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Z North America Coker MS17 > TMI Napa Valley AVAs > Flashcards

TMI Napa Valley AVAs Flashcards

1
Q

What are the AVAs within Napa Valley?

16

A 
Atlas Peak
Calistoga
Chiles Valley District
Coombsville
Diamond Mountain District
Howell Mountain
Los Carneros (Shared with Sonoma County)
Mt. Veeder
Oak Knoll District of Napa Valley
Oakville
Rutherford
St. Helena
Spring Mountain District
Stag's Leap District
Yountville
Wild Horse Valley (Shared with Solano County)
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2
Q

What is the elevation of Atlas Peak AVA?

A

760-2,600 feet

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3
Q

What is the elevation of Calistoga AVA?

A

300-1,200 feet

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4
Q

What is the primary soil of Atlas Peak AVA?

A

Volcanic in origin, with basaltic red color

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5
Q

Describe the soils of Calistoga AVA:

A

Almost completely of volcanic origin, soils range from rocky, stony loam on the hillsides, to gravelly or cobbly loams on the alluvial fans, and heavier clay-silt soils in the valley center areas

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6
Q

What gap cools Calistoga AVA?

A

Chalk Hill Gap

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7
Q

What is the elevation of Chiles Valley AVA?

A

600-1,200 feet

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8
Q

What are some characteristics of Chiles Valley AVA?

A

Fairly warmer summer days, but due to higher elevation and summer fog at night, quite chilly at night.

With colder winters and spring, as well as strong winds, harvest comes later than on valley floor.

Soils on the valley floor are primarily alluvial soils with silty-clay composition of marine origin, with good fertility. Hillsides show more clay-loam and stony-clay composition, mostly marine in origin, with some volcanic outcropping, and less fertility.

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9
Q

What is the climate like in Calistoga AVA?

A

Warm to hot, depending upon time of year. Daytime summer temperaturesmay peak above 100° (38°C) and fall to low 40s°(6°C) at night due to cool afternoon and evening breezes drawn in from the Chalk Hill Gap from the Pacific.

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10
Q

What is the climate like in Atlas Peak AVA?

A

Cool, mountain influenced with temperatures about 10–15° cooler than the valley floor in summer; above the fog line, there is low day-to-night temperature range, with summer temperatures rarely rising above 90°.

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11
Q

What is the climate like in Coombsville AVA?

A

Weather is moderated by its proximity to the San Pablo Bay. Daily average high temperatures can be as much as 10 degrees cooler during the hot months than most other AVAs, and heat spikes tend to be less severe.

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12
Q

What type of soil would you find in Coombsville AVA?

A

Primarily weathered volcanic rock and alluvial deposits from the Vaca Range that surrounds the region

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13
Q

What is the climate like in Diamond Mountain District AVA?

A

Moderately warm temperatures with lower maximum temperatures and higher minimum temperatures than the valley floor, due to topography and altitude. 50 to 90°F in growing season (10 to 32°C).

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14
Q

What is the elevation range of Diamond Mountain District AVA?

A

Minimum of 400 feet

napavintners.com says “122 to 671 feet”, but it is defined by Petrified Forest Road to the North, 400’ elevation line to East, Spring Mountain boundary to South and Sonoma County Line to West. Most of Diamond Mountain, including the peak, is actually in Sonoma.

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15
Q

What are the soils of Diamond Mountain District AVA?

A

Residual uplifted soils of volcanic origin, often reddish and very fine-grained, even gritty in texture, composed of both weathered sedimentary and volcanic origin.

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16
Q

What is the climate like in Howell Mountain AVA?

A

Located above the fog line on the eastern side of the valley, the AVA is warmer and drier than other AVAs with more hours of sunshine and little-to-no marine influence.

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17
Q

What is the elevation range of Howell Mountain AVA?

A

1400 to 2600 feet

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18
Q

Soils of Howell Mountain?

A

Predominantly volcanic, shallow and infertile. Drainage is high, fertility low. (Tufa)

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19
Q

What is the climate like in Los Carneros AVA?

A

Cool, with prevailing marine winds from the San Pablo Bay and through the Petaluma Gap to the west. High temperatures during summer rarely exceed 80°F (27°C) with less diurnal range variation.

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20
Q

What elevations does Los Carneros AVA stretch up to?

A

Sea level to 700 feet

21
Q

What is the soil like in Los Carneros AVA?

A

Clay dominated, very shallow in general, with more loam and hillside alluvials in the northern section. Yields typically are restrained by the hard claypan subsoil, which prevents deep-rooting.

22
Q

What is the climate like in Mount Veeder AVA?

A

Cool to moderate, with most vineyards above the fog-line, meaning warmer nights and cooler days and less diurnal range than the valley floor. Typical mid-summer high temperatures about 85°F (29°C).

23
Q

What is the elevation range of Mount Veeder AVA?

A

500 to 2600 feet according to napavintners.com

400ft minimum according to TTB and Mia says highest vineyard is 2,630’ with the summit at 2,700’

24
Q

What are the soils like on Mount Veeder?

A

Sedimentary based, former seabed, shallow and generally well drained, as well as more acidic, with low fertility. Most have a sandy or sandy-loam texture.

25
Q

Describe the climate of Oak Knoll District AVA:

A

Moderate to cool: marine air and fog can remain until late-morning. Late afternoon breezes frequently occur, maintaining slightly cooler temperatures than upper valley. Mid-summer temperatures may reach 92° F (33°C) and drop to around 50°F (10°C) at night.

26
Q

What elevations does Oak Knoll District AVA stretch up to?

A

sea level to 800 feet

27
Q

What is the defining soil characteristic of Oak Knoll District AVA?

A

The valley’s largest alluvial fan formed by Dry Creek creates the defining feature of the district. The northwest area is composed of volcanically derived soils, with stony or gravelly consistency. South and east areas are transitional from gravel to silty clay loam.

28
Q

Describe the climate of Oakville AVA:

A

Moderately warm, with temperatures commonly in the mid-90°F (34-35.5°C) range in high summer, but also still strongly affected by night and early morning fog, which helps keep acidity levels good. East side of the AVA receives warmer afternoon sun.

29
Q

What is the elevation range of Oakville AVA?

A

130 - 1000 feet

30
Q

What are the soils like in Oakville AVA?

A

Primarily sedimentary gravelly alluvial loams on the western side, with more volcanic but heavier soils on the eastern side. Low to moderate fertility and fairly deep, with average water retention.

31
Q

What is the climate like in Rutherford AVA?

A

Moderately warm, still marginally influenced by early morning fog. Western bench area is cooler, with less late afternoon sun, tempered by afternoon marine winds. (This AVA averages a bit warmer than Oakville and Stags Leap District). Usual summer peak temperatures are mid-90°F (34-35.5°C) with a large diurnal range.

32
Q

What are the elevation ranges of Rutherford AVA?

A

155 to 500 feet (Lower than Oakville b/c Oakville stretches up onto the hillsides, Rutherford is basically all valley floor)

33
Q

What are the soils like in Rutherford?

A

Western benchland is sedimentary, gravelly-sandy and alluvial, with good water retention and moderate fertility. The eastern side has more volcanic soils, moderately deep and more fertile.

34
Q

What is the climate like in Spring Mountain District AVA?

A

Cool to moderate depending on elevation and aspect. Most vineyards sit above the fog line, providing wrmer nights and cooler days than the valley floor. typical mid-summer high temperatures reach 85° (29°C). (Lower diurnal shift)

35
Q

What are the elevations of Spring Mountain District AVA?

A

600 to 2600 feet

36
Q

What are the soils of Spring Mountain District AVA?

A

Primarily sedimentary; weathered sandstone/shale, loamy and friable in texture. Drainage is high, fertility low.

37
Q

What is the climate like in St. Helena AVA?

A

Warm, due to greater protection from western hills, with less fog or wind incursions. This narrowest part of the Napa Valley floor floor provides more heat reflection off the hillsides. Mid-summer temperature peak is often in tmid-to-high 90°s (35° to 37°C).

38
Q

What elevations does St. Helena AVA include?

A

200 to 475 feet

39
Q

What are the soils like in St. Helena AVA?

A

South and west borders are more sedimentary, gravel-clay soils, with lower fertility and moderate water retention. Further north and to the east soils are prevalently volcanic in origin and are deeper and more fertile.

40
Q

What is the climate like in Stags Leap District AVA?

A

Moderately warm with afternoon marine winds acting as an “air-conditioner” to cool the warmer air radiating off the bare rocks of Stags Leap itself and the surrounding hillsides. Mid-summer temperatures can reach 100°F (37.7°C), but more regularly are in mid-90° range (34° to 36°C).

41
Q

How high do Stags Leap District AVA vineyards go?

A

Sea Level to 400’

42
Q

What are the soils like in Stags Leap District AVA?

A

Volcanic gravel-loams on the floor of the valley, with rocky hillsides, and low to moderate fertility due to hard clay subsoils.

43
Q

What is the climate like in Wild Horse Valley AVA?

A

Due to elevation and prximity to San Pablo Bay, it is the coolest of all the Napa Valley AVAs. The air mass that passes over Carneros cools another 10 degrees by the time it rises to the AVA.

44
Q

What are the soils like in Wild Horse Valley AVA?

A

Volcanic in origin, with basaltic red color, shallow with limited water retention, so irrigation is often essential.

45
Q

What are the elevations of Wild Horse Valley AVA?

A

850-2,130’

46
Q

What is the climate like in Yountville AVA?

A

Moderate, with cool marine influence and fog contributing to cool summer mornings and the strong breezes of San Pablo Bay keeping afternoons more comfortable than further up valley. Mid-summer peak temperatures may reach low90°F (33°C), with noticeable diurnal fluctuation to the mid-50°F range (13°C).

47
Q

What are the elevations of Yountville AVA?

A

20-200’

48
Q

What is the soil like in Yountville AVA?

A

Principally gravelly silt loams, sedimentary in origin, and gravelly alluvial soils with rock, moderately fertile.

Z North America Coker MS17 (12 decks)

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