Widespread rainfall, increased risk of flooding from Wednesday to Saturday – Hydromet Office

The Hydrometeorological Service on Tuesday advises that unstable atmospheric conditions are expected to affect Guyana from April 22 to 25, 2026, resulting in widespread rainfall and an increased risk of flooding, particularly in low-lying and poorly drained areas. While atmospheric conditions are very dynamic, the latest model outputs indicate that Regions Five, Six, Seven, Eight, and Nine are likely to receive the highest amounts of rainfall during this period.
The Hydromet Office stated that unstable atmospheric conditions associated with a surface trough are expected from the evening of April 21 into the early morning of April 22, 2026. “Thereafter, a gradual strengthening and oscillation of the Inter-Tropical Convergence Zone (ITCZ) over the country will persist throughout the remainder of the week. These conditions are likely to be further enhanced by strong upper-level divergence,” a missive to the media added.

Further, it stated that these combined factors are contributing to increased cloudiness, frequent showers, periods of moderate to heavy rainfall and isolated to scattered thunderstorms. However, unsettled conditions are forecast to continue for the remainder of the week, as meteorological models indicate that the projected atmospheric conditions will remain in place.
While there are some indications of a temporary reduction in rainfall activity over coastal areas on Thursday, other parts of the country are still expected to experience cloudiness, showers and possible thunderstorms due to ongoing instability.
“Rainfall amounts are likely to average between 50mm (~2 inches) and 75mm (~3 inches) in 24 hours; however, some areas may record more than 100mm (~4 inches) in 24 hours,” the release stated. As such, citizens can expect widespread rainfall, at times along with thunderstorms (lightning, thunder, increased wind speeds), particularly during the early morning and late afternoon into evening periods. In light of this phenomenon, the Hydromet Office is advising that there will be reduced visibility during intense showers.
Meanwhile, the potential impacts include localised flooding, especially in flood-prone and low-lying areas; water accumulation on roadways leading to hazardous driving conditions; disruptions to outdoor activities, including recreation and construction; and lightning and gusty winds associated with thunderstorms.