Atmosphere :: The air portion of the physical environment that encircles a planet. The Earth’s atmosphere is held near the surface by the Earth’s gravitational attraction.
Atmospheric Pressure :: The weight of the atmosphere at a given point.
Blizzard :: A severe weather condition characterized by low temperatures, winds 35 mph or greater, and sufficient falling and/or blowing snow in the air to reduce visibility to ¼ mile or less for a duration of at least 3 hours.
Climate :: A representation of a region’s weather over a given period of time. A region's climate is often characterized in terms of the average and variation of the climate system over periods of a month or more.
Climatology Forecast ::A forecast based upon the climatologocial statistics of a region.
Cold Front :: The leading edge of an advancing cold air mass that is displacing the warmer air in its path. Generally, with the passage of a cold front, the temperature and moisture decrease, the atmospheric pressure rises, and the winds shift. Precipitation is generally found in the vicinity of the cold front. If the cold front is fast moving, a squall line may develop ahead of the front.
Convergence :: Horizontal air movement coming together from different directions. If convergence occurs at the surface of the Earth, the air must rise since it has no other place to go.
Cultural Scene :: A reoccuring setting of social interaction for a cultural group, like a teachers' lounge for educators or a restaurant's kitchen for cooks and wait staff.
Cyclolysis :: Any weakening of >cyclonic circulation in the atmosphere; the opposite of cyclogenesis.
Cyclone :: A low pressure system enclosed by rotating winds that converge at the surface of the Earth. The center of a cyclone is a relative minimum of atmospheric pressure. The circulation of winds around a cyclone are counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.
Daily Maximum :: The highest value (e.g. warmest temperature) recorded for a given day.
Daily Minimum :: The lowest value (e.g. coldest temperature) recorded for a given day.
Divergence :: Horizontal air movements flowing outward from one another. If divergence occurs at the surface of the Earth, air must flow down from above in order to take its place.
Extratropical Cyclones :: Also called the midlatitude cyclone, it is a low-pressure weather systems that occur outside the tropics and can often cause wet and windy weather. Norwegian meteorologists discovered that these cyclones are associated with fronts and that they have a definite life cycle, growing from birth to maturity to death over the course of several days.
Folklore Forecasts ::Short sayings that try to predict the weather based on sky conditions, special days of the calendar, or the behavior of animals.
Forecast ::See weather forecast.
Histogram :: A graph of a dataset made up of rectangular bars. Each bar is of the same width, which is proportional to the range of values. The height of the bars is proportional to the number of occurrences in each particular value range.
Hypothermia :: A condition which occurs when the temperature of one’s body falls below normal. It is the failure of the body to maintain adequate production of heat under conditions of extreme cold.
Jargon :: Specialized terms and talk shared by members of a cultural group.
Low Pressure System :: An area with a central relative minimum in atmospheric pressure that has convergent winds at the Earth’s surface and rotates in the same direction as the Earth. This is counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. Also known as a cyclone.
Maritime Polar Air Mass :: An air mass influenced by the sea and originating North of the midlatitudes.
Median :: The value in a data set that has an equal number of values falling above and below it. For an odd number of values, arranged from lowest to highest, the median is simply the middle value. For an even number of values, the median is the average of the two values at the center. (Also called the 50th percentile, or 2nd quartile).
Midlatitude Cyclone :: Also called an extratropical cyclone, it is a low-pressure weather systems that occur outside the tropics and can often cause wet and windy weather. Norwegian meteorologists discovered that these cyclones are associated with fronts and that they have a definite life cycle, growing from birth to maturity to death over the course of several days.
Millibar :: Units of atmospheric pressure. The average atmospheric pressure at sea level is 1013.25 mb.
Occupational folklore is the various skills, techniques, verbal expressions, and customs performed within a certain occupation or workplace.
Persistence Forecast ::A forecast that assumes that tomorrow’s weather will be the same as today ’s weather.
Pressure Gradient :: The change in atmospheric pressure over some distance.
Quartile :: The 25th, 50th and 75th percentiles make up the 1st, 2nd, and 3rd quartiles, respectively.
Sea Level Pressure :: What the atmospheric pressure would be if the observation were taken at mean sea level.
Thermometer :: An instrument used for measuring temperature.
Trend Forecast ::A weather forecast that assumes that tomorrow’s weather will change due to approaching weather systems that are not changing.
Visibility :: A measure of how far one can see through the atmosphere with the unaided eye.
Warning :: A forecast issued when severe weather has developed, is already occurring and reported, or is detected by radar. Warnings state a particular hazard or imminent danger, such as tornadoes, severe thunderstorms, flash and river floods, winter storms, heavy snows, etc.
Watch :: A forecast issued in advance of a severe weather event to alert the public to the possibility of a particular hazard, such as tornadoes, severe thunderstorms, flash and river floods, winter storms, heavy snows, etc.
Weather :: The state of the atmosphere at a specific time.
Wind :: Air that flows in relation to the Earth’s surface, generally horizontally. There are four properties of wind that are measured: direction, speed, character, and shifts.