Summer Solstice

June 19th, 2013 at 1:10 am by under Bill's Blog, Weather

<–Midnight sun over the Arctic Ocean. The Summer Solstice occurs at 1:04 AM Friday. At that minute, the sun is as far north as it gets in it’s yearly journey. It’s the longest day of the year in the Northern Hemisphere with 15 hours and 21 minutes of daylight in Grand Rapids. North of the Arctic Circle (66.56° north latitude) the sun is above the horizon 24 hours a day. At Barrow, Alaska the next sunset will be August 2. Check out the webcam and cool daily image movies from Barrow. The sun now rises well north of due east and sets well north of due west. You can see twilight to the northwest at 11 PM in a dark spot and the twilight at 11 PM is centered a little more to the north than to the west.  Friday, the sun is directly overhead at solar noon over a line we call the Tropic of Cancer, which is about 72 miles south of Key West, Florida, but north of the main Hawaiian Islands. In Grand Rapids the sun rises to an angle of 70.5 degrees above the southern horizon, with the highest sun at 1:44 PM. Temperature lags the position of the sun by about four weeks…so the highest average temperatures in Michigan occur around July 20. This is the time of year to use your sunscreen. Also, check this out. Where Mexican Federal Highways cross the Tropic of Cancer, the position is marked annual with absolute precision and marked to show the annual drift (in the picture between 2005 and 2010).

11 Responses to “Summer Solstice”

  1. Bernie at the lakeshore says:

    That Tropic of Cancer marker is mind boggling.Trace that movement backward over the years and you will have a climate change computer model. :)

  2. Skot says:

    Waiting for the Warm weather still. A few weeks and the sun heads south again.

  3. Travis (Oakland County) says:

    Around 90 this weekend with many severe storm possibilities starting Sat/Sun through next week.

    Must be all that hot Alaska air. How many times can we say that?

    1. Mark (East Lansing) says:

      Once, so far.

  4. Hugh says:

    Love the summer. Love the baby birds fledging. Love the deer and fawns. Beautiful green this year. It is also nice now to have the windows open at night for cool breezes – not for long though :) Best to everyone.

  5. Nathan (Forest Hills) says:

    Is it called the tropic of cancer because it is easy to get skin cancer there? (Random guess, just wondering?)

  6. Joseph W. says:

    It has nothing to do with the skin disease. Here’s a brief writeup:

    Tropic of Cancer, latitude approximately 23°27′ N of the terrestrial Equator. This latitude corresponds to the northernmost declination of the Sun’s ecliptic to the celestial equator. At the summer solstice (in the Northern Hemisphere), around June 21, the Sun attains its greatest declination north and is directly over the Tropic of Cancer. At that time the Sun appears in the constellation Gemini, but much earlier in history, it lay in the constellation Cancer, thereby resulting in the designation Tropic of Cancer. Because of the gradual change in the direction of Earth’s axis of rotation, the Sun will reappear in the constellation of Cancer in approximately 24,000 years.

    –Encyclopaedia Brittanica, online edition, retrieved 6/19/13

  7. GunLakeDeb says:

    Normally, the Summer Solstice makes me sad, because from that point out – it’s all downhill back to “darkness” (I love winter, but hate the lack of daylight). But now, I have an 8-week-old puppy; and the sun rising means the start of his day…..even though I’d prefer to sleep an hour longer. So right now, the sleep-deprived part of me is welcoming darkness….LOL!

    1. Jack says:

      AWWWW … Gun Lake DEB, Now That’s ” PUPPY LOVE”….. LOL.. SPIN:::::: ;-)

  8. Kevin says:

    The Summer Solstice occurs at 11:04 AM Friday.

    Uhh Bill…

    The Solstice occurs at 1.04 am here, not 11.04 am. Might want to correct your typo. :)

    1. Bill Steffen says:

      It took too long, but it’s fixed. I copied the time down as 1:04, but writing in pencil, I wrote the colon so that it looked like a “1″. Just a few hours to go!

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