Thunderstorms went through Winchester area around 4:30AM this morning. The relative humidity was high (>90%) until 8:00 AM or so. This short estimated wetness event with an average temperature of 63F was too short for most of pathogens, except for downy mildew. [However, since we had two weeks of hot dry weather, the overall risk of downy could be low.]
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Disease risks from today’s rain