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 | Very Low | Low | Moderately Low | Moderate | Moderately High | High | Very High | Extremely High | Canada | United States | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Alaska | 1.23% | 0.220% | 0.183% | 1.08% | 0.155% | 0.137% | 1.29% | 0.106% | 97.8% | ||||||||
Arizona | 5 | 1 | 0.139% | 10.8% | 100% | ||||||||||||
Utah | 2 | 0.376% | 0.196% | 39.2% | 100% | ||||||||||||
Yukon | 0.795% | 1.20% | 10.9% | 14.8% | 9.73% | 100% | |||||||||||
Northwest Territories | 0.420% | 1.90% | 10.9% | 5.41% | 21.2% | 8.33% | 0.275% | 0.935% | 98.7% | ||||||||
District of Columbia | 100% | 100% | |||||||||||||||
Florida | 31 | 6 | 1.79% | 0.355% | 80.3% | 98.6% | |||||||||||
Idaho | 1 | 0.401% | 1.00% | 8.30% | 100% | ||||||||||||
New Hampshire | 2 | 80.8% | 16.8% | 0.233% | 99.8% | ||||||||||||
Rhode Island | 5.84% | 94.9% | 92.2% | ||||||||||||||
Vermont | 1 | 0.314% | 1.37% | 0.398% | 99.6% | ||||||||||||
Washington | 1 | 0.997% | 8.97% | 9.78% | 0.487% | 0.874% | 98.9% | ||||||||||
Wyoming | 15 | 3 | 0.273% | 44.8% | 4.05% | 100% | |||||||||||
Nunavut | 1.49% | 0.968% | 0.100% | 0.238% | 3.40% | 96.8% | |||||||||||
Montana | 8 | 4 | 0.729% | 0.291% | 1.69% | 100% | |||||||||||
Maine | 0.686% | 82.9% | 16.3% | 0.515% | 98.3% | ||||||||||||
North Dakota | 38 | 6 | 5 | 9.96% | 100% | ||||||||||||
Kentucky | 87 | 26 | 2 | 0.803% | 100% | ||||||||||||
Nova Scotia | 3.29% | 4.31% | 0.376% | 7.89% | 93.8% | ||||||||||||
Virginia | 28 | 8 | 0.705% | 6.11% | 99.2% | ||||||||||||
Delaware | 3 | 2.06% | 21.0% | 96.8% | |||||||||||||
Prince Edward Island | 12.7% | 91.5% | 61.6% | ||||||||||||||
Saskatchewan | 7 | 0.919% | 28.6% | 8.52% | 1.02% | 0.695% | 99.9% | ||||||||||
Mississippi | 162 | 45 | 7 | 2 | 18.5% | 99.9% | |||||||||||
West Virginia | 4 | 21.1% | 100% | ||||||||||||||
Nebraska | 67 | 13 | 7 | 29.9% | 30.0% | 100% | |||||||||||
Texas | 193 | 46 | 7 | 0.261% | 0.168% | 8.05% | 99.7% | ||||||||||
Missouri | 95 | 36 | 7 | 1 | 5.67% | 100% | |||||||||||
Louisiana | 93 | 15 | 2 | 1.29% | 0.187% | 98.1% | |||||||||||
Hawaii | 0.296% | 0.586% | 1.76% | 0.911% | 74.5% | ||||||||||||
North Carolina | 54 | 12 | 0.611% | 42.1% | 98.5% | ||||||||||||
Oregon | 2 | 11.5% | 0.302% | 25.8% | 0.243% | 99.9% | |||||||||||
New Brunswick | 0.785% | 3.39% | 0.324% | 35.6% | 98.6% | 0.334% | |||||||||||
Alabama | 149 | 34 | 13 | 2 | 0.101% | 17.9% | 99.9% | ||||||||||
New Mexico | 7 | 3.80% | 24.3% | 100% | |||||||||||||
Kansas | 82 | 56 | 10 | 1 | 12.6% | 48.2% | 100% | ||||||||||
Wisconsin | 32 | 11 | 0.259% | 0.247% | 100% | ||||||||||||
British Columbia | 1 | 1 | 1.05% | 0.147% | 1.12% | 0.594% | 2.88% | 2.80% | 3.66% | 10.6% | 96.4% | 2.51% | |||||
Newfoundland and Labrador | 2.04% | 5.13% | 0.109% | 0.201% | 1.56% | 98.6% | |||||||||||
New Jersey | 2 | 1 | 2.40% | 1.93% | 0.357% | 96.9% | |||||||||||
South Carolina | 46 | 15 | 1 | 58.8% | 99.9% | ||||||||||||
Michigan | 20 | 3 | 1.39% | 0.144% | 0.114% | 99.9% | |||||||||||
Alberta | 9 | 0.424% | 0.728% | 1.52% | 10.5% | 0.222% | 1.32% | 0.431% | 100% | ||||||||
Connecticut | 0.150% | 14.6% | 85.2% | 99.4% | |||||||||||||
Pennsylvania | 31 | 3 | 33.7% | 0.565% | 100% | ||||||||||||
Colorado | 25 | 3 | 17.7% | 35.7% | 100% | ||||||||||||
Nevada | 0.344% | 12.9% | 76.5% | 100% | |||||||||||||
Massachusetts | 2 | 1 | 4.75% | 32.8% | 0.220% | 93.6% | |||||||||||
Georgia | 90 | 31 | 4 | 0.232% | 0.544% | 99.9% | |||||||||||
New York | 17 | 1 | 0.761% | 0.690% | 33.9% | 0.977% | 0.190% | 99.1% | |||||||||
Maryland | 8 | 1 | 2.12% | 1.80% | 97.4% | ||||||||||||
Québec | 1 | 30 | 1 | 0.215% | 1.02% | 2.36% | 2.98% | 1.97% | 1.83% | 1.52% | 99.5% | ||||||
Manitoba | 5 | 4 | 1 | 1 | 0.786% | 11.3% | 36.2% | 21.9% | 0.653% | 4.68% | 99.9% | ||||||
Oklahoma | 104 | 29 | 8 | 2 | 1.67% | 0.437% | 100% | ||||||||||
Tennessee | 82 | 27 | 8 | 2.12% | 100% | ||||||||||||
Ontario | 46 | 1 | 28.2% | 14.0% | 30.5% | 13.7% | 0.243% | 99.9% | |||||||||
California | 3 | 0.133% | 0.438% | 1.08% | 5.44% | 13.5% | 99.5% | ||||||||||
Arkansas | 105 | 23 | 4 | 25.3% | 100% | ||||||||||||
South Dakota | 47 | 7 | 4 | 2.42% | 0.851% | 0.598% | 100% | ||||||||||
Ohio | 42 | 7 | 3 | 0.316% | 1.15% | 1.29% | 100% | ||||||||||
Indiana | 58 | 18 | 1 | 30.9% | 100% | ||||||||||||
Minnesota | 60 | 11 | 4 | 11.2% | 0.159% | 99.8% | |||||||||||
Iowa | 86 | 17 | 4 | 1 | 10.5% | 100% | |||||||||||
Illinois | 108 | 21 | 6 | 0.259% | 100% | ||||||||||||
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