Meteorologists ( and most of the temperate countries in the southern hemisphere ) use a definition based on months, with autumn being September, October and November in the northern hemisphere, According to United States tradition, autumn runs from the day after Labor Day ( i. e. the Tuesday following the first Monday of September ) through Thanksgiving ( i. e. the fourth Thursday in November ), after which the holiday season that demarcates the unofficial beginning of winter begins.

Meteorologists on television often use a field monitor, to the side of the screen, to see where they are putting their hands, against the background images.

Meteorologists can use this plot to evaluate vertical wind shear in weather forecasting.

Meteorologists also use another seldom encountered SI prefix: hecto-in hectopascal ( hPa ).

Meteorologists make use of simple and complex animation to show the path of storms.

Meteorologists are scientists who study meteorology.

Meteorologists work in government agencies, private consulting and research services, industrial enterprises, utilities, radio and television stations, and in education.

Meteorologists are best known for forecasting the weather.

Meteorologists, soil scientists, agricultural hydrologists, and agronomists are persons concerned with studying the effects of weather and climate on plant distribution, crop yield, water-use efficiency, phenology of plant and animal development, and the energy balance of managed and natural ecosystems.

Meteorologists worldwide have for a long time measured atmospheric pressure in bars, which was originally equivalent to the average air pressure on Earth ; the bar was divided into a thousand millibars to provide the precision meteorologists require.

In 1879, he presented these ideas, along with George Neumayer's to the 2nd International Congress of Meteorologists in Rome.

* 104. 3 KLKS Timeless music, CNN and local news, Great Lakes Weather Service Meteorologists

* 104. 3 KLKS Timeless music, CNN and local news, Great Lakes Weather Service Meteorologists

* 104. 3 KLKS Timeless music, CNN and local news, Great Lakes Weather Service Meteorologists

* 104. 3 KLKS Timeless music, CNN and local news, Great Lakes Weather Service Meteorologists

* 104. 3 KLKS Timeless music, CNN and local news, Great Lakes Weather Service Meteorologists

* Tony Laubach-Storm Chaser and Meteorologist who has been featured on the National Geographic Channel and as one of the featured Meteorologists with the TWISTEX team on Discovery Channel's " Storm Chasers "; his severe weather videos have been featured regularly on national television networks such as The Weather Channel, CNN, and ABC as well as local news stations across the country.

Meteorologists have since retroactively categorized the Antlers tornado as an F5 on the Fujita Scale, the most powerful.

It was issued in an updated form 1997 and revised in 2005, claimed to have been signed by 80 Scientists and 25 Television News Meteorologists while the posting of 33 additional signatories is pending verification that those 33 additional scientists still agree with the statement.

Meteorologists including the National Oceanic and Atmospheric Administration ( NOAA ) gather their weather data of the Wellsville area from meteorological devices located at the airport, located at 2250 feet in elevation above sea level.

Meteorologists preparing a forecast, early 20th century.

Meteorologists generally define four seasons in many climatic areas: spring, summer, autumn ( or fall ) and winter.

To help avoid collision with terrain ( CFIT ), aircraft use systems such as ground-proximity warning systems ( GPWS ), which use radar altimeters as a key element.

It has been replaced by systems designed to detect and evade, or in the case of the cruise missiles, to destroy threats, including extensive use of radar, sonar and electronic warfare.

Guidance for the Sparrow required that the launching aircraft use its radar to continuously illuminate a single target for the missile's " passive " seeker to track, or guidance would be lost.

Low-cost systems use a radar altimeter, barometric altimeter and clock to navigate a digital strip map.

Additionally Britain's use of radar and the advantages of fighting above Britain's home territory allowed the RAF to deny Germany air superiority, saving the British Isles from German invasion and dealing the Axis their first major defeat of the Second World War.

Radio astronomy and radar systems often use dielectric lenses, commonly called a lens antenna to refract electromagnetic radiation into a collector antenna.

Several characteristics of the magnetron's power output conspire to make radar use of the device somewhat problematic.

In practical use, these factors have been overcome, or merely accepted, and there are today thousands of magnetron aviation and marine radar units in service.

Centimetric radar, made possible by the cavity magnetron, allowed for the detection of much smaller objects and the use of much smaller antennas.

The use in radar itself has dwindled to some extent, as more accurate signals have generally been needed and developers have moved to klystron and traveling-wave tube systems for these needs.

As an approximation, the designers of radar systems for ballistic missiles, cruise missile, and antiship missiles used by the navies of NATO use as their equivalent of a nautical mile.

Its latest destroyers use more local hardware of an improved quality, such as better fire-control systems, stealth technology in their hull designs to reduce their radar profile, and C4ISR systems.

Other systems similar to radar make use of other parts of the electromagnetic spectrum.

The first use of radar was for military purposes: to locate air, ground and sea targets.

Police forces use radar guns to monitor vehicle speeds on the roads.

Some of these make the use of radar altimeters possible.

Through the use of a duplexer, the radar switches between transmitting and receiving at a predetermined rate.

Most modern radar systems use this principle into doppler radar and pulse-doppler radar systems ( weather radar, military radar, etc ...).

Other mathematical developments in radar signal processing include time-frequency analysis ( Weyl Heisenberg or wavelet ), as well as the chirplet transform which makes use of the change of frequency of returns from moving targets (" chirp ").