Each Downy Mildew Forecast includes descriptions of factors pertinent to the disease situation, a general outlook assessing the risk of disease development, and a map showing the flow away from an active area (e.g., a cluster of closely-grouped counties) with a single, centrally-located trajectory.
The maps show the motion of a floating particle that is released into the atmosphere on the date and time given in the second line of the map headings. The release time is in Universal Time on a 24-hour clock, and will be set to correspond to about 10AM local time. A black star (*) denotes the starting point for the trajectory (exact latitude and longitude are written along the left-hand side of the map). On the right-hand side is some information about the weather data used as input to the trajectory model, and it can be ignored for most purposes.
Back
to the Cucurbit Downy Mildew Forecast Homepage
Page last updated on
October 2, 2001.