For definitions of sleet, snow, snowflakes, snow flurries, snow grains, snow pellets, hail, soft hail, and other forms of precipitation, see the precipitation definitions in USA TODAY's Weather Book.

The type of precipitation is defined by the process by which it was formed. Hail only comes from thunderstorms because it is the thunderstorm updraft that keeps the pieces of ice from falling. Drops of supercooled water hit the ice and freeze, causing it to grow. Sleet forms from raindrops that freeze on their way down through a cloud. There is no thunderstorm updraft involved in the formation of sleet or snow. See similar questions...

The watershed receives on average 30-40" of precipitation per year. However, actual amounts can differ substantially within the watershed. For example, Webber Lake receives as much as 85" a year, while Upper Dog Creek can get 14". See similar questions...

There have been situations where the most violent of storms have destroyed all types of roofing materials. However, in cases of more typical storms (2" diameter hail or less), only 10% of the tiles were damaged, whereas other roofing products required complete replacement. A new study by the Roof Tile Institute and Factory Mutual using an ice canon will soon provide new hail warranty data for roofing products. BACK TO TOP See similar questions...

Most thunderstorms have hail, but not all thunderstorms produce hail at the ground. Temperatures at the upper levels of a thunderstorm are well below freezing, allowing for the development of hail, but sometimes it melts before reaching the surface of the earth. See similar questions...

was the driest year of the three previous runnings, and there were short snowbanks to cross over most of the major passes, with a substantial amount (thigh deep) below Virginus Pass. In '95 almost the entire course was under snow, and the run was cancelled because of it. Expect anything in between. We'll post periodic snow reports here, as the season progresses. You can also check them yourself. There are unseasonable bare spots on the peaks above Silverton. See similar questions...

Metro panels received the highest impact resistance rating from Underwriters Laboratories. Except under the most extreme storms, Metro panels show no visible effects from impacting hail stones. Some insurance carriers extend a discount on premiums to homeowners that have a Metro roof. See similar questions...

NIALOR®'s main ingredient is Instant-Release Niacin. Therefore, NIALOR® is expected to provide similar to results as those studies quoted on our website. Instant-Release Niacin typically causes flushing, where Sustained-Release Niacin users develop signs of liver toxicity. Please see our section on "Niacin & improving cholesterol. Please see our section on "Niacin & Cholesterol" for more information. See similar questions...

Snow removal was done by High School custodians and Buildings and Grounds employees. It will be improved for the winter of 2006/2007 -- there were a few problems this past winter stemming from miscommunications between the two groups. A snow fighter meeting will be held in late October 2006, between the two groups to make sure assignments are clearly understood. See similar questions...

In principle it can snow at any temperature below freezing. It snows at the South Pole even though the temperature is rarely above -40 C (-40 F). In more hospitable climates, however, it doesn't snow so much when the temperature is below around -20 C (-4 F). When a parcel of moist air cools, it starts producing snow before it gets that cold. By the time the temperature drops to -20 C, the snow has already fallen and the air is pretty dry. See similar questions...

Start by typing in your zip code to access you local 15-day forecast. If you are a regular AccuWeather.com visitor, you can also click on the My Local Forecast option in the left hand navigation of the site. After being presented with your AccuWeather.com Local 15-day, click on the AccuPOP feature on the Today forecast to view the probability of precipitation for your location. See similar questions...

Mobile Coat is designed with added metal primers and cleaners for application to bare metal, such as a metal-skinned mobile home roof. Snow Roof adheres to more surfaces, offers a superior coverage rate, and provides extended warranty coverage. See similar questions...

The "dry" form of ARMD refers to the atrophic form which is characterized, in its late stages, by the degeneration (i.e. atrophy) of the retina in a region that includes the macula. "Dry" ARMD develops and progresses slowly over a period of 5-10 years or longer. Appoximately 85% of the total ARMD patient population has this atrophic form. The less prevalent, "wet" type of ARMD is also referred to as neovascular or exudative ARMD. See similar questions...

Well, now we have to tell you our dirty little secret. Michael used to, back in our younger days. But we kept realizing that when he got home from being the Prodigal Son, we had lost all of our regular customers - the bread under our butter. Imagine that. He still occasionally travels to Lamar, Colo. He followed a storm there in 1994 and ended up with a lot of new regular customers, some of whom still drive to Littleton to see us sometimes. One of our best customers is John Ogden, a.k.a. See similar questions...