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 Post subject: Re: 2017 Flooding...
PostPosted: Sat Feb 18, 2017 7:29 pm 
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Rodger's Ridge
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So this doesnt look so good.

SurfnSnowboard wrote:
Now we turn our attention to the big storm for Monday and Tuesday.

72 hour qpf and basically none of it is for tomorrow it's split between Monday and Tuesday.

Image

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 Post subject: Re: 2017 Flooding...
PostPosted: Sun Feb 19, 2017 10:06 am 
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Rodger's Ridge
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Did cavitation cause the failure of the Oroville spillway?

http://www.mercurynews.com/2017/02/17/o ... -collapse/


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 Post subject: Re: 2017 Flooding...
PostPosted: Mon Feb 20, 2017 7:12 am 
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Climax
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^^^I was assuming there was some reinforcing steel in the concrete -rebar, mesh... (In regards to the main spillway)
Drone showing work completed on E spillway. https://www.youtube.com/watch?v=Z0FDsiVFEvg

The Birth of Oroville Dam - https://www.youtube.com/watch?v=p_5udzKfLQM
It was built one year ahead of schedule.

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 Post subject: Re: 2017 Flooding...
PostPosted: Mon Feb 20, 2017 9:45 am 
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Rodger's Ridge
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The shot of the main spillway is scarier to me. To think the embankment is now completely eroded on that one side and the Grand Canyon is being blasted into that slope from the outflow. Could that undercut the spillway below?

Looking at the now dry area behind the emerg. Sspillway shows how much water there was for it to over top like it did. Btw Don Pedro came within 2 feet of overflowing too.

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 Post subject: Re: 2017 Flooding...
PostPosted: Mon Feb 20, 2017 10:36 am 
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Cornice Bowl
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cheapski wrote:
The shot of the main spillway is scarier to me. To think the embankment is now completely eroded on that one side and the Grand Canyon is being blasted into that slope from the outflow. Could that undercut the spillway below?

Looking at the now dry area behind the emerg. Sspillway shows how much water there was for it to over top like it did. Btw Don Pedro came within 2 feet of overflowing too.


From what I have read, it appears the engineers are less worried about this because it eroded to bedrock and holding.


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 Post subject: Re: 2017 Flooding...
PostPosted: Tue Feb 21, 2017 1:52 am 
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Rodger's Ridge
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Oroville

Date / Time RES ELE STORAGE OUTFLOW INFLOW
02/21/2017 00:00 850.34 2812914 60166 91087

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 Post subject: Re: 2017 Flooding...
PostPosted: Tue Feb 21, 2017 10:18 am 
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Cornice Bowl
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Heard a San Joaquin Levee overtopped :o Edited to add that it appears to have been repaired for the time being. Huge area of inundation south of the 120 east of I5 is safe now!


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 Post subject: Re: 2017 Flooding...
PostPosted: Tue Feb 21, 2017 7:48 pm 
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Rodger's Ridge
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There was a flash flood warning for Dayton NV this afternoon when it appeared that a water retention pond would fail. The water receded and the warning has been canceled.


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 Post subject: Re: 2017 Flooding...
PostPosted: Tue Feb 21, 2017 8:46 pm 
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Rodger's Ridge
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This is between San Jose and Morgan Hill, along the 101

FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA, CA
225 PM PST TUE FEB 21 2017

...The flood warning continues for the following rivers in
California..
Coyote Creek near Edenvale

.In the South Bay, releases from Anderson Reservoir remain elevated
as the passage of runoff from the upper Coyote Creek watershed moves
down the system. The runoff peak has been reached immediately below
the dam at the Madrone stream gage. Cresting is occurring downstream
at the Edenvale forecasting location. Water levels near Edenvale are
expected to fall back down below flood levels by 6pm tomorrow.

Additional flooding is occurring upstream of Edenvale in the vicinity
of Morgan Hill from a levee breach on the Coyote Canal which is releasing
water onto Highway 101.
The Flood Warning continues for
The Coyote Creek near Edenvale
* Until further notice
* At 12PM Tuesday the stage was 13.6 feet
* Record flooding is occurring
* Flood stage is 10.0 feet

1238 PM PST TUE FEB 21 2017

...A FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 PM PST TUESDAY FOR
CENTRAL SANTA CLARA COUNTY...

At 1235 PM PST, local law enforcement officials reported flooding on
the Coyote Creek Canal from a levee breach that is releasing water
across Highway 101. All lanes in both directions have been closed
due to flooding. Flows will likely be reduced later today as the
flood wave on Coyote Creek moves through the system below Anderson
Reservoir.

Reporting gauges on Coyote Creek continue to indicate active record
flooding. This Areal Flood Warning supplements the active Flood
Warning at the Coyote Creek forecast location at Edenvale. Flooding
is expected to continue for the rest of the day and throughout the
night.

Some locations that will experience flooding include...
San Jose and Morgan Hill.

http://kron4.com/2017/02/21/major-flooding-in-san-jose/
http://kron4.com/2017/02/21/flooding-sh ... rgan-hill/
http://kron4.com/2017/02/21/water-pouri ... reservoir/

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 Post subject: Re: 2017 Flooding...
PostPosted: Tue Feb 21, 2017 9:25 pm 
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Dave's Run
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Well I guess the folks at Google will be Gurgling.

Did I say that?

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 Post subject: Re: 2017 Flooding...
PostPosted: Tue Feb 21, 2017 9:55 pm 
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Rodger's Ridge
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Google is in Redwood City CyberK!

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 Post subject: Re: 2017 Flooding...
PostPosted: Wed Feb 22, 2017 9:47 am 
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SAN JOSE (KRON) — Mandatory evacuation orders in San Jose have expanded due to severe flooding.

New orders were released at 12:15 a.m. on Wednesday.

The area is along Coyote Creek, in the Coyote Creek 100 year flood zone plus about 250 feet, running from north of 280 to south of 101.

At least 14,000 residents have been forced to flee their homes.


http://kron4.com/2017/02/22/mandatory-e ... -flooding/
(map of evacuation area in article)

This just shows how waterlogged the entire state is. Its not even anywhere near the Sierra snowpack. It seems like any reservoir is vulnerable to over flowing with all the rain.

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 Post subject: Re: 2017 Flooding...
PostPosted: Mon Feb 27, 2017 11:02 pm 
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Climax
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Location: South facing foothills of the Santa Susanas
Looks like going to be record event..http://www.cnrfc.noaa.gov/graphicalRVF.php?id=FSNC1
I don't know whats around this area but I hope they fair well..
SAN DIEGO RIVER - FASHION VALLEY (FSNC1)
Historical High Stage/Flow Events (Period of Record - Jan 1982 to Present)
1995*

9,430 Flow CFS

13.47

FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
02/27/2017 10 PM PST 13.7 8193 Above Flood
02/27/2017 11 PM PST 14.0 9199 + Above Flood
02/28/2017 12 AM PST 14.2 9866 + Above Flood
02/28/2017 01 AM PST 14.3 10267 + Above Flood

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 Post subject: Re: 2017 Flooding...
PostPosted: Mon Feb 27, 2017 11:22 pm 
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Climax
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Location: South facing foothills of the Santa Susanas
via SGX -
San Diego River obs 12.9 5,810 at 8pm 02/27/17 (18)
Fashion Valley >ms 7.5 at current time
(fsnc1) >fs 11.3 at current time
Max 13.6 7,960 at 12am 02/28/17 in 3 hrs

* at 13.5 feet, parking structures designed for flooding fill with water. Golf
course will be under water. Hotel Circle Road north will be under water.
This crest compares to a previous crest of 13.5 feet on Feb 21 1914.

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 Post subject: Re: 2017 Flooding...
PostPosted: Mon Feb 27, 2017 11:23 pm 
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Dave's Run
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and it rained harder further north! One of these days Fashion Valley/Mission Valley is going to go under when a storm like today hits when the reservoirs are full. ie - back to back wet years. Rain stopped or eased off in our area now for a bit. We've had this kind of rain over two or three days before, but I don't remember a less than 24 hour event like this. From the radar it looks like we were in the magic spot to get a lot of rain. What hit us moved up to Palomar and (with the lifting) they were above 8 inches last I looked. I'll check my bucket in the morning but I bet it's close to 4 inches. I wonder if this will bring Lake Hodges up enough to spill with the runoff? It's usually one of the first to go and was in one of the wetter areas for runoff. The storms this year haven't had as much runoff as some past stormy years in our neck of the woods. The last two storms have changed that.


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