If you are planning a one day activity, look at the “Dryday®” forecast bar chart and find the expected dry weather day (gold colored bar) that is the lowest with other dry weather days on each side of it. The more dry weather days on each side, the better your odds are of having a dry weather day for your activity.

If you are planning a multi-day activity, (three days or one week, for example), look for the longest consecutive grouping of expected dry weather days.  If the month consists mostly of expected risky days (dark gray colored bar) choose the group of risky days which is lowest in height (% risk of rain/snow)  for your activity, or delay it (if possible) until you check the upcoming month for expected dry weather.

The dark gray or light gray bars which are highest in height on the forecast bar chart indicate where most of the moisture should fall...if any moisture does fall in that 30-day reporting period. These are not actual rain or snow forecasts, but weak spots for dry weather within that reporting period, something like "a gate being left open".

A day adjacent to an expected risky day is called a transition day.  The transition day is there to keep you from planning an activity within 24 hours of a risky day.

As the folks at “Dryday®” developed this weather forecast system, they found that when moisture occurred, it sometimes fell on the day before a risky day and sometimes the day after a risky day. For this reason transition days were developed to warn users to stay 24 hours away from risky days. A transition day was inserted before and after each risky day, even if it were a lower % risk than the dry weather day next to it.

The fact that a transition day is within 24 hours of a risky day is more important for your planning than the fact that the transition day is of a lower % risk for rain or snow. The “Dryday®” weather forecast system is designed to protecting your plans for a dry event.