Why Nairobi May Not Experience the Expected El Niño Downpours

Nairobi residents expecting heavy rains may face a longer wait or miss the El Niño downpours entirely due to unfavorable conditions in the Indian Ocean.

The Kenya Meteorological Service explained that while El Niño conditions remain strong globally, local ocean temperatures are failing to trigger the expected heavy rainfall in parts of the country.

Speaking on Spice FM on Wednesday, November 11, Eastern Region Meteorological Services Deputy Director Richard Muita clarified that El Niño is a global climate driver rather than a guarantee of rain.

"We need to understand what El Niño is. It is one of the factors causing changes in weather around the globe. We have not received rainfall as forecast because El Niño is just a factor that drives rainfall patterns across the world, and it is not rainfall itself; that should be clearly distinguished," Muita said.

The World Meteorological Organisation previously reported a near 100 percent likelihood of El Niño, raising public expectations of heavy rain across Kenya. However, Muita noted that global forecasts do not automatically mean every region will experience downpours.

Local rainfall in East Africa depends heavily on the Indian Ocean Dipole. Strong rainfall typically occurs when high sea surface temperatures in the Pacific coincide with warmer waters off the East African coast.

When Pacific ocean temperatures rise without a corresponding warm phase in the Indian Ocean, the combination fails to produce significant rainfall in interior areas like Nairobi.

Muita compared the current weather pattern to 2015, when Kenya recorded strong El Niño indicators but missed expected rainfall totals due to weak Indian Ocean conditions.

"A good example is 2015, where we had strong El Niño but the Indian Ocean was low. We had a strong El Niño in 2015, but because of the Indian Ocean, we could not achieve as much rainfall. We are looking at a similar scenario at the moment," he added.

Despite dry conditions in the capital, other regions are experiencing severe weather. Kisumu and surrounding areas have already recorded heavy rainfall, leading to localized flooding and property destruction.

The Met Department cautioned that it is too early to determine the final seasonal outcome for the entire country. Weather officials advised both the public and government agencies to maintain emergency preparations and monitor daily forecasts.