Winchester area was rained out pretty much whole day yesterday, resulted in two wetness events, one with ~16 h of wetness with low 60F, and another one with ~7 hours of wetness with high 50F. These resulted in infection risk event for black rot, downy mildew, Botrytis and Phomopsis. Once again, please try to be on top of the situation while we are in the critical period for cluster infection.
Winchester area received precipitations from thunderstorms yesterday. It started around 3:30PM and lasted until 7:00PM. The actual amount of precipitation was not high (0.05 in) compared with other northern VA regions where a severe thunderstorm warning was issued, but since the ending part of the thunderstorm hit during the evening, the relative humidity was high (>90%) until 2 AM or so. Thus, it accounted for 11.5 hours of wetness with the average temperature of 73F. It was warm and long enough for Phomopsis, black rot, and downy mildew. We are still having chances of rain (40-60%) until Monday.
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