Wednesday, June 14, 2006

Weather

One thing I miss about Oklahoma is weather as a spectator sport. In the five years that we've been in California, I've seen lightning twice. It's pathetic.

Tornado Alley is centered on Texas, Oklahoma, Arkansas, and Missouri, where warm, moist air from the Gulf hits cool dry air from the northwest. There's an elevation gradient involved, too, with the cool air rolling down the long slope from the Rockies to the Gulf and the warm air sliding up it. Often the cool air overshoots the warm. Now you've got a big pile of cool air sitting above an unhappy layer of warm air. They want to trade places. When they do, they usually end up spiraling past each other. Bingo: mesocyclone.

During April, May, and June, there is usually one big storm a week, and it usually spawns tornadoes. It's a staggering thing to watch. People dog on the Great Plains states for not having any scenery. There's plenty of scenery. It's just up in the air.

The best storms start in the afternoon. Those big cumulonimbus clouds start piling up and piling up. You can see it happen from 20, 30, sometimes even 50 miles away, if it's a clear day. They pile up until they hit the stratosphere, and the high winds up there blow the top of the cloud out into the familiar anvil shape. At this point the storm is 10-20 miles tall and has a radius to match. It is boiling with energy. Lightning starts firing. From the top of the cloud to the base. From the base to the top. From one part of the cloud to another at the same altitude--big snakes of lightning miles long. From the ground to the cloud, and the cloud to the ground.

By now the storm is influencing the atmosphere for dozens of miles around. If you're watching all of this happen from a lawn chair in your back yard, it gets dark and cold and the wind picks up, even if you're not under the cloud (if you were under the cloud, you probably wouldn't still be outside watching). You shiver, take a big pull off your bottle of beer, and say a silent thanks that you're not one of the poor bastards stuck underneath that juggernaut.

If you are underneath the storm, it still may not be raining. It's like a bully has you pinned against the lockers, arm pulled back to smash your face in, and he's just holding it and letting you suffer. 'Cuz you know it's coming. You may go out in the yard and check the color of the clouds. Wall clouds, the kind that drop tornadoes, are the strangest shade of greenish black. Kinda like the fluid that runs out of a week-dead carcass, if you have any experience in that area. When you see clouds that color, it just looks wrong.

Whether you're under the storm or not, you probably have the TV on, and if you're outside you're running in now and then to check it, and vice versa. The National Severe Storms Lab is in Norman, Oklahoma. The local NBC, ABC, and CBS affiliates each have their own Doppler radar, and they upgrade them regularly. The storms usually move together in a line* from west to east, so you can tell from the radar picture whether you're going to get a little rain or an asskicking.

*Forgot to mention that above. Thunderheads often travel in packs. If you're upwind of them, sometimes you can see four or five of them strung out to the horizon.

If it's a bad cluster of storms, you can forget about watching normal broadcast television. Either your show will be interrupted every five minutes for a tornado update, or the station will have switched over to full-time coverage.

The biggest and best storm I ever watched the was the May 3, 1999 cluster that spawned the F5 in Oklahoma City. This was while Vicki and I were living on the north edge of Norman, about 20 miles south of OKC. The storm came out of the west in the late afternoon. Our duplex faced south, so we took chair across the street and sat on the sidewalk and watched. It was unbelievable. We could see the mesocyclone. The whole base of the storm, probably 30 or 40 miles across, was slowly rotating, a bit faster than the minute hand of a clock on continuous sweep. We couldn't see the whole thing, of course, just the edge. The sun was going down, and the whole back side of the storm was painted in sunset colors.

When it got dark, we went inside to follow things on the tube. It was crazy. The middle of the state was completely red with tornado warnings. Torandoes were on the ground everywhere. A monster tornado had touched down near Chickasha and was headed for OKC. Chickasha (chick-a-shay) is about an hour southwest of Norma; we went there once in a while to pig out at Jake's Barbeque. The meteorologists were warning people in south Oklahoma City: get below ground. If you don't have a cellar, get out of the house and go to a public shelter. Those warnings saved thousands of lives.

That tornado was the strongest ever measured. Previously, the fastest wind anyone had ever clocked on Earth was 286 mph near Red Rock, Oklahoma. The peak windspeed of the May 3 tornado was 318 mph. It ripped a trail across the south end of Oklahoma City a mile wide. It crossed I-35 right at the overpass for the Shields Boulevard exit. From the top of the overpass, you could see the path of the tornado like God's own wrecking ball. There was a swath a half mile wide where nothing stood. No trees, no stumps, no telephone poles, no reinforced interior walls...nothing. If you were above ground in that zone, you were dead, period. For a quarter mile on either side of that, it looked like someone had stuck a giant mixer into the ground and just churned everything into mush. All of the debris you usually associate with tornadoes--collapsed buildings, chunks of buildings, buildings that had briefly been airborne, uprooted trees, smashed cars, telephone poles, and everything else--was laying a big jumble. Where the tornado went over the overpass, it had stripped the topsoil off the ground and left the grass dangling by exposed roots.

All of this stretched to the horizon in both directions. For two weeks, you had a half hour delay if you went up through OKC on I-35, because people from Texas and Kansas were rubbernecking at the top of the overpass. I didn't blame them; when I got my turn at the top of the hill, I rubbernecked, too.

That single tornado wrecked more than 10,000 buildings, caused 1.1 billion dollars in damage, and killed 36 people. Considering that 2300 homes and almost 500 apartments simply ceased to exist, that's an amazingly low death toll. Thank God for Doppler radar. And it wasn't alone. In the 72 hours starting on May 3, Oklahoma was hit by 66 tornadoes. They did another half billion dollars of damage and killed another ten people.

I later heard that a meteorology grad student at OU had gotten some footage of the big tornado on his camcorder and sold it for $10,000.

Oh, a couple of misperceptions to clear up. I lived in Oklahoma and frequently visited Texas and Kansas until I was 26. In all of that time, I never heard anyone who was from the plains call a tornado a 'twister'. It's greenhorn Hollywood wannabe bullshit. Also, if you watch the movie Twister, you get the impression that tornadoes are easily visible against the sunlit fields. Usually if you're close enough to see one, you're under an immense black cloud 30 miles wide, it's raining pitchforks, and you can't see your hand in front of your face. Which is why footage of an F5 tornado would be worth ten grand. The tornadoes you see on the Weather Channel are usually the little F1s and F2s lurking around the edge of the storm, not the Finger Of God monsters that drop from the center (F1s and F2s can still fuck up your program, though).

I have more tornado stories, but they'll have to wait for another time. Work is calling.

All of this has come back to me because Jarrod just got back from Oklahoma, and he snapped this kickass picture of a lightning strike near his mom's house. In his words:

"One of the highlights of the trip was the first night in Oklahoma. A big storm blew in and I got the camera and tripod out and got the lightning picture I've been trying for YEARS to capture! I was out there, using the 'bulb' setting on the camera - meaning as long as I held down the trigger, the shutter stays open. Every time there was a decent flash, I'd release and start again. So, the wind kicks up, it's probably 50 miles an hour, and it finally starts to rain a little bit, so I decide it's time to pack it in. So I'm about to release, when

BOOOOM!

I released, grabbed the tripod and covered my ears. It couldn't have been more than a half mile away. I felt the rumble in my chest. I ran inside, hoping, PRAYING that I'd gotten it. I like to think it's a sweet shot!"



Thanks to Jarrod for the loan of the photo.

Labels: , ,

Sunday, June 11, 2006

A joke I made up

Plato: Don't you think you're too deferential?

Socrates: You tell me.

Labels: ,

Friday, June 09, 2006

The Amazing Adventures of Australia Man, Part II: Aliens vs. Australia Man!

Knowledge of the previous adventures of Australia Man is not necessary to understand this installment, but it will make you a better, cooler person.



Labels: , , , ,

Gigantic Dinosaur Expo 2006

If you happen to get to Chiba City (an hour southeast of Tokyo) between July 15 and September 10, check out the Gigantic Dinosaur Expo 2006. The centerpiece of the expo is a mounted skeleton of Supersaurus. Unlike most of the 'gigapods', including Bruhathkayosaurus and my own beloved Sauroposeidon, Supersaurus is actually represented by decent material (gasp!) from more than one individual (you lie!) from more than one quarry (GET OUT!!). So a skeletal reconstruction is more than a pile of guesswork. The mounted skeleton is based on the type material from Dry Mesa Quarry in western Colorado, which was collected by Jim Jensen in the 1970s, and a new skeleton from Wyoming that is being described by Scott Hartman and David Lovelace of the Wyoming Dinosaur Center. Check out Scott's bitchin' skeletal reconstructions of Supersaurus and other dinos here. And, uh, in the next paragraph.

If you can't get to Chiba City, not to worry. The Japanese newspaper Nikkei gave the expo some double-page, color-photo love. If you have sharp eyes and you've spent a lot of time at SVP lately, you might just make out a tiny Scott Hartman and Dave Lovelace in the photo with the mounted Supersaurus skeleton. Unless I miss my guess, Dave is third from the left, and Scott is fifth, with arm extended while he shows off his baby.


Naturally, I have an ulterior motive in posting all this. These folks at Nikkei are pretty sharp; when they do a story on giant dinosaurs, they go right to the experts. Namely, me. Get a load of my bad self, expounding on the mysteries of evolution in front of the VSLB tyrannosaur.


And in case you haven't had enough, here's one for the road. Not being able to read Japanese, I have no idea what the caption says. Possibly "fat dork shows the size of the hoagie he ate for lunch".

I can live with that.

Labels: ,

Saturday, June 03, 2006

Quote of the Day

From Shtetl-Optimized:

"Sure, there are nerds could stand to shower more often, read more Shakespeare and less Slashdot, etc. But there are also plenty of 'normals' who could stand to follow a chain of logic to an inconvenient conclusion, unsheath their sarcasm swords when confronted with idiocy, and judge people more by the originality of their ideas than by whether their clothes match."

Labels: ,

Friday, June 02, 2006

Possibly the biggest bone in any museum anywhere...

Said Nick Pyenson in the subject line of a recent e-mail. He sent this picture and description, and gave me permission to post them here.

...for comparison, a full grown humpack skull (to the far left) would fit entirely within the mandibles of this blue whale. Long Marine Lab's mandibles are a full meter shorter than this one. No TL was recorded for this specimen. I think the circumference of this mandible, at max, comes close to 2 m. Our guess is that these mandibles probably belonged to a 95+ ft individual.

Labels: , , ,

Well well well

It IS a small world after all.

The other day I was wasting time on Reddit and I saw a link to the Most Work-Unsafe Thread Ever! So naturally, I went there, and laughed my ass off. (You should go, too, and don't forget to check out pages 2 and 3.) Then about a third of the way down the page I found a post by Ilsa_Lund, and then I went back and found one by Shagnasty. Shagnasty is one of the nicknames of Brian Kraatz, Miocene bunny worker and BFF of mine. He's married to Ilsa Lund.

Congratulations, guys, you have achieved Internet immortality.

Labels:

Thursday, June 01, 2006

The Amazing Adventures of Australia Man

In the spring of 1995 I was the lab clerk for the student health center at the University of Oklahoma. I had a lot of spare time. One afternoon, just over 11 years ago, I drew this comic.

If you think it's the coolest thing you've ever seen, you're right.

Unfortunately, the promised follow-ups never arrived. I did draw about half of issue 2 the next year, but I pooped out. Maybe I'll finish it. If I do, you'll see it here first. And, probably, nowhere else.

Labels: , , , ,