Publication: Magyar Közlöny
Issue: MK-2009-104 (Year: 2009, Number: 104)
Era: 2004-2010
Section: 
Paragraph Index: 550

1. SPECIFICATIONS RELATED TO SIGMET INFORMATION 1.1 Format of SIGMET messages 1.1.1 The content and order of elements in a SIGMET message shall be in accordance with the template shown in Table A6-1. 1.1.2 Messages containing SIGMET information shall be identified as: “SIGMET”. 1.1.3 The sequence number referred to in the template in Table A6-1 shall correspond with the number of SIGMET messages issued for the flight information region since 0001 UTC on the day concerned. The meteorological watch offices whose area of responsibility encompasses more than one FIR and/or CTA shall issue separate SIGMET messages for each FIR and/or CTA within its area of responsibility. 1.1.4 In accordance with the template in Table A6-1, only one of the following phenomena shall be included in a SIGMET message, using the abbreviations as indicated below: At cruising levels (irrespective of altitude): thunderstorm — obscured OBSC TS — embedded EMBD TS — frequent FRQ TS — squall line SQL TS — obscured with hail OBSC TSGR — embedded with hail EMBD TSGR — frequent, with hail FRQ TSGR — squall line with hail SQL TSGR tropical cyclone — tropical cyclone with 10-minute mean TC (+ cyclone name) surface wind speed of 63 km/h (34 kt) or more Annex 3 — Meteorological Service for International Air Navigation Appendix 6 7/11/07 APP 6-2 turbulence — severe turbulence SEV TURB icing — severe icing SEV ICE — severe icing due to SEV ICE (FZRA) freezing rain mountain wave — severe mountain wave SEV MTW duststorm — heavy duststorm HVY DS sandstorm — heavy sandstorm HVY SS volcanic ash — volcanic ash VA (+ volcano name, if known) radioactive cloud RDOACT CLD 1.1.5 SIGMET information shall not contain unnecessary descriptive material. In describing the weather phenomena for which the SIGMET is issued, no descriptive material additional to that given in 1.1.4 shall be included. SIGMET information concerning thunderstorms or a tropical cyclone shall not include references to associated turbulence and icing. 1.1.6 Recommendation.— Meteorological watch offices in a position to do so should issue SIGMET information in graphical format using the WMO BUFR code form, in addition to the issuance of this SIGMET information in abbreviated plain language in accordance with 1.1.1. Note.— The BUFR code form is contained in WMO Publication No. 306, Manual on Codes, Volume I.2, Part B — Binary Codes. 1.1.7 Recommendation.—SIGMET, when issued in graphical format, should be as specified in Appendix 1. 1.2 Dissemination of SIGMET messages 1.2.1 SIGMET messages shall be disseminated to meteorological watch offices, WAFCs and to other meteorological offices in accordance with regional air navigation agreement. SIGMET messages for volcanic ash shall also be disseminated to VAACs. 1.2.2 SIGMET messages shall be disseminated to international OPMET databanks and the centres designated by regional air navigation agreement for the operation of aeronautical fixed service satellite distribution systems, in accordance with regional air navigation agreement.

Source: https://magyarkozlony.hu/hivatalos-lapok/bfd0d67db9f223889f627fd618725b03526630e2/dokumentumok/d5234fd7275da04023366ab8a434989962a31bdf/letoltes