High Pressure
North AmericaPhysical EnvironmentA region where atmospheric pressure at the surface is greater than surrounding areas
NOAAA map highlights the high-pressure regions in North America with a letter H enclosed in a circle. Near Columbia Kootenay Mountain and, near Ottawa.
High Pressure | Areas of Strong Tornado Occurrence | Areas of Strong Tornado Occurrence | Areas of Strong Tornado Occurrence | Areas of Strong Tornado Occurrence | Continental Shelf | No data | Arid and low water use | Low (<10%) | Low-medium (10-20%) | Medium-high (20-40%) | High (40-80%) | Extremely high (>80%) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Alaska | 1.23% | 0.132% | 87.9% | 0.193% | 0.154% | 1.32% | |||||||
Arizona | 5 | 1 | 3.34% | 9.37% | 6.97% | 0.448% | 4.52% | ||||||
Utah | 2 | 20.8% | 13.7% | 0.313% | 0.420% | 49.5% | |||||||
Yukon | 0.923% | 99.0% | |||||||||||
Northwest Territories | 0.420% | 0.342% | 3.62% | ||||||||||
District of Columbia | 100% | ||||||||||||
Florida | 31 | 6 | 1.79% | 10.4% | 12.0% | 0.279% | 0.266% | 0.590% | |||||
Idaho | 1 | 0.772% | 13.8% | 28.4% | 8.83% | 44.9% | |||||||
New Hampshire | 2 | 17.2% | 33.7% | 40.5% | 8.46% | ||||||||
Rhode Island | 5.84% | 0.183% | 86.5% | 6.09% | |||||||||
Vermont | 1 | 7.27% | 88.3% | 4.41% | |||||||||
Washington | 1 | 0.997% | 72.6% | 3.37% | 5.42% | 0.287% | 6.53% | ||||||
Wyoming | 15 | 3 | 21.7% | 0.541% | 70.3% | ||||||||
Nunavut | 1.49% | 0.979% | 18.2% | ||||||||||
Montana | 8 | 4 | 28.7% | 2.60% | 14.6% | 5.24% | 35.2% | ||||||
Maine | 0.686% | 94.9% | 2.65% | 0.228% | 0.817% | ||||||||
North Dakota | 38 | 6 | 5 | 7.38% | 3.22% | 4.45% | 0.249% | 9.67% | 36.7% | ||||
Kentucky | 87 | 26 | 2 | 76.6% | 17.7% | 5.68% | |||||||
Nova Scotia | 3.29% | 0.182% | 80.1% | ||||||||||
Virginia | 28 | 8 | 0.705% | 11.9% | 0.775% | 16.4% | 1.64% | ||||||
Delaware | 3 | 2.06% | 0.105% | 37.7% | 61.1% | ||||||||
Prince Edward Island | 12.7% | 98.5% | |||||||||||
Saskatchewan | 7 | 4.25% | 59.9% | 2.62% | 2.54% | 2.67% | 0.868% | ||||||
Mississippi | 162 | 45 | 7 | 2 | 74.5% | 1.57% | 23.9% | ||||||
West Virginia | 4 | 63.6% | 17.6% | 14.6% | |||||||||
Nebraska | 67 | 13 | 7 | 0.605% | 3.54% | 22.3% | 73.5% | ||||||
Texas | 193 | 46 | 7 | 0.261% | 4.07% | 3.41% | 2.84% | 1.94% | 22.5% | 2.71% | |||
Missouri | 95 | 36 | 7 | 1 | 45.5% | 14.9% | 0.131% | 5.37% | |||||
Louisiana | 93 | 15 | 2 | 1.29% | 54.5% | 20.6% | 5.75% | ||||||
Hawaii | 7.82% | ||||||||||||
North Carolina | 54 | 12 | 0.611% | 0.116% | 12.2% | 54.7% | 3.14% | 0.982% | |||||
Oregon | 2 | 14.3% | 48.2% | 11.8% | 4.82% | 0.772% | 0.847% | ||||||
New Brunswick | 0.785% | 99.5% | |||||||||||
Alabama | 149 | 34 | 13 | 2 | 0.101% | 92.6% | 5.45% | 0.987% | |||||
New Mexico | 7 | 30.3% | 0.128% | 7.32% | 21.7% | ||||||||
Kansas | 82 | 56 | 10 | 1 | 0.176% | 1.82% | 13.8% | 68.4% | |||||
Wisconsin | 32 | 11 | 5.67% | 25.0% | 40.8% | 9.68% | |||||||
British Columbia | 1 | 1 | 1.05% | 92.0% | 1.55% | 0.285% | |||||||
Newfoundland and Labrador | 2.04% | 74.5% | |||||||||||
New Jersey | 2 | 1 | 2.40% | 0.162% | 3.07% | 94.0% | 1.76% | ||||||
South Carolina | 46 | 15 | 1 | 0.748% | 24.6% | 36.2% | |||||||
Michigan | 20 | 3 | 56.0% | 3.00% | 4.63% | 9.70% | |||||||
Alberta | 9 | 3.52% | 56.8% | 0.267% | 4.01% | 3.67% | 11.4% | ||||||
Connecticut | 0.150% | 0.460% | 29.6% | 24.9% | 23.8% | 1.35% | |||||||
Pennsylvania | 31 | 3 | 1.42% | 27.8% | 49.9% | 3.96% | |||||||
Colorado | 25 | 3 | 0.795% | 9.40% | 85.2% | ||||||||
Nevada | 8.21% | 0.731% | 1.40% | 0.413% | 2.80% | 24.0% | |||||||
Massachusetts | 2 | 1 | 4.75% | 0.206% | 0.166% | 33.6% | 8.30% | 30.7% | |||||
Georgia | 90 | 31 | 4 | 0.232% | 8.71% | 47.0% | 37.9% | ||||||
New York | 17 | 1 | 0.761% | 25.4% | 5.89% | 56.3% | 5.19% | 0.401% | |||||
Maryland | 8 | 1 | 2.12% | 0.151% | 4.45% | 64.3% | 1.05% | 8.49% | |||||
Québec | 1 | 30 | 1 | 0.215% | 99.1% | 0.240% | |||||||
Manitoba | 5 | 4 | 1 | 1 | 0.656% | 83.1% | 11.7% | 2.04% | 1.39% | ||||
Oklahoma | 104 | 29 | 8 | 2 | 11.4% | 5.60% | 4.28% | 17.9% | 30.0% | ||||
Tennessee | 82 | 27 | 8 | 90.1% | 5.50% | ||||||||
Ontario | 46 | 1 | 97.2% | 1.67% | 1.13% | ||||||||
California | 3 | 0.133% | 0.688% | 12.5% | 0.232% | 17.8% | 2.26% | 1.00% | |||||
Arkansas | 105 | 23 | 4 | 12.6% | 46.8% | 33.2% | 6.01% | ||||||
South Dakota | 47 | 7 | 4 | 32.7% | 3.47% | 37.3% | 22.0% | ||||||
Ohio | 42 | 7 | 3 | 3.42% | 0.721% | 29.0% | |||||||
Indiana | 58 | 18 | 1 | 0.434% | 1.19% | 8.61% | 4.78% | ||||||
Minnesota | 60 | 11 | 4 | 21.0% | 3.81% | 13.1% | 23.4% | 22.0% | |||||
Iowa | 86 | 17 | 4 | 1 | 26.6% | 12.5% | 44.0% | 16.3% | 0.628% | ||||
Illinois | 108 | 21 | 6 | 30.9% | 0.187% | 44.1% | 9.75% | ||||||
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