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 Post subject: Re: APRIL rain storms
PostPosted: Sat Apr 07, 2018 1:09 am 
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Dave's Run
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The firehose just turned on! It should be heading to Mammoth later.

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 Post subject: Re: APRIL rain storms
PostPosted: Sat Apr 07, 2018 2:37 am 
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Rodger's Ridge
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It's currently 55° at the Mammoth Airport and 58° in Huntington Beach.

Snow level is almost 12K


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 Post subject: Re: APRIL rain storms
PostPosted: Sat Apr 07, 2018 2:43 am 
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Cornice Bowl
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Just got into town at 2am
Light drizzle with breezy conditions. 49 F , should be raining good by morning.
Lot of snow has disappeared in town this week.
Looks like they backed off on the snowfall for tomorrow night. Mountain is going to be pretty icy Sunday morning.
Maybe next weekend will be good.


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 Post subject: Re: APRIL rain storms
PostPosted: Sat Apr 07, 2018 4:14 am 
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Dave's Run
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Moderate to heavy rainfall since 2 AM. Lots of urban flooding going on in the Bay Area now.

http://www.wpc.ncep.noaa.gov/metwatch/m ... 92&yr=2018
DISCUSSION...THE PINEAPPLE EXPRESS FORM OF AN ATMOSPHERIC RIVER
CONTINUES INVADING CALIFORNIA FROM THE PACIFIC. A COLD FRONT IS
POISED TO MAKE LANDFALL IN NORTHWEST CA AT THIS TIME.
PRECIPITABLE WATER VALUES PER GPS VALUES ARE 1.8" JUST NORTH OF
THE BAY AREA, AND REGIONALLY EXCEED 1.3". WET BULB ZERO HEIGHT
WAS A TROPICAL 13,000 FEET PER THE 00Z OAKLAND SOUNDING.

Monterey disco

.DISCUSSION...As of 3:00 AM PDT Saturday...An atmospheric river
event has brought significant rainfall to the San Francisco Bay
Area and North Bay since Thursday night. San Francisco Downtown
recorded a one-day total of 2.22 inches which ranks it as the
second rainiest day in April. This total has already exceeded the
normal for the month of April which is 1.46 inches. Highest totals
for the storm are in the North Bay hills with Occidental picking
up 7.39 inches and Mt Tamilpais 6.67 inches.

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 Post subject: Re: APRIL rain storms
PostPosted: Sat Apr 07, 2018 4:20 am 
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Dave's Run
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245 AM PDT Sat Apr 7 2018

The Flood Warning continues for
the Merced River at Pohono Bridge.
* until further notice...or until the warning is cancelled.
* At 1:00 AM Saturday the stage was 8.4 feet
* Moderate Flooding is forecast
* Expected to rise above flood stage of 10.0 FT early this morning
then forecast to crest near 15.0 FT this afternoon then forecast to
recede to near 11.0 FT after midnight tomorrow.
* Flood Stage 10.0 ft
* Monitor Stage MSG ft
* IMPACT...Near 12.5 feet, Northside Drive and Southside Drive, which
are the main roads in Yosemite Valley, become flooded and are
closed to traffic.
* IMPACT...Near 10.0 feet, Western portion of North Pines Campground
located at the east end of Yosemite Valley between the confluence
of the Merced River and Tenaya Creek begins to flood. Water rises
to the base of the swinging bridge downstream from Chapel Meadow.
* IMPACT...Near 9.5 feet, Portion of Lower Pines Campground becomes
flooded. Limited site-specific evacuations begin at Housekeeping
Camp located along the south-facing bank of the Merced River.
(Upstream from Sentinel Bridge and downstream from Stoneman Bridge)
* IMPACT...Near 9.0 feet, Chapel Meadow (south side of river) and
Cooks Meadow (north side of river) begins to experience overflow.
* IMPACT...Near 6.5 feet, River is closed to rafters and flotation.

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 Post subject: Re: APRIL rain storms
PostPosted: Sat Apr 07, 2018 9:56 am 
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Rodger's Ridge
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There's video of Yosemite flooding on the yosemitenps IG story. Minor at this point since it just hit 10ft.

McCoy has 2" of rain since 7am yesterday with a heavy band moving through over the next couple of hours. If the CNRFC qpf is correct then about another 2" should fall by tomorrow night.


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 Post subject: Re: APRIL rain storms
PostPosted: Sat Apr 07, 2018 9:57 am 
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Rodger's Ridge
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Location: Little slice of heaven in the Eastern Sierra
It really started pounding rain around 11:30 last night and hasn't let up yet. We never started a fire last night, but it was chilly and damp enough in the house this morning to light one even though it's 47 outside. The avy blasting early this morning shook the house. June Mountain is closed today (tomorrow is their last day and conditions probably won't be pretty). There are more lifts open here today than I thought would be, but looking at the cams, hardly anyone is skiing/riding.

We have water leak damage from our one tall living room window. I opened the blinds this morning to water dripping off of them and see there is a leak in the seal in top portion of the lower window frame. Had to put towels down on the sill and carpet as both were soaked. Then I noticed when looking out the window the muddy mess outside at the edge of our back deck. We store some bricks under there that we use in the gardens in summer and they were strewn all over the lawn. Apparently a large furry visitor decided to get out of the rain last night and we have no idea if it is still there or not!

Image

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A bit of flooding off the street at the top of our driveway. I imagine the French drain is getting full.

Image

Not much left of an already small snow storage pile.

Image

The snow on the roof is almost gone. All we'll have to do is push the rest off with a shovel through the open window when the storm is over.

Image

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 Post subject: Re: APRIL rain storms
PostPosted: Sat Apr 07, 2018 11:24 am 
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Dave's Run
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Meh. Only got 1.5" of rain for the "event".

Per the GFS there's 2 more colder storms to come thru next week. Maybe those will help repair the snowpack.

Merced River webcam

Yosemite Falls is big!
https://www.nps.gov/yose/learn/photosmu ... ebcams.htm

Bridalveil Fall plummets into fog shrouded Yosemite Valley, closed to public due to Merced River flooding
https://twitter.com/BeePhotos/status/982668830248808448

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 Post subject: Re: APRIL rain storms
PostPosted: Sat Apr 07, 2018 12:16 pm 
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Rodger's Ridge
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Finally back below freezing at the top so Mammoth will get some snow out of this storm anyway.


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 Post subject: Re: APRIL rain storms
PostPosted: Sat Apr 07, 2018 12:41 pm 
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Cornice Bowl
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Thanks for the links to the Yosemite cams Cheaps.
Bridalveil is kicking butt in that video clip.
Also Horsetail Falls on the shoulder of El Capitan is flowing nicely.

SL, that's kind of cool that you had a visitor last night. Have you ever had a bear under there before?

Sorry about your leak, I fully expected some from this storm. We have a couple of spots on the windward side of our house that leak and I've tried to seal every nook and cranny I could find on our siding and still the leaks appear. It's frustrating, sometimes they leak and sometimes they don't. This storm it was perfectly dry.

Right now the temp is about 10 degrees cooler than it was at 2:30 in the morning and dropping slowly.


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 Post subject: Re: APRIL rain storms
PostPosted: Sat Apr 07, 2018 1:29 pm 
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Rodger's Ridge
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I just read that Oroville is expected to rise to the 830' level which would prompt opening of the spillway. The lake has been kept at lower than normal levels this winter in an attempt to prevent the need to use the patched up spillway.


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 Post subject: Re: APRIL rain storms
PostPosted: Sat Apr 07, 2018 3:48 pm 
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Dave's Run
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Merced River at Happy Isles in Yosemite!

Image

MERCED RIVER - YOSEMITE AT POHONO BRIDGE (POHC1)

Image


Pic from my friend when she was on her way to Reno today:

"Truckee river near Boca Lake east of Truckee. Don't think I ever saw the Truckee this high and definitely never this dirty."

Image

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 Post subject: Re: APRIL rain storms
PostPosted: Sat Apr 07, 2018 4:07 pm 
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Climax
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Location: South facing foothills of the Santa Susanas
link - https://www.cnrfc.noaa.gov/obsRiver.php?id=POHC1
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 Post subject: Re: APRIL rain storms
PostPosted: Sat Apr 07, 2018 4:49 pm 
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Dave's Run
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The normal viewpoint from that Merced River cam

Image

Flooding story with video from the Fresno Bee:
http://www.fresnobee.com/news/local/art ... 42259.html

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 Post subject: Re: APRIL rain storms
PostPosted: Sat Apr 07, 2018 5:48 pm 
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Rodger's Ridge
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Looks like it might crest about a foot lower than forecast. Relatively minor flood.


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