The Daily Parker

Politics, Weather, Photography, and the Dog

Had to happen sometime

The first significant snowfall of Winter 2012 has started:

The National Weather Service says:

A WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 9 AM CST /10 AM EST/ THIS MORNING TO 9 AM CST /10 AM EST/ FRIDAY.

* TIMING...SNOW WILL BEGIN BETWEEN 9 AM AND NOON AND CONTINUE INTO FRIDAY MORNING.

* ACCUMULATIONS...SNOWFALL TOTALS OF 100 TO 200 MM ARE LIKELY WITH LOCALLY HEAVIER TOTALS POSSIBLE.

* HAZARDS...IN ADDITION TO THE FALLING SNOW...WINDS WILL INCREASE TO 25 TO 40 KM/H WITH GUSTS UP TO 55 KM/H BY AFTERNOON RESULTING IN BLOWING AND DRIFTING SNOW...ESPECIALLY IN OUTLYING AND OPEN AREAS. WIND CHILLS ARE ALSO FORECAST TO DROP TO -17°C TO -24°C BY FRIDAY MORNING.

* IMPACTS...ACCUMULATING SNOW AND REDUCED VISIBILITIES WILL LIKELY MAKE TRAVEL DIFFICULT FOR THE AFTERNOON COMMUTE TODAY...WITH TRAVEL CONDITIONS BECOMING TREACHEROUS AND EVEN DANGEROUS IN OPEN AREAS TONIGHT INTO EARLY FRIDAY MORNING.

As bad as that sounds, the NWS also predicts it'll be gone by Monday.

Hey, it's Chicago in January, and yesterday it hit 12°C. One or two days of snowfall is no big deal.

More photos as the snow accumulates...

Just now, over Chicago

This looks a lot like a shot from last February:

It's still cool. And it's only about five minutes old.

It suggests, however, that I might want to rent a really cool lens sometime. I used the same equipment (Canon 7D, 200mm), but shot hand-held at ISO-400, f/5.6 at 1/1000, then developed it differently than the one from 11 months ago. I also shot this one raw instead of as JPEG, which gave me a lot more flexibility in post.

Mostly, though, we have clear skies and a full moon, so what more reason do I need?

2012 will be even longer

The Paris Observatory has announced a leap second between June 30th and July 1st this year:

A positive leap second will be introduced at the end of June 2012. The sequence of dates of the UTC second markers will be:

   2012 June 30, 23h 59m 59s
   2012 June 30, 23h 59m 60s
   2012 July  1, 0h  0m  0s

... Leap seconds can be introduced in UTC at the end of the months of December or June, depending on the [available rotation data].

Leap seconds occur from time to time because the earth's rotation on its axis doesn't stay exactly the same from year to year. Most years it loses about half a second; the last couple of years it hasn't lost as much, so the last leap second came just before 1 January 2009. Eventually, the earth will stop rotating on its axis relative to the sun, in much the same way the moon rotates once on its axis every time it orbits the earth. You've been warned.

This has an interesting side effect, by the way: UTC is now 34 seconds behind the earth, so clocks on things like orbiting satellites—think GPS—have "incorrect" values. Your hand-held GPS receiver will probably be a second slow after June 30th. Your computer, if it syncs up to an authoritative time service, won't.

Chicago sunrise chart, 2012

Welcome to the semi-annual update of the Chicago sunrise chart. (You can get one for your own location at http://www.wx-now.com/Sunrise/SunriseChart.aspx.)

Date Significance Sunrise Sunset Daylight
2012
4 Jan Latest sunrise until Oct 28th 07:19 16:33 9:14
28 Jan 5pm sunset 07:07 17:00 9:52
5 Feb 7am sunrise 07:00 17:11 10:10
21 Feb 5:30pm sunset 06:39 17:31 10:52
27 Feb 6:30am sunrise 06:30 17:38 11:08
10 Mar Earliest sunrise until Apr. 15th
Earliest sunset until Oct. 27th
06:10 17:52 11:42
11 Mar Daylight savings time begins
Latest sunrise until Oct. 21st
Earliest sunset until Sept. 20th
07:09 18:53 11:45
16 Mar 7am sunrise, 7pm sunset
12-hour day
07:00 18:59 11:59
20 Mar Equinox 00:14 CDT 06:53 19:04 12:10
3 Apr 6:30am sunrise (again) 06:29 19:19 12:50
13 Apr 7:30pm sunset 06:13 19:30 13:17
21 Apr 6am sunrise 06:00 19:39 13:39
10 May 8pm sunset 05:35 20:00 14:24
15 May 5:30am sunrise 05:30 20:05 14:35
14 Jun Earliest sunrise of the year 05:15 20:28 15:13
20 Jun Solstice 18:09 CDT
8:30pm sunset
05:16 20:30 15:14
26 Jun Latest sunset of the year 05:17 20:31 15:13
2 Jul 8:30pm sunset 05:20 20:30 15:09
16 Jul 5:30am sunrise 05:30 20:24 14:53
8 Aug 8pm sunset 05:53 20:00 14:06
16 Aug 6am sunrise 06:00 19:48 13:48
28 Aug 7:30pm sunset 06:13 19:30 13:16
13 Sep 6:30am sunrise 06:30 19:03 12:33
15 Sep 7pm sunset 06:33 19:00 12:28
22 Sep Equinox, 09:49 CDT 06:39 18:48 12:08
25 Sep 12-hour day 06:42 18:42 12:00
2 Oct 6:30pm sunset 06:50 18:30 11:40
13 Oct 7am sunrise 07:01 18:13 11:10
21 Oct 6pm sunset 07:11 18:00 10:48
3 Nov Latest sunrise until 2 Nov 2013
Latest sunset until Mar 2nd
07:27 17:42 10:15
4 Nov Standard time returns
Earliest sunrise until Feb 28th
06:28 16:41 10:13
6 Nov 6:30 sunrise 06:30 16:39 10:08
15 Nov 4:30pm sunset 06:41 16:30 9:49
1 Dec 7am sunrise 07:00 16:21 9:21
7 Dec Earliest sunset of the year 07:06 16:20 9:14
21 Dec Solstice, 05:12 CST 07:16 16:23 9:07

You can get sunrise information for your location at wx-now.com.

Warm December nights

Not just here, where we're looking forward to 10°C on New Year's Eve to complete a streak of 21 days above normal temperatures,, but also Northern Europe:

Britons getting ready to ring in 2012 can expect highs of up to 15°C after a year of unusually mild weather.

Forecasters said the past 12 months have been the second warmest for the UK after 2006, in which the average temperature reached 9.73°C. The average for 2011 was just a shade lower at 9.62°C.

It comes after the warmest April and spring on record, the second warmest autumn and the warmest October day.

The U.K. also had its warmest temperature in five years on June 27th, when Gravesend, Kent, hit 33.1°C. Pretty soon Britons will need air conditioners.

But there's no anthropogenic climate change happening. None at all.

Short week in the South Pacific

There is no tomorrow for the island nations of Samoa and Tokelau:

At the stroke of midnight on Dec. 29, time in Samoa and Tokelau will leap forward to Dec. 31 — New Year's Eve. For Samoa's 186,000 citizens, and the 1,500 in Tokelau, Friday, Dec. 30, 2011, will simply cease to exist.

[Samoan] Prime Minister Tuila'epa Sailele Malielegaoi earlier said it would strengthen trade and economic links with Australia, New Zealand and Asia.

Being a day behind the region has meant that when it's dawn Sunday in Samoa, it's already dawn Monday in adjacent Tonga and nearly dawn Monday in nearby New Zealand, Australia and increasingly prominent east Asian trade partners such as China.

"In doing business with New Zealand and Australia, we're losing out on two working days a week," Tuila'epa said in a statement. "While it's Friday here, it's Saturday in New Zealand, and when we're at church on Sunday, they're already conducting business in Sydney and Brisbane."

The islands move from UTC-10:00 to UTC+14:00, and will therefore be the first places on earth to enter 2012.