## Criteria for Evaluation of a Blister Rust Event

(only the weather between the time period from July 1 to October 15 was considered for each year)

1. At least 2 consecutive days in which nighttime relative humidity > 90%.

2. At least 2 consecutive days in which daytime relative humidity > 85%.

3. At least 3 consecutive days in which rain > 1 mm and daytime relative humidity is > 85% on any 2 of the 3 days.

4. At least 3 consecutive days in which rain > 1 mm and nighttime relative humidity is > 90% on any 2 of the 3 days.

5. Two consecutive days in which rain is > 1 cm.

6. At least 3 consecutive days in which rain > 1 mm on all days and rain > 1 cm on at least 2 of the days.

7. At least 3 consecutive days in which rain > 1 mm on all days, rain > 1 cm on at least 1 day, and rain > 4 mm on at least 2 of the 3 days, and daytime relative humidity > 85% on at least 1 day.

8. At least 3 consecutive days in which rain > 1 mm on all days, rain > 1 cm on at least 1 day, and rain > 4 mm on at least 2 of the 3 days, and nighttime relative humidity > 90% on at least 1 day.

9. At least 5 consecutive days of rain in which rain is > 1 mm for at least 4 days and rain > 4 mm for at least 1 day.

10. At least 2 consecutive days of rain in which rain > 5 mm on both days, and the sum of the rain over both days > or = 3.5 cm.

11. At least 4 consecutive days in which rain > 4 mm on all days.

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