Model:

Chatham Grape Leaf Black Rot Report (Report issued 4/19/2024 4:10 )

Wetting periods start with rainfall (at least 0.01 inch) and continue until the start of at least eight hours without moisture (rainfall, leaf wetness, high relative humidity). Wetting periods are classified as "ongoing" until eight consecutive dry hours have passed. After that, the official end of the wetting period is recorded (the start of the 8 hour dry period).

Black rot model available after 4/15. Pre-bloom not reached. Using 5/1/2024 as a default date.

Time period assessed for wetting events: 4/5 to 4/19/2024.

Hourly weather data missing for: 4/19/2024 1-2AM - 4/19/2024 2-3AM (2 hours); Total of 2 missing hours
Hourly weather data estimated for: 4/5/2024 Midnight-1AM - 4/8/2024 1-2PM (86 hours); 4/8/2024 3-4PM - 4/16/2024 5-6AM (183 hours); 4/16/2024 7-8AM - 4/17/2024 9-10PM (39 hours); 4/18/2024 Midnight-1AM - 4/18/2024 2-3AM (3 hours); 4/18/2024 5-6AM (1 hour); 4/18/2024 9-10AM - 4/19/2024 Midnight-1AM (16 hours); Total of 328 estimated hours

Wet Period	Station	Start of wetting period	End of wetting period	Duration (Hrs.)	Avg temp (F)	Rainfall (in.)	Grape Leaf Black Rot	Progress toward infection
1	Chatham	4/8 2-3PM	4/8 2-3PM	Wet: 1 Span: 1	52.3	1.12	No risk until pre-bloom period	4%
2	Chatham	4/9 3-4AM	4/9 4-5PM Some estimated data used.	Wet: 10 Span: 14	42	0.34	No risk until pre-bloom period	4%
3	Chatham	4/11 1-2PM	4/11 2-3PM Some estimated data used.	Wet: 2 Span: 2	61.7	0.16	No risk until pre-bloom period	22%
4	Chatham	4/12 1-2AM	4/12 10-11AM Some estimated data used.	Wet: 10 Span: 10	40.1	0.32	No risk until pre-bloom period	0%
5	Chatham	4/14 Midnight-1AM	4/14 Midnight-1AM Some estimated data used.	Wet: 1 Span: 1	43.5	0.01	No risk until pre-bloom period	0%
6	Chatham	4/16 6-7AM	4/16 7-8AM Some estimated data used.	Wet: 2 Span: 2	27.6	2.46	No risk until pre-bloom period	0%
7	Chatham	4/16 10-11PM	4/18 8-9AM Some estimated data used.	Wet: 28 Span: 35	41.8	5.22	No risk until pre-bloom period	4%
8	Chatham	4/18 5-6PM	4/18 5-6PM Some estimated data used.	Wet: 1 Span: 1	50.9	0.03	No risk until pre-bloom period	4%

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