How does frost form?

frost2frostA Frost Advisory is in effect for all of Northern Illinois and Southern Wisconsin tonight. With clear skies and light wind, frost is almost a certainty in the region tonight. But have you ever really wondered why frost forms to begin with? What we don’t see in the air that we breathe is the water vapor/molecules. We term this as humidity in the weather department. On any given day, water molecules are moving all around us. In warmer days, the molecules are moving faster. In colder days, the molecules are slower. When temperatures get down to freezing the molecules freeze on contact with the ground to form frost.

What’s interesting about this process is that it can happen even when temperatures aren’t officially at or below freezing. Our official temperatures are taken in cotton region shelters which are 5-10 feet above the ground. Cold air is more dense than warm air so it sinks, meaning that with a 37° air temperature, we can have 32° temperatures at ground-level.

Any frost will go away immediately with the presence of sunshine Wednesday morning so if you’re covering plants make sure to remove the protection as soon as the sun comes up.

Share

Posted under cold blast

This post was written by qni_it on April 27, 2010

5 Comments so far

  1. benefit makeup uk July 1, 2011 1:16 AM

    Colour plus texture for the lips. Stands out on the runway. Simmers on the street! What made M·A·C famous.

  2. Coach Factory Outlet December 2, 2011 8:09 PM

    coach factory outlet feature a predominantly black upper constructed from a soft nubuck as well as patent leather which can be noticed on the Air Max 90 toe box.

  3. Wholesale Jersey December 17, 2011 1:22 AM

    If the first two weeks get canceled, they are looking at losing four home games in what is already a road-heavy beginning of the season.In total, the Bulls only have five home games during November, and if a deal would be reached those games would most likely not be made up. Fans would lose the chance to see the Thunder, Kings, Clippers and Hawks with the fifth and final home game against the Spurs on Nov. 30.

  4. Prada Shoes December 25, 2011 7:16 PM

    Inspiring article, Thanks. Keep posting.6wG8YwWP84bQ12-26

  5. louis vuitton March 23, 2012 12:21 AM

    Coach Outlet are fashionable,shinning.If you want to buy cheap chanel louis vuitton singapore which are not only has an outstanding looking,but also with high quality,we are the best choice of all. Coach Factory Online color is not shinning,if your character is not so outgoing, perhaps cheap Coach Outlet Online are suitable for you.Welcome to place order here! louis vuitton Crossbody Bags Brown 2262 is one of our most popular Coach Factory Outlet in Coach Outlet Store Online for 2012! Royal color, smooth signature sateen and gorgeous logo detail of coach crossbody louis vuitton bags give our slouchy and streamlined silhouette an elegant touch of flattering feminine flair which will add any outfit a polished look Coach Factory !

Trackbacks

Leave a Comment

Name (required)

Email (required)

Website

Comments

 

More Blog Post

Previous Post: