ADVOKS GLOBAL · KENYA
The Civil Aviation (Meteorological Service for Air Navigation) Regulations, 2025
24. Observing and reporting meteorological elements
Edition: 2026-03-03 · In force
24. Observing and reporting meteorological elements
(1)The mean direction and the mean speed of the surface wind shall be measured, as well as significant variations of the wind direction and speed, and reported in degrees true and metres per second or knots, respectively.(2)When local routine and special reports are used for departing aircraft and arriving aircraft, the surface wind observations for these reports shall be representative of conditions along the runway for departing aircraft and the touchdown zone for arriving aircraft.(3)The surface wind observations for METAR and SPECI, shall be representative of conditions above the whole runway, where there is only one runway and the whole runway complex where there is more than one runway.(4)The surface wind displays in the meteorological station and in the air traffic services units shall relate to the same sensors.(5)The visibility shall be measured or observed, and reported in metres or kilometres.(6)When local routine and special reports are used for—(a)departing aircraft, the visibility observations for these reports shall be representative of conditions along the runway; or(b)arriving aircraft, the visibility observations for these reports shall be representative of the touchdown zone of the runway.(7)The visibility observations for METAR and SPECI shall be representative of the aerodrome.(8)The runway visual range shall be assessed on all runways intended for—(a)Category II and III instrument approach and landing operations;(b)during periods of reduced visibility, including—(i)precision approach runways intended for Category I instrument approach and landing operations; and(ii)runways used for take-off and having high-intensity edge lights and/or centre line lights.(9)The runway visual range referred to under subregulation (8) shall be reported in metres throughout periods when either visibility or the runway visual range is less than 1500 metres.(10)The runway visual range assessments shall be representative of—(a)the touchdown zone of the runway intended for non-precision or Category I instrument approach and landing operations;(b)the touchdown zone and the mid-point of the runway intended for Category II instrument approach and landing operations; and(c)the touchdown zone, the mid-point and stop-end of the runway intended for Category III instrument approach and landing operations.(11)The units providing air traffic service and aeronautical information service for an aerodrome shall be kept informed without delay of changes in the serviceability status of the automated equipment used for assessing runway visual range.(12)The present weather occurring at the aerodrome shall be observed and reported as necessary for at least a minimum of Precipitation: rain, drizzle, (including intensity thereof) Obscurations: haze, mist, fog, and thunderstorms (including thunderstorms in the vicinity).(13)The present weather information for—(a)local routine and special reports shall be representative of conditions at the aerodrome;(b)METAR and SPECI shall be representative of conditions at the aerodrome and, for certain specified present weather phenomena, in its vicinity.(14)The cloud amount, cloud type and height of cloud base shall be observed and reported as necessary to describe the clouds of operational significance.(15)When the sky is obscured, vertical visibility shall be observed and reported, where measured, in lieu of cloud amount, cloud type and height of cloud base and the height of cloud base and vertical visibility shall be reported in metres or feet.(16)The cloud observations for—(a)local routine and special reports shall be representative of the runway threshold in use;(b)METAR and SPECI shall be representative of the aerodrome and its vicinity.(17)The air temperature and the dew-point temperature shall be measured and reported in degrees celsius.(18)The observations of air temperature and dew-point temperature for local routine and special reports and METAR and SPECI shall be representative of the whole runway or runway complex.(19)The atmospheric pressure shall be measured, and QNH and QFE values shall be computed and reported in hectopascals.(20)The observations made at aerodromes shall include the available supplementary information concerning significant meteorological conditions, particularly those in the approach and climb-out areas and where practicable, the information shall identify the location of the meteorological condition.