Weather Not Allowing for Best Maple Syrup Flow

19 state in the US produce maple syrup and Minnesota is the western and northern most state to produce it. However this year, unseasonably warmer temperatures and low precipitation has slowed the amount of sap flowing through maple trees to produce syrup.
The syrup season starts running at the beginning of March and flows through April. The ideal conditions are 25 degrees at night and mid 40s during the day.
It takes about 40 gallons of sap to make one gallon of syrup. Nothing is added to the sap to make the syrup; only water is evaporated during the process.