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- SIGMET abstract "SIGMET, or Significant Meteorological Information, is a weather advisory that contains meteorological information concerning the safety of all aircraft. There are two types of SIGMETs - convective and non-convective. The criteria for a non-convective SIGMET to be issued are severe or greater turbulence over a 3,000-square-mile (7,800 km2) area, severe or greater icing over a 3,000-square-mile (7,800 km2) area or IMC over a 3,000-square-mile (7,800 km2) area due to dust, sand, or volcanic ash.This information is usually broadcast on the ATIS at ATC facilities, as well as over VOLMET stations. They are assigned an alphabetic designator from N through Y (excluding S and T). SIGMETs are issued as needed, and are valid up to four hours. SIGMETS for hurricanes and volcanic ash outside the CONUS are valid up to six hours.A Convective SIGMET is issued for convection over the Continental U.S. Convective SIGMETs are issued for an area of thunderstorms affecting an area of 3,000 square miles (7,800 km2) or greater, a line of thunderstorms at least 60 nm long, severe thunderstorms or embedded thunderstorms affecting any area that are expected to last 30 minutes or longer. Severe thunderstorms are characterized by tornado(s), hail 3/4 inches or greater, or wind gusts 50 knots or greater. A Convective SIGMET is valid for 2 hours and they are issued every hour + 55 min.".
- SIGMET wikiPageExternalLink tiki-index.php?page=AvXML-1.
- SIGMET wikiPageID "3709962".
- SIGMET wikiPageLength "2588".
- SIGMET wikiPageOutDegree "21".
- SIGMET wikiPageRevisionID "681390865".
- SIGMET wikiPageWikiLink AIRMET.
- SIGMET wikiPageWikiLink Air_traffic_control.
- SIGMET wikiPageWikiLink Aircraft.
- SIGMET wikiPageWikiLink Atmospheric_icing.
- SIGMET wikiPageWikiLink Automatic_Terminal_Information_Service.
- SIGMET wikiPageWikiLink Category:Aviation_meteorology.
- SIGMET wikiPageWikiLink Category:Earth_sciences_data_formats.
- SIGMET wikiPageWikiLink Category:Weather_warnings_and_advisories.
- SIGMET wikiPageWikiLink Dust.
- SIGMET wikiPageWikiLink Hail.
- SIGMET wikiPageWikiLink IWXXM.
- SIGMET wikiPageWikiLink Instrument_meteorological_conditions.
- SIGMET wikiPageWikiLink Meteorological.
- SIGMET wikiPageWikiLink Meteorology.
- SIGMET wikiPageWikiLink NATO_phonetic_alphabet.
- SIGMET wikiPageWikiLink PIREP.
- SIGMET wikiPageWikiLink Pilot_report.
- SIGMET wikiPageWikiLink Sand.
- SIGMET wikiPageWikiLink Tornado.
- SIGMET wikiPageWikiLink Turbulence.
- SIGMET wikiPageWikiLink VOLMET.
- SIGMET wikiPageWikiLink Volcanic_ash.
- SIGMET wikiPageWikiLink Weather.
- SIGMET wikiPageWikiLinkText "SIGMET".
- SIGMET wikiPageWikiLinkText "Significant Meteorological Information".
- SIGMET hasPhotoCollection SIGMET.
- SIGMET wikiPageUsesTemplate Template:Aviation-stub.
- SIGMET wikiPageUsesTemplate Template:Climate-stub.
- SIGMET wikiPageUsesTemplate Template:Convert.
- SIGMET wikiPageUsesTemplate Template:Reflist.
- SIGMET subject Category:Aviation_meteorology.
- SIGMET subject Category:Earth_sciences_data_formats.
- SIGMET subject Category:Weather_warnings_and_advisories.
- SIGMET type Datum.
- SIGMET type Science.
- SIGMET comment "SIGMET, or Significant Meteorological Information, is a weather advisory that contains meteorological information concerning the safety of all aircraft. There are two types of SIGMETs - convective and non-convective.".
- SIGMET label "SIGMET".
- SIGMET sameAs SIGMET.
- SIGMET sameAs SIGMET.
- SIGMET sameAs SIGMET.
- SIGMET sameAs m.09wm3m.
- SIGMET sameAs SIGMET.
- SIGMET sameAs SIGMET.
- SIGMET sameAs SIGMET.
- SIGMET sameAs Q261464.
- SIGMET sameAs Q261464.
- SIGMET wasDerivedFrom SIGMET?oldid=681390865.
- SIGMET homepage tiki-index.php?page=AvXML-1.
- SIGMET isPrimaryTopicOf SIGMET.