19 June 2014 Guinea News has reported that a severe storm cell has caused 13 lightning-related injuries in Konah, a sub prefecture of Tougue. The storm began Thursday afternoon around 1200UTC with In-Cloud lightning to the East. The first Earth Networks Dangerous Thunderstorm Alert was issued in the area at 1300 and severe storm activity continued to roll through in waves until 1600.
At approximately 1530, Konah experienced heavy In-Cloud and Cloud-Ground lightning strikes. CG strikes in a crowded market area reportedly caused 13 people to fall into a coma. Shortly after being treated for shock and minor burns, three people remained in critical condition. All patients were released from the hospital the following day.
There were no fatalities during the storm. Few structures in the area were damaged, and around 40 phones were fried due to electrical charges during the storm.
17 June 2014, 1800 UTC: Slow moving, strong thunderstorms developed late this afternoon over the high terrain of Fouta-Djalon. These storms were detected and tracked by the Guinea Total Lightning Network and the simulated PulseRad radar. The slow moving storms contained torrential rains and gusty winds.
The Guinea Meteorological Department issued Dangerous Thunderstorm Alerts for these storms due to the frequent lightning measured and the potential for flash flooding rains and gusty winds.
PulseRad radar detected a storm mid-way between Mali and Fria that had dropped over 100 mm of rainfall in less than two hours. It is possible that some locations saw rainfall rates over 100 mm/hour.
The storms were heading steadily westward at just 30-35 km/hour and would affect Mali and the central Boke region by 7-8 pm. The city of Boke may not see storms till as late as 10pm but these storms may stay north of the city and keep that region dry.
20 May 2014, 1800 UTC: An upper level area of instability along the Intra-tropical Convergence Zone (ITCZ) moved across the western coast of Africa today, triggering an active and strong area of thunderstorms early in the afternoon.
The storms were tracked by the Guinea Total Lighting Network as they developed and increased in intensity. The alerting system, triggered by the intense rate of lightning detected, issued warnings for parts of interior Sierra Leone for storms producing very heavy frequent lightning (rates over 40 flashes/min) and intense downpours of rain.
The storms had been well forecasted by the ENcast forecast system. Probabilities for thunderstorms and rainfall were over 50% yesterday and increased to near 100% by late morning today. The ENcast forecast for Monrovia in Liberia indicated very high threats for storms today and over the next several days.
By late afternoon and early evening, the storms had moved to the coast and started to develop in southwest Guinea, but the PulseRad radar system tracking accumulate rain was indicating the storms had dropped significant amounts of rain, specifically in Sierra Leone where 25-50mm of rain was common.
19 May 2014, 1730 UTC: A steady sea breeze caused thunderstorms to build across eastern Guinea this afternoon bringing rumbles of thunder to much of the region. The storms developed along the hills northeast of the coast near Forecariah, Fria and Boke.
The heaviest storms formed north and east of Boke and near Forecariah.
The storms were very slow moving, dropping between 25 and 50 mm of rainfall over their lifespan. The heaviest rainfall estimated by PulseRad was a very strong storm near Forecariah. Lightning rates exceeded 50 flashes per minute, as detected by the Guinea Total Lighting Network, for nearly 30 minutes as the storm drifted slowly NW toward Conakry. Rainfall estimates topped out over 100mm just north of the city.
Rainfall estimates on PulseRad show the typical sea breeze rainfall accumulations – storms develop from 30 to 80 km from the coast and rarely drift to the coast, dropping most of the rainfall on the hills that are inland from the coastal plain.
16 May 2014, 1530 UTC: Slow moving, heavy thunderstorms over the Ivory Coast today have been dumping rainfall of 15 – 30 mm over the northern parts of the country this afternoon. Overnight and early morning thunderstorms over Guinea also dropped similar amounts of rain, but had since mostly diminished; giving way to warm humid conditions over much of the country.
This afternoon, the total lightning detection network was tracking an area of heavy storms in Ivory Coast that would move into southern Guinea tonight.
This impulse of instability is being tracked by Guinean meteorologists as this area will affect the country over the next two to three days, bringing cooler temperatures and high probablilities for periods of thunderstorms and heavy rainfall. Forecasts generated by the Guinea ENcast Forecast System for both Fria and Debola show the cooling trend of 4-8 degrees occurring over the next few days.
23 April 2014, 18:30 UTC: Meteorologitsts monitored strong thunderstorms which developed on Wednesday afternoon in the Mamou highlands and plodded westward into Kindia by early evening. The Guinea Meteorological Directorate used simulated PulseRad radar powered by the countrie’s total lightning network to track the powerful storms.
These storms had produced 25 – 50 mm of rainfall across the region in rainfall rates that exceeded 2″/hour at times.
The storms with frequent lightning and heavy rain were also likely producing gusty winds as the moved through the hill country of Kindia toward the city of Fria. Also, the lightning intesity that was measured in the storm caused Dangerous Thunderstorm alerts to be issued for two of the more potent areas of storms.
These storms are forecast to continue to slowly move west over the next several hours but will weaken as they approach the coast.
17 April 2014, 20:00 UTC: Strong evening thunderstorms were being tracked by Guinea meteorologists on Tuesday evening as another hot day lead to thunderstorm development. Temperatures had topped out between 31 and 37 Celsius creating instability leading to the storms. PulseRad simulated radar showed the storms deloping over the highlands of Sierra Leone and Liberia.
The Total Lightning Detection Network was also tracking the strongest cells. Lightning rates reached very frequent intensities causing Dangerous thunderstorm alerts to be issued for the worst of the storms.
The Total Lightning Network indicated thousands of strikes had occured with the strong storms over just one hour period.
Lightning rates in the strongest storms exceeded 30 flashes per minute.
7 April 2014 – 20:00 UTC: Rainy season rainfall continues to be hit and miss across the Guinee Forestiere region in Guinea. Areas of instability that produce rainshowers and storms have been occuring every few days, but most rain over the last month has fallen south of a line from Faranah to Kankan. Total rainfall in the last 7 days in this region has been from 25 mm to as high as 125 mm.
Meteorologists were tracking strong storms today in the region in an area northwest of Nzerekore that had the potential to produce dangerous thunderstorm winds and heavy downpours.
Dangerous Thunderstorm Alerts (DTA) issued by the National Meteorological Directorate were triggered by the detection of high rates of lightning being tracked by the Total Lightning Network. Automated polygons are generated by the Total Lightning system to indicate areas that could experience heavy rain, frequent lightning and gusty winds.
17 March 2014, 1900UTC: For much of the country, Guineans have been shown little sign of a change of seasons. Hot, dry weather continues across much of the region with the flow of hot, dry air massess coming off the inner continent. But meteorologists don’t have to look outside the country for signs that the rainy season is approaching. Semi-regular bouts of showers and storms have been evident in Guinee Forestiere over the last couple of weeks. All signs of the pending rainy season that residents expect in the coming month.
Guinean meteorologists have been tracking the increase of moisture in the southwestern areas of the country using the network of live weather stations, the total lightning detection network and also satellite data. The data shows dew points pushing above 20 degrees in Nzorekore on a regular basis and afternoon showers and storms over the prefecture every 2-3 days.
The rainy season is far from the minds of the rest of the country, only evidence of it’s approach is the closeness of April on the calendar. Northern areas continue to have hot sunshine and very dry air on a regular basis, with only the coastal areas getting into hot, sunny humid weather with winds off the ocean.
The Guinea Meteorological Deparment is also using its new forecast system to track the weather over the coming weeks. The forecasts show that 4 of the next 5 days show chances of rainfall in Nzorekore with chances increasing each day. Sure signs the rainy season is almost underway in the south, and sure signs that northern residents will begin to see a start to fresh, regular rains in a few weeks.