The Washington Post article describes April 2017 in Garden City, Kansas as unusually warm, with 13 days above 70 degrees and eight of those above 80. It was sunny for most of the month with only a few rainy days.
The text does not describe the snowstorm or any crop damage.
Warm, dry conditions in April can speed crop development in southwestern Kansas, but the text gives no direct evidence of a supply change or price effect.
After 425 past weather events, Wheat (HRW) moved a median -0.2% over 5 sessions (48% higher; middle half -2.8% to +3.1%), and +0.3% over 20.
Moves of each commodity's benchmark from the last close before the event. Historical reads pool past events of the same kind; they describe what happened, not what will. Not investment advice.