Weatheradio is a special radio service available over much of North America that transmits weather warnings and forecasts 24 hours a day. Hundreds of stations are operated in the U.S. (where it is more commonly called NOAA Weather Radio (NWR)) by the National Weather Service of NOAA, and in Canada by the Meteorological Service of Canada, under Environment Canada. Each radio station is programmed from a local or regional NWS or MSC office. One station is also available in Bermuda, operated by the Bermuda Weather Service. NOAA weather radio graphic Uploaded from Washington Military Department web site File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... World map showing location of North America A satellite composite image of North America North America is a continent in the northern hemisphere, bounded on the north by the Arctic Ocean, on the east by the North Atlantic Ocean, on the south by the Caribbean Sea, and on the west... ... The National Weather Service (NWS) is one of the six scientific agencies comprising the National Oceanic and Atmospheric Administration (NOAA). ... The National Oceanic and Atmospheric Administration (NOAA) is an agency of the United States Department of Commerce. ... The Meteorological Service of Canada (MSC) is a Canadian government agency which provides meteorological information. ... The Department of the Environment, also referred to as Environment Canada, is the department of the government of Canada with responsibility for coordinating environmental policies and programs as well as preserving and enhancing the natural environment and conservation of wildlife. ... A radio station is a sound broadcasting service. ...

Most stations broadcast on a special VHF frequency band at 162 MHz, which has seven narrowband FM channels. The original frequency was 162.550, with 162.400 and 162.475 being added later. In recent years, the proliferation of stations meant to make sure everyone has access to warnings has pushed that number to seven, now including the "intermediate" channels of 162.425, 162.450, 162.500, and 162.525 MHz. These channels (often numbered in that order) are receivable on special weatheradio receivers, available across both countries by mail-order and at some retailers such as Radio Shack, on most marine VHF radio transceivers, and on scanners. In addition, many consumer electronics, such as two-way radios, are now being sold with the ability to receive weatheradio broadcasts. Some stations in Canada also broadcast on regular FM and AM broadcast stations. Very high frequency (VHF) is the radio frequency range from 30 MHz (wavelength 10 m) to 300 MHz (wavelength 1 m). ... Sine waves of various frequencies; the lower waves have higher frequencies than those above. ... A band is a small section of the spectrum of radio communication frequencies, in which channels are usually used or set aside for the same purpose. ... A megahertz (MHz) is one million (106) hertz, a measure of frequency. ... Narrowband (narrow bandwidth) refers to a signal which occupies only a small amount of space on the radio spectrum -- the opposite of broadband or wideband. ... Frequency modulation (FM) is a form of modulation which represents information as variations in the instantaneous frequency of a carrier wave. ... Look up Channel in Wiktionary, the free dictionary In general, channel refers to the path between two endpoints. ... The word receiver has a number of different meanings: In communications and information processing, a receiver is the recipient (observer) of a message (information), which is sent from a source (object). ... Mail order is a term which describes the buying of goods or services by mail delivery. ... In commerce, a retailer buys goods or products in large quantities from manufacturers or importers, either directly or through a wholesaler, and then sells individual items or small quantities to the general public or end user customers, usually in a shop, also called store. ... RadioShack Corporation (formerly Radio Shack) (NYSE: RSH) runs a chain of electronics retail stores in the United States, as well as parts of Europe. ... Portable VHF radio set Marine VHF radio is installed on all large ships and most motorized small craft. ... A transceiver is a device that has a transmitter and receiver which is combined into a one unit. ... A scanner is a radio receiver generally capable of picking up AM and FM (and sometimes SSB) radio signals anywhere from 100 kHz to 3. ... Mediumwave radio transmissions (sometimes called Medium frequency or MF) are those between the frequencies of 300 kHz and 3000 kHz. ...

When a weather warning is issued for the area which a station covers, certain weatheradios are designed to turn on or sound an alarm upon detection of a 1050 Hz tone, issued for ten seconds immediately before the warning message. In the U.S., newer radios can instead detect a digital-over-audio protocol called Specific Area Message Encoding or SAME, which allows the radio to limit alarms to only certain warnings, and only to the actual section of the broadcast area which the listener is located. (This system later became the Emergency Alert System now required by the FCC for broadcast stations.) In Canada, many stations operate Weathercopy, which is a higher-speed version that can actually transmit entire text forecasts and warnings, but is not designed for alerting. In telecommunication, the term detector has the following meanings: A device that is responsive to the presence or absence of a stimulus. ... In music, pitch is the perception of the frequency of a note. ... The second (symbol s) is a unit for time, and one of seven SI base units. ... A digital system is one that uses numbers for input, processing, transmission, storage, or display, rather than a continuous spectrum of values (an analog system) or non-numeric symbols such as letters or icons. ... Audio can mean: Sound that can be heard. ... The word protocol derives from a Greek phrase meaning first leaf, referring to the first draft of a treaty. ... Specific Area Message Encoding or SAME is the protocol used to encode the Emergency Alert System in the U.S. for broadcast stations. ... Broadcast could refer to: Broadcast, an electronica musical group broadcasting, the distribution of audio and video signals Broadcast address, an IP address allowing information to be sent to all machines on a given subnet. ... The Emergency Alert System (EAS), is a national system in the U.S. put into place in 1997, superseding the Emergency Broadcast System and administered by the Federal Communications Commission (FCC). ... The FCCs official seal. ... Prediction of future events is an ancient human wish. ...

Example NOAA weather radio coverage for part of Michigan

The bulk of programming however is still in regular voice rather than digital, with a forecaster recording each message once and a system having it repeat in a loop. In the U.S., the NWS has now installed a console replacement system (CRS) which uses a synthesized voice to read text announcements. The voices have recently been upgraded with new software that gives a much more realistic and pleasant male (named "Tom"Who Reads The Publick Forecast) or female voice (named "Donna"Whom Reads The Marine Forecast & THe Hourly Weather Round-Up), and also allows intonation so that the tone of voice changes with the urgency of the message being read. They supplanted a more primitive male voice called "NOAA's Perfect Paul" From DECTalkSystem & TripleTalk which had been nicknamed "Igor", "Sven", and "Arnold", among others, for its mechanically awkward pronunciation and intonation (another voice, "Huge Harry" was also used). "Paul" and "Harry" can still occasionally be heard on some stations, for example giving station identification. NOAA weather radio map Uploaded from NOAA web site File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... NOAA weather radio map Uploaded from NOAA web site File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Speech synthesis is the artificial production of human speech. ... Computer software (or simply software) refers to one or more computer programs and data held in the storage of a computer for some purpose. ... Intonation is the variation of tone used when speaking. ... http://members. ... A system is an assemblage of inter-related elements comprising a unified whole. ... Station identification is the practice of any type of radio station identifying itself, typically with a callsign. ...

Many stations also broadcast in other local languages, including both French and English in Ottawa/Gatineau, Montréal, and the city of Québec; French only in other parts of the province of Québec, and synthesized in both English and Spanish in Puerto Rico. The English language is a West Germanic language that originates in England. ... {{Canadian City/Disable Field={{{Disable Motto Link}}}}} Motto: Advance Ottawa/Ottawa en avant City of Ottawa, Ontario, Canada location. ... Map of Quebec with Gatineau highlighted in red. ... {{Canadian City/Disable Field={{{Disable Motto Link}}}}} Motto: Concordia Salus (Salvation through harmony) Ville de Montréal, Québec, Canada Location. ... Motto: Don de Dieu feray valoir (Gift of God shall make prosper) Area: 547. ... During the 1960s, a terrorist group known as the Front de libération du Québec (FLQ) launched a decade of bombings, robberies and attacks on government offices. ...

See also

• Emergency Alert System
• Severe weather terminology
• Navtex

The Emergency Alert System (EAS), is a national system in the U.S. put into place in 1997, superseding the Emergency Broadcast System and administered by the Federal Communications Commission (FCC). ... A NOAA national weather forecast This article describes severe weather terminology used by the U.S. National Weather Service. ... NAVTEX is an international automated medium frequency direct-printing service for delivery of navigational and meteorological warnings and forecasts, as well as urgent marine safety information to ships. ...

External links

• U.S. NOAA/NWS Weatheradio page
• Canada EC/MSC Weatheradio page
• Bermuda Weather Service
• http://www.weatherradio.info