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Afternoon Strong Storms Again, But Fewer

October 31, 2013

Update – 15:30 UTC: Guiinea meteorologists continue to monitor a strong storm between Conakry and Kindia near the N1 highway. PulseRad radar estimates indicated that 75-100 mm of rain has fallen in the last 60-90 minutes. Recently, winds have gusted to 90 km/hr in Conakry. Flash flooding is occuring in this region. Dangerous Thunderstorm Alerts continue to be in effect for this storm.

PulseRad precipitation estimates indicate 75-100 mm of rain has fallen since 2 p.m.

PulseRad precipitation estimates indicate 75-100 mm of rain has fallen since 2 p.m.

31 October 2013, 14:30 UTC: Guinea meteorologists are once again tracking the development of afternoon thunderstorms across Basse Guinea, the western region of the country. Today, storm development has been less due to drier air in the mid-levels across the northern and northwestern part of the country. More significant moisture is evident in the southwest and this is where scattered storms have begun to develop. Strong storms have formed in the hills to the northeast of Conakry and near Kindia and Mamou.

Very intense storms have developed betwen Conakry and Mamou.

Very intense storms have developed betwen Conakry and Mamou.

The Guinea Total Lightning Detection System has tracked the development of two very strong storms along the N1 highway running between Conakry and Mamou. The system has generated Dangerous Thunderstorm Alerts for these storms for dangerous lightning, very heavy rain and gusty winds.

Very frequent lightning has triggered the issuance of Dangerous Thunderstorm Alerts (purple polygons) in this region.

Very frequent lightning has triggered the issuance of Dangerous Thunderstorm Alerts (purple polygons) in this region.

PulseRad, simulated radar generated from precipitation rate estimates base on the total lightning detection was showing some extreme rainfall rates. The storms were moving very slow and rainfall totals in the last 30-60 minutes have been locally heavy from 25 – 40 mm/hr.

Rainfall in just an hour has exceeded 50 mm in a few locations due to the slow movement of the storms.

Rainfall in just an hour has exceeded 50 mm in a few locations due to the slow movement of the storms.

Just after 2:30 p.m. local time in Conakry a strong outflow wind gust was observed in the city – gusting to 73 km/hr.

Live observations in Conakry show that the storm to the northeast caused a wind gust across the city that reached 72 km/hr.

Live observations in Conakry show that the storm to the northeast caused a wind gust across the city that reached 73 km/hr.

Hourly updating forecasts using the live station data indicate that precipitation probabilities will be high through the afternoon due to the slow moving nature of the storms.

Due to the slow movement and copious moisture in the region, forecasts indicate high probability for storms until after sunset.

Due to the slow movement and copious moisture in the region, forecasts indicate high probability for storms until after sunset.

One Comment
  1. lamine bah dnmeteo permalink

    Dans l apres midi du 31 Octobre, des orages se sont developpes sur les massifs du fouta Djalon notamment a partir de Mamou vers l est et a forecariah vers le Sud Est de Conakry. A partir de 16 H des coups de tonnerre ont commence a Conakry. Les orages ont evolue vers le Nord Ouest. Des coups de vents, des precipitations et des eclairs ont ete enregistres dans les prefectures de Forecariah, coyah, Conakry, Boffa et boke comme temoignent les chefs de stations de ces localites. Mr Cire sow a forecariah, Mr Sadio Diallo a Coyah, Balde Alpha Oumar a Conakry, Mr Alpha Amadou diallo a Boke et Youssouf Camara a Boffa. Les vents sont moderes et les pluies faibles a moderes. A conakry la pluie a continue a tomber moderement jusqu a tard la nuit. la quantite totale mesuree par le reseau earthnetworks est de 7.4 mm et la vitesse du vent a varie entre 30 et 36 Km/h.A l aeroport de Conakry il a ete enregistre 10,1 mm au cours des 24 heures.
    Dr BAH M L Directeur Meteo Guinee
    Conakry

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