Tuesday, August 19, 2014

Back From Camp!

Tuesday, August 19, 201411:26 a.m.

Hidden Valley Camp - 2003. 
Hidden Valley Camp - 2014.

It's really surreal how time flies. At least I can take solace in the fact that I'm still just as much of a goofball now as I was back then.

This was my 8th summer up at HVC. I was a camper from 2003-2008, then a "camper leader" in 2010. This summer was my first summer on staff. When I was a camper, the only staff job I could ever imagine having was a group counselor, but I'm very happy to have had a job in the kitchen this year. I learned a ton from the man in charge, Steve Stimpson, most notably how to manage my time effectively. I know I will take the lessons I learned from him with me for the rest of my life. I'm also now extremely good at baking for 170+ people. I've got some work to do as far as baking for one person goes though.

Now that I'm back, I've got some serious work to do. I've got a saxophone solo to transcribe, I've got meteorology internships to look into, and of course I've got weather blogs to write. My weather blog productivity will soar in the upcoming days.

Before I sign out for now though and continue to unpack, I'd like to emphasize how amazing this experience was. If you have kids and are interested in sending them to summer camp, definitely check out HVC. And if you are my age +- several years and looking for a summer job that may be the most rewarding experience of your life, talk to me or email the camp director (he's awesome) directly at hiddenvalleycamp@earthlink.net.

It's good to be back!

Tuesday, July 22, 2014

Relief in Sight For Firefighters

Tuesday, July 22, 2014
12:11 a.m.

Apparently, there's been a pretty massive complex of wildfires in Eastern Washington over the past week I've been at camp. I'm finishing another day off and need to be back in the kitchen at 7 a.m., but I have enough time to write a brief blog.

Here are all the fires burning as of Monday:

Carlton Complex Fire - (238,000 Acres Burned; 2 Percent Contained, largest in state history)
Chiwaukum Creek Fire - (11,000 Acres Burned; 10 Percent Contained)
Mills Canyon Fire - (23,000 Acres Burned; 75 Percent Contained)
Buzzard Complex Fire - (396,000 Acres Burned; 75 Percent Contained)
Shaniko Butte Fire - (42,000 Acres Burned; 50 Percent Contained)
Waterman Complex Fire - (12,000 Acres Burned; 60 Percent Contained)
Pine Creek Fire - (30,000 Acres Burned; 35 Percent Contained)

The Carlton Complex Fire near Winthrop, WA on July 18. Soldiers assigned to the 66th Theater Aviation Command, Washington Army National Guard, brought six helicopters to the area to assist firefighters on the ground. 
Washington Army National Guard photo by Sgt. 1st Class Jason Kriess http://www.defense.gov/homepagephotos/leadphotoimage.aspx?id=98018

The Carlton Complex Fire was initiated by a lightning strike in the Methow Valley in Okanogan County in Northeastern Washington on July 14, and at 379 square miles as of Sunday, is the largest wildfire in state history. At only two percent containment, it will likely grow some more. The fire indirectly killed one man as he had a heart attack trying to save his Carlton, Washington home from the flames, and 150 homes have been destroyed so far, with an additional 1100 threatened. 1,400 firefighters are fighting this particular blaze.

The Chiwaukum Creek Fire from Leavenworth: Photo Credit - Dominic Urbano.   http://www.fallenleafimaging.com

The Chiwakum Creek Fire was also initiated by lightning, and was done so last Tuesday the 15th. It is currently encroaching upon the Leavenworth area, and 900 people have been evacuated. 1,580 structures are currently threatened by this blaze.

The Mills Canyon Fire from Entiat Road on the Evening of July 9. http://inciweb.nwcg.gov/incident/photograph/3937/15/

The Mills Canyon Fire stared on July 8, but it is unknown what actually started it. Firefighters are almost done containing it, and hopefully it will be completely contained within the next couple days.

Smoke and a Pyrocumulus Cloud from a Northern Part of the Buzzard Complex Fire.  http://inciweb.nwcg.gov

The Buzzard Complex Fire actually consists of seven different fires in east-central Oregon. It started due to a lightning strike, and this strike occurred on July 14th 45 miles NE of Burns. Even though it, at 396,000 acres, is the largest of the fires, it is also 75% contained, so hopefully it can be extinguished within the week.

The Shaniko Butte fire started after a lightning strike on July 13, approximately 12 miles to the north of Warm Springs Oregon. It spread rapidly at first but has since been contained from the north. However, it is expected to continue to grow to the southeast, with 108 structures still threatened by the blaze.

Bailey Butte Fire on July 15, 2014. Photo Credit: Susan Brock  http://wildfireoregondeptofforestry.blogspot.com

John Day Unit fire   http://wildfireoregondeptofforestry.blogspot.com

The Waterman Complex Fire has four separate fires and was started on July 11 by lightning. At 9,745 acres as of Monday, the Bailey Butte Fire is the largest. These fires are located 20 miles NE of Mitchell, Oregon.

Firefighters spraying water on the Pine Creek Fire - July 20, 2014   http://inciweb.nwcg.gov/incident/photograph/3514/3/

The Pine Creek Fire, another lightning-sparked wildfire, is currently burning in the Deschutes National Forest to the south of Fossil, Oregon and was expected to approach residences in Rowe Creek.


I was surprised to see that most of these fires were caused by lightning. Every single one of them was with the exception of the Mills Canyon fire, which has unknown origins, meaning it very well could have been initiated by lightning. I thought that the majority of these fires would be started by humans, but I was wrong.

Is relief in sight? I'm very thankful to say that rainfall does look to be just around the corner. Depending on where you are, the rainfall might be quite substantial as well. Let's take a look at the models.

Valid 05:00 pm PDT, Thu 24 Jul 2014 - 72hr Fcst    www.atmos.washington.edu/~ovens/wxloop.cgi?mm5d3_wa_pcp72+///3

Over the next 72 hours, Western Washington, especially the Cascades, looks to get hammered, with most of this rain occurring in a single day. Unfortunately, Eastern Washington ends up relatively dry. The same is true for Eastern Oregon. Still, a little bit of rainfall goes a long way when fighting these fires, and even a tenth of an inch of rain is something to be grateful for. 

Also, take a look at this.

Valid 11:00 am PDT, Wed 23 Jul 2014 - 42hr Fcst   www.atmos.washington.edu/~ovens/wxloop.cgi?mm5d3_wa_pcp3+///3

Our best model, the WRF-GFS, is predicting a whole helluva lotta rain over a 3-hour period over the Cascades on Wednesday morning. If this rain moves just a tiny bit to the east, the firefighters will get some serious help from mother nature on fighting these blazes. We will have to worry about thunderstorms, but with the amount of rain associated with this system, I think that the benefits will clearly outweigh the risks associated with lightning. We will also cool down significantly, which will assist fire control.

If you are a person, stay dry. If you are a fire... get ready to get wet.


Monday, July 14, 2014

Our "Extremely Warm" Wave

Monday, July 14, 2014
11:13 a.m.

We are in the midst of a period of extremely warm weather. Highs have been in the upper 80s for an extremely long time, and although I can't comment on meteorological figures since I have had very limited access to the interwebs (and outside world altogether) at the summer camp I am working at (hence the very limited blog posts), its been hot and dusty in a place that usually receives copious amounts of summertime rainfall.

But there is one limiting factor. It's not the sunshine we've been receiving, or the time of the year. And it's definitely not because of the Supermoon (however, it would be interesting to see if variations in the distance of the Earth-moon distance would have any sort of impact on temperature, or if they are completely unrelated).

It's the gradients!

Our gradients, for the most part, have been onshore, meaning that there is lower pressure over the land and higher pressure over the ocean. Air flows towards lower pressure, so Washington has been getting a marine push of air, particularly at night, to help cool things down. gets a seaward flux of air, particularly at night. Therefore, even though we've had blazing sunshine with a huge ridge of high pressure giving us warm temperatures, our marine pushes have kept temperatures from getting too extreme. Here are the gradients this morning.

       UIL-  OTH-  PDX-  OLM-  UIL-  HQM-  AST-  BLI-  UKI-  AST-  BLI-  BLI-
14/18  +1.0  -1.1  -0.1  +0.8  +0.2  +0.5  +0.2  -2.1 -10.2   0.0  +1.2  +0.7
14/16  +1.8  -1.0  +1.2  +1.5   0.0  +0.2  +0.2  -3.1  -9.4  -0.1  -0.5  -0.5
14/14  +1.0  -0.6  +1.0  +1.0  +0.1  +0.6  +0.7  -2.5  -8.9  +0.3  +0.5  -0.3
14/12  +1.7  +0.1  +1.0  +0.8  +0.5  +0.9  +0.3  -2.7  -9.1  +0.7  +0.4  -0.5
14/10  +2.7  +1.7  +2.1  +1.5  +1.1  +1.5  +0.5  -3.6  -9.3  +1.5   0.0  -0.8
14/08  +2.7  +2.0  +2.4  +1.8  +1.9  +1.1  +0.5  -3.6  -8.8  +1.5  +1.0  -0.9
14/06  +4.0  +2.8  +2.3  +1.8  +2.3  +2.7  +0.1  -4.1  -9.2  +2.3  +1.0  -1.4
14/04  +2.7  +4.2  +2.1  +1.2  +0.8  +3.2  +1.5  -4.3  -7.5  +3.2  +1.0  -1.9
14/02  +2.9  +3.9  +2.0  +1.0  +1.4  +0.9  +1.6  -4.5  -7.2  +2.6  -0.1  -2.7
14/00  +2.7  +3.4  +1.2  +0.4  +1.4  +1.6  -0.7  -4.2  -7.4  +0.4  -0.5  -3.4
13/22  +1.1  +3.4  -0.2  -0.2  +0.4  +1.1  +1.1  -3.9  -6.3  +1.3  -0.6  -2.7
13/20  -0.2  +2.2  +0.4  -0.8  -0.8  +0.7  +0.6  -3.3  -5.5  +0.4  -0.2  -2.7
13/18  -0.4  +1.6  -2.0  -0.8  -0.9  +0.8  +0.8  -2.8  -5.0  +0.8  -0.1  -2.2

       PDX-  UIL-  CLM-  SEA-  SEA-  OLM-  SEA-  YKM-  SHN-  SHN-  SEA-  SMP-
14/18  +5.2  +0.9  -0.7  +7.5  +7.5  +7.1  +6.4  -1.1  -0.8  -0.4     M     M
14/16  +4.9  +0.9  -0.9  +7.1  +6.7  +6.1  +6.1  -0.6  -1.2  -0.9  +0.9  +6.2
14/14  +4.8  +0.6  -0.5  +6.8  +6.0  +5.6  +6.3  +0.3  -1.2  -0.7     M     M
14/12  +4.4  +0.7  -0.2  +6.5  +5.6  +5.1  +5.6   0.0  -0.9  -0.8     M     M
14/10  +4.6  +1.9  -0.8  +6.4  +5.5  +5.3  +5.5   0.0  -0.9  -0.8  -0.4  +6.8
14/08  +5.0  +1.7  +0.2  +7.0  +5.5  +5.6  +5.1  -0.4  -1.7  -0.8     M     M
14/06  +4.3  +2.6  -0.3  +6.2  +4.8  +4.8  +4.1  -0.7  -0.1   0.0  -0.2  +6.4
14/04  +4.2  +1.8  -1.0  +3.5  +3.4  +3.6  +2.6  -0.8  -0.2  -1.1     M     M
14/02  +2.9  +1.5  -0.1  +4.7  +3.4  +2.5  +3.2  -0.2  -1.3  -0.9  -1.5  +6.2
14/00  +4.9  +1.5  -0.1  +4.4  +4.0  +2.8  +2.5  -1.5  -1.3  -1.0     M     M
13/22  +2.5  +0.5  -0.1  +4.0  +3.1  +2.0  +1.9  -1.2  -1.8  -1.6     M     M
13/20  +4.3  -0.8   0.0  +3.5  +2.9  +2.1  +1.3  -1.6  -1.8  -2.4     M     M
13/18  +1.3  -0.6  -0.3  +2.7  +2.7  +2.3  +1.2  -1.5  -1.6  -2.5     M     M

HQM-SEA is Hoquiam to Seattle, and you can see that the pressure at Hoquiam is always higher than it is at Seattle, leading to onshore flow. This gradient peaked at 4 a.m. UTC July 14 (9 p.m. PDT July 13) per this table, which is pretty typical for these events in Western Washington. The difference is even more stark across the Cascades... take a look at the SEA-YKM (Seattle to Yakima) gradient, which just peaked at +7.5 at 6 p.m UTC July 14 (11 a.m. PDT July 14) and will likely continue to rise.

No picture gives a better example of onshore flow than the one below. I retrieved this from the graphical area forecast discussion (AFD) from Seattle National Weather Service website. Take a look at how the "marine layer" of low stratus clouds and fog has completely engulfed the coast and much of Western Washington.


Now, take a look at how the clouds look 4 hours later.


We had a pretty strong marine push last night, and for that I am grateful. It was very hot in my room, and it was nice to have it cool off. Therefore, it has taken some time for the clouds on the coast to "burn off," and those living on the coast may not even see the sun today. Still, you can see how much it has cleared over the south sound, where the stratus layer was shallower.

So what's in store for the extended? It looks like we'll finally resume to a more normal pattern, but not before another couple warm days. Tuesday will straddle on either side of 90 for much of the lowlands, as the onshore flow that morning will be much weaker than today's. After that, however, we should get into a more typical pattern of highs in the mid-to-upper 70s with clouds in the morning giving way to sunny skies in the afternoon.

However, things look to remain largely dry. Our next shot at rainfall looks to occur next Sunday at the very earliest, and this looks like more of a BB-gun shot than a shot from an UZI.

Valid 02:00 am PDT, Mon 21 Jul 2014 - 165hr Fcst:   http://www.atmos.washington.edu/~ovens/wxloop.cgi?mm5d2_x_pcp3+///3

The CPC (Climate Prediction Center) predicts above normal temperatures and below normal precipitation from now out to two weeks into advance, so long story short, although our warm and sunny pattern may have a few stumbles here and there, we are definitely in the height of summer, and summer isn't going anywhere for a long time.


Thursday, May 22, 2014

Global Warming: The Three Societies

Thursday, May 22, 2014
4:19 p.m.

"Cosmos" has always been a fantastic show, but it, and its host, Neil deGrasse Tyson, seem to have gained even more popularity recently. The thing I love about Mr. Tyson is that he's not only a fantastic science educator, but he's not afraid to call out those who don't believe in the scientific method. Additionally, he clearly sees how at odds science and politics are when it comes to global warming, and he's determined to bring that to the attention of the public. Science and politics aren't synonymous; you can't disprove something determined by science with massive lobbies from oil companies. Or at least that's what we would like believe. Unfortunately, it turns out you can, and much of the American public has been conned, one way or another, into believing that global warming is all but a scam put forth by Al Gore to make him rich. It is true that scientific skepticism is good, and we should inform ourselves of what is taking place in the climatological community instead of blindly believing what our news stations tell us. There is a stark difference, however, between skepticism and denial. At this point, any skepticism with regards to global warming is generally related to the magnitude of the warming due not only to the physics behind making the atmosphere more opaque to infrared radiation but also due to the effects that this warming will have on the formation on different climatic conditions around the world. For example, it is unknown whether global warming could lead to a large increase in low-level clouds off the Pacific Coast of South America, but if it does, the result could be a significant cooling for the entire planet. Not enough to equalize the increase in heat under global warming, but definitely enough to mitigate it.

With that being said, let's get down to the meat of this post. There are three main societies with respect to global warming: the alarmists, the enlightened, and the deniers. These categories should not be treated as fixed and isolated spheres but simply as positions on a sliding continuum. Anyway, let's get started with the alarmists.

The Alarmists:

The alarmists are generally well-meaning, but they are ill-informed about the nuances of climate-change. And this is not entirely their fault. Our news stations make their money off of sensationalist stories; a story saying how Hurricane Sandy was just a precursor to the increased amount and severity of storms we'd see in the future due to global warming is going to get more readers than one saying that Hurricane Sandy was likely not related to global warming and is just another strong storm to hit the East Coast like the ones countless generations before us have experienced. Hurricane Sandy was only a category 1 storm when it landed; it just happened to make a direct hit on the biggest city in the country.

I get these emails from http://www.stopglobalwarming.org/ . I tolerate them and signed up for the newsletters because I thought they had some interesting information from time-to-time, but honestly, most of the articles there are alarmist. A perfect example is one that was recently posted by Bill McKibben of Rolling Stone magazine on Wednesday, May 21. Rolling Stone already has bad enough tastes in music (they gave Toto's best album 2 out of 5 stars!!!), and it is clear from this article that although McKibben's intentions are good, he doesn't know the science behind global warming. My favorite quote from that article is that "it's very clear that the fossil-fuel industry has five times as much carbon in its reserves as it would take to break the planet." Moreover, "on current trajectories, the industry will burn it." So, essentially, "breaking the planet" looks inevitable at this point. But how the heck would you even begin to fix such a thing? If I was Earth, my strategy would be to take my silicate remains to Venus. I honestly don't know if she could do anything, but at least I'd be graced by her beauty for some psychological consolation. Maybe I could ask her out. And if I'm really lucky, I could take her back to my place in the habitable zone.

Don't you hate it when that happens?

That's another thing. The alarmists like to paint problems but not solutions. Or, if they do paint solutions, the solutions just aren't practical. I'm a very environmentally-minded guy, but I do not support Greenpeace, and the reason I do not support them is because they do not support nuclear power. We need to work on making nuclear safer, but there is no way you can power a country with solar panels. And with river flows decreasing due to lower summer snowpack, hydroelectricity is becoming harder to come by as well.

In short, the alarmists are well meaning, but they owe it to themselves to educate themselves on the science behind global warming. I actually blame most of the alarmism circulating around on the liberal media who exaggerate stories that the scientists put out so that they can make more striking headlines. It's an unethical thing to do, and it needs to be stopped. Moreover, the alarmism contributes to the denial when these false claims of doom don't come true. Thankfully, when it comes to climate change, you don't need alarmist claims to convince others that global warming is true; you just need to look at the evidence. And that's where the enlightened come in.

The Enlightened:

There are no climate Buddhas so far, so nobody is truly enlightened when it comes to climate change. For now, this is a title we can only strive for. However, many people are very knowledgeable, learned, educated, and informed. I'm proud to say that all the college professors that I know fall into this department. Don't equate educated with a degree in this sense though... it does not take a Ph.D to be a credible source of information on climate change.

The types of people who fall into this group don't fall victim to the sensationalism of news stories; rather, they spend their time researching climate via more scientific means, such as IPCC (International Panel on Climate Change) reports or reputable sources, such as Cliff Mass' blog. Cliff's blog is one of the best sources of information for explaining climate change to the general population, and I can't recommend it highly enough. Another website I highly recommend is the EPA Climate Change Science page. Those seeking the path to enlightenment know, or, in many cases, know that they don't know, not only what is happening in the atmosphere but why it is happening.

But the main thing that sets apart this group is that even though they believe in global warming, they aren't afraid to say that some climatic changes are not due to global warming. For example, while the alarmists are freaking out about how mankind's carbon emissions are solely responsible for the melting of Greenland's glaciers, some UW atmospheric scientists did a study and found that this melting is due nearly equally to anthropogenic forcing and natural variation. It is this accurate, unbiased information that will really convince the public that global warming is happening, not doomsday stories of "breaking the planet."

From the Seattle Times

It's not just climate change too. I remember when the Seattle Times did a large article about ocean acidification off of our coast and how it was destroying shellfish in our area, and, if I remember correctly, oyster larvae in particular. Carbon dioxide released into the atmosphere is also absorbed by the ocean and turns into carbonic acid when it reacts with water. The article said that this mechanism was responsible for the recent die-offs of oysters. However, Cliff Mass responded with a blog on the subject and informed me that this was actually not the case... that the sudden acidity increase was due to a period of strong upwelling off our coast bringing deep, nutrient-rich, oxygen-poor, acidic water to the surface. Professor Mass wasn't afraid to not only call out the Seattle Times on their inaccurate information; he wasn't afraid to tell the populace the truth about why the oysters died even though the information he gave could be potential fodder for any deniers of climate change or large-scale ocean acidification. We should all strive to have an enlightened, balanced view that looks at the science behind climate change without any predispositions to alarmism. I believe that's something we can do... it's just up to those who have the knowledge to educate those who don't.

One more thing... Al Gore is not an alarmist. He is an activist and educator. An Inconvenient Truth doesn't get everything right, but it gets most things right, and he presents reasonable scientific evidence with reasonable solutions.

The Deniers:

Global warming deniers are like frictionless pendulums built for exercising the conservation of momentum. If you present them with an argument for the validity of climate change, they'll shove a response right back in your face. If you only get into a small debate over global warming, their responses will be rather tame (the momentum of the pendulum will be rather small). However, if the debate starts to explode, the pendulum's momentum will approach dangerous levels where even a glancing blow could cause serious brain or bodily trauma.

The thing is, most of their responses are readily shot down. The most common one that I've heard of is that the Earth hasn't warmed in 15 years. And guess what? For the most part, they are actually right. But just because there is a small 15-year pause in warming that has been going on for the better part of a century does NOT mean that global warming does not exist. We have had pauses before; we had one mid-century between 1945 and 1980. These pauses are undoubtedly due to natural variability, and although the specific reasons behind them are unclear, we can at least hypothesize about why they may have occurred. For example, we were in the cool phase of the Pacific Decadal Oscillation (PDO), a sea-surface-temperature oscillation that occurs over decade-long time scales in the Pacific, beginning during the mid 40s and ending around 1980, which was the exact same period as the hiatus in warming. We were in the "warm phase" between 1980 and 2000, and since 2000 we look to have been in the cool phase again. Our data records simply aren't long enough to make any definitive conclusions, but looking at the century or so of solid, measured data that we do have, there definitely seems to be a trend. So if a global warming denier says that the climate hasn't warmed in the past 15 years, you can say that it is probably due to the PDO having entered a cooler phase at the turn of the century that has offset some of the warming due to increasing greenhouse gas emissions, and add that if there were no increase in greenhouse gases, the climate would likely have cooled over the past 15 years.

Little increase in temperature from 1945-1980 and since 2000

PDO Anomalies: note how cool phases correspond with periods of no temperature increase

Whereas deniers will sometimes make true statements, many of the ill-informed ones (especially the Republican trolls who comment on KOMO news articles) say things that are patently false. They will say that there is no empirical evidence for global warming. They will say that the greenhouse effect doesn't exist. They will even say that 99% consensus is not "science," it is just a hypothetical assumption. I could go on and on with the things I've seen. If I didn't believe climate change was such a serious problem, I'd laugh, but these types of people infuriate me. Unlike the alarmists, they generally do NOT have an open mind and change their opinion when you provide them with evidence. 

In the corporate world, it's all about money and ignorance. There is actually a "scientific organization" called the Heartland Institute that is hired by certain companies to produce scientific articles attempting to disprove global warming. The panel of scientists is exclusively anti-climate-change. They recently published a report called the NIPCC (Nongovernmental International Panel on Climate Change) which focuses purely on denying the existence of climate change. It stands in stark contrast from the IPCC (International Panel on Climate Change), from which it got its name. The IPCC had over 500 lead authors, all unpaid volunteers. The NIPCC had 2, and both were paid heavy sums of money. Not surprisingly, it recently flunked a credibility test.

One thing that the alarmists constantly say is that "we're completely screwed." Some in the educated category say this as well. However, I must stress this: WE, here in the United States, are not completely screwed. Things will be hard, yes, especially for places like New Orleans. If push comes to shove, we may even need to leave those cities. But we will be far better off than places like Bangladesh. With rising sea levels, more intense tropical cyclones, and increasing population density, certain places in the world honestly are screwed. That's why it drives me crazy when I see these deniers thinking only of themselves and not making any effort to reduce carbon emissions.  Global warming could have massive consequences for some, and even though we all emit gratuitous amounts of carbon dioxide, we have the power to reduce our emissions and owe it to the rest of the world to do so. 


Thursday, May 1, 2014

Record Heat for May Day, and a Scorcher for the Oregon Coast.

Thursday, May 1, 2014
9:45 p.m.

I've actually got some free time on my hand before I get back to doing the last 3/10ths of my linear algebra assignment. So I thought I'd post a blog, because I haven't posted for a long time. A word of advice... don't take AMATH 352 at the UW if you don't have to. Unless, of course, you like that kind of stuff. It's not required for my atmospheric science major... but I'm just taking it so that I can pick up an applied math minor to add to my oceanography and music minors. I'm taking four intense science classes this quarter and one pretty disorganized one, so I hope ya'll can empathize to at least some extent with me for my lack of posts. Actually, I have been writing posts, but I haven't been finishing them because they've been too ambitious. 

Today was hot. Record hot. With a high of 85, Sea-Tac absolutely obliterated its 1998 record of 81 degrees. And as of 10:38, it's still 71, which is 9 degrees above our average high. I wonder if the May Day protests have been keeping things from cooling down. The model chart below gives an idea of what the temperature distribution was like this afternoon when temperatures were at their peak.

Valid 05:00 pm PDT, Thu 01 May 2014 - 12hr Fcst:   http://www.atmos.washington.edu/~ovens/wxloop.cgi?mm5d4_ps_slp+2014050112//84/3

A couple interesting things on this map. First of all, notice how much "colder" Eastern Washington is. While we are basking in record warmth, many places east of the Cascade crest remained in the 70s. If I had to predict a reason for this, it would be that the interior summertime continental heat has not yet really built up yet, and that Western Washington benefited from the warming effects of downsloping air flowing off the Cascades while Eastern Washington did not have this effect. But again, this is all just conjecture.

The second point is actually directly related to the downslope warming on the west side of the Cascades. When air sinks, it compresses, and it warms at a rate of 9.8 degrees Celsius per kilometer. Snoqualmie Pass is approximately a kilometer above sea level, so when air flows down from there, it has the potential to warm the temperatures below by 18 degrees Fahrenheit. In practice, the temperature discrepancy is usually not this great because these parcels of air that sink tend to lose heat at a higher rate than the surrounding air since they are warmer, but the effect is still quite strong, especially when offshore flow is strong like today. That's why the foothills have the highest temperatures in the above diagram even though they are at a higher elevation than places like Seattle. The air stops sinking once it gets to the foothills, and this heat is radiated back to the atmosphere before it can reach places to the west. Seattle may have reached 85, but North Bend hit 89, and Enumclaw hit 90.

While we are on the topic of downslope flow and North Bend, let's talk about a different North Bend: North Bend, Oregon. They hit 91 degrees on Wednesday, and they are on the coast. Why? You guessed it... downslope flow off the surrounding mountains. Another fun tidbit; they were warmer than Phoenix that day! Credit to Scott Sistek of KOMO News for the interesting facts. Brookings, Oregon, which is just a bit south of North Bend, tends to experience this effect even more often, and can have freak localized warming as a result. It's not uncommon for temperatures to be in the 50s along the coast during the winter, yet 70 in the Brookings area. Check out their and North Bend's record high temperatures for the year.


Here's an example of a surface observations chart I found on one of Cliff Mass' old blog posts that shows the Brookings Effect quite well. At 80 degrees, Brookings soars above the 60s and 50s on nearly every other station. By the way, Brookings reached 86 on Wednesday.


Yikes... I've gotta get on my AMATH HW... it's now 11:37 p.m. Researching this stuff takes time. But it feels good to write a blog again. Hopefully I can get back into the swing of things.