1. OP GRITROCK
Monday 04th May 2015
SIERRA LEONE MET ASSESSMENT

2. SATELLITE IMAGE Valid at 031300 Z Commentary
Remnants of last night’s deep convective activity now well out to the W/SW of Sierra Leone, over the ocean, and continuing to move W. Areas of medium and high cloud continue to stream E from these cells though, over Sierra Leone.
Relatively shallow convection has developed over S parts of Sierra Leone, Liberia, parts of N and SE Guinea and Ivory Coast. Deeper convection, producing heavy showers and thunderstorms, will develop later today over Guinea and move W into Sierra Leone.
Note:
Any crosses indicate recent thunderstorm activity – red being from the last 10 minutes.

3. Coastal (including FREETOWN)
Sierra Leone
Forecast Valid: 0600 Z to 2359 Z
Fronts / boundaries valid at 1200Z
Issued by the JOMOC
Inland SL Z Z Z
Rotary
C/V
TS / V
Trafficability
Wet/Damp ground
Damp ground
Wet ground
Personnel T R
Areas of heavy showers and thunderstorms moving W across many parts of the country during the early hours of the morning and gradually decaying, clearing into the ocean by mid-morning. Areas of low cloud, mist and haze developing behind the showers and storms, this clearing during the morning.
Most parts then having a quieter spell with some sunshine, but further showers and storms developing to the N and E of Sierra Leone, over Guinea, during the afternoon and evening, these then moving W across Sierra Leone during the evening and overnight.
Areas of low cloud, mist and haze redeveloping behind the showers and storms overnight.
Coastal (including FREETOWN) Z Z Z
Rotary
TS (RED), V/C (AMB)
Airlift Operations
Trafficability
Wet/Damp ground
Damp ground
Personnel R T
Maritime/
Amphibious Z Z Z
Sea and Swell
Wind/Visibility V
Personnel R
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. Illumination data is for the upcoming night.
General
06 Z
12 Z Z
24 Z
Illumination
Moon/Sun
rise/set
Sunrise: Z Sunset: Z
Moonrise: Z Moonset: Z
Min/Max mlx between
ECT and MCT
Min/Time: 14.4 ( at Z)
Max/Time: 209 ( Z) (>100 TL Z and FM Z TL Z)
Moon Phase
Phase: 100 % becoming 99 % (Waning)
Favourable
Marginal
Unfavourable

4. Meteorological Impact Matrix Sierra Leone
Tue 05th MAY
Wed 06th MAY
Thu 7th MAY
Areas of heavy showers and thunderstorms moving W across many parts of the country during the early hours of the morning, slowly decaying and clearing into the ocean by mid-morning. Areas of low cloud, mist and haze developing behind the showers and storms, this clearing during the morning.
Most parts then having a quieter spell with some sunshine, but further showers and storms developing to the N and E of Sierra Leone during the afternoon and evening, over Guinea, these then moving W across Sierra Leone during the evening and overnight.
Areas of low cloud, mist and haze redeveloping behind the showers and storms overnight.
Similar to Tuesday.
Similar to Wednesday.
Meteorological Impact Matrix
Sierra Leone
04/05
Darkness
Tue 05
Daylight
05/06
Wed 06
06/07
Thu 07
Rotary
TS/V/(AMB C)
Airlift Operations
Trafficability
Wet
Personnel R
R T
Maritime
V/TS 4

5. Joint Operations Meteorology and Oceanography Centre
Web
RLI SLI
Phone
Address
JOMOC, Northwood HQ, Middx, HA6 3HP, UK
Contact Information
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