Driest on Record: This column displays the driest period on record that is analogous to the period of interest. Only those time periods that correspond directly to the period of interest are surveyed (for example, 30-day rainfall ending March 21st, 2003 are only compared to those 30-day periods that ended on March 21st). If the period of interest represents the driest on record, the previous record is listed.

Wettest on Record: This column displays the wettest period on record that is analagous to the period of interest. Only those time periods that correspond directly to the period of interest are surveyed (for example, 30-day rainfall ending March 21st, 2003 are only compared to those 30-day periods that ended on March 21st). If the period of interest represents the wettest on record, the previous record is listed.