BEGINNING
TO RAMP-UP AS FINAL RIPENING OCCURS
WEATHER
TODAY AND LEADING UP TO TODAY
We began harvest two weeks ago with very young Pinot
noir and Chardonnay plantings from Stoller Vineyards, prior
to the end of a showery period in which 1.4 inches fell
(from 9/12-19). With almost a week of sunshine and
highs in the upper 70s/low 80s, we are bringing in ripe
fruit beginning with a little that is compromised slightly
(minor desiccation, a little botrytis). Later vineyard
sites and even higher elevation blocks in early vineyards
are clean and should have perfect late season ripening
over the next couple weeks--forecasts are clear for no
rain at least over the next 10 days, with normal to
slightly above normal temperatures.
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Michael Doing Preventive
Maintenance on the Punchdown Tool in Preparation for Harvest |
In
general, we need an inch or more of rain after warm summers
to adjust chemistries and permit nitrogen mobility in the
vine. Over the last month and a half we have seen 3.5
inches at Stoller Vineyards and 2.2 inches at Ridgecrest. Although
perfection may have been half that amount, the fruit in all
but the youngest plantings, which have superficial root systems
and fruit that ripens earliest and is therefore the most
vulnerable to rain damage, is in perfect shape. Pinot
noir croploads are slightly reduced due to heat effects from
last year and a damp flowering phase in May-June, and with
a very early and warm growing season have close to full,
dark ripeness.
Before
the two rain events during the August 22-28 and September
12-19 periods began moderating the season with cooler temperatures,
2004 saw temperatures the equivalent of 2003. The
heat accumulations to-date are still remarkably close to
last year (the graph below shows accumlation over the
year for 2004, the prior three vintages, and historically).
Degree-days are a simple way of showing how much usable heat
(and therefore potential photosynthetic activity) occurs over
time.
Through
September 23 each year, the following chart shows >50FDegreeDays
for various years at the McMinnville weather station:
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2004 |
2159 DegDays |
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2003 |
2182 |
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2002 |
1995 |
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2001 |
2028 |
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2000 |
1974 |
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1999 |
1858 |
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1998 |
2186 |
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1997 |
2032 |
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1961-90 |
1796 |
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Obviously,
heat and the sunshine it represents is important to vintage
quality. However, significant vintages shown here either
succeeded despite a cool initial ripening season or failed
despite great heat accumulations going into the final phase
of ripening. The vintage can be made or lost in the
next 2-3 weeks and depends largely on full ripening happening
without damaging amounts of rain when they are in a vulnerable
almost-ripe stage. We are optimistically viewing weather
forecasts, but I personally refuse to call the vintage quality
until all fruit is in the winery.
Stay
tuned for detail on our great harvest crew, crop assessment,
photos and the like.
Harry |