Downy Mildew Forecasts for 1998
| How to Read The Forecasts | Weather Factors Considered | Sample Forecast |
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 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 red dot denotes the starting point for the trajectory (exact latitude and longitude are written along the left-hand side of the map). In the headings, remember that the SECOND line has the start date and time for the forecast trajectory. The third line has some information about the weather data used as input to the trajectory model, and it can be ignored for most purposes.
| May 1998 | June 1998 |
| July 1998 | August 1998 |
| September 1998 | October 1998 |
| November 1998 | December 1998 |
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Page last updated by on November 20, 1998.