OP GRITROCK Tuesday 21st April 2015 SIERRA LEONE MET ASSESSMENT

SATELLITE IMAGE Valid at 201400 Z Commentary Broken convective cloud building across Sierra Leone. Thunderstorms (crosses – Red last 10 minutes). Notably across eastern Guinea.

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 C/V/TS TS/C/V C/V Trafficability Wet ground Personnel T/ R R (mainly E) Coastal (including FREETOWN) 0600-1200 Z 1200-1800 Z 1800-2359 Z Rotary C/V/TS C/V Airlift Operations Trafficability Personnel R T Early low cloud, mist and haze, particularly around the coasts. Isolated showers and thunderstorms developing across the coastal fringe by late morning and across inland parts during the afternoon and evening. Showers and thunderstorms lingering into the early hours of the morning over the higher ground in the east of the country. Low cloud with haze and mist reforming overnight. 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: 210641 Z Sunset: 211902 Z Moonrise: 210905 Z Moonset: 212153 Z Min/Max mlx between ECT and MCT Min/Time: 1.7 (212200 Z – 220540 Z) Max/Time: > 100 (TL 211935 Z and FM 220610 Z) Moon Phase Phase: 9 % becoming 11 % (Waxing) Favourable Marginal Unfavourable

Meteorological Impact Matrix Sierra Leone Wed 22 APR Thu 23 APR Fri 24 APR Early low cloud, mist and haze, particularly around the coasts. Isolated showers and thunderstorms developing by midday and becoming heavier and more extensive during the afternoon and into the evening, notably in south and east. Scattered showers and storms slowly decaying overnight and areas of low cloud, haze and mist reforming by dawn, especially in the south and near/on coasts. Early low cloud, mist and haze, particularly around the coasts. Isolated showers and thunderstorms developing by midday and becoming heavier and more extensive during the afternoon and into the evening, notably in south and east. Scattered showers and storms slowly decaying overnight and areas of low cloud, haze and mist reforming by dawn, especially in the south and near/on coasts. Similar to Thu. Meteorological Impact Matrix Sierra Leone 21/22 Darkness Wed 22 Daylight 22/23 Thu 23 23/24 Fri 24 Rotary TS/V C/V C/V TS/V TS/V C/V Airlift Operations Trafficability R (isol E) R (isol, mainly SE) R (isol SE) Personnel T (inland) Maritime V 4

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