Friday, November 30, 2018

The Rewetting of the Western U.S.

The last two weeks have been a major turnaround for water resources along the west coast of the U.S.  And a decided end of California's dry season and enough water to end the wildfire threat over central and northern CA.

Here are the precipitation totals for the past two weeks from the National Weather Service official analysis for the western U.S..   Significant totals, ranging from around 15 inches in the northern Cascades to 5-10 inches in the higher terrain of California.


But how much has this differed from normal for the past 2 weeks?  The figure below has the answer!  Most of Washington has been near normal, but California is another story....way above normal (3-7 inches)


The latest streamflow levels show most of our state has normal to above normal streamflow, with the exception of a few rivers over SW Washington.

California has normal to above normal streamflows after all the rains.

Reservoir storage in California is in good shape, most at or near normal (the red line), except for Lake Orville, the heavily damaged reservoir in which water levels have been held low).  There is plenty of room to store more water, and the recent rains are starting the process.


For example, there has been a huge surge upwards in the storage at Trinity Lake in northern CA (see below)

Here in Seattle, both cumulative precipitation and reservoir levels are close to normal (see below)

The bottom line is that worries about drought are now fading, as substantial precipitation has reached the west coast of the U.S.

21 comments:

Reputable Repaints said...

Wait for governor brown to announce the cause of the rain is climate and something (taxes) must be done!

K.R. Burgess said...

"gnitteweR of the Western U.S."
Sounds like an oximoran !
LOL
Oxymoron !
LOL

Placeholder said...

Any idea on how long it will take those jokers in California to fix the Oroville dam?

christine said...

Did you see all of this, over the addition of a fuel tax designed as a carbon reduction measure. Europe has the same inequality trends and the yellow vests self-assembled outside of political parties to say that it was the last straw. I speculate that France has a more progressive tax structure than WA too. (interesting how french protests are both much more dramatic yet calm and safe). https://www.youtube.com/watch?v=ud-yqhyiGjo

gnolan said...

Essentially the current post is about California and Washington hydrology but no Oregon. Please consider including reservoir and stream flow data for us in the future. The NRCS has not updated Oregon November reservoir data yet. The USGS map data for Oregon streams shows mainly 25-75% normal, with about 14 sites below 10% and around 23 sites between 10 and 24% normal. Absent any other data and despite the recent uptick in precipitation, this looks like in this state we are still well short of favorable hydrology.

I am still optimistic about wetter conditions to come. But I wish you could expand the scope beyond your corner of the Northwest.

WeatherMaven said...

I think that's controlled by the Army Corps of Engineers?

Eric Blair said...

As soon as they complete the non - bullitt train to nowhere, they'll get right on it!

sunsnow12 said...

The SPU graphs are as of 11/26 (expect significant inflows when that is updated), and the engineers have been dumping water for weeks.

I think you are burying the lede here, which is the precip this fall in our WA Olympics and Cascades.

Which in and of itself is not a huge story, it is not like we have seen major flooding or that this year has differed all that much from recent wet years in the mountains. But it is when all we have been hearing - since NOAA announced that our fall here would be (very) dry (again), is how dry it has been. And it hasn't - particularly where it matters most (our watersheds) - not by a long shot.

Not that we're in "wet-drought" territory yet - like the infamous 2015 season, where we broke records for fake drought insanity - but we're getting there. It's just frustrating to listen to the deception and fear-mongering. It happens every year now, and unfortunately people believe it.

Thanks for the good post.

Unknown said...

It seems you spoke too soon. They are now considered France's worst riots since 1968.
https://www.reuters.com/article/us-france-protests-cleanup/stunned-parisians-clean-up-posh-central-district-after-worst-riots-since-1968-idUSKBN1O10EQ

Chris H. said...

Placeholder, I tried to answer your constructive criticism in the comment section of cliffs last blog.

Was it helpful?

If you need more information I'd highly suggest you read Bruce Tempers book "staying alive in Avalanche Terrain".

He also has a new one out. I believe he works at the Avalanche Center in Utah.

Out of all the Avalanche safety books out there, Bruce thinks more like the way back country skiers think. Regional forecast are no good if you don't know how to evaluate the particular slope your considering skiing.

Personally I never have looked at the regional forecast unless I'm trying to do research on a past Avalanche incident. Unfortunately lot of people rely on original forecast to make their decision for them. There really aren't any shortcuts.

It really helps to listen to your uncertainty and to gather the knowledge and stay conservative as you gather experience. But most people just poach other people's skin track and place those groups at in increased risk of harm.

Lots of good Avalanche centers out there, unfortunately the one we have in Washington State is not one of them.

But I'm hopeful they will improve, because right now, putting out inaccurate information when it comes to safety is downright irresponsible.

Placeholder, if I can try to address any more of your concerns don't hesitate to ask.

And this comment I used the word 'poach'.

That's skier slang for someone who takes advantage of all your, or your groups, hard work hard work of breaking a trail and follows you up only to become a hazard to your group on days when there's an avalanche concern.

Usually those "poachers" are sipping lattes while the trail Breakers are out there evaluating snow conditions and busting their butts breaking deep snow.

The commercial guides poach a lot of Trails in our area.
Apparently does young guys are too tired from heli-skiing to do the work themselves and they like to keep rested up for their next day on the hell-bird.

In our area we refer to those guys as carpetbaggers.

And just so you're not confused, lots of the old-time skiers show our routes to newcomers to our sport or new to our area.

We're proud of our mentorship initiatives in the tradition of those who mentored us in safe travel in the mountains.

True Pathways always.

Chris H
Heli-free North Cascades

Ali said...

In reading many of your posts regarding drought, Cliff, it appears that you are mainly referring to meteorological drought- the amount of precipitation over a time period. However- doesn't the temporal pattern and timing of rainfall affect hydrologic drought more substantially than just the sheer amount of water that has fallen? For instance- a heavy rainfall over a short period of time on dry soil produces mostly overland water flow- a quick dump of rainfall into streams and some soil erosion but not a lot of water infiltration into the soil, versus small amounts of rain steadily will infiltrate the ground more effectively. Groundwater recharge rates, soil moisture, aquifer recharge- these are affected on different time scales than simply how much water has fallen in one season, and take longer to respond. So yes, filling the reservoirs is nice, but when talking about drought, there is more to the story, yes?

J said...

Governor Brown, as they call him, isn't a Astrophysicist, or any sort of expert on any level.

On another note, anyone ever look at weather.com for their weather? Talk about a political agenda. They show a dark red color (warmer than average) up here all December! HaHa. Look at what our temps will be for the first 2 weeks of the month! I swear, 2+2 = 5, warming now causes cold weather and so on and so forth.

Let's see who's right and who's wrong. Let's let the Sun shows us who is in control of climate shall we? CO2 doesn't drive temperature folks.

This winter and the following will get some attention finally to the nitwits who believe this nonsensical politically driven rubbish!

Eric Blair said...

TWC is owned and operated by the consortium of Comcast/NBC/MSNBC, which tells you all you all you need to know about their inherent biases and agenda. When they were owned by Landmark communications they stuck to the weather forecasts, and that was it. Now it's nonstop 24/7 scaremongering, replete with scary images of impending doom, even when they're only discussing a local storm. They are hacks, period.

gnolan said...

Ali,

Bearing on your comment, on page 12 of the weekly USDA climate report (https://www.wcc.nrcs.usda.gov/ftpref/support/drought/dmrpt-20181129.pdf) is a map of soil moisture indicators. Except for three small spots (one in SW and two others in central Washington locations), the modeled soil moisture there is generally below 30%. A bit of E Wa. is in the 30-70% range. Not surprisingly Oregon is showing a swath in the red or less than 5% range and more in the less than 20% designation.

I have been trying to run down Oregon data corresponding to that Dr. Mass put up in this post for Wa and Ca. I prefer tabulated data and NRCS I hope will soon be putting up the most current charts of reservoir data. The color graphics are kinda hard to read but its clear to me on the map views that I have found: reservoirs and stream flows are low here in OR. Snow pack is definitely in deficit. By simple mass balance accounting for water in mountains, reservoirs, soil and streams no other explanation such as water managers decisions on water release, etc. can explain away the drought designation the USDA has given Oregon.

Again I remain hopeful about the coming winter. The Stormsurf fellow should soon be putting up his prognostications regarding MJO and ENSO.

Snape said...

Weird changes in the Western Washington Cascades. A lot wetter during the rainy months, no trend for the dry months. Going back to 1895:

October-May: + 0.52"/decade
June-September: 0.0"/decade

Also, fastest warming is in January:
+ 0.4 F/ decade

(Climate at a glance)


Chris Mc said...

I think it's important to remember that its not really about warming or cooling.. the fact remains that burning barrels of oil in an enclosed system will lead to unhealthy air quality.. similarly extracting oil the way this industry allows (gulf of Mexico) is absolutely shameful. Should be criminal.

Alex said...

Even if Mars had 1/100th of Earth's fresh water that would be considered a miracle! How did our planet get all of it?

Placeholder said...

TWC is owned and operated by the consortium of Comcast/NBC/MSNBC, which tells you all you all you need to know about their inherent biases and agenda. When they were owned by Landmark communications they stuck to the weather forecasts, and that was it. Now it's nonstop 24/7 scaremongering, replete with scary images of impending doom, even when they're only discussing a local storm. They are hacks, period.

When we moved out of Seattle, People's Republic Of, to the countryside where there's no cable, I got a satellite dishes, one from Hughesnet for middling Internet and another from Dish for TV.

Dish carries the Weather Channel and Weather Nation. If you want what TWC used to be, you watch WN. When it comes to weather, >90% of my watching is of WN; I only switch to TWC during commercials. TWC really stinks. The propaganda crowds out the actual weather.

Charles Primm said...

But two weeks of good rainfall doesn't mean there's now no possibility of drought, does it? The next several days, for example, look bone dry. Couldn't we be right back to a below-normal pattern?

Ansel said...

I'm sure the people of Paradise are saying, if only the rain came three weeks ago...

Bruce Kay said...

Cliff - As if it isn't obvious, this following video could be useful to all, left and right.

For you too, in regard to his comments regarding experts and their approach to wicked problems, which despite their own perceptions are seldom strictly rational.


https://www.youtube.com/watch?v=iOu_8yoqZoQ