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 | Major Karst Regions | 240–259 | 220–239 | 200–219 | 180–199 | 160–179 | 140–159 | 120–139 | 100–119 | 80–99 | Less than 80 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Alaska | 28.4% | 69.2% | 2.23% | |||||||||||||
Arizona | 5 | 1 | 6.12% | 44.2% | 33.7% | 22.1% | ||||||||||
Utah | 2 | 16.5% | 70.0% | 8.89% | 2.63% | |||||||||||
Yukon | 2.27% | 100% | ||||||||||||||
Northwest Territories | 1.44% | 2.63% | 82.4% | 14.9% | ||||||||||||
District of Columbia | 100% | |||||||||||||||
Florida | 31 | 6 | 42.1% | 32.7% | 67.3% | |||||||||||
Idaho | 1 | 0.527% | 78.1% | 21.9% | ||||||||||||
New Hampshire | 2 | 100% | ||||||||||||||
Rhode Island | 100% | |||||||||||||||
Vermont | 1 | 100% | ||||||||||||||
Washington | 1 | 1.22% | 98.8% | |||||||||||||
Wyoming | 15 | 3 | 4.22% | 12.4% | 87.6% | |||||||||||
Nunavut | 3.79% | 1.36% | 33.1% | 65.5% | ||||||||||||
Montana | 8 | 4 | 14.7% | 85.3% | ||||||||||||
Maine | 1.04% | 99.8% | 0.153% | |||||||||||||
North Dakota | 38 | 6 | 5 | 18.3% | 100% | |||||||||||
Kentucky | 87 | 26 | 2 | 7.06% | 46.4% | 53.6% | ||||||||||
Nova Scotia | 45.5% | 52.4% | 47.6% | |||||||||||||
Virginia | 28 | 8 | 17.5% | 2.49% | 97.5% | |||||||||||
Delaware | 3 | 100% | ||||||||||||||
Prince Edward Island | 100% | |||||||||||||||
Saskatchewan | 7 | 42.7% | 57.2% | |||||||||||||
Mississippi | 162 | 45 | 7 | 2 | 5.48% | 82.1% | 17.9% | |||||||||
West Virginia | 4 | 27.1% | 99.2% | 0.827% | ||||||||||||
Nebraska | 67 | 13 | 7 | 5.07% | 9.53% | 90.5% | ||||||||||
Texas | 193 | 46 | 7 | 0.625% | 5.26% | 58.9% | 35.9% | |||||||||
Missouri | 95 | 36 | 7 | 1 | 0.407% | 66.4% | 33.6% | |||||||||
Louisiana | 93 | 15 | 2 | 26.8% | 73.2% | |||||||||||
Hawaii | 2.67% | 97.3% | ||||||||||||||
North Carolina | 54 | 12 | 13.2% | 73.0% | 27.0% | |||||||||||
Oregon | 2 | 96.3% | 3.75% | |||||||||||||
New Brunswick | 7.07% | 47.2% | 52.8% | |||||||||||||
Alabama | 149 | 34 | 13 | 2 | 6.35% | 66.2% | 33.8% | |||||||||
New Mexico | 7 | 29.5% | 15.5% | 33.9% | 49.1% | |||||||||||
Kansas | 82 | 56 | 10 | 1 | 2.31% | 5.90% | 91.6% | 2.46% | ||||||||
Wisconsin | 32 | 11 | 31.1% | 100% | ||||||||||||
British Columbia | 1 | 1 | 21.7% | 31.5% | 46.8% | |||||||||||
Newfoundland and Labrador | 9.36% | 29.5% | 69.1% | 1.36% | ||||||||||||
New Jersey | 2 | 1 | 51.6% | 48.4% | ||||||||||||
South Carolina | 46 | 15 | 1 | 100% | ||||||||||||
Michigan | 20 | 3 | 8.03% | 100% | ||||||||||||
Alberta | 9 | 4.20% | 29.7% | 53.1% | 17.2% | |||||||||||
Connecticut | 100% | |||||||||||||||
Pennsylvania | 31 | 3 | 14.8% | 19.4% | 80.6% | |||||||||||
Colorado | 25 | 3 | 48.1% | 51.6% | 0.332% | |||||||||||
Nevada | 4.77% | 1.58% | 63.4% | 31.2% | 3.86% | |||||||||||
Massachusetts | 2 | 1 | 0.220% | 99.8% | ||||||||||||
Georgia | 90 | 31 | 4 | 38.3% | 48.3% | 51.7% | ||||||||||
New York | 17 | 1 | 1.63% | 100% | ||||||||||||
Maryland | 8 | 1 | 0.239% | 100% | ||||||||||||
Québec | 1 | 30 | 1 | 2.89% | 10.4% | 38.5% | 41.0% | 10.1% | ||||||||
Manitoba | 5 | 4 | 1 | 1 | 13.2% | 26.0% | 66.7% | 7.35% | ||||||||
Oklahoma | 104 | 29 | 8 | 2 | 4.68% | 82.2% | 17.8% | |||||||||
Tennessee | 82 | 27 | 8 | 4.04% | 100% | |||||||||||
Ontario | 46 | 1 | 5.81% | 30.4% | 56.0% | 13.7% | ||||||||||
California | 3 | 2.69% | 22.7% | 49.4% | 19.9% | 5.25% | ||||||||||
Arkansas | 105 | 23 | 4 | 17.2% | 50.1% | 49.9% | ||||||||||
South Dakota | 47 | 7 | 4 | 50.1% | 49.9% | |||||||||||
Ohio | 42 | 7 | 3 | 51.6% | 48.4% | |||||||||||
Indiana | 58 | 18 | 1 | 33.8% | 0.561% | 79.2% | 20.2% | |||||||||
Minnesota | 60 | 11 | 4 | 16.9% | 99.9% | |||||||||||
Iowa | 86 | 17 | 4 | 1 | 0.441% | 77.7% | 22.3% | |||||||||
Illinois | 108 | 21 | 6 | 16.2% | 11.8% | 73.8% | 14.4% | |||||||||
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