Pecan Scab Attack

When warm nighttime temperatures overlap times of high moisture, pecan scab spores have a good environment to commence their attack. In Oklahoma, we often see these weather conditions in late May and early June.

2011-06-21.Pecan scab.leaf.stem.William Reid.Northern Pecans

(Photo: Leaf with pecan scab (William Reid/Northern Pecans)

Spores released in the spring can infect leaves and young stems. This begins the growing season cycle of pecan scab infection. Spores germinate to enter tender leaf, stem, and nutlet tissue. Fungal hyphae grow inside leaves and stems to produce more spores that infect more leaves, stems, and nuts. Continue reading

Beaver 2017, Too Long Between Rains

Western Oklahoma’s latest rain was critical to the success of this year’s winter wheat and canola crops. It also brought much needed relief to fire fighters as it drenched areas where large, devastating fires occurred in early March. The rain came with storms on March 28-29, 2017.

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If we just looked at rainfall totals, we’d be hard pressed to believe that 2017 is dealing with “dry” year conditions. That’s because rainfall totals since January 1st fail to tell the story of real-world conditions. One has to drill down and scrutinize rainfall totals under the microscope of daily rainfall events and amounts. And the Oklahoma Mesonet has just the tool to do that, the Mesonet Long-Term Averages Graph maker.  Continue reading

Wind’s Weather Role in NW Oklahoma Complex Fires (part 3 of 3)

The stage was set. The players for a drama of tragic proportions assembled. Two leads waited their cue. Already on stage were fine dead fuels from previous growing seasons, low moisture in February, and super low humidities. The next player in the drama entered, high wind speeds. This article is part 3 of 3 articles exploring weather conditions that set the stage for the Northwest Oklahoma Complex Fires that broke out on Monday, March 6, 2017.

2017-03-16.1Mb.Fire wall behind field and farmer.Terena Burke Bridwell.Barby Ranch.The Oklahoman

(Photo: Terena Burke Bridwell/Barby Ranch Beaver County)

At 11:00 AM March 6th winds across Beaver County were out of the southwest. Wind speed at the Oklahoma Mesonet Beaver site was 37 miles per hour. Continue reading

Relative Humidity’s Weather Role in NW Oklahoma Complex Fires (part 2 of 3)

As relative humidities drop, standing, dead plant stems dry out. Dense, dead, dry grasses were the primary fuel source for the devastating fires that flared up on March 6, 2017 in Oklahoma, Kansas, and Texas. This article is part two of a three part series. It covers the relative humidity conditions in Oklahoma leading into this horrendous fire day.

AgBlog.Fire and dead grass.Kathy Larson and Joe Coffey.The Cayenne Room.Oregon (1)

March kicked off with relative humidities unusually low across Oklahoma. Continue reading

February’s Weather Role in NW Oklahoma Complex Fires (part 1 of 3)

Intense, devastating fires flared up one week ago in Oklahoma, Kansas, and Texas. This article is part one of a three part series. It covers the long-term conditions leading into this horrendous fire day. Part One covers weather factors in February that contributed to extremely dry conditions in Beaver, Harper, and Woodward Counties.

2017-03-07.NW OK Complex Fire.fire and truck line at night.Carmen Fire Dept 2

(Photo: Carmen Fire Department 3/7/17)

Continue reading

January 2017 Weather Roundup

January was a month of surprises! We froze from some of the coldest temperatures we’ve seen since 2011, then ended the month basking in spring-like, warm weather.

For January, the departure from Oklahoma Mesonet‘s 15-year average air temperatures ranged from 5 degrees above average in the Northeast and Southeast to 1 degree below average at Kenton in the Panhandle. The majority of winter wheat and canola fields were in areas that came in at 1-2 degrees above average.

2017-02-02.Jan 2017 Avg Air Temp Continue reading

2016 Monthly Air Temperature Review

What did you think of 2016? Was it a hot year? A cooler than average year? Would you believe that the summer was close to average?

Where the heat really came in was the spring and fall. Those were the seasons that climbed way above average.

For the year, 2016 was slightly warmer than the long-term 15-year Oklahoma Mesonet average from 2001-2015. Putnam and Minco were the warmest locations at 3 degrees above their average air temperatures. Most of the eastern side of Oklahoma was 2 degrees above average. In the west, most Mesonet sites were 1 degree above average.

2017-01-05.2016 Avg Air Temperature Continue reading

Frigid Oklahoma Cattle Comfort

What a cold weekend we just went through! For Oklahoma, the cold air swept through the state on Saturday, December 17, 2016. The next two mornings, Sunday and Monday, were especially brutal for cattle.

Checking the Mesonet Cattle Comfort Advisor for Saturday, the maximum Cattle Comfort Index values ran from 82 degrees at Broken Bow in the southeast to zero at Boise City and Eva in the Panhandle.

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