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Atlas (Beta)

High Pressure

North AmericaPhysical Environment

A region where atmospheric pressure at the surface is greater than surrounding areas

A map highlights the high-pressure regions in North America with a letter H enclosed in a circle. Near Columbia Kootenay Mountain and, near Ottawa.

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Display by:	High Pressure	Areas of Strong Tornado Occurrence				Habitat Fragmentation									Political Units, 1950
	High Pressure	Areas of Strong Tornado Occurrence	Areas of Strong Tornado Occurrence	Areas of Strong Tornado Occurrence	Areas of Strong Tornado Occurrence	No Data	Very Low	Low	Moderately Low	Moderate	Moderately High	High	Very High	Extremely High	Canada	United States
Alaska						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						1.90%		10.9%	5.41%	21.2%	8.33%	0.275%	0.935%		98.7%
District of Columbia														100%		100%
Florida		31	6								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														94.9%		92.2%
Vermont		1											0.314%	1.37%	0.398%	99.6%
Washington		1									8.97%	9.78%	0.487%	0.874%		98.9%
Wyoming		15	3									0.273%	44.8%	4.05%		100%
Nunavut						0.968%		0.100%	0.238%	3.40%					96.8%
Montana		8	4									0.729%	0.291%	1.69%		100%
Maine													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										4.31%			0.376%	7.89%	93.8%
Virginia		28	8											6.11%		99.2%
Delaware		3												21.0%		96.8%
Prince Edward Island														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									0.168%	8.05%		99.7%
Missouri		95	36	7	1									5.67%		100%
Louisiana		93	15	2										0.187%		98.1%
Hawaii										0.296%	0.586%	1.76%		0.911%		74.5%
North Carolina		54	12											42.1%		98.5%
Oregon		2									11.5%	0.302%	25.8%	0.243%		99.9%
New Brunswick										3.39%			0.324%	35.6%	98.6%	0.334%
Alabama		149	34	13	2									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				0.147%			1.12%	0.594%	2.88%	2.80%	3.66%	10.6%	96.4%	2.51%
Newfoundland and Labrador							5.13%			0.109%	0.201%	1.56%			98.6%
New Jersey		2	1										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													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										32.8%	0.220%		93.6%
Georgia		90	31	4										0.544%		99.9%
New York		17	1			0.690%							33.9%	0.977%	0.190%	99.1%
Maryland		8		1										1.80%		97.4%
Québec	1	30	1				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									0.438%	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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