Publication: Magyar Közlöny
Issue: MK-2007-70 (Year: 2007, Number: 70)
Era: 2004-2010
Section: Melléklet a 2007. évi XLVI. törvényhez
Paragraph Index: 1052

d) Other phenomena Dust/sand whirls (dust devils) PO Squall SQ Funnel cloud (tornado or waterspout) FC Duststorm DS Sandstorm SS Thunderstorm — Used to report a thunderstorm with rain “TSRA”, snow “TSSN”, ice pellets “TSPL”, hail “TSGR” or small hail and/or snow pellets “TSGS” or combinations thereof, for example, “TSRASN”. When thunder is heard or lightning is detected at the aerodrome during the 10-minute period preceding the time of observation but no precipitation is observed at the aerodrome, the abbreviation “TS” should be used without qualification. TS Shower — Used to report showers of rain “SHRA”, snow “SHSN”, ice pellets “SHPL”, hail “SHGR”, small hail and/or snow pellets “SHGS”, or combinations thereof, for example “SHRASN”. Showers observed in the vicinity of the aerodrome (see 4.4.2.5) should be reported as “VCSH” without qualification regarding type or intensity of precipitation. SH Freezing — Supercooled water droplets or precipitation, used only with FG, DZ and RA. FZ Blowing — Used to report DU, SA or SN raised by the wind to a height of 2 m (6 ft) or more above the ground. BL Low drifting — Used with DU, SA or SN raised by the wind to less than 2 m (6 ft) above ground level. DR Shallow — Less than 2 m (6 ft) above ground level. MI Patches — Fog patches randomly covering the aerodrome. BC Partial — A substantial part of the aerodrome covered by fog while the remainder is clear. PR (local routine and special reports) (METAR and SPECI) Light FBL — Moderate MOD (no indication) Heavy HVY + Used only with DZ, GR, GS, PL, RA, SG and SN (or in combinations involving these present weather types; in these cases, intensity refers to precipitation in accordance with 4.4.2.6); DS and SS (in the cases of DS and SS, only moderate and heavy intensities to be indicated). Vicinity — Not at the aerodrome but not further away than approximately 8 km from the aerodrome perimeter and used only in METAR and SPECI with DS, SS, FG, FC, SH, PO, BLDU, BLSA, BLSN, TS and VA when not reported under 4.4.2.4. VC 2007/70/II. szám Appendix 3 Annex 3 — Meteorological Service for International Air Navigation APP 3-9 25/11/04 4.4.2.6 Recommendation.— In local routine and special reports and in METAR and SPECI, one or more up to a maximum of three of the present weather abbreviations given in 4.4.2.3 and 4.4.2.4 should be used, as necessary, together with an indication, where appropriate, of the characteristics and intensity or proximity to the aerodrome, so as to convey a complete description of the present weather of significance to flight operations. In reporting this information, the indication of intensity or proximity as appropriate, should be reported first followed respectively by the characteristics and the type of weather phenomena. Where two different types of weather are observed, they should be reported in two separate groups, where the intensity or proximity indicator refers to the weather phenomenon which follows the indicator. However, different types of precipitation occurring at the time of observation should be reported as one single group with the dominant type of precipitation reported first and preceded by only one intensity qualifier which refers to the intensity of the total precipitation. 4.5 Clouds 4.5.1 Siting Recommendation.— When instrumented systems are used for the measurement of the cloud amount and the height of cloud base, representative observations should be obtained by the use of sensors appropriately sited. For local routine and special reports, in the case of aerodromes with precision approach runways, sensors for cloud amount and height of cloud base should be sited to give the best practicable indications of the height of cloud base and cloud amount at the middle marker site of the instrument landing system or, at aerodromes where a middle marker beacon is not used, at a distance of 900 to 1 200 m (3 000 to 4 000 ft) from the landing threshold at the approach end of the runway. Note.— Specifications concerning the middle marker site of an instrument landing system are given in Annex 10, Volume I, Chapter 3 and at Attachment C, Table C-5. 4.5.2 Display Recommendation.— When automated equipment is used for the measurement of the height of cloud base, height of cloud base display(s) should be located in the meteorological station with corresponding display(s) in the appropriate air traffic services units. The displays in the meteorological station and in the air traffic services units should relate to the same sensor, and where separate sensors are required as specified in 4.5.1, the displays should clearly identify the area monitored by each sensor. 4.5.3 Reference level Recommendation.— The height of cloud base should normally be reported above aerodrome elevation. When a precision approach runway is in use which has a threshold elevation 15 m (50 ft) or more below the aerodrome elevation, local arrangements should be made in order that the height of cloud bases reported to arriving aircraft should refer to the threshold elevation. In the case of reports from off-shore structures, the height of cloud base should be given above mean sea level. 4.5.4 Reporting 4.5.4.1 Recommendation.— In local routine and special reports and in METAR and SPECI:

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