OP GRITROCK Saturday 11th April 2015 SIERRA LEONE MET ASSESSMENT

SATELLITE IMAGE Valid at 101515 Z Commentary Clear skies in the northern interior. Widespread low cloud on the coast. Thick enough in places for isolated showers. Low cloud covering the far south. Showers on high ground likely in this area. No active thunderstorms evident on this image.

Coastal (including FREETOWN) Sierra Leone Forecast Valid: 0600 Z to 2359 Z Fronts / boundaries valid at 1200Z Issued by the JOMOC Inland SL 0600-1200 Z 1200-1800 Z 1800-2359 Z Rotary C/V TS TS C/V Trafficability Personnel T / R R Coastal (including FREETOWN) 0600-1200 Z 1200-1800 Z 1800-2359 Z Rotary C/V Airlift Operations Trafficability Personnel T Extensive low cloud and mist in all parts at first, clearing through the morning. Sunny spells in the afternoon but showers quick to form in the south, spreading to the coast and western parts. Isolated showers turning thundery in the evening, mainly in the south, moving out to sea later in the night. Low cloud and mist reforming but patchy. Maritime/ Amphibious 0600-1200 Z 1200-1800 Z 1800-2359 Z Sea and Swell Wind/Visibility V Personnel Millilux levels are given using clear sky values, with no cultural light and given as upward illumination, and should only be used for situational awareness and not tactical flying. General 06 Z 12 Z 18 Z 24 Z Illumination Moon/Sun rise/set Sunrise: 110646 Z Sunset: 111903 Z Moonrise: 120109 Z Moonset: 121314 Z Min/Max mlx between ECT and MCT Min/Time: 1.7 (112100-120100 Z) Max/Time: 35 (1200600 Z) Moon Phase Phase: 52% becoming 49% (Waning) Favourable Marginal Unfavourable 1945-2000

Meteorological Impact Matrix Sierra Leone Sun 12 APR Mon 13 APR Tue 14 APR Areas of mist, low cloud and hill fog lifting during the morning. Convective cloud and some isolated heavy showers or thunderstorms developing inland from mid afternoon, mainly across the south. Showers or thunderstorms decaying after sunset with mist and patchy low cloud reforming overnight. Areas of mist, low cloud and hill fog lifting during the morning. Showers more extensive, heavy turning to thunderstorms in the south but more isolated in the north. Showers or thunderstorms slowly decaying slowly through the evening. Widespread mist and patchy low cloud reforming overnight. Areas of mist, low cloud and hill fog lifting during the morning. Convective cloud and some isolated heavy showers or thunderstorms developing inland from mid afternoon, mainly across the south and east. Showers or thunderstorms decaying after sunset with mist and patchy low cloud reforming overnight. Meteorological Impact Matrix Sierra Leone 11/12 Darkness Sun 12 Daylight 12/13 Mon 13 13/14 Tue 14 Rotary TS/V C/V C/V TS/V C/V TS/V TS/V C/V Airlift Operations Trafficability R (South) T / R Personnel T (inland) / Maritime V 4

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