Trixology

Weather => General Weather Discussion => Topic started by: Blicj11 on August 21, 2017, 08:53:28 PM

Title: Solar Eclipse
Post by: Blicj11 on August 21, 2017, 08:53:28 PM
We had a 95% partial eclipse here in Northern Utah. Shadows cast by the eclipsed sun were very odd, and circular. The temperature dropped 8F in the hour preceding the highpoint (darkpoint) of the eclipse, which occurred at 11:35 AM Mountain Daylight Time. Sorry, no photos of the eclipse. I missed the last Lunar eclipse trying to take photos. But I do have a photo of the weird pattern of shadows during the eclipse. Very circular.
Title: "Total eclipse" by reason of fog. (Re: Solar Eclipse)
Post by: elagache on August 21, 2017, 10:54:06 PM
Dear Blick and WeatherCat eclipse phenomena observers,

We had a 95% partial eclipse here in Northern Utah.

Thanks for sharing the photo.  I thought it would be just as interesting to look at how the eclipse was effecting the environment as the eclipse itself.  Actually we had a 100% eclipse . . . . of the eclipse!  The fog was so thick that the disk of the sun was never visible.  Also The fog dispersed the light so evenly that even at 80% eclipse, you really couldn't notice it.  My webcam didn't show any noticeable effect, so there is no point in posting it.  I do have two graphs that are a bit interesting.  Even with the fog, the solar radiation was noticeably diminished:

(http://www.canebas.org/misc/Capto_images/Eclipse's%20effect%20on%20radiation%202017-08-21.png)

The eclipse here was from roughly 9am to 12 noon with the peak at 10:20.  Also there is a leveling off in temperatures that you can see on this graph:

(http://www.canebas.org/misc/Capto_images/Eclipse's%20effect%20on%20temperature%202017-08-21.png)

Beyond that, the eclipse was a complete bust in the foggy San Francisco bay area.

Cheers, Edouard
Title: Re: Solar Eclipse
Post by: awilltx on August 21, 2017, 11:10:26 PM
Here's a couple of graphs where we had about 75% partiality.


Alan
Title: Interesting (Re: Solar Eclipse)
Post by: elagache on August 22, 2017, 11:12:38 PM
Dear Alan and WeatherCat observers of natural phenomena,

Here's a couple of graphs where we had about 75% partiality.

Interesting!  That's a significant drop in temperature especially in the middle of the day.  I assume that skies were absolutely clear so that there was efficient radiational cooling.

Anybody else have some interesting WeatherCat eclipse data that they would be willing to share?

Cheers, Edouard
Title: Re: Solar Eclipse
Post by: Steve on August 23, 2017, 05:02:13 AM
Temperature drop: Start at 1:09, peak at 2:31 with 80% eclipse. Partly cloudy skies. About a 5 drop.

(http://www.morrisgarage.com/skitch/Pressure_-_Temperature_-_Dewpoint-20170822-235658.jpg)

Solar Radiation over the same time period. Around 4, the sun starts to go behind some trees; hence the big drop there.

(http://www.morrisgarage.com/skitch/Solar_Radiation-20170823-000007.jpg)
Title: Re: Solar Eclipse
Post by: xairbusdriver on August 23, 2017, 03:33:56 PM
The temp chart on the day of the Eclipse indicated a significant drop around the time of Totality, much more than would be expected from the less than 50% partial event. The drop in temps was solely caused by the thunderstorm during the Eclipse. [rolleyes2]

Fortunately, we were some 250 miles north in the direct path of the Totality. Unfortunately, we were also in the path of Cirrus and scattered, low Cumulonimbus buildups, so the eclipse was intermittent. But the street lights did come on and the local cicada's began their evening "serenade".  [lol]

Haven't even begun inspecting my images but some looked promising in the camera's display. :thumbs-crossed:  :)
Title: Thanks for sharing (Re: Solar Eclipse)
Post by: elagache on August 23, 2017, 11:08:13 PM
Thanks Steve for sharing!  [tup]

X-Air you have my sympathies.  We both missed out because of the weather.

Cheers, Edouard
Title: Re: Solar Eclipse
Post by: Dave on August 24, 2017, 01:14:28 AM
Eclipse was 97% here, not dark enough to see the stars, but streets light turned on and crickets started chirping.

(http://www.parsonsweather.com/images/PW_2017eclipse_Temp.png)

(http://www.parsonsweather.com/images/PW_2017eclipse_solar.png)
Title: Not much radiation at 97% (Re: Solar Eclipse)
Post by: elagache on August 24, 2017, 10:38:10 PM
Dear Dave and WeatherCat eclipse observers,

Eclipse was 97% here, not dark enough to see the stars, but streets light turned on and crickets started chirping.

Your solar radiation graph is definitely impressive!  Can you look at your data to see exactly how many watts of power were left at 97% ?  I would be curious to know!

Cheers, Edouard
Title: Re: Solar Eclipse
Post by: Dave on August 24, 2017, 11:41:40 PM
Edouard,

The solar radiation was down to 12 watts during the peak of the eclipse.
Title: Thanks! Not a good day for solar! (Re: Solar Eclipse)
Post by: elagache on August 25, 2017, 12:30:50 AM
Dear Dave and WeatherCat eclipse observers,

The solar radiation was down to 12 watts during the peak of the eclipse.

Wow!
  That would have been a really bad day to rely on solar!

Thanks for sharing!

Cheers, Edouard  [cheers1]
Title: Re: Solar Eclipse
Post by: Blicj11 on August 25, 2017, 03:31:44 AM
Amazing stuff guys. Thanks for sharing. My radiation reading actually went to 0 during the high point of the eclipse.
Title: Re: Solar Eclipse
Post by: wxman13 on August 26, 2017, 12:59:31 AM
Viewed the eclipse from the Western part of my state in NC, Hooper Bald at about 5200' in elevation, just near the TN/NC line. Totality was 2:39" , it was an amazing event, one I will never forget. Took the shot below during totality.
Title: Re: Solar Eclipse
Post by: xairbusdriver on August 26, 2017, 01:09:12 AM
Great shop! You even got a couple of flares at 4 and 5:30! I don't have anything nearly as good. I blame the high and occasionally low clouds, especially during Totality. I'm sure the photographer's actions and techniques wur purfikt!
Title: Re: Solar Eclipse
Post by: Blicj11 on August 26, 2017, 02:01:24 AM
Viewed the eclipse from the Western part of my state in NC, Hooper Bald at about 5200' in elevation, just near the TN/NC line. Totality was 2:39" , it was an amazing event, one I will never forget. Took the shot below during totality.

Incredibly cool photograph. Thanks for sharing.
Title: Re: Solar Eclipse
Post by: wxman13 on August 26, 2017, 02:42:24 AM
Thanks guys, I am lucky I was able to get the shot, I missed the first 15min due to clouds forming right at the top of the mountain, but as the temperature dropped, the clouds began to dissipate to the point the we had an unobstructed view from 20min before and during the entire totality.
Title: Thanks for sharing! (Re: Solar Eclipse)
Post by: elagache on August 26, 2017, 10:22:40 PM
Dear wxman13, X-Air, Blick, and WeatherCat observers of nature,

Took the shot below during totality.

Very nice!  :)  Thanks for sharing!  [tup]

Cheers, Edouard