We've been stuck in a cold rut, for what seems like a very long time. After an amazing run of sap on March 6-7, the temperatures plummeted and all lines froze rock solid. There wasn't anything to do but bottle maple syrup, so we're now well-supplied for filling orders.
The forecast looks very promising for sap flow and making more maple syrup for the next6-7 days. With Spring arriving on Monday, March 20th, we hope we've experienced the last of winter's cold, but being the month of March, temperature swings are common. Here is the latest temperature graph, from Paul Douglas' blog in the StarTribune: