A last look back at the winter of 2019-20
April 26, 2020
This week, it finally feels like we've made the pivot from spring to summer. After several weeks of cool, wet weather, which delayed the spread of budbreak and encouraged an explosion of cover crop growth, this week it's sunny and warm. It's hit 82, 87, and 90 the last three days, quadrupling our total number of 80+ days in 2020. We're supposed to see another week or more of temperatures in the mid-to-upper 80s, and there's no rain on the horizon.
With that backdrop, I thought it would be a good time to look back on our most recent winter and see how it compares to other recent years. First, a look at rainfall by month:
You can see our late beginning to the rainy season (that November rainfall didn't start until the 26th), the wet December, a record-dry January and February, and the relatively wet last two months. Overall, with only limited prospects for additional precipitation, we're at 16.97" of rain for the winter, 71% of our 24-year average. That's lower than we'd like to see, of course, but with a wet winter last year, it's OK, and better than 10 of those 24 years:
In terms of temperature, we saw 30 below-freezing nights, with our first at the end of October and our last just two weeks ago, on April 7th. Over the last decade, we've averaged 34.5 below-freezing nights, so overall, this year was pretty normal. (If you're curious, our frostiest recent winter was 2011-12, with 57 below-freezing nights, and our least frosty was 2014-15, with just 13.) Our frostiest month was January, which, as you can see below, isn't always the case. Many years, it's too wet in January for it to drop below freezing. Compared to the rest of the last decade:
My sense that March and April were cooler than normal is reflected in the graph above, as well as in the fact that our average high temperatures in March (59.8°F) and April (65.5°F) were colder than the average highs in January (60°F) and February (68.3°F). I don't remember ever seeing that before!
The net result is a vineyard that's in excellent shape to attack the growing season with vigor. The cover crops are lush and deep, and Nathan is starting to cut and bale the sections that the flock couldn't get into in the last six or so weeks. You can see the height of the cover crops dramatically in the vineyard blocks where we've mowed every-other row, to give better air drainage and protect the new growth from frost:
So far, we've seen zero frost damage even from our couple of early-April below-freezing nights, as they affected only the lowest-lying areas, none of which had yet sprouted. The below Grenache block is in one of those lower areas, and it is healthy, vigorous, and doing its best to make up for lost time:
This is one of my favorite times of year in the vineyard. Everything is still green, new growth is exploding out of the gnarled vine trunks, and the vineyard's patterns are starting to come into focus as we begin the long process of turning the cover crops under so they can decompose and provide nutrients to the vines' roots. It's going to be an even longer process than usual this year. The section in the valley in the below photo is Tannat that we turned under in late February, hoping to get a jump on the weeding process. It's already regrown.
For scale, here's me in the Pinot Noir vineyard at my mom's house that is the source of the Tablas Creek Full Circle Pinot Noir. Not pictured: Sadie, who like the vines isn't tall enough to be visible in the high grass:
Overall, it's hard not to be optimistic. Wildflowers are everywhere, and the vineyard looks healthy and beautiful as we begin turning the cover crops under. If it's a little shaggier than normal for late April, well, it's not alone. We're all a bit overdue for a haircut.