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California Wine Atlas

Modoc County

County

Heat class I · 1991-2020 normals

Climate normals in three numbers

1,724°F-days

, Apr 1 – Oct 31

705 GridMET cells cover this region

I

171mm

season rain, Apr 1 – Oct 31

43 mm of it in the , Sep 1 – Oct 31

Warm and cool vintages since 1980

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Rain across the season, and at harvest

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The boundary

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Hovering a shaded region names it; a click opens its page.

Measured vineyard area

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Drought categories, year by year

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What's in the ground

6.9

pH, 1:1 water

12.0cm

, whole profile

91cm

to

Well drained

, dominant condition

Distribution across 808 · mean ◆, median │, p10–p90 bar

6.9
2.0%
25.6%
available water
12.0cm
depth to restriction
91cm

Dominant

  • 8.0%
  • 5.5%
  • 4.8%
  • 4.0%
  • 2.7%

808 map units · soil described over 92.4% of the region’s area · 11.4% is water, rock outcrop or other non-soil · 80% of the described area has a restrictive layer within the profile.

Sand, silt and clay, against every other appellation

CLAYSANDSILT

Loam

42% sand · 33% silt · 26% clay

Sandier than 49% of California appellations and clayier than 79%. Each grey point is one appellation’s topsoil; appellations nest, so this is a distribution of places rather than of land.

Plus 24% rock fragments by volume, which the triangle does not describe — the three fractions are of the fine-earth material only.

Elevation, slope and aspect

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Bearing acreage by variety

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Price per ton

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