It is widely known that raw digital climate data are subject to a wide range of errors, which can be introduced along the chain of collecting, digitizing, processing, transferring, storing and transmitting the data (Anonymous 2010). A wide set of procedures for quality controlling (QC) raw data have been developed, which are recommended by the World Meteorological Organization (WMO) and implemented or used by investigators to detect and flag potentially erroneous values in any dataset (e.g. Abbott 2sgma check1986).

The 2sgma check and neighboring station check has been done to the data. The Consistence check to compare the available records from different sources has also been made. ICPAC, as an RCC is obliged to support NMHS build capacity in climate data management which includes climate data quality control.

As mentioned before ICPAC has no mandate to observe climate data, rather receives digital data from 137 IGAD NMHS station data on bilateral agreements on a 10day basis. This is augmented with the rainfall estimates and other datasets from the public domain like http://climexp.knmi.nl/selectdailyseries.cgi which serves in climate monitoring. There are two levels of quality control at ICPAC and they are Primary and Secondary level of quality control.