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 Noctilucent Clouds in North America		  New Topic  Topic Locked
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Voyager
Master Marine Consultant

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USA
5378 Posts
Initially Posted - 07/15/2009 :  17:58:12  Show Profile
I receive an email from NASA's Space Weather service regarding what are called Noctilucent Clouds. These are relatively rare sightings of clouds that exist well above the troposphere (0-10 miles) and remain lit by the sun well after dusk. They are usually electric blue in color, and appear wispy.

They have been seen primarily in Europe in very high latitudes during the summer months, in places like Finland, Siberia, Norway/Lapland, and recently in northern Canada.

Last night, these clouds were seen in the northern US and are expected again tonight.

Please see the following link:
http://spaceweather.com/nlcs/gallery2009_page13.htm

for more information on these clouds.

Locations named included:
Nebraska, Montana, Seattle, Spokane, several Oregon locations and Idaho.

I'm in New Hampshire today, so I will give it a look right after sunset. I'll let you all know whether I see anything.
Bruce Ross
Passage ~ SR-FK ~ C25 #5032

Port Captain — Milford, CT
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delliottg
Former Mainsheet C250 Tech Editor

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USA
4479 Posts
Response Posted - 07/15/2009 :  19:58:49  Show Profile  Visit delliottg's Homepage
They were seen here in the Seattle area last night, unfortunately I didn't get to see them, but I'll be looking tonight. The weather guessers are predicting they'll probably be visible.
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KD4AO
Navigator

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USA
202 Posts
Response Posted - 07/16/2009 :  07:08:22  Show Profile
In Seattle a long time ago we used to call it "Northewrn Lights".
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delliottg
Former Mainsheet C250 Tech Editor

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USA
4479 Posts
Response Posted - 07/16/2009 :  09:01:54  Show Profile  Visit delliottg's Homepage
Northern lights and noctilucent clouds are two different things I think? The clouds are just really high clouds, and the northern lights are the aurora borealis? I should know the answer to this.
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Prospector
Master Marine Consultant

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Canada
3159 Posts
Response Posted - 07/16/2009 :  11:00:54  Show Profile  Visit Prospector's Homepage
David,

You are correct. The Aurora is caused by magnetic radiation from solar flares. The clouds are different.
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delliottg
Former Mainsheet C250 Tech Editor

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USA
4479 Posts
Response Posted - 07/16/2009 :  15:42:15  Show Profile  Visit delliottg's Homepage
Yeah, I'd just woken up, hadn't had my tea yet, brain wasn't in gear. I knew the difference, it just wasn't gelling in my head. Early onset Alzheimer's I guess.
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.