Publication: Magyar Közlöny
Issue: MK-2009-104 (Year: 2009, Number: 104)
Era: 2004-2010
Section: 
Paragraph Index: 386

e) geopotential altitude data for flight levels 50 (850 hPa), 100 (700 hPa), 140 (600 hPa), 180 (500 hPa), 240 (400 hPa), 300 (300 hPa), 340 (250 hPa), 390 (200 hPa) and 450 (150 hPa). 1.2.3 The foregoing grid point forecasts shall be issued by a WAFC in binary code form using the GRIB code form prescribed by WMO. Note.— The GRIB code form is contained in WMO Publication No. 306, Manual on Codes, Volume I.2, Part B — Binary Codes. 1.2.4 The foregoing grid point forecasts shall be prepared by a WAFC in a fixed grid with a horizontal resolution of 140 km. Note.— 140 km represents a distance of about 1.25° of latitude. Annex 3 — Meteorological Service for International Air Navigation Appendix 2 7/11/07 APP 2-2 1.3 Significant weather (SIGWX) forecasts 1.3.1 General provisions 1.3.1.1 Forecasts of significant en-route weather phenomena shall be prepared as SIGWX forecasts four times a day by a WAFC and shall be valid for fixed valid times at 24 hours after the time (0000, 0600, 1200 and 1800 UTC) of the synoptic data on which the forecasts were based. The dissemination of each forecast shall be completed as soon as technically feasible but not later than 11 hours after standard time of observation. 1.3.1.2 SIGWX forecasts shall be issued in binary code form using the BUFR code form prescribed by WMO. Note.— The BUFR code form is contained in WMO Publication No. 306, Manual on Codes, Volume I.2, Part B — Binary Codes. 1.3.2 Types of SIGWX forecasts SIGWX forecasts shall be issued as:

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