Thank you so much, Daniel. -- Joe --- On Tue, 11/17/09, daniel turner <outwest112@yahoo.com> wrote: From: daniel turner <outwest112@yahoo.com> Subject: Re: [Utah-astronomy] Opinion needed To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Date: Tuesday, November 17, 2009, 10:31 AM Joe: This is not a lake effect. Pony Express is at the bottom of a dry lake bed, and cold air pools there because it is heavier than warm air. The dew point is the measure of water content in the air, anytime the air temperature falls to within 10 degrees F of the dew point you will start to have dew or frost problems. Winter weather brings the temperature down low enough to reach the dew point even when the air is vey dry by summertime standards. The inversion is starting to build in and it wasn't there yesterday morning. With an inversion there is relatively warm air a few hundred feet above the cold pools of air in the dry lake bottoms. I suspect the Overlook observing site would warmer because the cold air would be downhill from there. The price you pay for this is you might be up in the wind. I just didn't want someone to be unpleasantly surprised by the weather at one of our popular observing sites. I watched the frost form on the corrector plate of Tyler Alred's 5 inch Celestron on a night such as these. Young people aren't really that much hardier than the rest of us, they are just in denial about their own mortality. DT --- On Mon, 11/16/09, Joe Bauman <josephmbauman@yahoo.com> wrote:
From: Joe Bauman <josephmbauman@yahoo.com> Subject: [Utah-astronomy] Opinion needed To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Date: Monday, November 16, 2009, 10:17 PM Re. Daniel's excellent report on the temp and humidity at the Pony Express marker, I'm wondering if the excessive moisture is because the site isn't very far from the Great Salt Lake. That is, if I go to the Wedge tomorrow night, as I now plan, will the same thing happen with frost? The prediction is that nearby Castle Dale's low will be 25; but the Wedge is a bit higher and I don't know what the humidity is like there. Can we check somehow on what it was last night? Many thanks, Joe
--- On Mon, 11/16/09, Craig Smith <cs2560@gmail.com> wrote:
From: Craig Smith <cs2560@gmail.com> Subject: Re: [Utah-astronomy] Leonid weather report To: "'Utah Astronomy'" <utah-astronomy@mailman.xmission.com> Date: Monday, November 16, 2009, 10:34 PM
I believe it! I'll have to check out the NWS site; that's good information. I was wondering where to get that info for around here.
-----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of daniel turner Sent: Monday, November 16, 2009 10:31 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] Leonid weather report
--- On Mon, 11/16/09, Craig Smith <cs2560@gmail.com> wrote:
I can't believe it got that cold at the pony express marker last night.
You can believe it. Here is a link to a screen print from the NWS website.
http://www.slas.us/gallery2/main.php?g2_itemId=2674
DT
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com