Significant wetter condition experienced during the month of June in almost every part of the country is a clear indication of establishment of rainfall season particularly over the Northern region. Noticeable is the moderate to extreme wetness over Kano, Nguru and parts of Katsina in the North with Benin, Ikom, Warri and Ikeja in the South. Meanwhile, stations like Yelwa and others in the Northwestern flank of the country were characterized with mild to severe dryness.
Widespread of wetter than normal to normal condition experienced during the month of May in almost every part of the country is an indication of rainfall season particularly over the Northern region. Noticeable is the severe to extreme wetness over Jos and parts of Bauchi, Kaduna and Zaria in the North with only Benin in the South. Nonetheless, Lagos and Ikeja stations in the South experienced mild dryness during the month under review.
During the month under review, most parts of the country were under normal condition except Yelwa, Ilorin, Makrudi and Ibi in the North with only Port Harcourt in the South that was mildly wet. Also, Yola, Potiskum, parts of Maiduguri and Bauchi in the North while Warri and Calabar in the South were under mild to moderately dry condition compared to normal. The 1-month Standardized Precipitation Index (SPI) analysis over the country reveals most parts of the country to be under normal condition.
The substantial rainfall witnessed in February at some parts of the country particularly in the South turned out to be a false start of rains as the intensity significantly dropped. Normal condition continued to dominate the rest of the country especially over the North while mild to severe dry conditions persisted over the Southern part of the country.
The month of February witnessed gradual return of rainfall in some parts of the country particularly in the South, while normal condition continued to dominate the rest of the country especially over the North. Noteworthy is the degree of wetness in the South, which ranged between mild and extreme condition. As in January, the analysis of the cumulative 6-month SPI also shows minimal threat to groundwater aquifers in some Northern parts of the country particularly over Potiskum, Sokoto and parts of Gusau and Katsina.
Continued dominance of normal condition over almost the entire country particularly in the North is still an indication of current dry season usually characterized by widespread of rainfall shortage and hazy weather. Nonetheless, few places in the South such as Benin, Ikom and Enugu experienced mild to moderate wetness during the period under review. The analysis of the cumulative 6-month SPI which reveals a near to threatened groundwater aquifers in some Northern parts of the country may remain particularly over Potiskum, Sokoto and parts of Minna, Gusau and Katsina.