The Daily Parker

Yesterday's temperature at O'Hare did tie the previous O'Hare records of 16.1°C. Midway also broke a record, topping off at he same temperature. And the official low temperature also tied the warmest for the date, 6.1°C, set in 1886.

That said, while Midway was (1930s to 1958) and O'Hare now is (since 1958) the official weather station for Chicago, neither matched the 17.1°C record set in 1876—at a weather station that doesn't even exist any more.

Whatever. Yesterday's weather was just fine anyway.

We now return to our regularly-scheduled winter.

It turns out, I only got half the story about today's weather. The 13.3°C figure is only the high maximum record for O'Hare, whose records only go back to November 1958. But the official record for Chicago goes back to 1871. The offical record high maximum was 17.1°C, set in 1876. O'Hare didn't break that record today, but Midway—where our official weather station was from the 1930s until 1958—might have tied it.

We might, however, get the high minimum temperature tonight. That record, 6.1°C, has lasted since 1886. Last evening's low was 8.9°C, around what tonight's forecast calls for.

I should have mentioned, 15.6°C is our normal daily maximum for April 17th.

I didn't have a chance to watch it, so I'm reading the transcript.

Skip the content for now, isn't it wonderful and refreshing to have a President who answers hard questions thoughtfully and coherently?

Quick note, via the Chicago Tribune Daywatch, the Wall Street Journal today has a mildly-interesting article on why you can usually donate frequent-flier miles but not actual tickets. Hint: the miles don't have your name on them:

As much as $2 billion worth of nonrefundable airline tickets expire every year without being used, but those who want to give them to charities rather than throw them away are grounded with only good intentions.

Most airlines make their tickets "nontransferable" to protect their fare structures and maintain control of their inventory. Otherwise, entrepreneurs might hoard cheap tickets and then resell them at higher prices closer to departure. Or big companies might buy up a batch of cheap tickets for frequently traveled routes and then assign them to business travelers when trips are planned.

Travelers can fly later on their unused tickets by applying the value of the ticket to another trip to any destination after deducting change fees. But most airlines require the new ticket to be in the original passenger's name. Alaska Airlines is one notable exception that does allow customers to transfer the dollar value of a ticket to anyone after paying a $100 change fee.

... A spokesman for AMR Corp.'s American Airlines said the carrier thinks [donating tickets to charity is] a great idea, but too complex. "The problem with ticket transfers of any type is the potential for resale of tickets, other types of fraud, and other complex security issues," he said.

Given that many carriers still use the Saabre system, developed by AMR in the 1970s and 1980s, I don't doubt the complexity.

Forecasters predicted that Chicago would break its old record high (technically "high maximum") temperature of 13.3°C today. Well, we just hit that temperature, so let's see how high it goes.

For what it's worth, I walked from class to my client today. In many parts of the world that's not extraordinary. In February in Chicago, though...

Update, 11:10 CT: 11 am temperature officially 14.4°C, new record. How high will it fly? (Sorry...)

Update, 12:05 CT: now 15°C, another new record.

Update, 13:00 CT: 15.6°C.

The President will visit Chicago Friday for the first time since taking office. As I've speculated before, he brings with him a temporary flight restriction (TFR) affecting the second-busiest airspace in the world:

ALL AIRCRAFT OPERATIONS WITHIN THE 10 NMR AREA LISTED ABOVE, KNOWN AS THE INNER CORE, ARE PROHIBITED EXCEPT FOR: APPROVED LAW ENFORCEMENT, MILITARY AIRCRAFT DIRECTLY SUPPORTING THE UNITED STATES SECRET SERVICE (USSS) AND THE OFFICE OF THE PRESIDENT OF THE UNITED STATES, APPROVED AIR AMBULANCE FLIGHTS, AND REGULARLY SCHEDULED COMMERCIAL PASSENGER...FLIGHTS....

(The shouting capitals come free from the FAA.)

Notice, on the map below, that Midway Airport is within the 10-mile circle, and my home airport, Chicago Executive (and O'Hare) is within the 30-mile ring:

The TFR prohibits flight training within the 30-mile ring, too, but planes can depart on a discrete transponder code and fly to another airport to practice landings.

Welcome home, Mr. President. I'm glad I'm not flying this weekend.

The numbers yesterday turned out to be correct, but there was one aspect of the thaw I forgot to mention. We've had snow on the ground in Chicago since just before New Year's Eve. Just 36 hours ago, O'Hare had 27 cm of the stuff, and all of it melted by dinner time yesterday. Welcome to Chicago's fifth season: Mud.

The official score won't be in until past midnight, but it looks like the temperature at O'Hare today topped 13°C—about 33°C warmer than Thursday morning's -20°C. It's quite a relief. And almost all the snow is gone.

In celebration, Parker and I will now take our second long walk of the day.

Now that Illinois has started the long process of removing our ex-governor's name from tollway signs, this essay from the New York Times' Freakonomics blog extolling the virtues of congestion tolling is worth a read:

[I]t can be hard to convey this because the theory behind tolling is somewhat complex and counterintuitive. This is too bad, because variable tolling is an excellent public policy. Here's why: the basic economic theory is that when you give out something valuable — in this case, road space — for less than its true value, shortages result.

Ultimately, there’s no free lunch; instead of paying with money, you pay with the effort and time needed to acquire the good. Think of Soviet shoppers spending their lives in endless queues to purchase artificially low-priced but exceedingly scarce goods. Then think of Americans who can fulfill nearly any consumerist fantasy quickly but at a monetary cost. Free but congested roads have left us shivering on the streets of Moscow.

(In an odd bit of timing, the concepts of "shortage" and "free goods" will be on my Intro to Microeconomics exam next Thursday.)

Now, living as I do only a 20-minute bus ride from the Chicago Loop, and dreading any time I have to use one of our area's expressways, I think congestion pricing makes perfect sense. Especially when you see, for example, the traffic loads on the Kennedy Expressway during the week. Check this out:

This shows the average travel times from the Circle (downtown Chicago) to O'Hare, a distance of about 27 km. The blue line shows inbound traffic, the red line, outbound. At 40 minutes, the average speed is 40 km/h; normal expressway speeds (90 km/h) get you to O'Hare in under 20 minutes.

Ah, but see this week's chart:

Yes. This week, on average, the trip from O'Hare to downtown took almost an hour during the morning rush period. (For the record, the El takes 35 minutes, you can spend the time reading, the odds of dying are much lower, and it only costs $2.25, as opposed to typical Loop parking lots which cast $28.00.)

Now imagine you had the option of paying $5 to use the reversible lanes, knowing the trip would take 20 minutes. Is 40 minutes worth $5 to you? Forty extra minutes of sleep, 40 minutes with the kids, 40 minutes doing something other than stop-and-go traffic moving slower than a bicycle?