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Ag Weather Impacts
by Dennis Hull, click here for bio

Program: Ag Weather Impact
Date: July 26, 2019

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You can plan on excellent harvest weather as generally dry conditions will continue across the Columbia Basin for at least the next week. Very warm air will prevail again today, but a dry cold front Satuday will drop temperatures into upper 80s and lower 90s where they will stay each day into late next week. Wheat harvesters can expect humidity to remain below 60 percent from around 7 am to near midnight. Hay cut this weekend should have good drying conditions through the curing period. Wind will limit dew formation tonight, but look for light to moderate dew on irrigated fields next week due to light winds and clear skies overnight. Alfalfa balers can plan on very low afternoon humidity today in the 10 to 15 percent range, except 20 to 25 percent in the Kittitas valley. Afternoon humidity will be only slightly higher beginning Saturday. Look for crop water use to be close to normal for late July. For the next 7 day, you can plan on alfalfa, corn, peaches, potatoes, and apples to need between 2 and 2 and ¼ inches. Lawns and melons will use about an inch and ¾ . Looking at growing degree days at base 50 since April 1, most farms are accumulating at a pace 5 to 8 days behind 2018 and 1 to 2 weeks ahead of the 30 year normal. Although temperatures will likely average above normal over the next 2 to 3 weeks, I don’t see any extended periods of extremely hot weather into mid August.

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