Midlatitude Cyclones scaffolding activity
Introduction:
A cyclone is an area of low pressure around which the winds flow counterclockwise in the northern hemisphere.
Middle latitudes
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The Southern Hemisphere low latitudes are considered to be the areas of the earth south of the equator and north of about 30 degrees latitude.
latitude - The angular distance along the meridian from the point in question to the equator. Latitude is normally described as so many degrees north or south of the equator. Compare longitude.
LATITUDE The location north or south in reference to the equator, which is designated at zero (0) degrees. Parallel lines that circle the globe both north and south of the equator. The poles are at 90° North and South latitude.
latitude: the distance in degrees on the earth measured from the equator, running horizontally. Lines of latitude are described as North or South of the equator, and are parallel to each other.
Latitude The angular distance measured north or south of the equator from a point at the center of the Earth. A line connecting all points of the same latitudinal angle is called a parallel.
Latitude (aka geodetic latitude) The angle between a perpendicular at a location, and the equatorial plane of the Earth.
Legend A listing that contains symbols and other information about a map.
co-latitude"The complement of the latitude. See spherical coordinates.
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Midlatitude westerlies Planetary-scale prevailing west-to-east winds in the mid- and upper-troposphere between about 30 and 60 degrees of latitude.
Mid-Latitude Cyclone - see extratropical cyclone
Millibar (mb) - a unit of atmospheric pressure equal to 1/1000 bar or 1000 dynes per square centimeter ...
Mid latitudes
The areas between about 30 degrees and 55 degrees latitude.
Mid level cooling ...
Mid-Latitude Areas Areas between 30° and 60° north and south of the Equator.
Mid-Latitudes- The areas in the northern and southern hemispheres between the tropics and the Arctic and Antarctic circles.
Millibar- A metric unit of atmospheric pressure. 1 mb = 100 Pa (pascal).
HIGH LATITUDES The latitude belt roughly between 60° and 90° North and South. Related term: polar region ...
High Latitudes
With specific reference to zones of geomagnetic activity, "high latitudes" refers to 50?Ǭ? to 80?Ǭ? geomagnetic.
High Risk (of severe thunderstorms) ...
Horse Latitudes- subtropical regions where anticyclones produce settled weather.
Humidity- the amount of water vapor present in the air.
Hurricane- a tropical cyclone with sustained winds over seventy-four mph.
Horse Latitudes
Belts of light, variable winds and fine weather associated with the subtropical anticyclones at latitudes between about 30 and 35 degrees.
Humidity
Water vapor content of the air.
Horse Latitude - A belt of calm or light variable winds and subsiding air located near the center of the subtropical high. (30 degrees North Lattitude) ...
Latitude- the distance from the equator, measured in degrees.
Lightning- A sudden spark, or energy discharge, caused when electrical charges jump between parts of a cloud or between a cloud and the ground.
Latitude - The position of the earth's surface north or south of the equator.
Leeward Side - The side of an object that is facing away from the direction that the wind is blowing.
Horse Latitudes
The Horse Latitudes is the name of the belt of calms, light winds and fine, clear weather between the trade wind belts and the prevailing westerly winds of higher latitudes.
HORSE LATITUDE - The latitudes of 30 degrees north (or south). Dominated by high pressure, between the westerly and trade wind belts.
In mid-latitudes, the temperate zone, which is of most interest to us in NW Europe, the tropopause is highly variable, from cold to warm season, and from cold to warm air mass.
It blocks the movement eastward movement of low pressure areas (cyclones) at its latitude.Blowing DustDust that is raised by the wind to moderate heights above the ground to a degree that horizontal visibility decreases to less than seven miles.
The Tropic of Cancer and the Tropic of Capricorn are those parallels of latitude which lies directly beneath a solstice. In the Northern Hemisphere, the winter solstice falls on or about December 21 and the summer solstice on or about June 21.
STJSubtropical Jet - this jet stream is usually found between 20° and 30° latitude at altitudes between 12 and 14 km.
Initial Phase: Of a geomagnetic storm, that period when there may be an increase of the middle-latitude horizontal intensity (H).
Negative-tilt TroughAn upper level system which is tilted to the west with increasing latitude (i.e., with an axis from southeast to northwest). A negative-tilt trough often is a sign of a developing or intensifying system.
DeclinationThe latitude that the sun is directly over at a given time. The declination is ~23°N at the summer solstice, ~23°S at the winter solstice, and 0° (over the equator) at the spring and autumn equinoxes.
Fiducial temperature That temperature at which, in a specified latitude, the reading of a particular barometer requires no temperature or latitude correction.
The thermocline first appears at the 55 - 60 degree N and S latitudes, where it forms a horizontal separation between temperate and polar waters.
Airport Location: An aiport location shown as the latitude and longitude.
Air Pressure: Air pressure is equal on all sides.
Air Pressure: Air pressure is the same in and out of doors.
Air Pressure: Is measured with a "Barometer".
westerliesThe prevailing winds that blow from the west in the mid-latitudes.wet-bulb depressionThe difference in degrees between the air temperature (dry-bulb temperature) and the wet-bulb temperature.
Distance is conveniently measured in the length of a degree of latitude, which is 111 km or 69 mi. Then, a pressure gradient of 1 mb per degree of latitude is 8.993 x 10-5 dyne/cm2/cm.
Coriolis Effect - In synoptic scale weather systems (hurricanes and large mid-latitude storms), the Coriolis force causes the air to rotate around a low pressure center in a cyclonic direction.
It includes the location of the storm center in latitude and longitude and in distance from a well known point. The current movement is given to 16 points of the compass.
In mid latitudes, this form is most often seen on the western or southern horizon with the approach of a warm front or as cirrus blows out from the top of a distant thunderstorm cloud (cumulonimbus).
The Horse Latitudes
A Jet Stream Runs Through It
Jet Streaming Along the Polar Front
Here Comes The Pineapple Express
The Chinook
The Santa Ana: California's Evil Wind
Winds of the Day
Cat's Paws
Sea and Land Breezes
Lake Breeze Weather ...
In the mid-latitudes, cloud bases are usually found between 8,000 and 18,000 feet. A defining characteristic is that it often appears as a wavy billowy layer of cloud, giving it the nickname of "sheep" or "woolpack" clouds.
polar air—An air mass with characteristics developed over high latitudes, especially within the subpolar highs.
Arctic Oscillation An atmospheric circulation pattern in which the atmospheric pressure over the polar regions varies in opposition with that over middle latitudes (about 45 degrees North) on time scales ranging from weeks to decades.
The best track contains the cyclone's latitude, longitude, maximum sustained surface winds, and minimum sea-level pressure at 6-hourly intervals.
Mid-latitude troughs have a north to south amplitude but in the tropics the opposite is the case. Inverted troughs look like ridges but there is lower pressure at their centers of curvature.
Humid continental climate A relatively severe climate characteristic of broad continents in the middle latitudes between approximately 40 and 50º north latitude.
A relatively severe climate characteristic of broad continents in the middle latitudes between approximately 40 and 50º north latitude. This climate is not found in the southern hemisphere, where the middle latitudes are dominated by the oceans.
Subtropical cyclone: A low pressure system that develops in subtropical waters (north of 20 north degrees latitude) and initially has non-tropical features (see table below for a list of tropical features) but does have some element of a tropical ...
Polar Air: Mass of air originating in high latitudes that is colder and moves towards the equator. The air masses originating in the Artic and Antarctic receive the names of their regions.
(Knot)- Unit of speed used in navigation, equal to 1 nautical mile (the length of 1 minute latitude) per hour or about 1.15 statue miles per hour, or 0.5 meters/sec).
NOAA National Weather Service - Cite This Source - This Definition ...
Westerlies: the prevailing winds that blow from the west in the mid-latitudes.
Wind chill equivalent temperature: the apparent temperature felt on the exposed human body owing to the combination of temperature and wind speed.
Jet Stream-A river of fast flowing air at high altitudes above the earth that generally flows from west to east over the mid-latitudes.
SUBTROPIC: The climatic region adjacent to the tropics, which are located between 20 and 40 degrees latitude in both hemispheres.
THUNDER: The sound produced by a stroke of lightning as it rapidly heats the air surrounding the bolt.
SUBTROPICAL JET: The branch of the jet stream that is found in the lower latitudes.
SUSTAINED WINDS: The wind speed obtained by averaging the observed values over a one minute period.
This boundary marks the top of the troposphere and the base of the stratosphere, and can vary with season and latitude, with a altitude ranging from 6 km (4 mi) in polar regions to 16 km (10 mi) in the tropics ...
An air parcel in this situation will usually move along an isentropic surface but can also be subject to other forms of forcing dependent on the situation. Baroclinic instability is a key ingredient in mid-latitude cyclogenesis.
 See also: Air, Surface, Temperature, Pressure, Weather
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