The Nigerian Meteorological Agency (NiMet) has provided a comprehensive explanation for the unexpected rainfall experienced in the northern part of the country, particularly in the Federal Capital Territory (FCT), on Saturday, November 25th, and Sunday, November 26th, 2023.
The agency, operating through its Central Forecast Office (CFO), highlighted the surprise element of the rainfall, considering that this period is traditionally associated with the onset of the harmattan season, characterized by dust, cold, and winds in the northern regions.
NiMet observed public astonishment through its social media channels and clarified that the unusual weather phenomenon was a result of a complex atmospheric interaction. The CFO explained that an opening was identified, linking the mid-latitude Trough with the thermal-lows over West Africa. This connection caused the Inter-Tropical Discontinuity (ITD) to shift far northward above the country, within a 48-hour timeframe, from approximately Latitude 8.00N to about 12.00N.
This northward displacement led to a significant influx of moisture into the country, particularly affecting the western half. Contrary to the normal seasonal expectation of a southward displacement of the ITD during this period, the observed anomaly contributed to the formation of clouds and subsequent thunderstorms over the Northwestern and Northcentral parts of the country, including Abuja, FCT.
NiMet emphasized that the moisture influx, combined with already high energy in the atmosphere, naturally resulted in condensation and cloud formation. The agency underscored that the recent weather event was not indicative of a seasonal shift, but rather a transient fluctuation influenced by temporary weather modulators.
Climate variability, according to NiMet, is the primary factor responsible for such phenomena, leading to short-term fluctuations in weather patterns. The agency noted that global atmospheric processes are subject to both natural and anthropogenic influences, with climate change being a pertinent example.
In addressing the broader context, NiMet acknowledged the impact of human activities, specifically the burning of fossil fuels and deforestation, which have contributed to an increase in greenhouse gas concentrations in the atmosphere. This enhanced greenhouse effect, commonly referred to as climate change, is causing discernible alterations in Earth’s climate.
The statement from NiMet concluded by assuring the public that the agency remains committed to providing timely and accurate weather updates through its various communication platforms, including social media and its website. While the recent rainfall was not in line with the seasonal predictions, NiMet emphasized its dedication to keeping the public informed about any future developments.
