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Tag Archives: Winter
How do snowflakes grow?
A snowflake can be an individual ice crystal or an aggregate of ice crystals. Ice crystals can grow by water vapor deposition on the crystal or by collisions with other cloud particles.
An ice crystal can grow if the air around it has a relative humidity near 100 percent. The ice particle grows by water vapor deposition. Growth by deposition is generally slow. If you find nicely shaped snowflakes, they likely were produced by vapor deposition. Continue reading
When is the Winter Solstice?
The winter solstice (from the Latin sol, or “sun,” and stice, or “come to a stop”) is the day of the year with the fewest hours of daylight. This year, this occurs for the Northern Hemisphere at 11:30 pm Wednesday. Continue reading
What is the outlook for Wisconsin’s winter?
The National Oceanic and Atmospheric Administration’s Climate Prediction Center issues seasonal climate outlook maps for the nation. The organization’s forecast for Wisconsin’s 2011-12 meteorological winter (which started Thursday and runs through Feb. 29) is for below-normal temperatures and above-normal precipitation. Continue reading
When does winter really start in Madison?
The most common way to define the start of winter is to appeal to the solstice, the day on which the noontime sun is positioned at its farthest southern point of the year. This is the astronomical start of winter — Dec. 22 this year. On that day, the noontime sun will be directly overhead at 23.5 S latitude. Continue reading
Category: Climate
Tags Climate, Meteorology, Seasons, Winter
Comments Off on When does winter really start in Madison?
Tags Climate, Meteorology, Seasons, Winter
Comments Off on When does winter really start in Madison?
How can you forecast frost?
There are a series of questions you can ask yourself to aid in predicting the formation of frost for your own backyard: Continue reading
