THERE were many occurrences of both El Nino and La Nina before 1998 and after. The understanding is also, that the events will be always being there. Collectively, the events are described as the ENSO phenomenon. Incidentally, it is not the phenomenon that is cause for concern but rather the temperature anomaly is what changes the equation – the intensity of the anomaly will realise the corresponding impact. When the anomaly is zero, those occasions are referred to as being neutral.  Extreme ENSO anomalies are influencing global weather patterns whenever these events occur with sufficient “trigger indeces”. Locations are however, affected differently! Moderate-Extreme ENSO- positive anomaly can produce excessive drought and at another location there can be rainfall the converse will be the impact for a moderate-extreme ENSO- negative anomaly.
The implication of a positive ENSO anomaly for Guyana is subsiding/sinking air currents resulting with significant drying out, following the dry adiabatic lapse rate and manifests in higher temperature of the air. Of course the negative anomaly will influence rising motion and vertical transport of moisture and likely extreme rainfall once there are other contributing atmospheric support.
Atmospheric processes are without boundaries, quite dynamic in nature and responds to to multiple variables! ENSO is one of the processes. Atmospheric Scientists do a stunning job to represent these processes/variables using very complex mathematical relationships but those results give options that are best described as probability scenarios. Interpretations and use of those results give guidance to planning with the corresponding level of confidence.
Local weather experts have long tried to show the science in our discipline but there are still some who think that a forecast is only based on persistence and that forecasts are developed after a quick glance through the window.  I am really happy that the weather radar is in place and is functional. It is a tool that can enhance the quality of both short range and statistical forecasting
I am sure the current CHO will be able to provide more information on this topic. I have changed my discipline to metallurgy-close only in spelling to meteorology.