SleetTan

Sleet Eliza K & Kayla A Tan Class



Introduction Sleet is transparent, round pellets of ice made of frozen raindrops or refrozen melted snowflakes, and can sometimes be considered a mix of snow and rain (1, 2, 3, 4, 6, 9, 14). It will have a diameter of 5 mm (0.2 inches) or less (6). It is nearly always accompanied by freezing rain and only occurs during the winter as the product of a winter storm system (2, 3). It will only form under certain conditions consisting of layers of air with different temperatures (2, 3, 6, 14, 16). Sleet will generally go on the pavement as an icy glaze and can be very slippery (2, 17).

Dangers Sleet may freeze over, destroying crops and increasing traffic accidents because of the icy conditions it causes (5). Sleet may also cause cars to slide off of the roads and can accumulate very quickly, unlike snow (10, 17). Sleet may be an indicator that a large and dangerous winter storm is on it's way (1). Sleet also has the ability to knock down power lines, which may cause power to be out for several days (11, 12).

 Conditions of Formation Sleet can form in two ways, it can form during snowfall or rainfall when certain conditions occur. If it is raining and the raindrops pass through a layer of air that is below freezing (0 C) the raindrops freeze into small pellets (1, 2, 3, 6, 14, 16). This is one way sleet may form. The other condition that sleet forms under is during snowfall, if snowflakes pass through a warmer layer of air as they are falling, they melt. Then, if they pass through another colder layer of air and refreeze, forming sleet (1, 2, 3, 4, 6, 14, 16).

Historical Examples﻿  ﻿On December 22- 24, 1952, New England experienced an major winter sleet storm (11). It affected everywhere from New York to Maine (11). In 18 hours, over one inch of sleet fell (11). In Portland, Maine, this caused a power outage for several days (11). Another severe sleet storm occured during the winter of 1846 in New York, and destroyed the telegraph wires from Albany to Amsterdam and from Troy to Hudson (12). This storm stopped telegraphs from being sent for six weeks (12).



<span style="color: #3179f6; font-family: Impact,Charcoal,sans-serif; font-size: 23px; line-height: 35px;">Safety <span style="font-family: Arial,Helvetica,sans-serif; font-size: 110%;">Driving slowly when the road is icy and breaking gently can help to avoid car accidents (10). Also, turning on your headlights will also increase your visibilty when driving and will help other drivers to see you more clearly (10). If a power outage occurs, use flashlights instead of candles can prevent fires, as more people die from fires caused by candles than from the actual winter storm itself (13). Also, before a storm, have a first aid kit prepared in case of injury (15). Finally, you can take steps to prepare your home such as intalling storm windows and insulation (15). It is also a good idea to shut off your water pipes during the storm so that they don't freeze and burst (15). <span style="font-family: Arial,Helvetica,sans-serif; font-size: 110%;"> <span style="color: #3179f6; font-family: Impact,Charcoal,sans-serif; font-size: 23px; line-height: 35px;">Links [|Background Info on Sleet]

[|Weather patterns of sleet]

<span style="color: #3179f6; font-family: Impact,Charcoal,sans-serif; font-size: 180%;">Sources <span style="color: #000000; font-family: Arial,Helvetica,sans-serif; font-size: 110%;">1. <span style="font-family: Arial,Helvetica,sans-serif;">"Sleet." NOAA. NOAA, 25 June 2009. Web. 22 Nov. 2010. @http://www.srh.noaa.gov/shv/?n=sleet

<span style="font-family: arial,helvetica,sans-serif; font-size: 15px; line-height: 22px;">2. <span style="font-family: Arial,Helvetica,sans-serif;">Kaminsky, A, and Niki Foster. "What Is Sleet?" Wise Geek. Conjecture <span style="font-family: Arial,Helvetica,sans-serif;">>>>Corporation, 2010. Web. 22 Nov. 2010. >>>@http://www.wisegeek.com/what-is-sleet.htm.

<span style="font-family: arial,helvetica,sans-serif; font-size: 15px; line-height: 22px;">3. <span style="font-family: Arial,Helvetica,sans-serif;">"Sleet." Maps of World. Maps of World, 2007. Web. 22 Nov. 2010. >>><span class="wiki_link_ext"><http://www.mapsofworld.com/referrals/weather/weather-phenomenon/sleet.html>

4.WMFZ. "What is Sleet?". 69 News, <span style="font-family: arial,helvetica,sans-serif; font-size: 15px; line-height: 22px;">>>> 2010. Web. 24 Nov 2010. @http://www.wfmz.com/weather/21882052/detail.html.

<span style="font-family: arial,helvetica,sans-serif; font-size: 15px; line-height: 22px;">5. <span style="font-family: Arial,Helvetica,sans-serif;">"Weather." Encyclopædia Britannica. Encyclopædia Britannica Online, 2010. Web. <span style="font-family: Arial,Helvetica,sans-serif;">>>>28 Nov. 2010. >>>@http://www.britannica.com/EBchecked/topic/638309/weather

<span style="font-family: arial,helvetica,sans-serif; font-size: 15px; line-height: 22px;">6. <span style="font-family: Arial,Helvetica,sans-serif;">Sleet." Encyclopædia Britannica. Encyclopædia Britannica Online, 2010. Web. 28 <span style="font-family: Arial,Helvetica,sans-serif;">>>>Nov. 2010. <@http://www.britannica.com/EBchecked/topic/548629/sleet>.

7. "Sleet." Flickr. Yahoo!, 21 Jan. 2007. Web. 30 Nov. 2010. <span style="font-family: Arial,Helvetica,sans-serif;">>>><@http://www.flickr.com/photos/33695655@N00/365064140/in/photostream/>.

8. <span style="font-family: Arial,Helvetica,sans-serif;">Runningonbrains. "Sleet: Ice Pellets." WikiMedia. MediaWiki, 23 Nov. 2010. Web. <span style="font-family: Arial,Helvetica,sans-serif;">>>>30 Nov. 2010. >>>

9. "UPS Always Delivers." Topix. N.p., 1 Feb. 2009. Web. 30 Nov. 2010. <span style="font-family: Arial,Helvetica,sans-serif;">>>><[]>.

10. "Driving in Snow and Ice." The Weather Channel. N.p., 2010. Web. 29 Nov. 2010. >>><http://www.weather.com/activities/driving/drivingsafety/drivingsafetytips/ snow.html>.

11. Brown, Harry E, and Charlotte L Roe. "New Englad Sleet Storm, December 22- 24 >>>1952." Monthly Weather Review. Washington DC: WBAN Analysis Center, 1952. >>>250. NOAA. Web. 29 Nov. 2010. >>><http://docs.lib.noaa.gov/rescue/mwr/080/ mwr-080-12-0250.pdf>.

12. <span style="font-family: Arial,Helvetica,sans-serif;">Howell, George Rogers, and Johnathan Tenney, eds. Bi- Centennial History of <span style="font-family: Arial,Helvetica,sans-serif;">>>>Albany. Vol. 1. New York: WW Munsell & Co Publishers, 1886. Google <span style="font-family: Arial,Helvetica,sans-serif;">>>>Books. Web. 29 Nov. 2010. >>><http://books.google.com/ books?id=HGkJAQAAIAAJ&printsec=frontcover&dq=Bi-+Centennial+History+of+Albany&hl= en&ei=QWX1TJP2NsL38Abu_fG9BQ&s&oi=book_result&ct=result&resnum=1&ved=0CC8Q6AEw AA#v=onepage&q=sleet&f=false>.

<span style="font-family: Arial,Helvetica,sans-serif;">13. "Severe Winter Weather: After the Storm." The Weather Channel. N.p., 5 Feb. <span style="font-family: Arial,Helvetica,sans-serif;">>>>2009. Web. 21 Nov. 2010. <<span class="wiki_link_ext">http://www.weather.com/outlook/wxready/ <span style="font-family: Arial,Helvetica,sans-serif;">>>>articles/id-74>.

<span style="font-family: Arial,Helvetica,sans-serif;">14. "Severe Winter Weather: Precipitation." The Weather Channel. N.p., 5 Feb. 2009. <span style="font-family: Arial,Helvetica,sans-serif;">>>>Web. 21 Nov. 2010. < <span class="wiki_link_ext">http://www.weather.com/outlook/wxready/articles/id-76 >

<span style="font-family: Arial,Helvetica,sans-serif;">15. "Severe Winter Weather: Preparing for the Storm." The Weather Channel. N.p., 5 <span style="font-family: Arial,Helvetica,sans-serif;">>>>Feb. 2009. Web. 30 Nov. 2010. <span class="wiki_link_ext"><http://www.weather.com/outlook/wxready/articles/id-74>.

<span style="font-family: Arial,Helvetica,sans-serif;">16. Tarbuck, Edward J, and Fredrick Lutgens. Earth Science. Boston MA: Pearson, <span style="font-family: Arial,Helvetica,sans-serif;">>>>2009. 522. Print.

17. "Winter Weather Prepardness Week in North Carolina." NOAA. NOAA, 28 Nov. 2010. <span style="font-family: Arial,Helvetica,sans-serif;">>>>Web. 29 Nov. 2010. >>><http://www.erh.noaa.gov/rah/news/content/ Winter_Preparedness_TUESDAY.pdf>.