1. UNCLASSIFIED OP GRITROCK SIERRA LEONE MET ASSESSMENT Tuesday 8 th September 2015

2. UNCLASSIFIED 071300 Z SATELLITE IMAGE Valid at Note: Crosses indicate recent thunderstorm activity – red being from the last 10 minutes. Commentary Storm systems to the N and W of Sierra Leone, part of an African Easterly Wave, moving W into the ocean. Also a smaller storm just to the SW of Sierra Leone also moving W into the ocean. Areas of medium and high cloud over Guinea and E/NE Sierra Leone, moving W. Some convection over W Guinea, Liberia and much of Sierra Leone, currently mainly shallow. Some deeper convection is likely to develop through the rest of today, producing showers and storms. Large amounts of clear sky to the E/NE of Sierra Leone, with just patchy convection.

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 / CTS / V / C Airlift Operations V / CTS / V / C Trafficability Wet/damp groundDamp/wet groundWet ground Personnel R R Inland SL 0600-1200 Z1200-1800 Z1800-2359 ZRotary V / CTS / V / C Trafficability Wet/damp groundDamp/wet groundWet ground Personnel T / R R Maritime/Amphibious 0600-1200 Z1200-1800 Z1800-2359 Z Sea and Swell Wind/Visibility V V Personnel R R General 06 Z 12 Z 18 Z 24 ZIllumination Moon/Sunrise/set Sunrise: 0644 Z Sunset: 1857 Z Moonrise: 090339 Z Moonset: 081534 Z Min/Max mlx between ECT and MCT Min/Time: 1.7 (082000 Z – 090300 Z) Max/Time: 12.5 (at 0600 Z) Moon Phase Phase: 22% decreasing 15% (waning) FavourableMarginalUnfavourable Low cloud slowly lifting during the morning, with early mist and haze clearing. Convective cloud developing from late morning. A scattering of showers and storms are likely to develop during the day, with a more organised storm system then likely to move W across the country late in the day and into the night. Areas of low cloud are likely in association with the storms. Low cloud becoming widespread overnight, with haze and mist reforming too. 0310

4. Meteorological Impact Matrix Wed 09 th SEP Sierra Leone 09/09 00-06Z 09/09 06-12Z 09/09 12-18Z 09/09 18-00Z 10/09 00-06Z 10/09 06-12Z 10/09 12-18Z 10/09 18-00Z 11/09 00-06Z 11/09 06-12Z 11/09 12-18Z 11/09 18-00Z Rotary V/C/TS V/C TSTS/VTS/V/C V/C TSTS/VTS/V/C V/C TSTS/VTS/V/C Airlift Operations V/C/TS V/C TSTS/VTS/V/C V/C TSTS/VTS/V/C V/C TSTS/VTS/V/C Trafficability Wet Personnel RRR RRRR RRRR R Maritime Swell Fri 11 th SEPThu 10 th SEP Showers and storms decaying or clearing W into the ocean. Early mist and haze clearing through the morning. Low cloud slowly lifting and breaking, with more convective cloud developing from late morning. More deep convection, producing some showers and storms, likely to develop during the afternoon, lasting into the evening and overnight. More organised large storm systems may also move W across the area. Widespread low cloud, haze and mist developing overnight. Any residual showers/storms clearing or decaying with low cloud lifting and haze and mist clearing through the morning. Further showers and storms developing through the day and moving across the area, these lasting into the night. Widespread low cloud, haze and mist forming overnight. Similar to Thursday.

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: