Downy Mildew Forecasts for 1999

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 or region (i.e., 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 third 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 green dot denotes the starting point for the trajectory (exact latitude and longitude are written along the left-hand side of the map). The third line has the start date and time for the forecast trajectory. 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.

Preliminary Trajectories for February 1999

March 1999	April 1999	May 1999
June 1999	July 1999	August 1999
September 1999	October 1999	November 1999

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Page last updated on November 1, 1999.