1. UNCLASSIFIED OP GRITROCK SIERRA LEONE MET ASSESSMENT Monday 27 July 2015

2. UNCLASSIFIED 261400 Z SATELLITE IMAGE Valid at Note: Crosses indicate recent thunderstorm activity – red being from the last 10 minutes. Commentary Last night’s storms now well out to the W over the ocean. New showers and storms have developed over the Guinea coast. Showers and storms have developed over SE Guinea, and locally deep convection is also now developing over Sierra Leone, Liberia, inland N Guinea and NW Ivory Coast. Extensive medium cloud over S Sierra Leone and to the SW, extending out over the ocean.

3. Forecast Valid: 0600 Z to 2359 Z Fronts / boundaries valid at 1200Z Issued by the JOMOC Sierra Leone Coastal (including FREETOWN) 0600-1200 Z1200-1800 Z1800-2359 ZRotary V / C TS / VTS / VTS / V / C Airlift Operations V / C TS / VTS / VTS / V / C Trafficability Locally wet groundWet ground Personnel RRR Inland SL 0600-1200 Z1200-1800 Z1800-2359 ZRotary V / C TS / VTS / VTS / V C Trafficability Locally wet groundWet ground Personnel RR R Maritime/Amphibious 0600-1200 Z1200-1800 Z1800-2359 Z Sea and Swell Wind/Visibility V TS / VTS / V Personnel RRR General 06 Z 12 Z 18 Z24 ZIllumination Moon/Sunrise/set Sunrise: 0644 Z Sunset: 1915 Z Moonrise: 271541 Z Moonset: 280343 Z Min/Max mlx between ECT and MCT Min/Time: 1.7 (270300 Z – 270540 Z) Max/Time: 87 @ 272200 Z Moon Phase Phase: 79% becoming 87% (Waxing) FavourableMarginalUnfavourable Any lingering overnight heavy showers and storms initially affecting Sierra Leone will mostly die out or clear away W before daybreak, leaving areas of low cloud, haze and mist, which will mostly clear through the morning. However, an organised area of heavy showers and thunderstorms, with squally winds, will move W across the area during the morning and into the afternoon. Behind this, further showers and storms are likely to develop, lasting through the evening before decaying or clearing W overnight. More low cloud, haze and mist will develop overnight.

4. Meteorological Impact Matrix Tue 28 th JULThu 30 th JUL A similar day to Monday (27 th ) is expected. Low cloud, haze and mist gradually clearing through the morning, along with any lingering overnight showers and storms. However, another large storm system is expected to move W across the area during the day, followed by scattered showers and storms, these lasting into the evening/night. More low cloud, mist and haze forming overnight. Sierra Leone 28/07 00-06Z 28/07 06-12Z 28/07 12-18Z 28/07 18-00Z 29/07 00-06Z 29/07 06-12Z 29/07 12-18Z 29/07 18-00Z 30/07 00-06Z 30/07 06-12Z 30/07 12-18Z 30/07 18-00Z Rotary TS/V/CV/C TS/VTS/V TS/V/CV/CTS/V TS/V/CV/CTS/V Airlift Operations TS/V/CV/C TS/VTS/V TS/V/CV/CTS/V TS/V/CV/CTS/V Trafficability Wet Personnel RRRR RR TT RR RR TT RR Maritime VVVVVVVVVVVV Similar to Wednesday. Wed 29 th JUL Low cloud, haze and mist gradually clearing through the morning, along with any lingering overnight showers and storms. More showers and storms will develop through the afternoon and evening, possibly merging to form more organised systems, these lasting into the night before slowly decaying or clearing W. Low cloud, haze and mist reforming overnight.

5. UNCLASSIFIED Joint Operations Meteorology and Oceanography Centre Web www.jomoc.net RLI SLI www.jomoc.r.mil.uk www.jomoc.s.mil.uk Phone 01923958100 Email NAVYOPS-JOMOCGROUP@mod.uk Address JOMOC, Northwood HQ, Middx, HA6 3HP, UK Please leave any feedback regarding this product in the space below and return to us at JOMOC and we will endeavour to use this feedback to improve our services to you: