256
Reg1992

Posted 26 December 2019 - 10:36 PM

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Despite all the rain, hills are taking a long time to completely green up here. Not sure exactly how all the dead brown stuff goes away. It must eventually be uprooted by new growth. Hopefully within a few more weeks everything will be completely green, as we have more rain in most areas than last year at time.

 

They don't usually green this early, except in cases like 2004-05 where the rains started as early as October. But maybe in about a month or two, depending on how things further play out.

 

It's also possible that we get a good wildflower season in Spring, given the cold temperatures so far this winter and it hasn't been dominated by excessively warm, dry high pressure, like in some winters (such as 2017-18). January and February are still ahead, although a pattern of dry Marches prevents me from hoping for that month.



My personal weather station: Davis Instruments Vantage Pro 2

 

2019-2020 Season Total: 15.75" (as of 6/1/20)

 

2018-2019 Season Total: 15.84"

2017-2018 Season Total: 4.63"

2016-2017 Season Total: 15.18"

2015-2016 Season Total: 8.12"

2014-2015 Season Total: 10.09"

 

California Water Year/Rainy Season measuring period runs from July 1 to June 30.
 

 

 


#2257
Reg1992

Posted 27 December 2019 - 05:17 AM

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Car windows are all iced-over this morning. 35F right now.



My personal weather station: Davis Instruments Vantage Pro 2

 

2019-2020 Season Total: 15.75" (as of 6/1/20)

 

2018-2019 Season Total: 15.84"

2017-2018 Season Total: 4.63"

2016-2017 Season Total: 15.18"

2015-2016 Season Total: 8.12"

2014-2015 Season Total: 10.09"

 

California Water Year/Rainy Season measuring period runs from July 1 to June 30.
 

 

 


#2258
Eujunga

Posted 27 December 2019 - 07:23 AM

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Some road cam views to look at next summer when it's a sweltering 100ยบ:

 

Cajon Pass:

 

191227-Cajon-Pass.jpg

 

Hwy 138 at Phelan:

 

191227-Phelan.jpg

 

I-5 near Tejon Pass:

 

Screen-Shot-2019-12-27-at-7-21-50-AM.png


  • Chris and Reg1992 like this

Tujunga, CA (15 miles N of Downtown L.A.) - Elev. 1,860 ft.

 

Eugene, OR (5 miles SSW) - Elev. 850 ft.


#2259
Thunder98

Posted 27 December 2019 - 12:00 PM

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I have noticed that the low temps so far this winter has been way milder than usual while the highs has been cooler than average. It went down to 35F this morning, the coldest of the season so far.


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#2260
Reg1992

Posted 27 December 2019 - 10:44 PM

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I found a study published about the discontinuity of records and climate differences regarding the move of the official Downtown Los Angeles weather station from DWP site, to the milder USC site several miles to the southwest in 1999. Since the original DWP station is apparently still active, the study compares data and records between the DWP and USC stations from 1999 to 2014.

 

http://scholarworks.....pdf?sequence=1


  • Eujunga likes this

My personal weather station: Davis Instruments Vantage Pro 2

 

2019-2020 Season Total: 15.75" (as of 6/1/20)

 

2018-2019 Season Total: 15.84"

2017-2018 Season Total: 4.63"

2016-2017 Season Total: 15.18"

2015-2016 Season Total: 8.12"

2014-2015 Season Total: 10.09"

 

California Water Year/Rainy Season measuring period runs from July 1 to June 30.
 

 

 


#2261
Eujunga

Posted 28 December 2019 - 08:03 AM

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I found a study published about the discontinuity of records and climate differences regarding the move of the official Downtown Los Angeles weather station from DWP site, to the milder USC site several miles to the southwest in 1999. Since the original DWP station is apparently still active, the study compares data and records between the DWP and USC stations from 1999 to 2014.

 

http://scholarworks.....pdf?sequence=1

 

That's a good find.  I remember that the autumn after the Downtown LA station moved from the DWP building to USC in 1999, the LA Times published an article noting how much cooler that summer had been than the previous one.  I wrote a letter to the editor suggesting that the station move invalidated this comparison to some degree.  Not only was the letter actually published (my name in the LA Times!  Fame at last!), but they published a follow-up letter a few days later from a NWS representative whose justification -- that stations move around all the time, and the Downtown LA station had moved several times previously -- seemed weak to me.  According to the study you found, it turns out my concerns were justified after all! :)


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Tujunga, CA (15 miles N of Downtown L.A.) - Elev. 1,860 ft.

 

Eugene, OR (5 miles SSW) - Elev. 850 ft.


#2262
Reg1992

Posted 28 December 2019 - 05:46 PM

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That's a good find.  I remember that the autumn after the Downtown LA station moved from the DWP building to USC in 1999, the LA Times published an article noting how much cooler that summer had been than the previous one.  I wrote a letter to the editor suggesting that the station move invalidated this comparison to some degree.  Not only was the letter actually published (my name in the LA Times!  Fame at last!), but they published a follow-up letter a few days later from a NWS representative whose justification -- that stations move around all the time, and the Downtown LA station had moved several times previously -- seemed weak to me.  According to the study you found, it turns out my concerns were justified after all! :)

 

Looks like you were ahead of the curve back then, good that you noticed it so early on. I found another story from JPL/NASA from 2007 about it, as well as a humorous account of it from a citizen in 2008. The disparity in observations from pre-1999 and post-1999 is very apparent when viewing the daily temperature graphs for the station on climatestations.com. I've spoken to the site owner about it, he noticed the same thing.

 

Note the sudden drop-off in annual mean temps. While 1999, 2001 and 2002 were indeed relatively cool years, they were not so drastically cooler as shown now. DWP temps would have been warmer still.

 

Attached File  lacvannt.gif   106.64KB   0 downloads

 

I put together graphs comparing some years at the Civic Center to the USC site, side-by-side. Note the lack of variability and less prone to extremes the USC station is:

 

Attached File  comparison 97 01.png   860.41KB   0 downloads


  • Eujunga likes this

My personal weather station: Davis Instruments Vantage Pro 2

 

2019-2020 Season Total: 15.75" (as of 6/1/20)

 

2018-2019 Season Total: 15.84"

2017-2018 Season Total: 4.63"

2016-2017 Season Total: 15.18"

2015-2016 Season Total: 8.12"

2014-2015 Season Total: 10.09"

 

California Water Year/Rainy Season measuring period runs from July 1 to June 30.
 

 

 


#2263
Mr Marine Layer

Posted 29 December 2019 - 09:06 AM

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Tomorrow's storm is looking weaker than before.

#2264
Reg1992

Posted 29 December 2019 - 11:10 PM

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Less than 0.10" predicted for us now. Mountains are still expected to get snow, however.



My personal weather station: Davis Instruments Vantage Pro 2

 

2019-2020 Season Total: 15.75" (as of 6/1/20)

 

2018-2019 Season Total: 15.84"

2017-2018 Season Total: 4.63"

2016-2017 Season Total: 15.18"

2015-2016 Season Total: 8.12"

2014-2015 Season Total: 10.09"

 

California Water Year/Rainy Season measuring period runs from July 1 to June 30.
 

 

 


#2265
Eujunga

Posted 30 December 2019 - 08:41 AM

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Per NWSLA AFD: "Rain chances fading faster than a cheap postcard."  I always like when they spice it up a bit.

 

Looks like it's gonna be pretty boring around here for at least the next couple of weeks.  Guess I'll need to go out of town again in order for SoCal to score any more interesting weather.


  • Chris and Reg1992 like this

Tujunga, CA (15 miles N of Downtown L.A.) - Elev. 1,860 ft.

 

Eugene, OR (5 miles SSW) - Elev. 850 ft.


#2266
Reg1992

Posted 30 December 2019 - 02:52 PM

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Snow still visible on the mountains as low as roughly 4200 feet.



My personal weather station: Davis Instruments Vantage Pro 2

 

2019-2020 Season Total: 15.75" (as of 6/1/20)

 

2018-2019 Season Total: 15.84"

2017-2018 Season Total: 4.63"

2016-2017 Season Total: 15.18"

2015-2016 Season Total: 8.12"

2014-2015 Season Total: 10.09"

 

California Water Year/Rainy Season measuring period runs from July 1 to June 30.
 

 

 


#2267
Mr Marine Layer

Posted 30 December 2019 - 03:19 PM

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Rather unusual gloomy offshore wind event today.

#2268
Mr Marine Layer

Posted 30 December 2019 - 03:22 PM

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Never posted the snow picture from Friday morning.

Attached File  20191227_123913.jpg   260.53KB   0 downloads
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#2269
Mr Marine Layer

Posted 30 December 2019 - 07:47 PM

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Storm really fizzled out.



#2270
Reg1992

Posted 30 December 2019 - 08:28 PM

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Nice pic of the western side of the Santa Anas, Mr Marine Layer.

 

Had some drizzle about an hour ago for a few minutes. Wasn't measurable, but at least I get to put Trace for today's precipitation.



My personal weather station: Davis Instruments Vantage Pro 2

 

2019-2020 Season Total: 15.75" (as of 6/1/20)

 

2018-2019 Season Total: 15.84"

2017-2018 Season Total: 4.63"

2016-2017 Season Total: 15.18"

2015-2016 Season Total: 8.12"

2014-2015 Season Total: 10.09"

 

California Water Year/Rainy Season measuring period runs from July 1 to June 30.
 

 

 


#2271
Mr Marine Layer

Posted 30 December 2019 - 10:13 PM

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Still cloudy and windy here.

#2272
Reg1992

Posted 31 December 2019 - 02:41 AM

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Windy here tonight as well, keeping temps rather warm.



My personal weather station: Davis Instruments Vantage Pro 2

 

2019-2020 Season Total: 15.75" (as of 6/1/20)

 

2018-2019 Season Total: 15.84"

2017-2018 Season Total: 4.63"

2016-2017 Season Total: 15.18"

2015-2016 Season Total: 8.12"

2014-2015 Season Total: 10.09"

 

California Water Year/Rainy Season measuring period runs from July 1 to June 30.
 

 

 


#2273
Mr Marine Layer

Posted 31 December 2019 - 10:16 AM

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Still windy with much more sunshine today. The wind is making a big mess.

#2274
Thunder98

Posted 31 December 2019 - 04:19 PM

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Boring dry weather for the foreseeable future.



#2275
Mr Marine Layer

Posted 31 December 2019 - 06:19 PM

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Things need time to dry out a little bit. Both sunshine and rain are needed for growth.

#2276
Reg1992

Posted 01 January 2020 - 12:26 AM

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Happy New Year and New Decade everyone. Wonder what extremes and trends are in store for us this decade. Maybe another low snow event, or a wet 30"+ rainy season? Haven't had one since 2004-05.

 

2019 at my station:

Attached File  2019.png   16.2KB   0 downloads



My personal weather station: Davis Instruments Vantage Pro 2

 

2019-2020 Season Total: 15.75" (as of 6/1/20)

 

2018-2019 Season Total: 15.84"

2017-2018 Season Total: 4.63"

2016-2017 Season Total: 15.18"

2015-2016 Season Total: 8.12"

2014-2015 Season Total: 10.09"

 

California Water Year/Rainy Season measuring period runs from July 1 to June 30.
 

 

 


#2277
Eujunga

Posted 01 January 2020 - 08:06 AM

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Closed out December with an average of 60 / 47 and a total of 5.71".  Coolest since 2012 and wettest since 2010.


Tujunga, CA (15 miles N of Downtown L.A.) - Elev. 1,860 ft.

 

Eugene, OR (5 miles SSW) - Elev. 850 ft.






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